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/*------------------------------------------------------------------------------------------------------------------------------------------*/
/*--*************************功能：【ADS1115單端輸入檢測電壓】********************--*/
/*--*************************CPU：【STC12C5A60S2】*******************************--*/
/*--*************************ADC芯片：【ADS1115（2差分輸入或4單端輸入）】***********--*/
/*--*************************液晶：【LCD1602】************************************--*/
/*--*************************ADC與單片機連接：【SCL:P1.0, SDA:P1.1】*******************--*/
/*--*************************檢測范圍：【0.00～4.99V】*********************************--*/
/*----------------------------------------------------------------------------------------------------------------------------------------*/
#include <reg52.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define _Nop() _nop_()
/*------------------------以下為LCD1602顯示模塊端口定義及函數聲明-----------------------*/
sbit lcd_rs_port = P2^2; /*定義LCD控制端口*/
sbit lcd_rw_port = P2^3;
sbit lcd_en_port = P2^4;
#define lcd_data_port P0
unsigned char num_char_table[] ={"0123456789ABCDEF"};
unsigned char Lcd_Dis1_table[] ={"Volt: V "}; //電壓顯示框架
unsigned char pos_char_table[] ={" 67.9AB V "}; //電壓顯示位置
void lcd_delay(uchar ms); //LCD1602 延時
void lcd_busy_wait(); //LCD1602 忙等待
void lcd_command_write(uchar command); //LCD1602 命令字寫入
void lcd_system_reset(); //LCD1602 初始化
void lcd_char_write(ucharx_pos,y_pos,lcd_dat); //LCD1602 字符寫入
void lcd_bad_check(); //LCD1602 壞點檢查
void Num_to_Disp(uint Num); //LCD1602 數據處理
void LcdDisp(uint num); //LCD1602 數據顯示
void delay_1ms(uchar x); //LCD1602 延時1ms
/*------------------------以下為ADS1115模塊端口定義及函數聲明--------------------------*/
sbit SCL = P1^0;
sbit SDA = P1^1;
#define TRUE 1
#define FALSE 0
unsigned int Config;
unsigned char Writebuff[4],Readbuff[3];
unsigned int Result[2];
int D_ADS; //轉換的數字量
#define Accuracy 32768 //定義ADC精度，ADS1115單端輸入時15位
char VCC = 4.78; //VCC，電壓參考值
#define ADDRESS_0 0x90 //ADDR PIN ->GND
#define ADDRESS_1 0x92 //ADDR PIN ->VDD
#define ADDRESS_2 0x94 //ADDR PIN ->SDA
#define ADDRESS_3 0x96 //ADDR PIN ->SCL
/************POINTERREGISTER*****************/
#define Pointer_0 0x00 //Convertion register
#define Pointer_1 0x01 //Config register
#define Pointer_2 0x02 //Lo_thresh register
#define Pointer_3 0x03 //Hi_thresh register
/************CONFIG REGISTER*****************/
#define OS_0 0x0000
#define OS_1 0x8000
#define MUX_0 0x0000 //AINp=AIN0, AINn=AIN1
#define MUX_1 0x1000 //AINp=AIN0, AINn=AIN3
#define MUX_2 0x2000 //AINp=AIN1, AINn=AIN3
#define MUX_3 0x3000 //AINp=AIN2, AINn=AIN3
#define MUX_4 0x4000 //AINp=AIN0, AINn=GND
#define MUX_5 0x5000 //AINp=AIN1, AINn=GND
#define MUX_6 0x6000 //AINp=AIN2, AINn=GND
#define MUX_7 0x7000 //AINp=AIN3, AINn=GND
#define PGA_0 0x0000 //FS=6.144V
#define PGA_1 0x0200 //FS=4.096V
#define PGA_2 0x0400 //FS=2.048V
#define PGA_3 0x0600 //FS=1.024V
#define PGA_4 0x0800 //FS=0.512V
#define PGA_5 0x0A00 //FS=0.256V
#define PGA_6 0x0C00 //FS=0.256V
#define PGA_7 0x0E00 //FS=0.256V
#define MODE_0 0x0000
#define MODE_1 0x0100
#define DR_0 0x0000 //Data Rate = 8
