2024/1/2作业

成果

代码

main .c====================

#include "sqi.h"

#include "si7006.h"

unsigned int num[10] = {0xFC, 0x60, 0xDA,0xF2,0x66,0xB6,0xBE,0XE0,0xFE,0xF6};

//unsigned int wei[5]={0x10,0x20,0x40,0x80,0xF0};

unsigned short hum;

short tem;

extern void printf(const char *fmt, ...);

int main()

{

    int a,b,c,d;

   key1_it_config();

   si7006_init();

   SPI_init();

   /*

     int i,j;

   while(1){

    for(i=0;i<10;i++)

    {

        for(j=0;j<5;j++)

        {

            SPI_write(wei[j]);

      SPI_write(num[i]);

      NSS_OUTPUT_L();

      delay(20);

      NSS_OUTPUT_H();

      delay(100);

        }

    if(j==5)

   {

     j=0;

   }

    }

   }*/

 

   while (1)

   {

     hum=si7006_read_hum_data(0x40,0xE5);

     tem=si7006_read_temp_data(0x40,0xE5);

     hum=125*hum/65536-6;

     tem=175.72*tem/65536-46.85;

     printf("hum=%d\n",hum);

     printf("tem=%d\n",tem);

     //获取数据的各个数

     a=hum/10;

     b=hum%10;

     c=tem/10;

     d=tem%10;

     for(int i=0;i<10000;i++)

     {

      SPI_write(0x80);

      SPI_write(num[a]);

      NSS_OUTPUT_L();

      delay(1);

      NSS_OUTPUT_H();

   

      SPI_write(0x40);

      SPI_write(num[b]);

      NSS_OUTPUT_L();

      delay(1);

      NSS_OUTPUT_H();

   

      SPI_write(0x20);

      SPI_write(num[c]);

      NSS_OUTPUT_L();

      delay(1);

      NSS_OUTPUT_H();

     

      SPI_write(0x10);

      SPI_write(num[d]);

      NSS_OUTPUT_L();

      delay(1);

      NSS_OUTPUT_H();

      delay(2000);

     }

   }

}

iic.c=============================

#include"iic.h"

#include"sqi.h"

void i2c_init(void)//i2c初始化

{

    RCC->MP_AHB4ENSETR|=(0x1<<5);

    GPIOF->MODER &=(~(0xF<<28));

    GPIOF->MODER |=(0x5<<28);

    GPIOF->OTYPER &=(~(0x3<<14));

    GPIOF->OSPEEDR|=(0xF<<28);

    GPIOF->PUPDR &=(~(0xF<<28));

    //空闲拉高

    I2C_SDA_H;

    I2C_SCL_H;

}

void i2c_start(void)//起始信号发送

{

   SET_SDA_OUT;

   //空闲拉高

   I2C_SCL_H;

   I2C_SDA_H;

   //形成下降沿

   delay(20);

   I2C_SDA_L;

   delay(20);

   I2C_SCL_L;

}

void i2c_stop(void)//终止信号发送

{

    SET_SDA_OUT;

   

   I2C_SCL_L;

    delay(20);

    I2C_SDA_L;

   delay(20);

   I2C_SCL_H;

   delay(20);

   I2C_SDA_H;

}

void i2c_write_byte(unsigned char data)//写入一个字节

{

SET_SDA_OUT;

unsigned int i;

for(i=0;i<8;i++)

{

    I2C_SCL_L;

    delay(20);

    if(data&0x80)

    {

        I2C_SDA_H;

    }else

    {

        I2C_SDA_L;

    }

    delay(20);

    I2C_SCL_H;

    delay(20);

    delay(20);

    data=data<<1;

}

 

}

unsigned char i2c_read_byte(unsigned char ack)//读取一个字节

{

     unsigned int i;

     unsigned char dat;

     SET_SDA_IN;

     for ( i = 0; i < 8; i++)

     {

        I2C_SCL_L;

        delay(20);

        delay(20);

        I2C_SCL_H;

        delay(20);

        dat=dat<<1;

        if (I2C_SDA_READ)

        {

            dat|=1;

        }else{

            dat &=(~0x1);

        }

        delay(20);

     }

     if(ack)

     {

          i2c_nack();

     }else{

        i2c_ack();

     }

     return dat;

     

}

unsigned char i2c_wait_ack(void)//等待应答信号

{

    I2C_SCL_L;

    I2C_SDA_H;

    delay(20);

    SET_SDA_IN;

    delay(20);

    delay(20);

    I2C_SCL_H;

    if (I2C_SDA_READ)

    {

        return 1;

    }

      I2C_SCL_L;

      return 0;

   

}

void i2c_ack(void)//发送应答信号

{

    SET_SDA_OUT;

    I2C_SCL_L;

    delay(20);

    I2C_SDA_L;

    delay(20);

    I2C_SCL_H;

    delay(20);

    delay(20);

    I2C_SCL_L;

}

void i2c_nack(void)//发送信号信号

{

    SET_SDA_OUT;

    I2C_SCL_L;

    delay(20);

    I2C_SDA_H;

    delay(20);

    I2C_SCL_H;

    delay(20);

    delay(20);

    I2C_SCL_L;

}

si7006.c=======================================================================

#include "sqi.h"

#include "si7006.h"

#include "iic.h"

void si7006_init(void)

