X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=blobdiff_plain;f=firmware%2Fmain.c;h=0fbdb1e9f804421fca1a07fe69f33d72bd0890a2;hp=a83884b86f9408101f9bbf3a2bc91fa010b7b1be;hb=a366ae18debc6e73c4946aa6290ed37c49bb1fc0;hpb=29b27abe6adedf08f1067a76c8785cd8fe5d3296

diff --git a/firmware/main.c b/firmware/main.c
index a83884b..0fbdb1e 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -3,6 +3,7 @@
 #include <avr/sleep.h>
 #include <avr/interrupt.h>
 #include <avr/power.h>
+#include <avr/wdt.h>
 
 #include "lights.h"
 
@@ -33,11 +34,14 @@ static void hw_suspend()
 	susp_buttons();
 }
 
-void power_down()
+void power_down(unsigned char err)
 {
 	hw_suspend();
 
 	do {
+		if (err)
+			gpio_set(0, 1);
+
 		// G'night
 		set_sleep_mode(SLEEP_MODE_PWR_DOWN);
 		sleep_enable();
@@ -58,7 +62,18 @@ void power_down()
 
 int main(void)
 {
-	init_log();
+	unsigned char mcusr_save;
+
+	// disable the WDT if running
+	wdt_reset();
+	mcusr_save = MCUSR;
+	MCUSR = 0;
+	wdt_disable();
+
+	if (mcusr_save & _BV(WDRF)) // was watchdog reset?
+		gpio_set(0, 1);
+
+	init_log(mcusr_save);
 
 	power_usi_disable(); // Once for lifetime
 	ACSRA |= _BV(ACD);   // disable analog comparator
@@ -66,7 +81,7 @@ int main(void)
 	log_set_state(3);
 
 	hw_setup();
-	power_down();
+	power_down(mcusr_save & _BV(WDRF));
 
 	sei();
 #if 1