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@@ -1,116 +1,93 @@
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# ToGo-Lab FireFly Morse Blinker
|
||||
# FireFly Solar / 日輪蛍
|
||||
|
||||
**DIY kit**: ATtiny-based Morse blinker. Through-hole. No mains. Simple on purpose.
|
||||
**Default license**: [CC-BY-NC-4.0](https://creativecommons.org/licenses/by-nc/4.0/)
|
||||
**Nichirin Hotaru**
|
||||
*A small solar-powered Morse firefly for the outdoors.*
|
||||
|
||||
---
|
||||
**太陽を宿し、夜にモールスを灯す蛍。**
|
||||
*Taiyō o yadoshi, yoru ni Mōrusu o tomosu hotaru.*
|
||||
*A firefly carrying the sun, lighting Morse in the night.*
|
||||
|
||||
## Intro
|
||||
## Overview
|
||||
|
||||
This is my “Hello World” hardware project on the new ToGo-Lab server.
|
||||
FireFly Solar is a small outdoor LED blinker inspired by the idea of an LED throwie, but powered by sunlight instead of a disposable coin cell.
|
||||
|
||||
Years ago I built a tiny Morse throwie: ATtiny + one LED + one resistor, plus firmware. This version adds a supercapacitor and small solar cells. It uses the LED as a light detector, so it only blinks in the dark.
|
||||
During the day, the solar cell charges the energy storage.
|
||||
At night, the circuit wakes up and sends a simple Morse-style light signal.
|
||||
|
||||
It's not a throwie anymore. Hang it anywhere with decent light (for charging) and dry conditions and let it blink Morse on its own during night.
|
||||
## About this Project
|
||||
|
||||
Goal: a beginner-friendly DIY kit with clear docs and hackable firmware.
|
||||
FireFly Solar is my **technology playground**. It is a small garden object, but its real purpose is to learn by building something complete. With it I learn about:
|
||||
|
||||
Checkout also the [blog about this project](https://https://togo-lab.io/?p=82).
|
||||
ToGo-Lab Cloud [link](https://nextcloud.togo-lab.io/index.php/f/1176), actual internal link only.
|
||||
Suggestions welcome. Open an issue or email [tgohle@togo-lab.io](mailto:tgohle@togo-lab.io).
|
||||
- **Circuit design at the edge**: in this case, as low power as possible
|
||||
- **PCB design**
|
||||
- **Weatherproof casing**
|
||||
- **ATtiny programming**
|
||||
|
||||
---
|
||||
Possible next technology step: everything about DIY SMD design and soldering.
|
||||
|
||||
## Repo layout
|
||||
```
|
||||
├── doc
|
||||
│ ├── assets // pictures, diagrams..
|
||||
│ └── logs // lab logs
|
||||
├── firmware
|
||||
│ ├── archive // archive, derived from...
|
||||
│ │ └── ATTINY45_2014_MorseThrowie
|
||||
│ │ ├── ATTINY45_2014_MorseThrowie.ino
|
||||
│ │ └── pitches.h
|
||||
│ ├── include
|
||||
│ ├── FireFly_MorseBlinker // arduino IDE file
|
||||
│ └── src
|
||||
├── hardware
|
||||
│ ├── CAD // CAD files for mechanical work
|
||||
│ │ └── ToGo-Lab_FireFly_MorseThrowie.dxf
|
||||
│ └── KiCad // KiCad project files
|
||||
│ └── 0001-FireFly
|
||||
│ ├── 0001-FireFly-backups
|
||||
│ │ ├── 0001-FireFly-2025-09-07_180819.zip
|
||||
│ │ └── 0001-FireFly-2025-09-07_181506.zip
|
||||
│ ├── 0001-FireFly.kicad_pcb
|
||||
│ ├── 0001-FireFly.kicad_prl
|
||||
│ ├── 0001-FireFly.kicad_pro
|
||||
│ └── 0001-FireFly.kicad_sch
|
||||
├── License_-_CC_BY-NC_4.0.md
|
||||
└── README.md
|
||||
```
|
||||
## Project Goals
|
||||
|
||||
---
|
||||
- Build a solar-powered outdoor Morse blinker
|
||||
- Keep the hardware simple and robust
|
||||
- Improve practical low-power design skills
|
||||
- Test mechanical concepts for outdoor 3D-printed parts
|
||||
- Learn what is needed to turn a small electronics project into a possible DIY kit
|
||||
|
||||
## Hardware
|
||||
- **MCU**: ATtiny45/85 (internal RC clock, no crystal).
|
||||
- **I/O**: 1× LED + series resistor. Unused pins broken out to breadboard-style pads.
|
||||
- **Burning Attiny**: external ISP programmer via Arduino IDE; PDIP-8 ATtiny45/85 footprint.
|
||||
- **Power**: 3V DC (coin cell & & solar cell + supercapacitor with Schottky diodes to extend battery power).
|
||||
- **Safety**: low voltage only. Observe polarity.
|
||||
- **PCB**: hackable; access to unused ATtiny pins. (big pads for beginners, clear silks, LED polarity marks)
|
||||
## Software
|
||||
|
||||
---
|
||||
The firmware runs on an **ATtiny85** at 1 MHz (internal clock, ATTinyCore: `clock=1internal`, `millis=disabled`). The LED itself is used as the light sensor. When it is dark, the firefly sends a short Morse text ("TGO 26") about once a minute.
|
||||
|
||||
## Firmware / Arduino IDE
|
||||
- Follow `Documentation/ToGo-Lab_FireFly_ArduinoIDE_Program_Guide.md`.
|
||||
- Board core: any stable ATtiny45/85 core.
|
||||
- Clock: **internal**. No fuse change required for first tests.
|
||||
- Programmer: USBasp / AVRISPmkII / Arduino-as-ISP.
|
||||
- Open the sketch in `0001_FireFly/Program/`.
|
||||
### Current Firmware version: v0.4 (2026-11-08)
|
||||
|
||||
---
|
||||
Goal: lowest possible average current.
|
||||
|
||||
## Assembly
|
||||
- Follow `Documentation/ToGo-Lab_FireFly_Assembly_Guide.md`.
|
||||
- First power-up: LED should blink test pattern. If not, recheck polarity and bridges.
|
||||
Changes vs v0.3:
|
||||
|
||||
---
|
||||
- No `delay()` / `millis()`; Timer0 and Timer1 are gated off in PRR.
|
||||
- The watchdog (interrupt mode) is the only timebase: Morse units (~96 ms), the sensing window and the 8 s sleeps. The CPU sleeps in power-down in between.
|
||||
- Darkness sensing: the CPU sleeps in 16 ms steps while the LED junction discharges, instead of a busy `digitalRead()` loop. Bright light exits after the first step. `darknessThreshold` is replaced by `darkSteps`.
|
||||
- The ADC is disabled before it is gated off in PRR; pins are set up before PRR.
|
||||
- After a power-on or external reset, no blinking for `RECOVER_CYCLES` (about 16 min), so the supercap can recharge.
|
||||
- `DEBUG_TEST` switch for bench testing: 8 s cycle, no recovery wait, short flash when the sketch decides "bright". Set it to 0 for the field.
|
||||
- Optional `BOD_FUSE_ENABLED` (BOD off during sleep); unused with the BOD fuse off.
|
||||
|
||||
## Test / Bring-up
|
||||
1. Visual check; no shorts.
|
||||
2. Power at 3–5 V. Current < 10 mA idle.
|
||||
3. Program firmware over ISP.
|
||||
4. Verify Morse timing; adjust WPM in `config.h` if needed.
|
||||
5. Optional: measure current.
|
||||
Tested: compiles with ATTinyCore and runs on hardware. Current draw is not yet measured.
|
||||
|
||||
---
|
||||
## PCB
|
||||
|
||||
## BOM
|
||||
- Follow `Documentation/ToGo-Lab_FireFly_BOM.csv` as source of truth.
