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| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2019-10-19 14:36:42 +0200 |
|---|---|---|
| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2019-10-19 14:36:42 +0200 |
| commit | bf92e6739056e3a4b46a0febbddd860d32096d81 (patch) | |
| tree | 3b3f482c253b1b7b4f973c790294e926d24b83dc /sw/main.cpp | |
| parent | f88680cdfd045ebc2e4c1bf2a25b32e14123b6fc (diff) | |
| download | glutte-batteries-bf92e6739056e3a4b46a0febbddd860d32096d81.tar.gz glutte-batteries-bf92e6739056e3a4b46a0febbddd860d32096d81.tar.bz2 glutte-batteries-bf92e6739056e3a4b46a0febbddd860d32096d81.zip | |
Add watchdog
Diffstat (limited to 'sw/main.cpp')
| -rw-r--r-- | sw/main.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sw/main.cpp b/sw/main.cpp index b364b92..48871ec 100644 --- a/sw/main.cpp +++ b/sw/main.cpp @@ -30,6 +30,7 @@ #include <avr/interrupt.h> #include <avr/sleep.h> #include <avr/eeprom.h> +#include <avr/wdt.h> // Definitions allocation pin #define PIN(x) (1 << x) @@ -97,6 +98,10 @@ uint32_t current_capacity; volatile uint8_t timer_counter; /* Timer in 100ms steps */ volatile uint32_t timer_seconds; /* Timer in seconds */ +/* At reset, save the mcusr register to find out why we got reset. + * Datasheet 11.9.1, example code from wdt.h */ +uint8_t mcusr_mirror __attribute__ ((section (".noinit"))); + ISR(TIMER0_COMPA_vect) { timer_counter++; @@ -162,6 +167,14 @@ static void store_capacity_to_eeprom() int main() { + /* Save the reset source for debugging, then enable the watchdog. + * Attention: WDT may be already enabled if it triggered a reset! + * Datasheet 11.8.2 */ + mcusr_mirror = MCUSR; + MCUSR = 0; + wdt_reset(); + wdt_enable(WDTO_4S); + /* Setup GPIO */ // Active-low outputs must be high PORTB = PINB_STATUSn | PINB_SPI_LTC_CSn; |