cp2512.c

触摸芯片的程序。实现触摸按键代替传统机械式按键。

/*****************************************************
This program was produced by the
CodeWizardAVR V1.25.3 Professional
Automatic Program Generator
?Copyright 1998-2007 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project :
Version :
Date    : 2008/6/4
Author  : wangzi26
Company : SEELO
Comments:


Chip type           : ATmega16
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*****************************************************/
#include "cp2512.h"

unsigned int cp2512_rd(unsigned char add)
{
 unsigned int data=0;
 #asm("cli")
 i2c_start();
 i2c_write(i2c_add);
 i2c_write(add);
 i2c_start();
 i2c_write(i2c_add | 1);
 data=i2c_read(1);
 data<<=8;
 data+=i2c_read(0);
 i2c_stop();
 #asm("sei")
 return data;
 }


 
/****************************************************/
/****               返回按键值                   ****/
/****************************************************/
 unsigned char get_key(void)
  {
   unsigned int  temp1=0;
   unsigned char temp;
   temp1=cp2512_rd(0x30);
   delay_ms(100);
   switch (temp1)
   {
    case 0x0000:temp=0;break;
    case 0x0800:temp=12;break;
    case 0x0020:temp=5;break;
    case 0x0001:temp=10;break;
    case 0x0400:temp=9;break;
    case 0x0040:temp=11;break;
    case 0x0002:temp=7;break;
    case 0x0200:temp=6;break;
    case 0x0080:temp=8;break;
    case 0x0004:temp=4;break;
    case 0x0100:temp=3;break;  //*
    case 0x0010:temp=2;break;   //0
    case 0x0008:temp=1;break;  //#
    default : temp=0;break;
   };
   return temp;
  }


void cp2512_wr(unsigned char re_add,unsigned int data)
{
 i2c_start();
 i2c_write(i2c_add);
 i2c_write(re_add);
 i2c_write(data>>8);
 i2c_write(data);
 i2c_stop();
}



/***************cp2512初始化********************/
void cp2512_init(void)
{
 cp2512_wr(0x05,0x0fff);
 cp2512_wr(0x06,0x0fff);
 cp2512_wr(0x2e,0x03fff);
 cp2512_rd(0x33);
}

void cp2512_sleep(unsigned char temp)
 {
  if(temp==ON)
   {
    cp2512_wr(0x01,0x0000);
   }
  else if(temp==OFF)
   {
    cp2512_wr(0x01,0x1000);
   }
 }