|
||||
- Finished: a batch of 10 is assembled, tested and working.
|
||||
- Latest adjustment: fine-tuned the resistors for the LED, and the 3.9 V Zener diode is confirmed safe avoid overcharging 4V supercap.
|
||||
- Next version: the PCB should be a little shorter. The wiring space is a bit too tight now.
|
||||
|
||||
---
|
||||
## Casing
|
||||
|
||||
## Files to fabricate
|
||||
- Gerbers and drill files from `KiCad/fab/` (board house-ready).
|
||||
- Project file: `0001_FireFly/KiCad/ToGo-Lab_FireFly.kicad_pro`.
|
||||
Works basically as intended. Lessons for the next version:
|
||||
|
||||
---
|
||||
- Better locking of the solar modules.
|
||||
- The rope structure works, but building it is too complicated and takes a lot of nerves.
|
||||
- Using material tension to secure the modules via rope was basically a good idea.
|
||||
|
||||
## Known constraints
|
||||
- Through-hole only. No reflow.
|
||||
- Minimal I/O to keep it beginner-friendly.
|
||||
- Low power is nice but optional; optimize after the basic release.
|
||||
## Naming
|
||||
|
||||
---
|
||||
The English project name remains:
|
||||
|
||||
## Roadmap (tech only)
|
||||
- v0.1-proto: breadboard + first PCB, single message, speed presets.
|
||||
- v1.0: build guide, BOM with alternates, pilot 10 units.
|
||||
- v1.1: docs polish, optional brightness setting, minor PCB tweaks.
|
||||
**FireFly Solar**
|
||||
|
||||
For blog posts, documentation, and presentation, the project also uses the Japanese name:
|
||||
|
||||
**日輪蛍 / Nichirin Hotaru**
|
||||
|
||||
The name roughly means **sun-disc firefly**. It keeps the solar theme, adds a slightly mythic tone, and still fits a small piece of outdoor hardware.
|
||||
|
||||
---
|
||||
|
||||
## Contributing
|
||||
PRs and issues welcome. Keep it simple.
|
||||
Photos of your build you send me go in `Documentation/gallery/` with a short caption and license notice.
|
||||
|
||||
PRs and issues welcome. Keep it simple.
|
||||
Photos of your build you send me go in `Documentation/gallery/` with a short caption and license notice.
|
||||
|
||||
---
|
||||
|
||||
## License
|
||||
|
||||
Default license: [CC-BY-NC-4.0](https://creativecommons.org/licenses/by-nc/4.0/)
|
||||
@@ -0,0 +1,512 @@
|
||||
/*
|
||||
=============================================================================
|
||||
FireFly Solar / 日輪蛍 – Nichirin Hotaru / a Solar Morse Throwie
|
||||
|
||||
太陽を宿し、夜にモールスを灯す蛍。
|
||||
Taiyō o yadoshi, yoru ni Mōrusu o tomosu hotaru.
|
||||
A firefly carrying the sun, lighting Morse in the night.
|
||||
=============================================================================
|
||||
Project definitions, sources
|
||||
-----------------------------------------------------------------------------
|
||||
Version : 0.5 - ATTiny85, 1 MHz, BOD fuse disabled
|
||||
used Flash: 1284 bytes
|
||||
|
||||
gitea : https://gitea.togo-lab.io/tgohle/0001-FireFly
|
||||
Date : 2026-11-10
|
||||
|
||||
|
||||
Key changes Version 0.5 (goal: lowest possible average current):
|
||||
|
||||
- No delay(), no millis(): Timer0 and Timer1 are not needed any more and
|
||||
are switched off in PRR.
|
||||
- ALL timing (Morse units, sensing window, 8 s sleep) is done by the watchdog
|
||||
in interrupt mode while the CPU is in POWER-DOWN. The CPU runs only for a
|
||||
few microseconds per wake-up. LED pins keep their state in power-down.
|
||||
- Darkness sensing by LED no longer polls digitalRead() in a busy loop (that was
|
||||
~0.3-1 s awake per cycle). The LED junction is charged, then the CPU sleeps
|
||||
in 16 ms steps and checks the pin: bright light exits after the first step.
|
||||
- ADC is disabled BEFORE it is gated off in PRR (order matters).
|
||||
- After a power-on, external, brown-out or watchdog reset the sketch waits
|
||||
RECOVER_CYCLES cycles before blinking, allowing the supercap to recharge.
|
||||
Default ~13 min 20 s (nominal); the debug option bypasses recovery.
|
||||
- Startup code saves MCUSR and disables the watchdog early (.init3), avoiding
|
||||
a watchdog-reset loop before setup() can execute.
|
||||
- Optional: BOD disable during sleep (only useful if BOD fuse is enabled).
|
||||
But found out that also BOD Fuse for 1.8V shorten unnecessary blinking time,
|
||||
will still work ~1V, meaning ~20 min longer blinking time.
|
||||
- Field Test: After a sunny day in Winter, outdoor -1 ... 8°C, with a payload
|
||||
of 10 signs) it blinks for >> 12h.
|
||||
|
||||
Timing note: the watchdog oscillator is not precise (changes with Vcc and
|
||||
temperature). All Morse timing comes from the same clock, so dit/dah/gap
|
||||
ratios stay correct; only the absolute speed drifts a little.
|
||||
The HW actual allowes 5V and 3.3V, standard is 3.3V. So don't expec exact timing.
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
Inspired by Karl Lunt's FireFly project:
|
||||
http://www.seanet.com/~karllunt/fireflyLED.html
|
||||
|
||||
Morse code reference:
|
||||
'A', ".-" 'B', "-..." 'C', "-.-."
|
||||
'D', "-.." 'E', "." 'F', "..-."
|
||||
'G', "--." 'H', "...." 'I', ".."
|
||||
'J', ".---" 'K', "-.-" 'L', ".-.."
|
||||
'M', "--" 'N', "-." 'O', "---"
|
||||
'P', ".--." 'Q', "--.-" 'R', ".-."
|
||||
'S', "..." 'T', "-" 'U', "..-"
|
||||
'V', "...-" 'W', ".--" 'X', "-..-"
|
||||
'Y', "-.--" 'Z', "--.."
|
||||
|
||||
'1', ".----" '2', "..---" '3', "...--"
|
||||
'4', "....-" '5', "....." '6', "-...."
|
||||
'7', "--..." '8', "---.." '9', "----."
|
||||
'0', "-----"
|
||||
|
||||
'.', ".-.-.-" ',', "--..--" '?', "..--.."
|
||||
'!', "-.-.--" ':', "---..." ';', "-.-.-."
|
||||
'(', "-.--." ')', "-.--.-" '"', ".-..-."
|
||||
'@', ".--.-." '&', ".-..." '-', "-....-"
|
||||
'/', "-..-." ''', ".----." '+', ".-.-."
|
||||
'=', "-...-" '_', "..--.-"
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
Legal stuff / Copyright:
|
||||
License_-_CC_BY-NC_4.0
|
||||
https://creativecommons.org/licenses/by-nc/4.0/
|
||||
-----------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include <avr/sleep.h>
|
||||
#include <avr/wdt.h>
|
||||
#include <avr/pgmspace.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <string.h>
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// DEBUG_TEST 1 = bench testing: no reset-recovery wait, a blink attempt every
|
||||
// 8 s, and a short flash when the sketch thinks it is BRIGHT.
|
||||
// SET TO 0 FOR THE FIELD (40 s idle sleep, ~13m20s reset recovery).
