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arduino-spybug
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add watchdog

This commit is contained in:
r4 2022-03-27 20:49:46 +02:00
parent fc16966e55
commit e15a9c4b48
1 changed files with 23 additions and 4 deletions
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27
spybug.ino
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@ -11,10 +11,11 @@
SD pin D3 is the chip select pin (must be set manually in pin_ss).
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <SPI.h>
#include <SD.h>
#include <SPI.h>
#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/wdt.h>
static int serial_putch(char c, FILE *f) {
(void)f;
@ -55,7 +56,20 @@ static int printf(const __FlashStringHelper *fmt, ...) {
return ret;
}
#define die(fmt, ...) { cli(); printf(F("Fatal: ")); printf(fmt, ##__VA_ARGS__); Serial.flush(); while(1); }
static void start_watchdog() {
MCUSR &= ~B00001000; /* Clear reset flag. */
WDTCSR |= B00011000; /* Prepare prescaler change. */
WDTCSR = B00100001; /* Set watchdog timeout to 8s. */
// Enable Watchdog Timer
WDTCSR |= B01000000;
MCUSR = MCUSR & B11110111;
}
static inline void disable_recording_interrupts() {
TIMSK1 &= ~(_BV(OCIE1A) | _BV(OCIE1B));
}
#define die(fmt, ...) { disable_recording_interrupts(); printf(F("Fatal: ")); printf(fmt, ##__VA_ARGS__); Serial.flush(); while(1); }
#define dbg(fmt, ...) { printf(F("Debug: ")); printf(fmt, ##__VA_ARGS__); }
enum AdcChannel : uint8_t {
@ -202,6 +216,8 @@ static void wav_write_header(uint32_t nsamples) {
}
void setup() {
// Start Watchdog (wdt_enable() is broken somehow?!)
start_watchdog();
// Serial Setup
Serial.begin(9600); /* Set baud rate. */
setup_serial_in_out(); /* Add printf support. */
@ -217,9 +233,11 @@ void setup() {
} while (SD.exists(filename));
// Delay Triggering
#if defined(RECORDING_DELAY_IN_MINUTES) && RECORDING_DELAY_IN_MINUTES != 0
wdt_disable(); /* Temporarily disable watchdog. */
printf(F("Filename: '%s'.\n"), filename);
printf(F("Waiting %u minute%s before starting to record...\n"), RECORDING_DELAY_IN_MINUTES, RECORDING_DELAY_IN_MINUTES == 1 ? "" : "s");
delay(60000ul * (unsigned long)(RECORDING_DELAY_IN_MINUTES));
start_watchdog(); /* Re-enable watchdog. */
#endif
// Open File
file = SD.open(filename, O_READ | O_WRITE | O_CREAT); /* Seeking doesn't seem to work with FILE_WRITE?! */
@ -255,6 +273,7 @@ void setup() {
void loop() {
delay(1000);
wdt_reset(); /* Reset watchdog timer. */
#ifdef DEBUG_RECORDING
dbg(F("n=%lu\tavg=%lu\tmin=%d\tmax=%d\n"), dbg_total, dbg_sum / (dbg_samples ? dbg_samples : 1), dbg_min, dbg_max);
dbg_sum = 0;