#define DR_1 0x0020 //Data Rate = 16
#define DR_2 0x0040 //Data Rate = 32
#define DR_3 0x0060 //Data Rate = 64
#define DR_4 0x0080 //Data Rate = 128
#define DR_5 0x00A0 //Data Rate = 250
#define DR_6 0x00C0 //Data Rate = 475
#define DR_7 0x00E0 //Data Rate = 860
#define COMP_MODE_0 0x0000
#define COMP_MODE_1 0x0010
#define COMP_POL_0 0x0000
#define COMP_POL_1 0x0008
#define COMP_LAT_0 0x0000
#define COMP_LAT_1 0x0040
#define COMP_QUE_0 0x0000
#define COMP_QUE_1 0x0001
#define COMP_QUE_2 0x0002
#define COMP_QUE_3 0x0003
//*************ADDRInitial********************/
#define ADDRESS ADDRESS_0 //ADDR PIN ->GND
#define ADDRESS_W ADDRESS|0x00 //寫地址
#define ADDRESS_R ADDRESS|0x01 //讀地址
/*************ConfigInitial*********************/
#define OS OS_1
#define MUX_A0 MUX_4 //AINp=AIN0, AINn=GND
#define MUX_A1 MUX_5 //AINp=AIN1, AINn=GND
#define MUX_A2 MUX_6 //AINp=AIN2, AINn=GND
#define MUX_A3 MUX_7 //AINp=AIN3, AINn=GND
#define PGA PGA_1 //FS=6.144V
#define MODE MODE_1 //Continuous conversion mode
#define DR DR_7 //Data Rate = 860
#define COMP_QUE COMP_QUE_3
void Delay_us_15 (void);
void Delay_ms_1 (void); //功能：延時
void Start(void); //功能：完成IIC的起始條件操作
void Stop(void); //功能：完成IIC的終止條件操作
void ACK(void); //功能：完成IIC的主機應答操作
void NACK(void); //功能：完成IIC的主機無應答操作
unsigned char Check(void);//功能：檢查從機的應答操作
void Write_1_Byte(unsigned char DataByte); //寫 1個字節
unsigned char Write_N_Byte(unsigned char*writebuffer,unsigned char n); //寫 N個字節
unsigned char Read_1_Byte(void); //讀 1個字節
void Read_N_Byte(unsigned int*readbuff,unsigned char n); //讀 N個字節
void InitADS1115(bit S_MUX_0, bit S_MUX_1); //ADS1115初始化
void WriteWord(void); //寫
void ReadWord(void); //讀
unsigned int ADS1115(bit S_MUX_0, bitS_MUX_1); //ADS1115取值
/*--------------------------------------------------------------------------------------------------------------------------------*/
/*--*********************************【主函數】*******************************--*/
/*-------------------------------------------------------------------------------------------------------------------------------*/
void main()
{
unsignedint result;
lcd_system_reset(); //LCD1602 初始化
lcd_bad_check(); //LCD1602 壞點檢查
while(1)
{
result= ADS1115(0,0); //ADS1115取值_AIN0
//result= ADS1115(0,1); //ADS1115取值_AIN1
//result = ADS1115(1,0); //ADS1115取值_AIN2
//result = ADS1115(1,1); //ADS1115取值_AIN3
LcdDisp(result); //LCD1602顯示電壓值
}
}
/*--------------------------------------------------------------------------------------------------------------------------------*/
/*--****************************************************************************--*/
/*-------------------------------------------------------------------------------------------------------------------------------*/
/*------------------------以下為LCD1602顯示模塊函數定義-----------------------*/
void lcd_delay(uchar ms) /***********LCD1602 延時***************/
{
uchar j;
while(ms--){
for(j=0;j<250;j++)
{;}
}
}
void lcd_busy_wait() /**********LCD1602 忙等待*************/
{
lcd_rs_port = 0;
lcd_rw_port = 1;
lcd_en_port = 1;
lcd_data_port = 0xff;
while (lcd_data_port&0x80);
lcd_en_port = 0;
}
