r4/arduino-spybug
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optional serial output + tidying

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r4 2022-04-09 16:33:54 +02:00
parent e15a9c4b48
commit eaa9c9044b
1 changed files with 37 additions and 20 deletions
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57
spybug.ino
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@ -17,6 +17,29 @@
#include <avr/io.h>
#include <avr/wdt.h>
/************************
BEGIN USER CONFIGURATION
************************/
//#define DEBUG_RECORDING
//#define SERIAL_OUTPUT
#define SAMPLE_MODE_U8
//#define SAMPLE_MODE_S16
//#define ADC_PRESCALE_16 /* Up to ~60kHz. */
//#define ADC_PRESCALE_32 /* Up to ~27kHz. */
#define ADC_PRESCALE_64 /* Up to ~18kHz. */
#define RECORDING_DELAY_IN_MINUTES 0 /* Wait n minutes before starting to record. */
#define ADC_CHANNEL AdcChannel0
#define TIMER_COMPARE 1000 /* 16MHz / 1000 = 16kHz. */
#define FLUSH_SAMPLES 64000 /* Flush WAV file every n samples. */
#define PIN_SS 10
/**********************
END USER CONFIGURATION
**********************/
#ifdef SERIAL_OUTPUT
static int serial_putch(char c, FILE *f) {
(void)f;
return Serial.write(c) == 1 ? 0 : 1;
@ -56,6 +79,16 @@ static int printf(const __FlashStringHelper *fmt, ...) {
return ret;
}
#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__); }
#define print_special(x) Serial.print(x)
#else
#define printf(fmt, ...) {}
#define die(fmt, ...) { disable_recording_interrupts(); while(1); }
#define dbg(fmt, ...) {}
#define print_special(x) {}
#endif
static void start_watchdog() {
MCUSR &= ~B00001000; /* Clear reset flag. */
WDTCSR |= B00011000; /* Prepare prescaler change. */
@ -69,9 +102,6 @@ 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 {
AdcChannel0 = 0,
AdcChannel1 = 1,
@ -86,27 +116,12 @@ enum AdcChannel : uint8_t {
AdcChannelGnd = 15,
};
//#define DEBUG_RECORDING
//#define SAMPLE_MODE_U8
#define SAMPLE_MODE_S16
//#define ADC_PRESCALE_16 /* Up to ~60kHz. */
//#define ADC_PRESCALE_32 /* Up to ~27kHz. */
#define ADC_PRESCALE_64 /* Up to ~18kHz. */
#define RECORDING_DELAY_IN_MINUTES 0 /* Wait n minutes before starting to record. */
#define ADC_CHANNEL AdcChannel0
#define TIMER_COMPARE 1000 /* 16MHz / 1000 = 16kHz. */
#define FLUSH_SAMPLES 64000 /* Flush WAV file every n samples. */
#define PIN_SS 10
File file;
#if defined(SAMPLE_MODE_U8)
#define SAMPLE_BUF_SIZE 256
#define SAMPLE_BUF_TYPE uint8_t
#elif defined(SAMPLE_MODE_S16)
#define SAMPLE_BUF_SIZE 138
#define SAMPLE_BUF_SIZE 160
#define SAMPLE_BUF_TYPE int16_t
#endif
volatile SAMPLE_BUF_TYPE sample_buffer[2][SAMPLE_BUF_SIZE];
@ -131,7 +146,7 @@ ISR(TIMER1_COMPA_vect) {
const size_t bufsz = sizeof(SAMPLE_BUF_TYPE) * samples_in_buffer[!which_buffer];
if (file.write((char*)sample_buffer[!which_buffer], bufsz) != bufsz) {
printf(F("Lost "));
Serial.print((float)samples_hanging / (float)(F_CPU / TIMER_COMPARE)); /* Printf doesn't handle floats. */
print_special((float)samples_hanging / (float)(F_CPU / TIMER_COMPARE)); /* Printf doesn't handle floats. */
printf(F(" seconds of recording.\n"));
die(F("Error writing to SD card. You can ignore this if you removed the SD card intentionally.\n"));
}
@ -219,8 +234,10 @@ void setup() {
// Start Watchdog (wdt_enable() is broken somehow?!)
start_watchdog();
// Serial Setup
#ifdef SERIAL_OUTPUT
Serial.begin(9600); /* Set baud rate. */
setup_serial_in_out(); /* Add printf support. */
#endif
// SD Card Setup
if (!SD.begin(PIN_SS))
die(F("Error initializing SD card!\n"));