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Add EnableWatchdog for auto-reset in ISP

This commit is contained in:
Stefan `Sec` Zehl 2011-05-22 18:42:02 +02:00
parent 0a7920c13f
commit 5b29d9b6f0
1 changed files with 22 additions and 1 deletions
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23
reinvoke_isp.c
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@ -6,7 +6,6 @@
#define set_MSP(x) \ #define set_MSP(x) \
__asm( "msr MSP, %0\n" : : "r" (x) ) __asm( "msr MSP, %0\n" : : "r" (x) )
/* Jump back into bootcode, enable mass storage firmware flashing */ /* Jump back into bootcode, enable mass storage firmware flashing */
void ReinvokeISP(void) { void ReinvokeISP(void) {
@ -50,3 +49,25 @@ void ReinvokeISP(void) {
/* NOTREACHED */ /* NOTREACHED */
} }
void EnableWatchdog(uint32_t ms){
/* Enable WDT clock */
SCB_SYSAHBCLKCTRL |= 0x8000;
SCB_PDRUNCFG &= ~(1);
/* select internal RC */
SCB_WDTCLKSEL = SCB_WDTCLKSEL_SOURCE_INTERNALOSC;
/* enable */
SCB_WDTCLKUEN = 0;
SCB_WDTCLKUEN = 1;
#define INTERNAL_RC_HZ 12000000
WDT_WDTC= ((INTERNAL_RC_HZ/4)/1000) *ms;
SCB_WDTCLKDIV = 1;
WDT_WDMOD = WDT_WDMOD_WDRESET_ENABLED | WDT_WDMOD_WDEN_ENABLED;
// frob watchdog once.
WDT_WDFEED = WDT_WDFEED_FEED1;
WDT_WDFEED = WDT_WDFEED_FEED2;
};