Rainbow-electronics ATmega32L Manual do Utilizador descarregar pdf (Página 41)

100

101

ATmega32(L)

2503C–AVR–10/02

The following code example shows one assembly and one C function for turning off the

WDT. The example assumes that interrupts are controlled (for example by disabling

interrupts globally) so that no interrupts will occur during execution of these functions.

Assembly Code Example

WDT_off:

; Write logical one to WDTOE and WDE

ldi r16, (1<<WDTOE)|(1<<WDE)

out WDTCR, r16

; Turn off WDT

ldi r16, (0<<WDE)

out WDTCR, r16

ret

C Code Example

void WDT_off(void)

{

/* Write logical one to WDTOE and WDE */

WDTCR = (1<<WDTOE) | (1<<WDE);

/* Turn off WDT */

WDTCR = 0x00;

}

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