|
||||
#define DEBUG_TEST 0
|
||||
|
||||
#ifndef cbi
|
||||
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
|
||||
#endif
|
||||
#ifndef sbi
|
||||
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
|
||||
#endif
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Watchdog timeout codes (nominal, at ~5 V; real values vary with Vcc/temp):
|
||||
// actual HW uses 3.3 (standard) or 5V (for blue LED experimental setup)
|
||||
// so don't expect exact timing)
|
||||
// 0=16ms 1=32ms 2=64ms 3=128ms 4=250ms 5=500ms
|
||||
// 6=1s 7=2s 8=4s 9=8s
|
||||
//
|
||||
// One Morse unit = UNIT_WDT_A + UNIT_WDT_B -> 64 ms + 32 ms = ~96 ms
|
||||
// A=3, B=0 -> ~144 ms (easier to read, more LED time)
|
||||
// A=3, B=0xFF -> ~128 ms
|
||||
// A=2, B=0xFF -> ~64 ms (fast, less LED time, harder to read by eye)
|
||||
// Use 0xFF for B to skip the second sleep.
|
||||
#define UNIT_WDT_A 2
|
||||
#define UNIT_WDT_B 1
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Sleep interval between two sensing/blink attempts: sleepCycles x 8 s.
|
||||
// 5 x 8 s = 40 s. Goal ~ 1 blink/min.
|
||||
#if DEBUG_TEST
|
||||
const uint8_t sleepCycles = 1;
|
||||
#else
|
||||
const uint8_t sleepCycles = 5;
|
||||
#endif
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Darkness window in 16 ms steps (nominal).
|
||||
// After charging the LED junction the CPU sleeps step by step. If the pin
|
||||
// reads LOW within the window the LED discharged quickly = bright = no blink.
|
||||
// Still HIGH after the full window = dark = blink.
|
||||
// Longer window = triggers in darker conditions
|
||||
// The window costs almost no energy (CPU sleeps), so it is only a threshold.
|
||||
// Calibrate at real dusk. Old threshold 17000 loops: measure the old
|
||||
// sensDarkness() time with micros() at your dusk level and divide it by 16 ms.
|
||||
const uint8_t darkSteps = 40; // ~640 ms
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// After a power-on / brown-out / external / watchdog reset, do not blink for
|
||||
// this many cycles (each has 40 s of sleep) so the supercap can recharge.
|
||||
// 20 -> ~13 min 20 s nominal. Set to 0 for bench testing/uploading.
|
||||
#if DEBUG_TEST
|
||||
#define RECOVER_CYCLES 0
|
||||
#else
|
||||
#define RECOVER_CYCLES 20
|
||||
#endif
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Set to 1 only if the BOD fuse is enabled (e.g. hfuse 0xDE = 1.8 V).
|
||||
// Then BOD is switched off during power-down to save its ~20 uA.
|
||||
// With BOD fuse disabled this has no effect, leave it 0.
|
||||
#define BOD_FUSE_ENABLED 0
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// LED pin definitions (N-side = cathode, P-side = anode for sensing/driving).
|
||||
#define LED1_N_SIDE 3
|
||||
#define LED1_P_SIDE 4
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// ATTiny85 Arduino pins 0, 1, 2 are unused in actual design and physically open.
|
||||
// Keep them in INPUT_PULLUP so they do not float and waste current.
|
||||
#define UNUSED_PIN_0 0
|
||||
#define UNUSED_PIN_1 1
|
||||
#define UNUSED_PIN_2 2
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// ATTiny85 has 512 bytes SRAM; this keeps the Morse text in flash.
|
||||
// Only uppercase letters, digits, spaces, and the special chars in the switch
|
||||
// below are emitted. Lowercase letters are converted to uppercase.
|
||||
// Shorter text = less LED time = less energy.
|
||||
const char morseText[] PROGMEM = "TOGO-LAB.IO FIREFLY";
|
||||
// Ruler: 0....0....1....1....2
|
||||
// Ruler: 01...5....0....5....0
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Watchdog interrupt flag - volatile because it is written in an ISR.
|
||||
volatile bool f_wdt = false;
|
||||
|
||||
// Remaining cycles without blinking after a reset.
|
||||
static uint8_t recoverCycles = 0;
|
||||
|
||||
// Preserve the reset flags before Arduino startup and stop a watchdog left
|
||||
// running by a previous reset. AVR-libc's recommended .init3 pattern.
|
||||
// .noinit is not cleared by C runtime initialization.
|
||||
static uint8_t resetCauseEarly __attribute__((section(".noinit")));
|
||||
|
||||
void earlyWatchdogInit(void) __attribute__((used, naked, section(".init3")));
|
||||
void earlyWatchdogInit(void)
|
||||
{
|
||||
resetCauseEarly = MCUSR;
|
||||
MCUSR = 0; // Clear WDRF before disabling WDT.
|
||||
wdt_disable(); // Prevent repeated ~15 ms watchdog resets.
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Forward declarations.
|
||||
static void sleepWdt(uint8_t ii);
|
||||
static void waitUnits(uint8_t n);
|
||||
void configureUnusedPins();
|
||||
void releaseLedPins(int LED_N, int LED_P);
|
||||
bool isDark(int LED_N, int LED_P);
|
||||
void morse(int LED_N, int LED_P);
|
||||
void dit(int LED_P);
|
||||
void dah(int LED_P);
|
||||
|
||||
// ===========================================================================
|
||||
// Setup
|
||||
// ===========================================================================
|
||||
void setup()
|
||||
{
|
||||
// Reset cause was captured before C/Arduino initialization in .init3.
|
||||
// Include WDRF: a watchdog reset also needs supercap recovery time.
|
||||
if (resetCauseEarly & ((1 << PORF) | (1 << BORF) |
|
||||
(1 << EXTRF) | (1 << WDRF))) {
|
||||
recoverCycles = RECOVER_CYCLES;
|
||||
}
|
||||
|
||||
// Pins first (while the Arduino core can still reach all timer registers
|
||||
// for its turnOffPWM() handling in digitalWrite()).
|
||||
configureUnusedPins();
|
||||
releaseLedPins(LED1_N_SIDE, LED1_P_SIDE);
|
||||
|
||||
// ADC off FIRST, then gate its clock. With PRADC set, ADC register
|
||||
// writes are ignored, so the order matters.
|
||||
cbi(ADCSRA, ADEN);
|
||||
|
||||
// Analog comparator off.
|
||||
ACSR |= (1 << ACD);
|
||||
|
||||
// Power reduction: ADC, USI, Timer0, Timer1 all off.
|
||||
// Nothing in this sketch uses them: no delay(), no millis(), no analogWrite().
|
||||
PRR = (1 << PRADC) | (1 << PRUSI) | (1 << PRTIM0) | (1 << PRTIM1);
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Main loop
|
||||
// ===========================================================================
|
||||
void loop()
|
||||
{
|
||||
if (recoverCycles > 0) {
|
||||
recoverCycles--;
|
||||
} else if (isDark(LED1_N_SIDE, LED1_P_SIDE)) {
|
||||
morse(LED1_N_SIDE, LED1_P_SIDE);
|
||||
}
|
||||
#if DEBUG_TEST
|
||||
else {
|
||||
// Sketch decided "bright": one short ~128 ms flash so you can see it.
|
||||
pinMode(LED1_N_SIDE, OUTPUT);
|
||||
pinMode(LED1_P_SIDE, OUTPUT);
|
||||
digitalWrite(LED1_N_SIDE, LOW);
|
||||
digitalWrite(LED1_P_SIDE, HIGH);
|
||||
sleepWdt(3);
|
||||
digitalWrite(LED1_P_SIDE, LOW);
|
||||
}
|
||||
#endif
|
||||
|
||||
// Return LED pins to high-Z before sleeping.
|
||||
// Internal pullups stay disabled for the LED pins.
