LPC Link2 clearing RAM

ironlionzion — Fri, 15 Sep 2017 14:47:42 GMT

volatile int __attribute__ ((section(".noinit"))) persistentVar; int bssVar; int main(void) { SystemCoreClockUpdate(); InitSysTimer(); // makes the Sleep() function work Chip_GPIO_SetPinDIR(LPC_GPIO, 2, 16, TRUE); // green LED Chip_GPIO_SetPinDIR(LPC_GPIO, 2, 17, TRUE); // red LED Chip_GPIO_SetPinDIR(LPC_GPIO, 2, 18, TRUE); // blue LED Chip_GPIO_SetPinOutHigh(LPC_GPIO, 2, 16); // green LED = off Chip_GPIO_SetPinOutHigh(LPC_GPIO, 2, 17); // green LED = off Chip_GPIO_SetPinOutHigh(LPC_GPIO, 2, 18); // green LED = off if (!(LPC_SYSCTL->SYSRSTSTAT & 0x10)) { // this IS *NOT* a software reset (NVIC_SystemReset()) // it's probably power on (or something lese) // persistentVar is garbage, initialize it to 0 persistentVar = 0; Chip_GPIO_SetPinOutLow(LPC_GPIO, 2, 16); // green LED = on } else { // this IS a software reset (NVIC_SystemReset()) // persistentVar was initialized, keep its value Chip_GPIO_SetPinOutLow(LPC_GPIO, 2, 17); // green LED = on } LPC_SYSCTL->SYSRSTSTAT |= 0x1f; // is this necessary? if (persistentVar == 0) Chip_GPIO_SetPinOutLow(LPC_GPIO, 2, 18); // green LED = on persistentVar++; bssVar++; Sleep(500000); // sleeps 0.5 milliseconds NVIC_SystemReset(); return 0; }

Re: LPC Link2 clearing RAM

Carlos_Mendoza — Mon, 18 Sep 2017 21:48:16 GMT

Hi John,

Could you give us more information on what you are trying to achieve? Which MCU are you using? Are you using MCUXpresso IDE?

Thanks in advance!

Best Regards,
Carlos Mendoza
Technical Support Engineer

LPC MicrocontrollersのトピックLPC Link2 clearing RAM

LPC Link2 clearing RAM

Re: LPC Link2 clearing RAM