📄 ad7705 sensor.c
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#include <reg931.h>
#include <stdio.h>
#include <flashiap.h>
#define uchar unsigned char
#define uint unsigned int
#define CH1 1 /*AD7705输入通道IN1*/
#define CH2 2 /*AD7705输入通道IN2*/
#define BIPOLAR 0 /*AD7705双极性输入*/
#define UNIPOLAR 1 /*AD7705单极性输入*/
#define AD_CLK_WIDTH 1 /*AD7705串口时钟脉冲宽度*/
sbit AdClk = P2^5; /*AD7705时钟脉冲*/
sbit AdDout = P2^3; /*AD7705数据输出的反相脉冲*/
sbit AdDin = P2^2; /*AD7705数据输入脉冲*/
sbit DRDY = P2^7;
sbit REST = P2^6;
sbit ALARM_X = P2^0;
sbit ALARM_Y = P2^1;
uchar code BAUD_Data = 0xfa; /*存储波特率初值*/ //19200
uchar code ID1 = 0x30,ID0 = 0x31,Update = 1;
uchar code ALARM[8]={0x01,0x00,0xff,0xff,0x01,0x00,0xff,0xff};
uchar code ZERO[4]; //////////////////////
uint idata ZeroPoint_X,ZeroPoint_Y;
uint idata ReceiveData_X[4]; /*存储从AD7705读到的转换结果*/
uint idata ReceiveData_Y[4];
uint idata ALARM_X_P,ALARM_Y_P,ALARM_X_N,ALARM_Y_N;
uchar idata RIFlag,SendFlag,ArrangeFlag,InitFlag;
uchar idata BAUD_temp,BAUD_Data_temp,Update_temp = 1,ID0_temp,ID1_temp,ZeroPoint_X_temp,ZeroPoint_Y_temp;
uchar idata CommandData[7]; /*存储从串口接收到的命令数据*/
uchar idata i = 6; /*命令数据字符串的小脚标*/
uchar f = 1,ChannelFlag = 2,zerotemp;
float idata LSB = 0.000457764;
//---------------------------------------------------------------------------
//功能：看门狗初始化
//---------------------------------------------------------------------------
void WatchdogInit(void)
{
WDL = 0XFF; //看门狗复位时间
EA =0;
WDCON = 0XE6; //选择看门狗振荡器为看门狗时钟源；//0XE5;选择PCLK为看门狗时钟源
WFEED1 = 0XA5;
WFEED2 = 0X5A;
EA =1;
}
///---------------------------------------------------------------------------
//功能：关看门狗定时器时钟
//---------------------------------------------------------------------------
void WatchdogStop(void)
{
EA =0;
WDCON =0XE1;
WFEED1 =0XA5;
WFEED2 =0X5A;
EA =1;
}
//---------------------------------------------------------------------------
//功能：喂狗程序
//---------------------------------------------------------------------------
void WatchdogFeed(void)
{
EA =0;
WFEED1 = 0XA5;
WFEED2 = 0X5A;
EA =1;
}
//---------------------------------------------------------------------------
//功能：初始化单片机接口
//---------------------------------------------------------------------------
/*void UART_Init()
{
P1M1 = 0x00;
P1M2 = 0x00;
SCON = 0x52;
SSTAT = 0x60;
BRGR1 = 0x02;
BRGR0 = 0xf0;
BRGCON = 0x03;
}
*/
//---------------------------------------------------------------------------
//功能：串口中断处理
//---------------------------------------------------------------------------
void serial() interrupt 4 using 1
{
if(RI)
{
CommandData[i] = SBUF;
if(CommandData[i] == 0x0d)
{
RIFlag = 1;
}
i--;
}
RI = 0;
}
//---------------------------------------------------------------------------
//功能：AD7705软件延时d
//---------------------------------------------------------------------------
void Wait7705(unsigned int t)
{
for( ;t>0 ;t-- );
}
//---------------------------------------------------------------------------
//功能：向AD7705写入一个字
//---------------------------------------------------------------------------
void WriteByte7705(uchar x)
{
uchar i;
AdClk = 1;
for (i=0; i<8; i++)
{
AdClk=0;
Wait7705(AD_CLK_WIDTH);
AdDin =(bit) (x & 0x80);
Wait7705(AD_CLK_WIDTH);
AdClk=1;
Wait7705(AD_CLK_WIDTH);
x <<=1;
}
}
//---------------------------------------------------------------------------
//功能：从AD7705读一个字
//---------------------------------------------------------------------------
uint ReadWord7705(void)
{
uchar i;
uint x ;
AdClk = 1 ;
for (i = 0,x=0 ; i < 16 ; i++)
{
AdClk=0;
Wait7705(AD_CLK_WIDTH);
x<<=1;
if (AdDout) /* 光电耦合器反相 */
x |= 0x01;
AdClk=1;
Wait7705(AD_CLK_WIDTH);
}
return x;
}
//---------------------------------------------------------------------------
//功能：AD7705通信端口复位
//---------------------------------------------------------------------------
void Reset7705(void)
{
uchar i;
for(i=0;i<35;i++) //多于连续32个 DIN=1 使串口复位