|
||||
releaseLedPins(LED1_N_SIDE, LED1_P_SIDE);
|
||||
|
||||
for (uint8_t i = 0; i < sleepCycles; i++) {
|
||||
sleepWdt(9); // 8 s each
|
||||
}
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Pin helpers
|
||||
// ===========================================================================
|
||||
void configureUnusedPins()
|
||||
{
|
||||
pinMode(UNUSED_PIN_0, INPUT_PULLUP);
|
||||
pinMode(UNUSED_PIN_1, INPUT_PULLUP);
|
||||
pinMode(UNUSED_PIN_2, INPUT_PULLUP);
|
||||
}
|
||||
|
||||
void releaseLedPins(int LED_N, int LED_P)
|
||||
{
|
||||
// digitalWrite LOW before INPUT disables the internal pullup on Arduino cores.
|
||||
digitalWrite(LED_N, LOW);
|
||||
digitalWrite(LED_P, LOW);
|
||||
pinMode(LED_N, INPUT);
|
||||
pinMode(LED_P, INPUT);
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Sleep helpers (watchdog = only timebase)
|
||||
// ===========================================================================
|
||||
ISR(WDT_vect)
|
||||
{
|
||||
f_wdt = true;
|
||||
}
|
||||
|
||||
// Sleep in POWER-DOWN until the watchdog interrupt fires after timeout code ii
|
||||
// (0=16 ms ... 9=8 s). Reconfigures the watchdog on every call, so the full
|
||||
// interval always starts fresh.
|
||||
static void sleepWdt(uint8_t ii)
|
||||
{
|
||||
if (ii > 9) ii = 9;
|
||||
|
||||
uint8_t bb = ii & 7;
|
||||
if (ii > 7) bb |= (1 << WDP3);
|
||||
|
||||
// Interrupt-only mode (WDE = 0). WDIF written as 1 clears a stale flag.
|
||||
const uint8_t cfg = bb | (1 << WDIE) | (1 << WDIF);
|
||||
|
||||
f_wdt = false;
|
||||
cli();
|
||||
wdt_reset();
|
||||
|
||||
// WDCE/WDE unlock and configuration: two consecutive OUT instructions.
|
||||
// The second write is guaranteed to occur within the required four cycles.
|
||||
const uint8_t unlock = _BV(WDCE) | _BV(WDE);
|
||||
__asm__ __volatile__(
|
||||
"out %[wdt], %[unlock] \n\t"
|
||||
"out %[wdt], %[config] \n\t"
|
||||
:
|
||||
: [wdt] "I" (_SFR_IO_ADDR(WDTCR)),
|
||||
[unlock] "r" (unlock),
|
||||
[config] "r" (cfg)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
|
||||
|
||||
// Atomic sleep entry: after sei() the next instruction (sleep_cpu) still
|
||||
// executes before any interrupt is serviced, so the wake-up cannot be missed.
|
||||
// Loop again if something else woke the CPU.
|
||||
while (!f_wdt) {
|
||||
sleep_enable();
|
||||
#if BOD_FUSE_ENABLED
|
||||
sleep_bod_disable();
|
||||
#endif
|
||||
sei();
|
||||
sleep_cpu();
|
||||
sleep_disable();
|
||||
cli();
|
||||
}
|
||||
sei();
|
||||
}
|
||||
|
||||
// Wait n Morse units in power-down.
|
||||
static void waitUnits(uint8_t n)
|
||||
{
|
||||
while (n--) {
|
||||
sleepWdt(UNIT_WDT_A);
|
||||
#if UNIT_WDT_B != 0xFF
|
||||
sleepWdt(UNIT_WDT_B);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Light sensor
|
||||
// ===========================================================================
|
||||
// Returns true if it is dark.
|
||||
// Charges the LED junction capacitance, then lets it bleed through the
|
||||
// reverse-biased LED while the CPU sleeps. Checks the pin every ~16 ms.
|
||||
// LOW within the window -> bright (discharged fast)
|
||||
// still HIGH at the end -> dark
|
||||
// In power-down the input buffer of the floating pin is disabled by hardware,
|
||||
// so the slowly falling voltage causes no shoot-through current.
|
||||
bool isDark(int LED_N, int LED_P)
|
||||
{
|
||||
// Charge the LED junction capacitance.
|
||||
pinMode(LED_N, OUTPUT);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_N, HIGH);
|
||||
digitalWrite(LED_P, LOW);
|
||||
|
||||
// Let the N-side float (no pullup) and measure bleed-down time.
|
||||
pinMode(LED_N, INPUT);
|
||||
digitalWrite(LED_N, LOW);
|
||||
|
||||
bool dark = true;
|
||||
for (uint8_t k = 0; k < darkSteps; k++) {
|
||||
sleepWdt(0); // ~16 ms
|
||||
if (digitalRead(LED_N) == LOW) {
|
||||
dark = false; // bright: stop early
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Clean up after sensing: both LED pins low, caller releases them.
|
||||
pinMode(LED_N, OUTPUT);
|
||||
digitalWrite(LED_N, LOW);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_P, LOW);
|
||||
|
||||
return dark;
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Morse helpers
|
||||
// ===========================================================================
|
||||
void dit(int LED_P)
|
||||
{
|
||||
digitalWrite(LED_P, HIGH);
|
||||
waitUnits(1);
|
||||
digitalWrite(LED_P, LOW);
|
||||
waitUnits(1);
|
||||
}
|
||||
|
||||
void dah(int LED_P)
|
||||
{
|
||||
digitalWrite(LED_P, HIGH);
|
||||
waitUnits(3);
|
||||
digitalWrite(LED_P, LOW);
|
||||
waitUnits(1);
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Morse sender
|
||||
// ===========================================================================
|
||||
void morse(int LED_N, int LED_P)
|
||||
{
|
||||
pinMode(LED_N, OUTPUT);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_N, LOW);
|
||||
digitalWrite(LED_P, LOW);
|
||||
|
||||
const size_t len = strlen_P(morseText);
|
||||
|
||||
for (size_t i = 0; i < len; i++) {
|
||||
char c = (char)pgm_read_byte(&morseText[i]);
|
||||
|
||||
// Allow lowercase source text without silently breaking timing.
|
||||
if (c >= 'a' && c <= 'z') {
|
||||
c = c - 'a' + 'A';
|
||||
}
|
||||
|
||||
bool symbolSent = false;
|
||||
|
||||
switch (c)
|
||||
{
|
||||
// ----- Letters -----
|
||||
case 'A': dit(LED_P); dah(LED_P); symbolSent = true; break; // .-
|
||||
case 'B': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // -...
|
||||
case 'C': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // -.-.
|
||||
case 'D': dah(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // -..
|
||||
case 'E': dit(LED_P); symbolSent = true; break; // .
|
||||
case 'F': dit(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // ..-.
|
||||
case 'G': dah(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // --.
|
||||
case 'H': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // ....
|
||||
case 'I': dit(LED_P); dit(LED_P); symbolSent = true; break; // ..
|
||||
case 'J': dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // .---
|
||||
case 'K': dah(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // -.-
|
||||
case 'L': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // .-..
|
||||
case 'M': dah(LED_P); dah(LED_P); symbolSent = true; break; // --
|
||||
case 'N': dah(LED_P); dit(LED_P); symbolSent = true; break; // -.
|
||||
case 'O': dah(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // ---
|
||||
case 'P': dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .--.
|
||||
case 'Q': dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // --.-
|
||||
case 'R': dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .-.
|
||||
case 'S': dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // ...
|
||||
case 'T': dah(LED_P); symbolSent = true; break; // -
|
||||
case 'U': dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // ..-
|
||||
case 'V': dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // ...-
|
||||
case 'W': dit(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // .--
|
||||
case 'X': dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // -..-
|
||||
case 'Y': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // -.--
|
||||
case 'Z': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // --..
|
||||
|
||||
// ----- Digits -----
|
||||
case '1': dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // .----
|
||||
case '2': dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // ..---
|
||||
case '3': dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // ...--
|
||||
case '4': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // ....-
|
||||
case '5': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // .....
|
||||
case '6': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // -....
