Cortex A8，PWM裸机程序

#include "s5pc100.h"

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

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

	if (c == ‘\r‘) {
		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;

	GPD.GPDCON = (0x2 << 4);//使能为pwm输出
	TIMER.TCFG0 = 0xFF;//256分频
	TIMER.TCFG1 = 0x4 << 4;//16分频
	TIMER.TCNTB1 = 31;//计数周期
	TIMER.TCMPB1 = 15;//脉冲宽度

	TIMER.TCON = 0xE << 8;//装载初值
	TIMER.TCON = 0xD << 8;//开始计数

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

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Cortex A8，PWM裸机程序

原文：http://blog.csdn.net/it_liuwei/article/details/22689995