0k6410 UART通信裸机程序

#define GPACON (*(volatile unsigned *)(0x7f008000)) #define GPAPUD (*(volatile unsigned *)(0x7f008008)) #define ULCON0 (*(volatile unsigned *)(0x7f005000)) #define UCON0 (*(volatile unsigned *)(0x7f005004)) #define UFCON0 (*(volatile unsigned *)(0x7f005008)) #define UMCON0 (*(volatile unsigned *)(0x7f00500c)) #define UBRDIV0 (*(volatile unsigned *)(0x7f005028)) #define rUTRSTAT0 (*(volatile unsigned *)(0x7f005010)) #define rUTXH0 (*(volatile unsigned *)(0x7f005020)) #define rURXH0 (*(volatile unsigned *)(0x7f005024)) #define PCLK 66000000 void uart0_init(void) { //配置GPA口为串口作用 GPACON&=~(0xff); GPACON|=0x2|(0x2<<4); GPAPUD&=~0xf; //8个数据位，无校验位，1个停止位 ULCON0=0x03; //查询方式，UART时钟源为PCLK UCON0=0x805; //不是使用FIFO UFCON0=0x00; //不使用流控 UMCON0=0x00; //波特率为115200 UBRDIV0=((int)(PCLK/16/115200)-1); } void uart_send_byte(unsigned char byte) { //当UTRSTAT0发送缓冲为空 while(!(rUTRSTAT0&0x2)); //将byte写入UTXH0 rUTXH0=byte; } unsigned char uart_recv_byte(void) { unsigned char ch; //当URTSTAT0接收缓冲满则从UTXH0接收一个字节 while(!(rUTRSTAT0&0x1)); //从函数返回该字节 ch=rURXH0; return ch; } void uart_sendstring(char *pt) { while(*pt) { uart_send_byte(*pt); pt++; } } void main(void) { unsigned char ch='b'; char string[80]={"please input information\n"}; char st[50]="\n please input a charactor\n"; uart0_init(); uart_sendstring(string); while(1) { uart_sendstring(st); ch=uart_recv_byte(); if(ch==0x0a) { uart_send_byte(0x0d); } else uart_send_byte(ch); } }