|
||||
case '7': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // --...
|
||||
case '8': dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // ---..
|
||||
case '9': dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // ----.
|
||||
case '0': dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // -----
|
||||
|
||||
// ----- Punctuation & Specials -----
|
||||
case '.': dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // .-.-.-
|
||||
case ',': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // --..--
|
||||
case '?': dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // ..--..
|
||||
case '!': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); symbolSent = true; break; // -.-.--
|
||||
case ':': dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // ---...
|
||||
case ';': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // -.-.-.
|
||||
case '(': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // -.--.
|
||||
case ')': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // -.--.-
|
||||
case '"': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .-..-.
|
||||
case '@': dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .--.-.
|
||||
case '&': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); symbolSent = true; break; // .-...
|
||||
case '-': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // -....-
|
||||
case '/': dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // -..-.
|
||||
case '\'': dit(LED_P); dah(LED_P); dah(LED_P);dah(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .----.
|
||||
case '+': dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); symbolSent = true; break; // .-.-.
|
||||
case '=': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // -...-
|
||||
case '_': dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); symbolSent = true; break; // ..--.-
|
||||
|
||||
// Space handling:
|
||||
// Previous symbol already ended with 1 unit OFF and then received the
|
||||
// normal 2 unit character gap. Add 4 units here -> total word gap 7 units.
|
||||
case ' ':
|
||||
waitUnits(4);
|
||||
break;
|
||||
|
||||
// Unsupported chars are ignored without adding an artificial gap.
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
// Inter-character gap: 3 units total.
|
||||
// dit()/dah() already trail 1 unit OFF, so add the remaining 2 units.
|
||||
if (symbolSent) {
|
||||
waitUnits(2);
|
||||
}
|
||||
}
|
||||
|
||||
digitalWrite(LED_P, LOW);
|
||||
digitalWrite(LED_N, LOW);
|
||||
}
|
||||
@@ -183,8 +183,8 @@
|
||||
// theoretical you can use up to 3 LED. For example you can use it for a
|
||||
// landmark beacon. So if you point this LEDs to different directions you can
|
||||
// detect the position in dependence of your location to the bacon.
|
||||
#define LED1_N_SIDE 4
|
||||
#define LED1_P_SIDE 3
|
||||
#define LED1_N_SIDE 3
|
||||
#define LED1_P_SIDE 4
|
||||
|
||||
// ===========================================================================
|
||||
// Variables
|
||||
|
||||
@@ -0,0 +1,311 @@
|
||||
/*
|
||||
=============================================================================
|
||||
FireFly Morse Throwie
|
||||
- a light controlled (LED as Sensor) morse blinker throwie with ATTiny85
|
||||
=============================================================================
|
||||
|
||||
Project definitions, sources
|
||||
-----------------------------------------------------------------------------
|
||||
Version: 0.2 - ATTiny85, 1 MHz, BOD fuse disabled
|
||||
gitea : https://gitea.togo-lab.io/tgohle/0001-FireFly
|
||||
Date : 2026-06-13
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
Inspired by Karl Lunt's FireFly project:
|
||||
http://www.seanet.com/~karllunt/fireflyLED.html
|
||||
|
||||
Morse code reference:
|
||||
'A', ".-" 'B', "-..." 'C', "-.-."
|
||||
'D', "-.." 'E', "." 'F', "..-."
|
||||
'G', "--." 'H', "...." 'I', ".."
|
||||
'J', ".---" 'K', "-.-" 'L', ".-.."
|
||||
'M', "--" 'N', "-." 'O', "---"
|
||||
'P', ".--." 'Q', "--.-" 'R', ".-."
|
||||
'S', "..." 'T', "-" 'U', "..-"
|
||||
'V', "...-" 'W', ".--" 'X', "-..-"
|
||||
'Y', "-.--" 'Z', "--.."
|
||||
|
||||
'1', ".----" '2', "..---" '3', "...--"
|
||||
'4', "....-" '5', "....." '6', "-...."
|
||||
'7', "--..." '8', "---.." '9', "----."
|
||||
'0', "-----"
|
||||
|
||||
'.', ".-.-.-" ',', "--..--" '?', "..--.."
|
||||
'!', "-.-.--" ':', "---..." ';', "-.-.-."
|
||||
'(', "-.--." ')', "-.--.-" '"', ".-..-."
|
||||
'@', ".--.-." '&', ".-..."
|
||||
|
||||
Legal stuff / Copyright:
|
||||
License_-_CC_BY-NC_4.0
|
||||
https://creativecommons.org/licenses/by-nc/4.0/
|
||||
-----------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include <avr/sleep.h>
|
||||
#include <avr/wdt.h>
|
||||
#include <avr/pgmspace.h> // FIX 3: needed for PROGMEM / pgm_read_byte
|
||||
|
||||
#ifndef cbi
|
||||
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
|
||||
#endif
|
||||
#ifndef sbi
|
||||
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
|
||||
#endif
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Timing: unit length in ms.
|
||||
// At 1 MHz, delay() is accurate when F_CPU=1000000L is set in boards.txt.
|
||||
// 100 ms gives readable optical Morse; raise to 150 if readability is poor.
|
||||
#define unitLength 100
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// LED pin definitions (N-side = cathode, P-side = anode for sensing/driving)
|
||||
#define LED1_N_SIDE 3
|
||||
#define LED1_P_SIDE 4
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// ATTiny85 has 512 bytes SRAM; this frees all of it for the stack.
|
||||
// Only uppercase letters, digits, and the special chars in the switch below.
|
||||
// Test only: 20 x "0" due 0 = "-----" most energy draining
|
||||
const char morseText[] PROGMEM = "0000000000000000000";
|
||||
// Ruler: 0...0....1...1....2 Attention: more Text
|
||||
// Ruler: 1...5....0...5....0 will cost more power!
|
||||
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Darkness threshold.
|
||||
// Higher value = triggers in brighter conditions.
|
||||
// Best calibrated at actual dusk/dawn with the chosen LED type.
|
||||
unsigned int darknessThreshold = 17000;
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Watchdog interrupt flag — volatile because it is written in an ISR
|
||||
volatile boolean f_wdt = 1;
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Forward declarations
|
||||
void setup_watchdog(int ii);
|
||||
void system_sleep();
|
||||
unsigned int sensDarkness(int LED_N, int LED_P);
|
||||
void morse(int LED_N, int LED_P);
|
||||
void dit(int LED_P);
|
||||
void dah(int LED_P);
|
||||
|
||||
// ===========================================================================
|
||||
// Setup
|
||||
// ===========================================================================
|
||||
void setup()
|
||||
{
|
||||
// Disable unused peripherals immediately to save some µ/mA.
|
||||
// PRTIM1, PRUSI: genuinely unused, safe to gate off
|
||||
// PRADC: controlled manually around sensDarkness()
|
||||
// PRTIM0: must stay ON — delay() and millis() depend on Timer0
|
||||
PRR = (1 << PRTIM1) | (1 << PRUSI) | (1 << PRADC);
|
||||
|
||||
// ADC is gated via PRR above; also clear ADEN just in case
|
||||
cbi(ADCSRA, ADEN);
|
||||
|
||||
setup_watchdog(9); // 8-second watchdog interval
|
||||
// simple repeat if more delay is need, eg 4
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Main loop
|
||||
// ===========================================================================
|
||||
void loop()
|
||||
{
|
||||
if (f_wdt == 1) {
|
||||
f_wdt = 0;
|
||||
|
||||
// Enable ADC only for the sensing window, then shut it off again.
|
||||
cbi(PRR, PRADC); // un-gate ADC clock
|
||||
sbi(ADCSRA, ADEN); // power ADC on
|
||||
|
||||
if (sensDarkness(LED1_N_SIDE, LED1_P_SIDE) > darknessThreshold) {
|
||||
morse(LED1_N_SIDE, LED1_P_SIDE);
|
||||
}
|
||||
|
||||
cbi(ADCSRA, ADEN); // ADC off
|
||||
sbi(PRR, PRADC); // re-gate ADC clock
|
||||
|
||||
// Return LED pins to input (high-Z) before sleeping
|
||||
pinMode(LED1_N_SIDE, INPUT);
|
||||
pinMode(LED1_P_SIDE, INPUT);
|
||||
}
|
||||
|
||||
// sleep 4 x 8 s = ~32 s between activations
|
||||
for (uint8_t i = 0; i < 1; i++) {
|
||||
system_sleep();
|
||||
}
|
||||
// f_wdt is set to 1 by the WDT ISR when the 8 s expire; no manual clear needed here.
