SGM58031替代ADS1115是否要修改程序？请看下面的ADS1115模拟IIC驱动。

871881392 · 发表于 2022-4-18 16:08:32

#include "stm32f10x_conf.h"
#include "delay.h"

#define SCL_1 GPIO_SetBits(GPIOC,GPIO_Pin_14)
#define SCL_0 GPIO_ResetBits(GPIOC,GPIO_Pin_14)
#define SDA_1 GPIO_SetBits(GPIOC,GPIO_Pin_15)
#define SDA_0 GPIO_ResetBits(GPIOC,GPIO_Pin_15)
#define SDA_dat GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_15)  //读入SDA数值

#define TRUE  1
#define FALSE 0

#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

#define ADDRESS0 ADDRESS_0 //ADDR PIN ->GND
#define ADDRESS_W ADDRESS0|0x00 //写地址
#define ADDRESS_R ADDRESS0|0x01 //读地址

#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

#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 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 //0 : Traditional comparator with hysteresis (default)
#define COMP_MODE_1 0x0010 //1 : Window comparator
#define COMP_POL_0  0x0000 //0 : Active low (default)
#define COMP_POL_1  0x0008 //1 : Active hig
#define COMP_LAT_0  0x0000 //0 : Non-latching comparator (default)
#define COMP_LAT_1  0x0040 //1 : Latching comparator
#define COMP_QUE_0  0x0000 //00 : Assert after one conversion
#define COMP_QUE_1  0x0001 //01 : Assert after two conversions
#define COMP_QUE_2  0x0002 //10 : Assert after four conversions
#define COMP_QUE_3  0x0003 //11 : Disable comparator (default)

#define MODE_0    0x0000 //0：连续转换模式
#define MODE_1    0x0100 //1：断电单发模式（默认）

unsigned int  Result[2];
unsigned char Readbuff[3];
unsigned char Writebuff[4];

//初始化IIC
void ads1115_IIC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;  //定义GPIO初始化结构体

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}

void Start(void)
{
SCL_1;
SDA_1;
delay_us(15);
SDA_0;
delay_us(15);
SCL_0;
delay_us(15);
}

void Stop(void)
{
SDA_0;
delay_us(15);
SCL_1;
delay_us(15);
SDA_1;
delay_us(15);
}

void ACK(void)
{
SDA_0;
   __nop();  __nop();
SCL_1;
delay_us(15);
SCL_0;
   __nop();  __nop();
SDA_1;
delay_us(15);
}

void NACK(void)
{
SDA_1;
   __nop();  __nop();
SCL_1;
delay_us(15);
SCL_0;
   __nop();  __nop();
SDA_0;
delay_us(15);
}

unsigned char Check(void)
{
unsigned char slaveack;

SDA_1;
   __nop();  __nop();
SCL_1;
   __nop();  __nop();
   __nop();  __nop();
slaveack = SDA_dat;
SCL_0;
   __nop();  __nop();
   __nop();  __nop();
if(slaveack)
return FALSE;
else
return TRUE;
}

void Write_1_Byte(unsigned char DataByte)
{
  unsigned int i;

for(i=0;i<8;i++)
{
if(DataByte&0x80) //if((DataByte<<i)&0x80)
SDA_1;
else
SDA_0;
__nop();
SCL_1;
__nop();
SCL_0;
__nop();
DataByte <<= 1;
}
SDA_1;
__nop();
}

unsigned char Write_N_Byte(unsigned char *writebuffer,unsigned char n)
{
  unsigned int i;

for(i=0;i<n;i++)
{
Write_1_Byte(*writebuffer);
if(Check())
{
   writebuffer ++;
}
else
{
Stop();
return FALSE;
}
  }
  Stop();
  return TRUE;
}

unsigned char Read_1_Byte(void)
{
  unsigned char data_Value = 0,FLAG,i;

  for(i=0;i<8;i++)
{
SDA_1;
__nop();
SCL_1;
__nop();
data_Value <<= 1;
FLAG=SDA_dat;
if( FLAG)
data_Value |= 0x01;
SCL_0;
__nop();
}
return data_Value;
}

void Read_N_Byte(unsigned int*readbuff, unsigned char n)
{
unsigned char i;

for(i=0;i<n;i++)
{
   readbuff=Read_1_Byte();
   if(i==n-1)
   NACK(); //不连续读字节
   else
   ACK(); //连续读字节
}
Stop();
}

void WriteWord(void)
{
unsigned int t;

Start(); //写入4个字节
do
{
t=Write_N_Byte(Writebuff,4);
}
while(t==0);
}

void ReadWord(void)
{
int t;

Start(); //写入2个字节
do
{
   t=Write_N_Byte(Readbuff,2);
}while(t==0);
Start();
//写入2个字节
   do
{
   t=Write_N_Byte(&Readbuff[2],1);
}
  while(t==0);
Read_N_Byte(Result,2); //读出2个字节
}

void InitADS1115(unsigned char CH)
{
unsigned int  Config;

if(CH == 0){Config = OS_1+MUX_3+PGA_2+DR_7+COMP_QUE_3+MODE_1;} //AINp=AIN2, AINn=AIN3 差分输入模式 FS = 2.048V
if(CH == 1){Config = OS_1+MUX_4+PGA_2+DR_7+COMP_QUE_3+MODE_1;} //AINp=AIN0, AINn=GND  单端输入模式 FS = 2.048V
if(CH == 2){Config = OS_1+MUX_5+PGA_2+DR_7+COMP_QUE_3+MODE_1;} //AINp=AIN1, AINn=GND  单端输入模式 FS = 2.048V
if(CH == 3){Config = OS_1+MUX_5+PGA_3+DR_7+COMP_QUE_3+MODE_1;} //AINp=AIN1, AINn=GND  单端输入模式 FS = 1.024V

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;
}

unsigned int ADS1115(unsigned char CH)
{
unsigned int ADC_DAT;

InitADS1115(CH);
WriteWord();
delay_ms(1);
ReadWord();

ADC_DAT=Result[0]*256+Result[1]; //转换值
  if(ADC_DAT >= 0xffff){ADC_DAT=0;}  //寄存器溢出
return ADC_DAT;
}