void lcd_command_write(uchar command) /**********LCD1602 命令字寫入*************/
{
lcd_busy_wait();
lcd_rs_port = 0;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = command;
lcd_en_port = 1;
lcd_en_port = 0;
}
void lcd_system_reset() /**********LCD1602 初始化**************/
{
lcd_delay(20);
lcd_command_write(0x38);
lcd_delay(100);
lcd_command_write(0x38);
lcd_delay(50);
lcd_command_write(0x38);
lcd_delay(10);
lcd_command_write(0x08);
lcd_command_write(0x01);
lcd_command_write(0x06);
lcd_command_write(0x0c);
}
void lcd_char_write(ucharx_pos,y_pos,lcd_dat) /******LCD1602 字符寫入**********/
{
x_pos &= 0x0f; /* X位置范圍 0~15 */
y_pos &= 0x01; /* Y位置范圍 0~ 1 */
if(y_pos==1) x_pos += 0x40;
x_pos += 0x80;
lcd_command_write(x_pos);
lcd_busy_wait();
lcd_rs_port = 1;
lcd_rw_port = 0;
lcd_en_port = 0;
lcd_data_port = lcd_dat;
lcd_en_port = 1;
lcd_en_port = 0;
}
void lcd_bad_check() /******LCD1602 壞點檢查**********/
{
char i,j;
for(i=0;i<2;i++){
for(j=0;j<16;j++) {
lcd_char_write(j,i,0xff);
}
}
lcd_delay(200);
lcd_delay(200);
lcd_delay(200);
lcd_delay(100);
lcd_delay(200);
lcd_command_write(0x01); //clear lcd disp
}
void Num_to_Disp(uint Num) /******LCD顯示數據處理*****/ //Start_1-Over_1:顯示電壓值，Start_2-Over_2:顯示ADS1115輸出數值
{
floatNUM; //Start_1
intxx, yy, zz, zzz;
NUM= (Num / (float)Accuracy) * VCC; //ADS1115取值 = Accuracy× (Vin / VCC)
xx= (int)NUM;
yy= (int)((NUM - (float)(xx)) * 10);
zz= (int)((NUM - (float)(xx)) * 100)%10;
zzz= (int)((NUM - (float)(xx)) * 1000)%10;
pos_char_table[6]= num_char_table[xx / 10]; //電壓值十位
pos_char_table[7]=num_char_table[xx % 10]; //電壓值個位
pos_char_table[9]=num_char_table[yy]; //電壓值小數點后一位
pos_char_table[10]=num_char_table[zz]; //電壓值小數點后兩位
pos_char_table[11]=num_char_table[zzz]; //電壓值小數點后三位 //Over_1
/*
pos_char_table[6]= num_char_table[Num / 10000]; //Start_2
pos_char_table[7]= num_char_table[(Num % 10000) / 1000];
pos_char_table[8]=num_char_table[((Num % 10) % 1000) / 100];
pos_char_table[9]=num_char_table[(Num / 10) % 10];
pos_char_table[A]=num_char_table[Num % 10]; //Over_2
*/
}
void LcdDisp(uint num) /************LCD顯示*************/
{
uinti=0;
for(i=0;i<16;i++)
{
lcd_char_write(i,0,Lcd_Dis1_table[ i]); //顯示框架
}
Num_to_Disp(num);
for(i= 6; i < 12; i++)
{
lcd_char_write(i,0,pos_char_table[ i]); //顯示電壓
}
delay_1ms(100);
}
void delay_1ms(uchar x) /*******1MS為單位的延時程序******/
{
uchar j;
while(x--){
for(j=0;j<125;j++)
{;}
}
}
/*------------------------以下為ADS1115模塊端口函數定義--------------------------*/
void Delay_us_15 (void) /*延時程序*/
{
unsigned char i;
for(i = 0;i < 15;i++)
_nop_();
}
void Delay_ms_1 (void)
{
unsignedchar i;
for(i= 150;i > 0;i--) _nop_();
}
///*******************************************
//函數名稱：Start
//功能：完成IIC的起始條件操作
//參數：無
//返回值：無
//********************************************/
void Start(void)
{
SCL=1;
SDA=1;
Delay_us_15 ();
SDA=0;
Delay_us_15 ();
SCL=0;
Delay_us_15 ();
}
//
///*******************************************
//函數名稱：Stop
//功能：完成IIC的終止條件操作
//參數：無
//返回值：無
//********************************************/
void Stop(void)
{
SDA=0;
Delay_us_15 ();
SCL=1;
Delay_us_15 ();
SDA=1;
Delay_us_15 ();
}
///*******************************************
//函數名稱：ACK
//功能：完成IIC的主機應答操作
//參數：無
//返回值：無