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Sleep helpers
|
||||
// ===========================================================================
|
||||
|
||||
void system_sleep()
|
||||
{
|
||||
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
|
||||
sleep_enable();
|
||||
sleep_mode(); // CPU halts here until WDT fires
|
||||
sleep_disable();
|
||||
// ADC stays off - re-enable it in loop() only when sensing
|
||||
}
|
||||
|
||||
// Watchdog setup - ii selects timeout:
|
||||
// 0=16ms 1=32ms 2=64ms 3=128ms 4=250ms 5=500ms
|
||||
// 6=1s 7=2s 8=4s 9=8s
|
||||
void setup_watchdog(int ii)
|
||||
{
|
||||
byte bb;
|
||||
if (ii > 9) ii = 9;
|
||||
bb = ii & 7;
|
||||
if (ii > 7) bb |= (1 << 5);
|
||||
bb |= (1 << WDCE);
|
||||
|
||||
MCUSR &= ~(1 << WDRF);
|
||||
WDTCR |= (1 << WDCE) | (1 << WDE); // timed sequence - must not be split
|
||||
WDTCR = bb;
|
||||
WDTCR |= _BV(WDIE);
|
||||
}
|
||||
|
||||
ISR(WDT_vect)
|
||||
{
|
||||
f_wdt = 1;
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Light sensor
|
||||
// ===========================================================================
|
||||
// Returns a "darkness level": higher = darker.
|
||||
// Charges the LED junction capacitor, then times how long it takes to bleed
|
||||
// back through the reverse-biased diode to a logic LOW.
|
||||
// ~30000 = pitch black, ~0 = bright light
|
||||
|
||||
// return type is unsigned int (counter can reach 30000, fits in 16 bits)
|
||||
unsigned int sensDarkness(int LED_N, int LED_P)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
// Charge the LED (forward-bias momentarily)
|
||||
pinMode(LED_N, OUTPUT);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_N, HIGH);
|
||||
digitalWrite(LED_P, LOW);
|
||||
|
||||
// Let the N-end float and measure bleed-down time
|
||||
pinMode(LED_N, INPUT);
|
||||
digitalWrite(LED_N, LOW); // disable internal pull-up
|
||||
|
||||
for (i = 0; i < 30000; i++) {
|
||||
if (digitalRead(LED_N) == 0) break;
|
||||
}
|
||||
|
||||
// clean up after sensing
|
||||
pinMode(LED_N, OUTPUT);
|
||||
digitalWrite(LED_N, LOW);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_P, LOW);
|
||||
return i;
|
||||
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Morse helpers
|
||||
// ===========================================================================
|
||||
|
||||
void dit(int LED_P)
|
||||
{
|
||||
digitalWrite(LED_P, HIGH); delay(unitLength);
|
||||
digitalWrite(LED_P, LOW); delay(unitLength);
|
||||
}
|
||||
|
||||
void dah(int LED_P)
|
||||
{
|
||||
digitalWrite(LED_P, HIGH); delay(unitLength * 3);
|
||||
digitalWrite(LED_P, LOW); delay(unitLength);
|
||||
}
|
||||
|
||||
// ===========================================================================
|
||||
// Morse sender
|
||||
// ===========================================================================
|
||||
void morse(int LED_N, int LED_P)
|
||||
{
|
||||
pinMode(LED_N, OUTPUT);
|
||||
pinMode(LED_P, OUTPUT);
|
||||
digitalWrite(LED_N, LOW);
|
||||
|
||||
// read each character from flash with pgm_read_byte()
|
||||
// use < morseText length, not <= (avoids reading past the null terminator)
|
||||
uint8_t len = strlen_P(morseText);
|
||||
for (uint8_t i = 0; i < len; i++)
|
||||
{
|
||||
char c = (char)pgm_read_byte(&morseText[i]);
|
||||
|
||||
switch (c)
|
||||
{
|
||||
// ----- Letters -----
|
||||
case 'A': dit(LED_P); dah(LED_P); break; // .-
|
||||
case 'B': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // -...
|
||||
case 'C': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); break; // -.-.
|
||||
case 'D': dah(LED_P); dit(LED_P); dit(LED_P); break; // -..
|
||||
case 'E': dit(LED_P); break; // .
|
||||
case 'F': dit(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); break; // ..-.
|
||||
case 'G': dah(LED_P); dah(LED_P); dit(LED_P); break; // --.
|
||||
case 'H': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // ....
|
||||
case 'I': dit(LED_P); dit(LED_P); break; // ..
|
||||
case 'J': dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); break; // .---
|
||||
case 'K': dah(LED_P); dit(LED_P); dah(LED_P); break; // -.-
|
||||
case 'L': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); break; // .-..
|
||||
case 'M': dah(LED_P); dah(LED_P); break; // --
|
||||
case 'N': dah(LED_P); dit(LED_P); break; // -.
|
||||
case 'O': dah(LED_P); dah(LED_P); dah(LED_P); break; // ---
|
||||
case 'P': dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); break; // .--.
|
||||
case 'Q': dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); break; // --.-
|
||||
case 'R': dit(LED_P); dah(LED_P); dit(LED_P); break; // .-.
|
||||
case 'S': dit(LED_P); dit(LED_P); dit(LED_P); break; // ...
|
||||
case 'T': dah(LED_P); break; // -
|
||||
case 'U': dit(LED_P); dit(LED_P); dah(LED_P); break; // ..-
|
||||
case 'V': dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); break; // ...-
|
||||
case 'W': dit(LED_P); dah(LED_P); dah(LED_P); break; // .--
|
||||
case 'X': dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); break; // -..-
|
||||
case 'Y': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); break; // -.--
|
||||
case 'Z': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); break; // --..
|
||||
|
||||
// ----- Digits -----
|
||||
case '1': dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); break; // .----
|
||||
case '2': dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); break; // ..---
|
||||
case '3': dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); break; // ...--
|
||||
case '4': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); break; // ....-
|
||||
case '5': dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // .....
|
||||
case '6': dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // -....
|
||||
case '7': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // --...
|
||||
case '8': dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); break; // ---.
|
||||
case '9': dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); break; // ----.
|
||||
case '0': dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); dah(LED_P); break; // -----
|
||||
|
||||
// ----- Punctuation -----
|
||||
case ' ': delay(unitLength * 5); break; // word gap (5 + 3 = 8 units total)
|
||||
case '.': dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); break; // .-.-.-
|
||||
case ',': dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); break; // --..--
|
||||
case '?': dit(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); break; // ..--..
|
||||
case '!': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); break; // -.-.--
|
||||
case ':': dah(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // ---...
|
||||
case ';': dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); break; // -.-.-.
|
||||
case '(': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); break; // -.--.
|
||||
case ')': dah(LED_P); dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); break; // -.--.-
|
||||
case '"': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); break; // .-..-.
|
||||
case '@': dit(LED_P); dah(LED_P); dah(LED_P); dit(LED_P); dah(LED_P); dit(LED_P); break; // .--.-.
|
||||
case '&': dit(LED_P); dah(LED_P); dit(LED_P); dit(LED_P); dit(LED_P); break; // .-...
|
||||
}
|
||||
|
||||
// Inter-character gap: 3 units (the dit/dah functions already trail 1 unit,
|
||||
// so this adds the remaining 2 to reach the standard 3-unit gap).
|
||||
// Space case already handles word gap - no extra delay needed there.
|
||||
if (c != ' ') {
|
||||
delay(unitLength * 2);
|
||||
}
|
||||
}
|
||||
}
|
||||
Submodule
+1
Submodule hardware/0001_FireFly-Solar/.history added at 1c8d4d7c5c.
