kennug: -DWDT_TRIGGERED

src/Makefile

@@ -74,7 +74,7 @@ lfuse_blink = 0x7a
 # [6]: EESAVE = 0  ! (EEPROM not preserved @ chip erase)
 # [5]: WDTON  = 0  ! (watchdog disabled)
 
-lfuse_kennung = 0x1a
+lfuse_kennung = 0x3a
 lfuse_bate = 0x1a
 
 pMCU-attiny13a = t13

src/kennung.c

@@ -124,13 +124,11 @@ static struct kennung EEMEM eeprom;
 
 static uint8_t phase;
 
-ISR(PCINT0_vect)
+static inline
+void shift_phase()
 {
 	static uint8_t position, index;
 
-	if (!GetPORT(OUT_PORT))
-		return;
-
 	if (++position >= kennung.length) {
 		position = 0;
 		index = 0;
@@ -142,6 +140,21 @@ ISR(PCINT0_vect)
 		phase >>= 1;
 }
 
+ISR(PCINT0_vect)
+{
+	if (!GetPORT(OUT_PORT))
+		return;
+	shift_phase();
+}
+
+#ifdef WDT_TRIGGERED
+ISR(WDT_vect)
+{
+	wdt_reset();
+	shift_phase();
+}
+#endif
+
 static inline
 void init_trig()
 {
@@ -257,6 +270,20 @@ void uart()
 		c |= 0x80;
 }
 
+static inline
+void init_wdt(uint8_t wdt_period)
+{
+#ifdef WDT_TRIGGERED
+        uint8_t cr = Bit(WDTIE) | (wdt_period&7) << WDP0 | (wdt_period&8) << (WDP3-3);
+        __asm__("STS %[CSR], %[CE]"     "\n\t"
+                "STS %[CSR], %[WE]"     "\n"
+                ::[CSR] "n" (&WDTCR),
+                 [CE] "r" (Bit(WDCE) | Bit(WDTIE)),
+                 [WE] "r" (cr)
+                );
+#endif
+}
+
 int main()
 {
 	eeprom_read_block(&kennung, &eeprom, sizeof(kennung));
@@ -265,14 +292,16 @@ int main()
 
 	init_timer();
 	init_trig();
-
+	init_wdt(5);
 	send('x');
 
 	set_sleep_mode(SLEEP_MODE_IDLE);
 	while (1) {
 		sei();
 		sleep_mode();
+#ifndef WDT_TRIGGERED
 		wdt_reset();
+#endif
 		if (!tick)
 			continue;
 		tick = 0;

src/reset_avr.sh

@@ -0,0 +1,9 @@
+#! /bin/bash -v 
+
+echo 17  > /sys/class/gpio/export || exit 1
+sleep 1
+echo out > /sys/class/gpio/gpio17/direction || exit 2 
+echo 0 > /sys/class/gpio/gpio17/value
+sleep 1
+echo 1 > /sys/class/gpio/gpio17/value
+echo 17  > /sys/class/gpio/unexport