{
AdClk=0;
Wait7705(AD_CLK_WIDTH);
AdDin =1;
Wait7705(AD_CLK_WIDTH);
AdClk=1;
Wait7705(AD_CLK_WIDTH);
}
}
//---------------------------------------------------------------------------
//功能：AD7705初始化 通道channel 1=IN1,2=IN2; 输入极性polarity -0=双极性,1=单极性; PGA 增益gai 非缓冲模式
//---------------------------------------------------------------------------
void Init7705(uchar channel, bit polarity , uchar gain)
{
uchar x;
Reset7705(); /* 防止串口失步 */
if(channel == 1)
{
WriteByte7705(0x20); /* 写ch0 clock register */
WriteByte7705(0x05); /* 2.4576MHz时钟，50Hz数据更新速率 */
}
else
{
WriteByte7705(0x21); /* 写CH1 clock register */
WriteByte7705(0x05); /* 2.4576MHz时钟，50Hz数据更新速率 */
}
if(channel==1) /* com register ,选择下步操作 setup register */
WriteByte7705(0x10);
else
WriteByte7705(0x11);
if(polarity) /* setup register */
x=0x04;
else
x=0x00;
switch(gain)
{
case 1 : x|=0x40;break;
case 2 : x|=0x48;break;
case 4 : x|=0x50;break;
case 8 : x|=0x58;break;
case 16 : x|=0x60;break;
case 32 : x|=0x68;break;
case 64 : x|=0x70;break;
case 128 : x|=0x78;break;
default : x|=0x40;break;
}
WriteByte7705(x);
}
//---------------------------------------------------------------------------
//功能：读AD7705转换数据 输入通道channel ----1=IN1,2=IN2;
//---------------------------------------------------------------------------
uint GetData7705(uchar channel)
{
if(channel==1)
WriteByte7705(0x38);
else
WriteByte7705(0x39);
return ( ReadWord7705() );
}
//---------------------------------------------------------------------------
//功能：处理串口收到的数据
//---------------------------------------------------------------------------
void ArrangeData(void)
{
if(CommandData[6] == 'C'|CommandData[6] == 'c') /*终止数据更新命令*/
{
Update_temp = 0;
}
if(CommandData[6] == '$'&(CommandData[5] == 'I'|CommandData[5] == 'i')&CommandData[4] == ','&CommandData[1] == 0x0d) /*终止数据更新命令*/
{
ID1_temp = CommandData[3];
ID0_temp = CommandData[2];
EA = 0;
FLASH_WriteByte(&ID1,ID1_temp);
FLASH_WriteByte(&ID0,ID0_temp);
EA = 1;
if(ID0==ID0_temp&ID1==ID1_temp)
printf("ID SET OK.\n");
else
printf("ID SET FAILURE.\n");
printf("Currently ID=%c%c\n",ID1,ID0);
}
if((CommandData[6] == 'T'|CommandData[6] == 't')&CommandData[5] == 0x0d)
{
printf("\nID=%c%c\n",ID1_temp,ID0_temp);
printf("ZeroPoint_X=%2.3f\n",ZeroPoint_X*LSB);
printf("ZeroPoint_Y=%2.3f\n",ZeroPoint_Y*LSB);
printf("ALARM_X+:%2.3f,ALARM_X-:-%2.3f\n",(ALARM_X_P*LSB-15),(15-ALARM_X_N*LSB));
printf("ALARM_Y+:%2.3f,ALARM_Y-:-%2.3f\n",(ALARM_Y_P*LSB-15),(15-ALARM_Y_N*LSB));
}
if(CommandData[6] == '$'&(CommandData[5] == 'R'|CommandData[5] == 'r')&CommandData[4] == 0x0d)/*复位命令*/
{
EA = 0;
FLASH_WriteByte(&ALARM[7],0xff);
FLASH_WriteByte(&ALARM[6],0xff);
FLASH_WriteByte(&ALARM[5],0x00);
FLASH_WriteByte(&ALARM[4],0x00);
FLASH_WriteByte(&ALARM[3],0xff);
FLASH_WriteByte(&ALARM[2],0xff);
FLASH_WriteByte(&ALARM[1],0x00);
FLASH_WriteByte(&ALARM[0],0x00);
FLASH_WriteByte(&ZERO[3],0x00);
FLASH_WriteByte(&ZERO[2],0x00);
FLASH_WriteByte(&ZERO[1],0x00);
FLASH_WriteByte(&ZERO[0],0x00);
EA = 1;
ALARM_X_P = ALARM[7];
ALARM_X_P<<=8;
ALARM_X_P |=ALARM[6];
ALARM_X_N = ALARM[5];
ALARM_X_N<<=8;
ALARM_X_N |=ALARM[4];
ALARM_Y_P = ALARM[3];
ALARM_Y_P<<=8;
ALARM_Y_P |=ALARM[2];
ALARM_Y_N = ALARM[1];
ALARM_Y_N<<=8;
ALARM_Y_N |=ALARM[0];
ZeroPoint_X = 0;
ZeroPoint_Y = 0;
}
if((CommandData[6] == 'G'|CommandData[6] == 'g')&(CommandData[5] == 'O'|CommandData[5] == 'o')&CommandData[4] == 0x0d)
{
Update_temp = 1;//Update; /*继续输出数据*/
}
if(CommandData[6] == '$'&(CommandData[5] == 'Z'|CommandData[5] == 'z')&CommandData[4] == 0x0d)/*将当前位置设为零点*/
{
ZeroPoint_X = ReceiveData_X[0]-0x7fff;
ZeroPoint_Y = ReceiveData_Y[0]-0x7fff;
EA = 0;
zerotemp = ZeroPoint_X;
FLASH_WriteByte(&ZERO[2],zerotemp);
ZeroPoint_X>>=8;
zerotemp = ZeroPoint_X;
FLASH_WriteByte(&ZERO[3],zerotemp);
zerotemp = ZeroPoint_Y;
FLASH_WriteByte(&ZERO[0],zerotemp);
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