BIN
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BIN
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BIN
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BIN
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BIN
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BIN
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BIN
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BIN
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BIN
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@@ -0,0 +1,5 @@
|
||||
(version 1)
|
||||
(rule Minimum_text_height_and_thickness_1
|
||||
(constraint text_height (min 0.6mm))
|
||||
(constraint text_thickness (min 0.1mm))
|
||||
)
|
||||
File diff suppressed because it is too large.
Load diff
Binary file not shown.
@@ -0,0 +1,127 @@
|
||||
{
|
||||
"board": {
|
||||
"active_layer": 0,
|
||||
"active_layer_preset": "",
|
||||
"auto_track_width": true,
|
||||
"hidden_netclasses": [],
|
||||
"hidden_nets": [],
|
||||
"high_contrast_mode": 0,
|
||||
"net_color_mode": 1,
|
||||
"opacity": {
|
||||
"images": 0.6,
|
||||
"pads": 1.0,
|
||||
"shapes": 1.0,
|
||||
"tracks": 1.0,
|
||||
"vias": 1.0,
|
||||
"zones": 0.6
|
||||
},
|
||||
"prototype_zone_fills": false,
|
||||
"selection_filter": {
|
||||
"dimensions": true,
|
||||
"footprints": true,
|
||||
"graphics": true,
|
||||
"keepouts": true,
|
||||
"lockedItems": false,
|
||||
"otherItems": true,
|
||||
"pads": true,
|
||||
"text": true,
|
||||
"tracks": true,
|
||||
"vias": true,
|
||||
"zones": true
|
||||
},
|
||||
"visible_items": [
|
||||
"vias",
|
||||
"footprint_text",
|
||||
"footprint_anchors",
|
||||
"ratsnest",
|
||||
"grid",
|
||||
"footprints_front",
|
||||
"footprints_back",
|
||||
"footprint_values",
|
||||
"footprint_references",
|
||||
"tracks",
|
||||
"drc_errors",
|
||||
"drawing_sheet",
|
||||
"bitmaps",
|
||||
"pads",
|
||||
"zones",
|
||||
"drc_warnings",
|
||||
"drc_exclusions",
|
||||
"locked_item_shadows",
|
||||
"conflict_shadows",
|
||||
"shapes",
|
||||
"board_outline_area",
|
||||
"ly_points"
|
||||
],
|
||||
"visible_layers": "ffffffff_ffffffff_ffffffff_ffffffff",
|
||||
"zone_display_mode": 0
|
||||
},
|
||||
"git": {
|
||||
"integration_disabled": false,
|
||||
"repo_type": "",
|
||||
"repo_username": "",
|
||||
"ssh_key": ""
|
||||
},
|
||||
"meta": {
|
||||
"filename": "0001_FireFly-Solar.kicad_prl",
|
||||
"version": 5
|
||||
},
|
||||
"net_inspector_panel": {
|
||||
"col_hidden": [
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false,
|
||||
false
|
||||
],
|
||||
"col_order": [
|
||||
0,
|
||||
1,
|
||||
2,
|
||||
3,
|
||||
4,
|
||||
5,
|
||||
6,
|
||||
7,
|
||||
8,
|
||||
9
|
||||
],
|
||||
"col_widths": [],
|
||||
"custom_group_rules": [],
|
||||
"expanded_rows": [],
|
||||
"filter_by_net_name": true,
|
||||
"filter_by_netclass": true,
|
||||
"filter_text": "",
|
||||
"group_by_constraint": false,
|
||||
"group_by_netclass": false,
|
||||
"show_time_domain_details": false,
|
||||
"show_unconnected_nets": false,
|
||||
"show_zero_pad_nets": false,
|
||||
"sort_ascending": true,
|
||||
"sorting_column": -1
|
||||
},
|
||||
"open_jobsets": [],
|
||||
"project": {
|
||||
"files": []
|
||||
},
|
||||
"schematic": {
|
||||
"hierarchy_collapsed": [],
|
||||
"selection_filter": {
|
||||
"graphics": true,
|
||||
"images": true,
|
||||
"labels": true,
|
||||
"lockedItems": false,
|
||||
"otherItems": true,
|
||||
"pins": true,
|
||||
"ruleAreas": true,
|
||||
"symbols": true,
|
||||
"text": true,
|
||||
"wires": true
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,807 @@
|
||||
{
|
||||
"board": {
|
||||
"3dviewports": [],
|
||||
"design_settings": {
|
||||
"defaults": {
|
||||
"apply_defaults_to_fp_barcodes": false,
|
||||
"apply_defaults_to_fp_dimensions": false,
|
||||
"apply_defaults_to_fp_fields": false,
|
||||
"apply_defaults_to_fp_shapes": false,
|
||||
"apply_defaults_to_fp_text": false,
|
||||
"board_outline_line_width": 0.05,
|
||||
"copper_line_width": 0.2,
|
||||
"copper_text_italic": false,
|
||||
"copper_text_size_h": 1.5,
|
||||
"copper_text_size_v": 1.5,
|
||||
"copper_text_thickness": 0.3,
|
||||
"copper_text_upright": false,
|
||||
"courtyard_line_width": 0.05,
|
||||
"dimension_precision": 4,
|
||||
"dimension_units": 3,
|
||||
"dimensions": {
|
||||
"arrow_length": 1270000,
|
||||
"extension_offset": 500000,
|
||||
"keep_text_aligned": true,
|
||||
"suppress_zeroes": true,
|
||||
"text_position": 0,
|
||||
"units_format": 0
|
||||
},
|
||||
"fab_line_width": 0.1,
|
||||
"fab_text_italic": false,
|
||||
"fab_text_size_h": 1.0,
|
||||
"fab_text_size_v": 1.0,
|
||||
"fab_text_thickness": 0.15,
|
||||
"fab_text_upright": false,
|
||||
"other_line_width": 0.1,
|
||||
"other_text_italic": false,
|
||||
"other_text_size_h": 1.0,
|
||||
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File diff suppressed because it is too large.
Load diff
File diff suppressed because it is too large.
Load diff
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*
|
||||
|
||||
.subckt 0001_FireFly-Solar
|
||||
|
||||
|
||||
J2 __J2
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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|
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|
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|
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|
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R2 Net-_U2-XTAL1/PB3_ Net-_D6-K_ R
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Load diff
File diff suppressed because it is too large.
