main.c

44b0/linux环境基本实验源码,包括helloworld,线程,串口,AD,DA,CAN总线,LED,电机,GPS,GPRS,键盘驱动等

/************************************************\
*	by threewater<[e-mail]>	*
*		2003.12.18			*
*						*
\***********************************************/

#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include "hardware.h"
#include "zlg7289.h"
#include "s3c44b0-spi.h"

#define SPI_DEV		"/dev/spi/0"
static int spi_fd = -1;

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

static void Delay(int t)
{
	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(char* str)
{
	int i;
	unsigned int showdata;
	char buffer[20],*p=str;

	if(strlen(str)>8)	//the string length must below 8.
		str[8]=0;
	sscanf(str, "%x", &showdata);

	printf("showdata=%x\n",showdata);
	for(i=0;i<8 && *p!=0 ;i++){
		buffer[i*2]=(ZLG7289_CMD_DATA1|i); //
		buffer[i*2+1]=(showdata&0xf);
		showdata>>=4;
		p++;
	}
	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(int argc, char **argv)
{
	float v;
	int value;

	if((spi_fd=open(SPI_DEV, O_NONBLOCK))<0){
		printf("Error opening %s spi device\n", SPI_DEV);
		return 1;
	}
	
	Zlg7289_Reset();
	if(argc==1){
		write_Zlg7289(ZLG7289_CMD_TEST);
		printf("Zlg7289 in test Mode\n");
		goto end;
	}
	Zlg7289_showStr(argv[1]);

end:
	close(spi_fd);                                                         
	return 0;
}