1-led_on_c.zip_读写串口

/* main.c */ #define GPC0CON *((volatile unsigned int *)0xE0200060) #define GPC0DAT *((volatile unsigned int *)0xE0200064) void delay(volatile unsigned int t) { volatile unsigned int t2 = 0xFFFF; while (t--) for (; t2; t2--); } int main() { int toggle = 0; GPC0CON &= ~(0xFF << 12); GPC0CON |= 0x11 << 12; // 配置GPC0_3和GPC0_4为输出 while (1) { GPC0DAT &= ~(0x3 << 3); // 熄灭LED1和LED2 if (toggle) GPC0DAT |= 1 << 3; // 点亮LED1 else GPC0DAT |= 1 << 4; // 点亮LED2 toggle = !toggle; delay(0x50000); } return 0; }