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April 21, 2023 02:49
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// ATmega328P watchdog test sketch | |
#include <avr/wdt.h> | |
int inByte = 0; | |
int led = 13; | |
void setup() { | |
wdt_disable(); | |
Serial.begin(115200); | |
Serial.print("ATmega328P watchdog test sketch\r\n"); | |
pinMode(led, OUTPUT); | |
digitalWrite(led, LOW); | |
} | |
void loop() { | |
Serial.print( "Press key to enable watchdog:\r\n" | |
"1: WDTO_15MS\r\n" | |
"2: WDTO_30MS\r\n" | |
"3: WDTO_60MS\r\n" | |
"4: WDTO_120MS\r\n" | |
"5: WDTO_250MS\r\n" | |
"6: WDTO_500MS\r\n" | |
"7: WDTO_1S\r\n" | |
"8: WDTO_2S\r\n" | |
"9: WDTO_4S\r\n" | |
"0: WDTO_8S\r\n" | |
"any other key: jump back to 0x00\r\n\r\n"); | |
while (Serial.available() <= 0) { | |
} | |
inByte = Serial.read(); | |
switch (inByte) { | |
case '1': | |
wdt_enable(WDTO_15MS); | |
break; | |
case '2': | |
wdt_enable(WDTO_30MS); | |
break; | |
case '3': | |
wdt_enable(WDTO_60MS); | |
break; | |
case '4': | |
wdt_enable(WDTO_120MS); | |
break; | |
case '5': | |
wdt_enable(WDTO_250MS); | |
break; | |
case '6': | |
wdt_enable(WDTO_500MS); | |
break; | |
case '7': | |
wdt_enable(WDTO_1S); | |
break; | |
case '8': | |
wdt_enable(WDTO_2S); | |
break; | |
case '9': | |
wdt_enable(WDTO_4S); | |
break; | |
case '0': | |
wdt_enable(WDTO_8S); | |
break; | |
default: | |
Serial.print("Jump to 0x00\r\n\n"); | |
Serial.flush(); | |
asm volatile("jmp 0"); | |
break; | |
} | |
digitalWrite(led, HIGH); | |
while (1) {}; | |
} |
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Optiboot/optiboot#369