STM32F407 LIS3DSH 传感器通过 I2C 协议

如何解决STM32F407 LIS3DSH 传感器通过 I2C 协议

**我曾尝试使用 I2C 协议使用 LIS3DSH 传感器。我在STM32f手册上应用了程序。但它没有用。我只想接收 x 轴值。据此，GPIOD-12 小于 20 将开启。也许我无法意识到它的失败。有人帮我吗？ 提前，谢谢。

#include "stm32f4xx.h"                  // Device header
#include "string.h"
#include "stdio.h"
#include "stdlib.h"

#define SLAVE_ADRESS 0x1D   // LIS3DSH ADRESS

/*Prototype Functions*/
void I2C_START(I2C_TypeDef* I2Cx,uint8_t adress,uint8_t direction);
void I2C_WRITE(I2C_TypeDef* I2Cx,uint8_t data);
void I2C_STOP(I2C_TypeDef* I2Cx);
uint8_t I2C_READ_NACK(I2C_TypeDef* I2Cx);

// Valuables
int8_t x=0,y=0,z=0;

int main()
{
    // Definitions
    GPIO_InitTypeDef    GPIO_InitStructure;
    I2C_InitTypeDef         I2C_InitStructure;
    
    
    // Clock Buses Configurations
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOD |RCC_AHB1Periph_GPIOB,ENABLE );
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
  
    
    GPIO_InitStructure.GPIO_Pin     =   GPIO_Pin_5 |    GPIO_Pin_6 | GPIO_Pin_7; 
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType   =   GPIO_OType_PP;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
    
    GPIO_InitStructure.GPIO_Pin     =   GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType   =   GPIO_OType_PP;  
    GPIO_Init(GPIOD,&GPIO_InitStructure);
    
    GPIO_InitStructure.GPIO_Pin     =   GPIO_Pin_3; //SEL PIN ON LIS3DSH
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType   =   GPIO_OType_PP;
    GPIO_Init(GPIOE,&GPIO_InitStructure);
    
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Pin     =   GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed   =   GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType   =   GPIO_OType_OD;
    GPIO_InitStructure.GPIO_PuPd    = GPIO_PuPd_UP;
    GPIO_Init(GPIOB,&GPIO_InitStructure);
    
    GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_I2C1); // SCL
    GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_I2C1); // SDA
    
    I2C_InitStructure.I2C_Mode  =   I2C_Mode_I2C;
    I2C_InitStructure.I2C_ClockSpeed    =   100000;
    I2C_InitStructure.I2C_OwnAddress1   =   0x00;
    I2C_InitStructure.I2C_Ack   =   I2C_Ack_Disable;
    I2C_InitStructure.I2C_DutyCycle =   I2C_DutyCycle_2;
    I2C_InitStructure.I2C_AcknowledgedAddress   =   I2C_AcknowledgedAddress_7bit;
    I2C_Init(I2C1,&I2C_InitStructure);
    
    I2C_Cmd(I2C1,ENABLE);
    
     GPIO_SetBits(GPIOE,GPIO_PinSource3);  //SEL PIN ON LIS3DSH
    // 100 HZ 9.2 G LIS3DSH SENSOR.
     I2C_START(I2C1,SLAVE_ADRESS<<1,I2C_Direction_Transmitter);
     I2C_WRITE(I2C1,0x20);
     I2C_WRITE(I2C1,0x67);
     I2C_STOP(I2C1);
            
        
    while(1)
    {
        
        //  X  OUTPUT_L  
        I2C_START(I2C1,I2C_Direction_Transmitter);
        I2C_WRITE(I2C1,0x28);
        I2C_STOP(I2C1);
        
        // X  OUTPUT_L 
        I2C_START(I2C1,I2C_Direction_Receiver);
        x   =   I2C_READ_NACK(I2C1);
    
        if(x>20) GPIO_SetBits(GPIOD,GPIO_PinSource12);
    }
}
void I2C_START(I2C_TypeDef* I2Cx,uint8_t direction)
{   
    while(I2C_GetFlagStatus(I2Cx,I2C_FLAG_BUSY)); 
    
    I2C_GenerateSTART(I2Cx,ENABLE);  
    while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_MODE_SELECT)); // EVENT 5 : 
 
    I2C_Send7bitAddress(I2Cx,adress,direction);
 
    // EVENT 6 : ADDR BITI 1 
    if(direction == I2C_Direction_Transmitter)       
    while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
    else if(direction == I2C_Direction_Receiver)     
    while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
}

void I2C_WRITE(I2C_TypeDef* I2Cx,uint8_t data)
{
  // EVENT 8.1 : 
    //while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_BYTE_TRANSMITTING));
  
    I2C_SendData(I2Cx,data);
    
  // EVENT 8    : 
  while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_BYTE_TRANSMITTED));   
}

uint8_t I2C_READ_NACK(I2C_TypeDef* I2Cx)
{
    I2C_AcknowledgeConfig(I2C1,DISABLE);
    I2C_GenerateSTOP(I2Cx,ENABLE);
    
    // EVENT 7 :
    while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_BYTE_RECEIVED));
    
    return I2C_ReceiveData(I2Cx);
}
void I2C_STOP(I2C_TypeDef* I2Cx)
{
    I2C_GenerateSTOP(I2Cx,ENABLE);
}