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1,
|
||||
0,
|
||||
0,
|
||||
1,
|
||||
0,
|
||||
2,
|
||||
0,
|
||||
0,
|
||||
2
|
||||
],
|
||||
[
|
||||
0,
|
||||
2,
|
||||
1,
|
||||
1,
|
||||
0,
|
||||
0,
|
||||
1,
|
||||
0,
|
||||
2,
|
||||
0,
|
||||
0,
|
||||
2
|
||||
],
|
||||
[
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
2
|
||||
]
|
||||
],
|
||||
"rule_severities": {
|
||||
"bus_definition_conflict": "error",
|
||||
"bus_entry_needed": "error",
|
||||
"bus_to_bus_conflict": "error",
|
||||
"bus_to_net_conflict": "error",
|
||||
"conflicting_netclasses": "error",
|
||||
"different_unit_footprint": "error",
|
||||
"different_unit_net": "error",
|
||||
"duplicate_reference": "error",
|
||||
"duplicate_sheet_names": "error",
|
||||
"endpoint_off_grid": "warning",
|
||||
"extra_units": "error",
|
||||
"global_label_dangling": "warning",
|
||||
"hier_label_mismatch": "error",
|
||||
"label_dangling": "error",
|
||||
"lib_symbol_issues": "warning",
|
||||
"missing_bidi_pin": "warning",
|
||||
"missing_input_pin": "warning",
|
||||
"missing_power_pin": "error",
|
||||
"missing_unit": "warning",
|
||||
"multiple_net_names": "warning",
|
||||
"net_not_bus_member": "warning",
|
||||
"no_connect_connected": "warning",
|
||||
"no_connect_dangling": "warning",
|
||||
"pin_not_connected": "error",
|
||||
"pin_not_driven": "error",
|
||||
"pin_to_pin": "warning",
|
||||
"power_pin_not_driven": "error",
|
||||
"similar_labels": "warning",
|
||||
"simulation_model_issue": "ignore",
|
||||
"unannotated": "error",
|
||||
"unit_value_mismatch": "error",
|
||||
"unresolved_variable": "error",
|
||||
"wire_dangling": "error"
|
||||
}
|
||||
},
|
||||
"libraries": {
|
||||
"pinned_footprint_libs": [],
|
||||
"pinned_symbol_libs": []
|
||||
},
|
||||
"meta": {
|
||||
"filename": "0001-FireFly.kicad_pro",
|
||||
"version": 1
|
||||
},
|
||||
"net_settings": {
|
||||
"classes": [
|
||||
{
|
||||
"bus_width": 12,
|
||||
"clearance": 0.2,
|
||||
"diff_pair_gap": 0.25,
|
||||
"diff_pair_via_gap": 0.25,
|
||||
"diff_pair_width": 0.2,
|
||||
"line_style": 0,
|
||||
"microvia_diameter": 0.3,
|
||||
"microvia_drill": 0.1,
|
||||
"name": "Default",
|
||||
"pcb_color": "rgba(0, 0, 0, 0.000)",
|
||||
"schematic_color": "rgba(0, 0, 0, 0.000)",
|
||||
"track_width": 0.2,
|
||||
"via_diameter": 0.6,
|
||||
"via_drill": 0.3,
|
||||
"wire_width": 6
|
||||
}
|
||||
],
|
||||
"meta": {
|
||||
"version": 3
|
||||
},
|
||||
"net_colors": null,
|
||||
"netclass_assignments": null,
|
||||
"netclass_patterns": []
|
||||
},
|
||||
"pcbnew": {
|
||||
"last_paths": {
|
||||
"gencad": "",
|
||||
"idf": "",
|
||||
"netlist": "",
|
||||
"plot": "",
|
||||
"pos_files": "",
|
||||
"specctra_dsn": "",
|
||||
"step": "",
|
||||
"svg": "",
|
||||
"vrml": ""
|
||||
},
|
||||
"page_layout_descr_file": ""
|
||||
},
|
||||
"schematic": {
|
||||
"annotate_start_num": 0,
|
||||
"bom_export_filename": "",
|
||||
"bom_fmt_presets": [],
|
||||
"bom_fmt_settings": {
|
||||
"field_delimiter": ",",
|
||||
"keep_line_breaks": false,
|
||||
"keep_tabs": false,
|
||||
"name": "CSV",
|
||||
"ref_delimiter": ",",
|
||||
"ref_range_delimiter": "",
|
||||
"string_delimiter": "\""
|
||||
},
|
||||
"bom_presets": [],
|
||||
"bom_settings": {
|
||||
"exclude_dnp": false,
|
||||
"fields_ordered": [
|
||||
{
|
||||
"group_by": false,
|
||||
"label": "Reference",
|
||||
"name": "Reference",
|
||||
"show": true
|
||||
},
|
||||
{
|
||||
"group_by": true,
|
||||
"label": "Value",
|
||||
"name": "Value",
|
||||
"show": true
|
||||
},
|
||||
{
|
||||
"group_by": false,
|
||||
"label": "Datasheet",
|
||||
"name": "Datasheet",
|
||||
"show": true
|
||||
},
|
||||
{
|
||||
"group_by": false,
|
||||
"label": "Footprint",
|
||||
"name": "Footprint",
|
||||
"show": true
|
||||
},
|
||||
{
|
||||
"group_by": false,
|
||||
"label": "Qty",
|
||||
"name": "${QUANTITY}",
|
||||
"show": true
|
||||
},
|
||||
{
|
||||
"group_by": true,
|
||||
"label": "DNP",
|
||||
"name": "${DNP}",
|
||||
"show": true
|
||||
}
|
||||
],
|
||||
"filter_string": "",
|
||||
"group_symbols": true,
|
||||
"name": "Grouped By Value",
|
||||
"sort_asc": true,
|
||||
"sort_field": "Reference"
|
||||
},
|
||||
"connection_grid_size": 50.0,
|
||||
"drawing": {
|
||||
"dashed_lines_dash_length_ratio": 12.0,
|
||||
"dashed_lines_gap_length_ratio": 3.0,
|
||||
"default_line_thickness": 6.0,
|
||||
"default_text_size": 50.0,
|
||||
"field_names": [],
|
||||
"intersheets_ref_own_page": false,
|
||||
"intersheets_ref_prefix": "",
|
||||
"intersheets_ref_short": false,
|
||||
"intersheets_ref_show": false,
|
||||
"intersheets_ref_suffix": "",
|
||||
"junction_size_choice": 3,
|
||||
"label_size_ratio": 0.375,
|
||||
"operating_point_overlay_i_precision": 3,
|
||||
"operating_point_overlay_i_range": "~A",
|
||||
"operating_point_overlay_v_precision": 3,
|
||||
"operating_point_overlay_v_range": "~V",
|
||||
"overbar_offset_ratio": 1.23,
|
||||
"pin_symbol_size": 25.0,
|
||||
"text_offset_ratio": 0.15
|
||||
},
|
||||
"legacy_lib_dir": "",
|
||||
"legacy_lib_list": [],
|
||||
"meta": {
|
||||
"version": 1
|
||||
},
|
||||
"net_format_name": "",
|
||||
"page_layout_descr_file": "",
|
||||
"plot_directory": "",
|
||||
"spice_current_sheet_as_root": false,
|
||||
"spice_external_command": "spice \"%I\"",
|
||||
"spice_model_current_sheet_as_root": true,
|
||||
"spice_save_all_currents": false,
|
||||
"spice_save_all_dissipations": false,
|
||||
"spice_save_all_voltages": false,
|
||||
"subpart_first_id": 65,
|
||||
"subpart_id_separator": 0
|
||||
},
|
||||
"sheets": [
|
||||
[
|
||||
"f227a2cd-5cbd-41a5-87f8-a5c1515170aa",
|
||||
"Root"
|
||||
]
|
||||
],
|
||||
"text_variables": {}
|
||||
}
|
||||
@@ -1,21 +0,0 @@
|
||||
(kicad_sch
|
||||
(version 20231120)
|
||||
(generator "eeschema")
|
||||
(generator_version "8.0")
|
||||
(uuid "f227a2cd-5cbd-41a5-87f8-a5c1515170aa")
|
||||
(paper "A4")
|
||||
(title_block
|
||||
(title "ToGo Lab FireFly Morse Throwie")
|
||||
(rev "#001")
|
||||
(company "ToGo-Lab")
|
||||
(comment 1 "- https://togo-lab.io/")
|
||||
(comment 2 "- Email: tgohle@togo-lab.io")
|
||||
(comment 3 "Thomas Gohle")
|
||||
)
|
||||
(lib_symbols)
|
||||
(sheet_instances
|
||||
(path "/"
|
||||
(page "1")
|
||||
)
|
||||
)
|
||||
)
|
||||
Reference in new issue
Block a user