zlg7290.h

arm控制gprs模块

#include "i2c.h"
#include "stdio.h"
#include "config.h"

void I2C_Init(int fd);
uint8 GetKey(int fd);
uint8 KeyTest(int fd);
uint8 InputNumber(int fd,char *num);

uint8 temp[2];

uint8 GetKey(int fd)
{ 
   uint16 key_value;
   uint8 key_map[17]={0,1,2,3,4,5,6,7,8,9,0,11,12,13,14,15,16};
   
   temp[0]=1;
   temp[1]=0;
   write(fd, temp, 1);
   read(fd, temp, 2);
   key_value = (temp[0] + (temp[1] * 256));
   return key_map[key_value];
}

uint8 KeyTest(int fd)
{
   uint16 key_flag;
   
   temp[0]=0;
   temp[1]=0;
   write(fd, temp, 1);    //访问系统状态寄存器0x00
   read(fd, temp, 2);
   key_flag = (temp[0] + (temp[1] * 256));
   if(key_flag&0x0001)   //有键按下
   {
     return 1;
   }
   else
   {
     return 0;
   }
} 

void I2C_Init(int fd)
{
   ioctl (fd , I2C_SET_CLH , ((11059200/30000)+1)/2);
   ioctl (fd , I2C_SET_CLL , (11059200/30000)/2);
}

uint8 InputNumber(int fd,char *num) 
{
  uint8 key;
  int flag=1,i=0;
  printf("Please input the number:\n");
  while(flag)
   {
     if ( KeyTest(fd) )
     {
     key = GetKey(fd);
     switch(key)
     {
       case  0: 
       case  1: 
       case  2: 
       case  3: 
       case  4:
       case  5: 
       case  6: 
       case  7: 
       case  8: 
       case  9: if (i<19)
               {
                 num[i++]=(char) (key+48); 
                 break;
               }
               else 
               {
               i=0;
               printf("Input the right number! \n");
               break;
               }	
       case 11: /*
               if(*num) 
               {              
                 Remove( &i,num);
                 break;
               }
               else 
                {
                  printf("w\n");
                   break;
                } */
                break;
       case 12: 
               if (*num) return i;
               else return 0;
               flag=0;
               break;
       default:   break;  
     }
     }
   }
}  

void Remove(int *n,uint8 *num)
{
  int i,j;
  i = *n;
  *n=--i;
  for(j=0;j<i;j++)
  printf("%d",num[j]);
}

void delay(int n)
{
  int i,j;
  for(i=0;i<n;i++)
    for(j=0;j<5000;j++);
}