ADS112驱动问题，延时较长

2019-07-20 01:21发布

源码如下：

.C文件：

#include "ADS112.h"
#include "myiic.h"
#include "sys.h"
#include "stdio.h"
#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"
#define ADS112_ST_IO GPIOE
#define ADS112_ST_PIN GPIO_Pin_0

#define ADS112_ST_UP GPIO_SetBits(ADS112_ST_IO,ADS112_ST_PIN)
#define ADS112_ST_DOWN GPIO_SetBits(ADS112_ST_IO,ADS112_ST_PIN)

void ADS112_GPIO_Init(void);
void ADS112_Start_Convertion(void);
u16 ADS112_Get_Convertion_Data(void);
void ADS112_Write_REG1(u8 rate,u8 IF_turbo,u8 Convertion_mode);
void ADS112_Write_REG0(void);
u8 ADS112_Read_Reg(u8 address);
void ADS112_Init(void);
void ADS112_Reset(void);
u8 ADS112_IF_New_Data(void);

void ADS112_GPIO_Init(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//Ê¹ÄÜGPIOBÊ±ÖÓ

  //GPIOB8,B9³õÊ¼»¯ÉèÖÃ
  GPIO_InitStructure.GPIO_Pin = ADS112_ST_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//??????
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//??
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_SetBits(GPIOE,GPIO_Pin_0);
}

u16 ADS112_Get_Convertion_Data(void)
{
u16 data_1=0;
u8 data_2=0;
IIC_Start();
IIC_Send_Byte(0x80);
IIC_Wait_Ack();
IIC_Send_Byte(0x10);
IIC_Wait_Ack();

IIC_Start();
IIC_Send_Byte(0x81);
IIC_Wait_Ack();
data_1=IIC_Read_Byte(0);
IIC_Ack();
data_2=IIC_Read_Byte(0);
IIC_Stop();
data_1<<=8;
return data_1+data_2;
}

void ADS112_Write_Reg(u8 address,u8 data)
{
u8 address_temp=0x40;
address<<=2;
address_temp|=address;
IIC_Start();
IIC_Send_Byte(0x80);
IIC_Wait_Ack();
IIC_Send_Byte(address_temp);

IIC_Wait_Ack();
IIC_Send_Byte(data);
IIC_Wait_Ack();

IIC_Stop();
}

u8 ADS112_Read_Reg(u8 address)
{
u8 data=0;
u8 address_temp=0x20;
address<<=2;
address_temp|=address;

IIC_Start();
IIC_Send_Byte(0x80);

IIC_Wait_Ack();
//usart4.printf("ack!");
IIC_Send_Byte(address_temp);

IIC_Wait_Ack();

IIC_Start();

IIC_Send_Byte(0x81);

IIC_Wait_Ack();

data=IIC_Read_Byte(0);

IIC_Stop();

return data;
}

u8 ADS112_IF_New_Data(void)//0  :ÐÂÊý¾Ý  1£º¾ÉÊý¾Ý
{
u8 data=1;
data=GPIO_ReadInputDataBit(ADS112_ST_IO,ADS112_ST_PIN);
return data;
}

void ADS112_Write_REG0()
{
u8 data=0xB1;
ADS112_Write_Reg(0,data);
}

/**********************************
ÉèÖÃADS112µÄ×ª»»ËÙÂÊ£¬ÊÇ·ñturbo£¬×ª»»Ä£Ê½
ÉèÖÃ×ª»»ËÙÂÊÐèÒª¸ørate¸³ÖµÒÔÏÂ¿ÉÑ¡ÊýÖµ£º
000 = 20 SPS
001 = 45 SPS
010 = 90 SPS
011 = 175 SPS
100 = 330 SPS
101 = 600 SPS
110 = 1000 SPS
ÉèÖÃturboÐèÒª¸ø IF_turbo ¸³Öµ£º
0£ºÕý³£Ä£Ê½
1£ºturboÄ£Ê½

ÉèÖÃÊÇ·ñÁ¬Ðø×ª»»ÐèÒª¸øConvertion_mode ¸³Öµ
0£ºµ¥´Î×ª»»Ä£Ê½
1£ºÁ¬Ðø×ª»»Ä£Ê½
***********************************/
void ADS112_Write_REG1(u8 rate,u8 IF_turbo,u8 Convertion_mode)
{
u8 data=0x00;
rate<<=5;
data|=rate;
IF_turbo<<=4;
data|=IF_turbo;
Convertion_mode<<=3;
data|=Convertion_mode;

usart4.printf("data write ro REG1 is %d ",data);
ADS112_Write_Reg(1,data);
}
//0000 100x

void ADS112_Start_Convertion(void)
{
IIC_Start();
IIC_Send_Byte(0x80);
IIC_Wait_Ack();
IIC_Send_Byte(0x08);
IIC_Stop();
}
void ADS112_Reset(void)
{
IIC_Start();
IIC_Send_Byte(0x80);
IIC_Wait_Ack();
IIC_Send_Byte(0x07);
IIC_Stop();
}
void ADS112_Set_mdoe(u8 mode)
{
      ADS112_Write_REG0();
      ADS112_Write_REG1(0x06,1,mode);
}

u16 ADS112_Get_Once_data(void)
{
ADS112_Start_Convertion();
delay_ms(60);
return ADS112_Get_Convertion_Data();
}

u16 ADS112_Get_Continous_data(void)
{
static u8 First_Flag=0;
static u16 data;
if(First_Flag==0)
{
      First_Flag=1;
      ADS112_Start_Convertion();
      data=ADS112_Get_Convertion_Data();
      return data;
}
else
{
      data=ADS112_Get_Convertion_Data();
      return data;
}
}

.h文件：

#ifndef ADS112_H
#define ADS112_H
#include "sys.h"

void ADS112_GPIO_Init(void);

u16 ADS112_Get_Convertion_Data(void);

u16 ADS112_Get_Once_data(void);

u16 ADS112_Get_Continous_data(void);

u8 ADS112_Read_Reg(u8 address);

void ADS112_Set_mdoe(u8 mode);

void ADS112_Start_Convertion(void);
#endif

现在有一个问题，就是单次转换模式，必须要有60ms以上的延时，否则无法正常工作，请问各位大神，有没有办法改善，或者说，ADS112本身就是这个速度？

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