spidemo.c

来自「一个嵌入式linux的驱动程序例子」· C语言 代码 · 共 50 行

#include <linux/types.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <stdio.h>
#include "spi.h"

int dev_handle,boot_handle,PacketNum,DotNum;
unsigned char bootdata[60*1024],*p;
unsigned int filelen;
unsigned long temp;

int boot()
{  
  boot_handle=open("bootload.bin",O_RDONLY);
  if(boot_handle==-1)
    {
      printf("Boot file not found,reset dsp fauler!\n");
      close(dev_handle);
      return -1;
    }
  
  filelen=lseek(boot_handle,0,SEEK_END);
  lseek(boot_handle,0,SEEK_SET);
  read(boot_handle,bootdata,filelen);
  close(boot_handle);

  ioctl(dev_handle,SPI_SET_BOOTLEN,filelen);
  return ioctl(dev_handle,SPI_SEND_BOOTDATA,bootdata);
} 


int main()
{
  
  dev_handle=open("/dev/spi_drv",O_RDWR);
  if(dev_handle==-1)
    {
      printf("Device not exist,check system!\n");
      return -1;
    }
  boot();
  /*
  for(temp=0;temp<0x1ffffff;temp++){};
  ioctl(dev_handle,SPI_BLIGHT_ON,NULL);
  */
  ioctl(dev_handle,SPI_MODEM_RESET,NULL);
  close(dev_handle);
  return 0;
}