//********************************************/
void ACK(void)
{
SDA=0;
_nop_(); _nop_();
SCL=1;
Delay_us_15 ();
SCL=0;
_nop_();_nop_();
SDA=1;
Delay_us_15 ();
}
//*******************************************
//函數名稱：NACK
//功能：完成IIC的主機無應答操作
//參數：無
//返回值：無
//********************************************/
void NACK(void)
{
SDA=1;
_nop_();_nop_();
SCL=1;
Delay_us_15();
SCL=0;
_nop_();_nop_();
SDA=0;
Delay_us_15();
}
//**********檢查應答信號函數******************/
///*如果返回值為1則證明有應答信號，反之沒有*/
///*******************************************
//函數名稱：Check
//功能：檢查從機的應答操作
//參數：無
//返回值：從機是否有應答：1--有，0--無
//********************************************/
unsigned char Check(void)
{
unsigned char slaveack;
SDA=1;
_nop_(); _nop_();
SCL=1;
_nop_(); _nop_();
_nop_(); _nop_();
slaveack = SDA; //讀入SDA數值
SCL=0;
Delay_us_15 ();
if(slaveack) return FALSE;
else return TRUE;
}
/***************Write a Byte****************/
void Write_1_Byte(unsigned char DataByte)
{
inti;
for(i=0;i<8;i++)
{
if(DataByte&0x80) //if((DataByte<<i)&0x80)
SDA=1;
else
SDA=0;
Delay_us_15 ();
SCL=1;
Delay_us_15 ();
SCL=0;
Delay_us_15 ();
DataByte <<= 1;
}
SDA=1;
_nop_();
}
/***************Write NByte****************/
unsigned char Write_N_Byte(unsigned char*writebuffer,unsigned char n)
{
inti;
for(i=0;i<n;i++)
{
Write_1_Byte(*writebuffer);
if(Check())
{
writebuffer++;
}
else
{
Stop();
return FALSE;
}
}
Stop();
returnTRUE;
}
//***************Read aByte****************/
unsigned char Read_1_Byte(void)
{
unsigned char data_Value = 0, FLAG, i;
for(i=0;i<8;i++)
{
SDA=1;
Delay_us_15();
SCL=1;
Delay_us_15();
FLAG=SDA;
data_Value <<= 1;
if(FLAG)
data_Value |= 0x01;
SCL=0;
Delay_us_15 ();
}
return data_Value;
}
//***************Read NByte****************/
void Read_N_Byte(unsigned int*readbuff,unsigned char n)
{
unsignedchar i;
for(i=0;i<n;i++)
{
readbuff[ i]=Read_1_Byte();
if(i==n-1)
NACK(); //不連續讀字節
else
ACK();//連續讀字節
}
Stop();
}
//*****************初始化******************/
void InitADS1115(bit S_MUX_0, bit S_MUX_1)
{
if(S_MUX_0 == 0 && S_MUX_1 == 0) //AIN0
Config= OS+MUX_A0+PGA+DR+COMP_QUE+MODE;
if(S_MUX_0 == 0 && S_MUX_1 == 1) //AIN1
Config= OS+MUX_A1+PGA+DR+COMP_QUE+MODE;
if(S_MUX_0 == 1 && S_MUX_1 == 0) //AIN2
Config= OS+MUX_A2+PGA+DR+COMP_QUE+MODE;
if(S_MUX_0 == 1 && S_MUX_1 == 1) //AIN3
Config= OS+MUX_A3+PGA+DR+COMP_QUE+MODE;
Writebuff[0]=ADDRESS_W;
Writebuff[1]=Pointer_1;
Writebuff[2]=Config/256;
Writebuff[3]=Config%256;
Readbuff[0]=ADDRESS_W;
Readbuff[1]=Pointer_0;
Readbuff[2]=ADDRESS_R;
}
//***************Write aWord***********************/
void WriteWord(void)
{
int t;
Start(); //寫入4個字節
do
{
t=Write_N_Byte(Writebuff,4);
}while(t==0);
}
//***************ReadWord***********************/
void ReadWord(void)
{
int t;
Start(); //寫入2個字節
do
{
t=Write_N_Byte(Readbuff,2);
}while(t==0);
Start(); //寫入2個字節
do
{
t=Write_N_Byte(&Readbuff[2],1);
}while(t==0);
Read_N_Byte(Result,2); //讀出2個字節
}
//***************ADS1115********************/
unsigned int ADS1115(bit S_MUX_0, bitS_MUX_1)
{
InitADS1115(S_MUX_0, S_MUX_1);
WriteWord();
Delay_ms_1();
ReadWord();
D_ADS=Result[0]*256+Result[1]; //轉換的數字量
return D_ADS;
}

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