Cortex A-8裸机串口通信程序

main.c：实现串口简单的发送的功能

#include "s5pc100.h"

int main()
{
	UART0.ULCON0 = 0x03;
	UART0.UCON0 = 0x05;
	UART0.UFCON0 = 0;
	UART0.UMCON0 = 0;
	UART0.UBRDIV0 = 35;
	UART0.UDIVSLOT0 = 0x888;
	UART0.UINTM0 = 0xF;

	while (1) {
		while (!(UART0.UTRSTAT0 & 0x2));
		UART0.UTXH0 = ‘C‘;
	}
}

#include "s5pc100.h"

void putc(char c)
{
	while (!(UART0.UTRSTAT0 & 0x2));
	UART0.UTXH0 = c;

	if (c == ‘\n‘) {//换行
		while (!(UART0.UTRSTAT0 & 0x2));
		UART0.UTXH0 = ‘\r‘;
	}

	if (c == ‘\r‘) {//回车
		while (!(UART0.UTRSTAT0 & 0x2));
		UART0.UTXH0 = ‘\n‘;
	}
}

char getc(void)
{
	while (!(UART0.UTRSTAT0 & 0x1));
	return UART0.URXH0;
}

void puts(char *s)
{
	while (*s != ‘\0‘)
		putc(*s++);
}


int main()
{
	char c;

	GPA0.GPA0CON = 0x22;

	UART0.ULCON0 = 0x03;
	UART0.UCON0 = 0x05;
	UART0.UFCON0 = 0;
	UART0.UMCON0 = 0;
	UART0.UBRDIV0 = 35;
	UART0.UDIVSLOT0 = 0x888;
	UART0.UINTM0 = 0xF;

	while (1) {
		puts("MYTTY: ");
		while (1) {
			c = getc();
			putc(c);
			if (c == ‘\r‘)
				break;
		}
	}
}

说明：上面两个各程序编译所依赖的start.s，map.lds，s5p100.h文件在我的上一篇博客中可以找到，可以拿过来直接使用。

Cortex A-8裸机串口通信程序,布布扣,bubuko.com

Cortex A-8裸机串口通信程序

原文：http://blog.csdn.net/it_liuwei/article/details/22425093