sd.c~

来自「在三星44B0上基于LED数码管的显示个位十位」· C~ 代码 · 共 60 行

#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include "hardware.h"
#define TC 66000000/1000/2/16

static int stop = 0;

int pwminit()
{
	TCFG0 |=0x10;
	TCFG1 |=0x0;
	TCNTB0=TC;
	TCMPB0=TC/2;
	TCON |=0x1<<1;
	TCON &=(~0x1<<1);
	TCON |=0x19;
	return 0;
}

void setpwm(int n)
{
	TCMPB0=n+TC/2;
}

void closepwm()
{
	while(TCNTO0>TCMPB0);
	TCON &= (~0x19) ;
}
void* comMonitor(void* data)
{
	getchar();
	stop=1;
	return NULL;
}

int main(void)
{
	int i = 0;
	pthread_t b;
	void * retval;
	pwminit();	
	pthread_create(&b, NULL,comMonitor,0);
	while(stop == 0)
	{
	setpwm(-500);
	usleep(4000000);
	setpwm(500);
	usleep(4000000);
	
	
	}
	pthread_join(b, &retval);
	closepwm();
	return 0;
	
	
}