原创 TLC5628数模转换驱动程序

 2009-5-19 12:53  6420 16 15 分类: MCU/ 嵌入式文集: 嵌入式编程

TLC5628是一个8通道8位的DAC转换芯片，其电气参数如下：
(1)Eight 8-Bit Voltage Output DACs
(2)5-V Single-Supply Operation
(3)Serial Interface
(4)High-Impedance Reference Inputs
(5)Programmable 1 or 2 Times Output Range
(6)Simultaneous Update Facility
(7)Internal Power-On Reset
(8)Low-Power Consumption
(9)Half-Buffered Output
下面是AVR单片MEGA16对其的控制程序：
/*****************************************************
This program was produced by the CodeWizardAVR V2.03.4 Standard
Date    : 2009-4-5
Author : sharcky
Chip type           : ATmega16L
Program type        : Application
Clock frequency     : 8.000000 MHz
Memory model        : Small
External RAM size   : 0
Data Stack size     : 256
*****************************************************/
#ifndef _define_h
#define _define_h
#include
#include
#include
//DA设置
#define DACLK_1 PORTC.4 = 1    //CLK端口
#define DACLK_0 PORTC.4 = 0
#define DADAT_1 PORTC.5 = 1    //数据DA端口
#define DADAT_0 PORTC.5 = 0

#define DALDAC_1 PORTC.6 = 1    //LDAC端口
#define DALDAC_0 PORTC.6 = 0
#define DALOAD_1 PORTC.7 = 1    //LOAD端口
#define DALOAD_0 PORTC.7 = 0
/***************************************/
//void SerialDAC_init(void) 串行DAC初始化
/*2009-5-4                             */
/***************************************/
void SerialDAC_init(void) //串行DAC初始化
{

   DALOAD_1;DALDAC_1;DACLK_1;DADAT_1;
}
/*******************************************************************/
/*void SerialDAC_Seting(unsigned char sensor,
                        unsigned char ch，
                        unsigned char mode)
                        串行DAC设置   */
/* unsigned char sensor （范围0~255）输出值范围：0V~2.5V          */
/* unsigned char ch      通道选择（0~7）                           */
/* unsigned char mode    模式选择（两种模式：一倍(0)、二倍(1)）   */
/* 时间：2009-5-4 email:sharck@163.com   调节成功 */
/*******************************************************************/
void SerialDAC_Seting(unsigned char sensor,unsigned char ch ，unsigned char mode)
{
unsigned char i;
unsigned int data1,data2;
if(mode)
{
     switch(ch)
     {
      case 0:
        data1 = 0x0100;break;
      case 1:
        data1 = 0x0300;break;
      case 2:
        data1 = 0x0500;break;
      case 3:
        data1 = 0x0700;break;
      case 4:
        data1 = 0x0900;break;
      case 5:
        data1 = 0x0B00;break;
      case 6:
       data1 = 0x0D00;break;
      case 7:
       data1 = 0x0F00;break;
   }
   }
   else
{
   switch(ch)
     {
      case 0:
        data1 = 0x0000;break;
      case 1:
        data1 = 0x0200;break;
      case 2:
        data1 = 0x0400;break;
      case 3:
        data1 = 0x0600;break;
case 4:
        data1 = 0x0800;break;
      case 5:
        data1 = 0x0A00;break;
      case 6:
       data1 = 0x0C00;break;
      case 7:
       data1 = 0x0E00;break;
   }
   }
data2 = (unsigned int)(sensor);
data1 = data1+data2; //左对齐
DACLK_0;
DALOAD_1;
DALDAC_0;
for (i=0;i<12;i++)
{
      DACLK_1;
      if(data1 & 0x0800)
          DADAT_1;
      else
          DADAT_0;
      data1 <<= 1;
      DACLK_0;
      delay_us(5);
}
DALOAD_0;
delay_us(10);
DACLK_0;
DALOAD_1;
DALDAC_1;
}
#endif