sj.c

在三星44B0上基于LED数码管的显示个位十位

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/ioctl.h>
#include <pthread.h>
#include <fcntl.h>
#include "zlg7289.h"
#include "s3c44b0-spi.h"
#include <string.h>
#include"time.h"
#include "hardware.h"
//#define TC 1024
#define TC 66000000/16/2/1000
#define SPI_DEV		"/dev/spi/0"
static int spi_fd = -1;

#define Zlg7289_Reset()	do{write_Zlg7289(ZLG7289_CMD_RST);Delay(20);}while(0)

#define ADCCON_FLAG		0x40
#define ADCCON_SLEEP		0x20

pthread_mutex_t lock;
int x;
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=TC/1024*(n-512)+TC/2;
}

void closepwm()
{
	while(TCNTO0>TCMPB0);
	TCON &= (~0x19) ;
	}
void init_ADdevice(void)
{
	ADCPSR=20;
	ADCCON=ADCCON_SLEEP;
}
int GetADresult(int i)
{
	int j;
	ADCCON=i<<2|0x1;
	while(ADCCON&0x1);
	for(j=0;j<100;j++);
	while(!(ADCCON&0x40));
	return ADCDAT;
}

void* comMonitor(void* data)
{
	getchar();
	stop=1;
	closepwm();
	close(spi_fd);
	exit(0);
	return NULL;
}
void* com0(void* data)
{
	int i=0;

	while(1)
	{
	pthread_mutex_lock(&lock);
	x=(int)GetADresult(1);
	
	pthread_mutex_unlock(&lock);
	for(i=0;i<100;i++);
	}
	return NULL;
}

static void Delay(int t)   //LED
{
	int i;
	for(;t>0;t--)
		for(i=0;i<400;i++);
}

static void write_Zlg7289(int cmd)
{
	spi_rw data;
	data.buffer=(char*)&cmd;
	data.size=1;
        if(ioctl(spi_fd, SPI_IOCTRL_WFORZLG7289, &data)!=0){
            printf("Error IOCTRL, please check your spi driver in kernel!\n");
			close(spi_fd);                                                                  
	exit(1);
        }
}

static void mwrite_Zlg7289(char* buffer, int size)
{
	spi_rw data;
	data.buffer=buffer;
	data.size=size;
        if(ioctl(spi_fd, SPI_IOCTRL_WFORZLG7289, &data)!=0){
                printf("Error IOCTRL, please check your spi driver in kernel!\n");
                close(spi_fd);
                exit(1);
        }

}

static void Zlg7289_showStr(int str)
{
	int i;
	char buffer[20];
	for(i=0;i<8 && str!=0 ;i++){
		buffer[i*2]=(ZLG7289_CMD_DATA1|i); 
		buffer[i*2+1]=(str%10);
		str/=10;
	}
	for(;i<8;i++){
		buffer[i*2]=(ZLG7289_CMD_DATA0|i);
		buffer[i*2+1]=0xf;	//don't show any word
	}

	mwrite_Zlg7289(buffer, 16);
}


		
int main(void)
{
	int i,m=0;
	pthread_t b,a0;
	void * retval;
	pwminit();	
	init_ADdevice();
	usleep(1);
	pthread_create(&b, NULL,comMonitor,0);
	pthread_create(&a0, NULL,com0,0);
	if((spi_fd=open(SPI_DEV, O_NONBLOCK))<0){
		printf("Error opening %s spi device\n", SPI_DEV);
		return 1;
	}

	Zlg7289_Reset();
	while(stop == 0)
	{
		setpwm(x);
		
		if((m-x)>2||(x-m)>2)
		{
			m=x;
			Zlg7289_showStr(x);
		}
	}
	
	
	pthread_join(b, &retval);
	pthread_join(a0, &retval);


	return 0;

}