OK6410串口控制LED

#define ULCON0 (*((volatile unsigned long *)0x7F005000)) #define UCON0 (*((volatile unsigned long *)0x7F005004)) #define UFCON0 (*((volatile unsigned long *)0x7F005008)) #define UMCON0 (*((volatile unsigned long *)0x7F00500C)) #define UTRSTAT0 (*((volatile unsigned long *)0x7F005010)) #define UFSTAT0 (*((volatile unsigned long *)0x7F005018)) #define UTXH0 (*((volatile unsigned char *)0x7F005020)) #define URXH0 (*((volatile unsigned char *)0x7F005024)) #define UBRDIV0 (*((volatile unsigned short *)0x7F005028)) #define UDIVSLOT0 (*((volatile unsigned short *)0x7F00502C)) #define GPACON (*((volatile unsigned short *)0x7F008000)) void init_uart(void) { GPACON &= ~0xff; GPACON |= 0x22; /* ULCON0 */ ULCON0 = 0x3; /* 数据位:8, 无较验, 停止位: 1, 8n1 */ UCON0 = 0x5; /* 使能UART发送、接收 */ UFCON0 = 0x01; /* FIFO ENABLE */ UMCON0 = 0; /* 波特率 */ /* DIV_VAL = (PCLK / (bps x 16 ) ) - 1 * bps = 57600 * DIV_VAL = (66500000 / (115200 x 16 ) ) - 1 * = 35.08 */ UBRDIV0 = 35; /* x/16 = 0.08 * x = 1 */ UDIVSLOT0 = 0x1; } char getchar(void) { while ((UFSTAT0 & (1<<6)) == 0 && (UFSTAT0 & 0x3f) == 0); return URXH0; } void putchar(char c) { while ((UFSTAT0 & (1<<14)) == 1); UTXH0 = c; }