Cortex-M3 LED 켜기

 

LED 켜기 (PC12)

#define  RCC_AHBENR    (*(volatile unsigned int*)0x40021014)   #define  RCC_APB2ENR    (*(volatile unsigned int*)0x40021018)   #define GPIOC_CRH  (*((volatile unsigned int *)(0x40011004)))  #define GPIOC_ODR  (*((volatile unsigned int *)(0x4001100C)))  #define GPIOC_BSRR  (*((volatile unsigned int *)(0x40011010)))  #define GPIOC_BRR  (*((volatile unsigned int *)(0x40011014)))    unsigned int uiCnt;     RCC_APB2ENR |= (1<<4); //PC의 클럭 인에이블     //RCC_APB2ENR = 0xFFF;     //RCC_AHBENR |= (1<<2) | (1<<6);      GPIOC_CRH = (0x3 << 16);   GPIOC_ODR = (1 << 12);    //GPIOC_BSRR = (1 << 12);    while(1)  {     GPIOC_BSRR = (1 << 12);     for(uiCnt = 0 ; 2000000 > uiCnt; ++uiCnt);                GPIOC_BRR  = (1 << 12);     for(uiCnt = 0 ; 2000000 > uiCnt; ++uiCnt);  }  while(1);  return 0; }