{

    i2c_init();

    i2c_start();

    i2c_write_byte(0x40<<1|0);

    i2c_wait_ack();

    i2c_write_byte(0xE6);

    i2c_wait_ack();

    i2c_write_byte(0x3A);

    i2c_wait_ack();

    i2c_stop();

}

unsigned short si7006_read_hum_data(unsigned char slave_addr,unsigned char cmd_code )

{

  unsigned short dat;

  unsigned char dat_h,dat_l;

  i2c_start();

  i2c_write_byte(slave_addr<<1|0);

  i2c_wait_ack();

  i2c_write_byte(cmd_code);

  i2c_wait_ack();

  i2c_start();

  i2c_write_byte(slave_addr<<1|1);

  i2c_wait_ack();

  delay(100);

  dat_h=i2c_read_byte(0);

  dat_l=i2c_read_byte(1);

  i2c_stop();

  dat=(dat_h<<8)|dat_l;

  return dat;

 

}

 short si7006_read_temp_data(unsigned char slave_addr,unsigned char cmd_code)

 {

  unsigned short dat;

  unsigned char dat_h,dat_l;

  i2c_start();

  i2c_write_byte(slave_addr<<1|0);

  i2c_wait_ack();

  i2c_write_byte(cmd_code);

  i2c_wait_ack();

  i2c_start();

  i2c_write_byte(slave_addr<<1|1);

  i2c_wait_ack();

  delay(100);

  dat_h=i2c_read_byte(0);

  dat_l=i2c_read_byte(1);

  i2c_stop();

  dat=(dat_h<<8)|dat_l;

  return dat;

 }

spi.c=================================================

#include "sqi.h"

void delay(unsigned int ms)

{

    int i,j;

    for(i=0;i

    {

        for(j=0;j<100;j++);

    }

}

//初始化

void SPI_init(void)

{

    //设置时钟使能

    RCC->MP_AHB4ENSETR |= (0x1<<4);

    //设置输出

    //pe12 sck 输出

    GPIOE->MODER &= (~(0x03<<24));

    GPIOE->MODER |= (0x01<<24);

    GPIOE->OTYPER &=(~(0x3<<24));

    GPIOE->PUPDR &=(~(0x3<<24));

    //pe13 miso 输入

    GPIOE->MODER &= (~(0x03<<26));

    GPIOE->MODER |= (0x00<<26);

     GPIOE->OTYPER &=(~(0x3<<26));

    GPIOE->PUPDR &=(~(0x3<<26));

    //pe14 mosi 输出

    GPIOE->MODER &= (~(0x03<<28));

    GPIOE->MODER |= (0x01<<28);

     GPIOE->OTYPER &=(~(0x3<<28));

    GPIOE->PUPDR &=(~(0x3<<28));

    //pe11 nss 输出

    GPIOE->MODER &= (~(0x03<<22));

    GPIOE->MODER |=(0x01<<22);

     GPIOE->OTYPER &=(~(0x3<<28));

    GPIOE->PUPDR &=(~(0x3<<28));

    //pe12 pe11输出低电平

    SOCK_OUTPUT_L();

    NSS_OUTPUT_L();

}

//spi发送数据

void SPI_write(unsigned char dat)

{

   unsigned char i;

   for ( i = 0; i < 8; i++)

   {

       if(dat&0x01)

       {

          //MOSI高位

          MOSI_OUTPUT_H();

       }else{

          //MOSI低位

         MOSI_OUTPUT_L();

       }

       dat>>=1;

     //时钟线先初始低

     //初始化为低有数据输入时为高

     SOCK_OUTPUT_L();

     delay(200);

     SOCK_OUTPUT_H();

     delay(200);

   }

}

========================iic.h

#ifndef __IIC_H__

#define __IIC_H__

#include "stm32mp1xx_gpio.h"

#include "stm32mp1xx_rcc.h"

#define SET_SDA_OUT do{GPIOF->MODER &= (~(0x3<<30));GPIOF->MODER |=(0x1<<30);} while (0);

#define SET_SDA_IN  do{GPIOF->MODER &= (~(0x3<<30));}while(0);

#define I2C_SCL_H do{GPIOF->BSRR |= (0x1 << 14);} while (0);

#define I2C_SCL_L do{GPIOF->BRR |= (0x1 << 14);} while (0);

#define I2C_SDA_H do{GPIOF->BSRR |= (0x1 << 15);} while (0);

#define I2C_SDA_L do{GPIOF->BRR |= (0x1 << 15);} while (0);

#define I2C_SDA_READ  (GPIOF->IDR &(0x1 << 15))

void i2c_init(void);//i2c初始化

void i2c_start(void);//起始信号发送

void i2c_stop(void);//终止信号发送

void i2c_write_byte(unsigned char data);//写入一个字节

unsigned char i2c_read_byte(unsigned char ack);//读取一个字节

unsigned char i2c_wait_ack(void);//等待应答信号

void i2c_ack(void);//发送应答信号

void i2c_nack(void);//发送信号信号

#endif

si70006.h===============================

#ifndef __SI7006_H

#define __SI7006_H

#include "iic.h"

#define SI7006_SLAVE 0x40

void si7006_init(void);

unsigned short si7006_read_hum_data(unsigned char slave_addr, unsigned char cmd_code);

short si7006_read_temp_data(unsigned char slave_addr, unsigned char cmd_code);

#endif

spi.h======================================

#ifndef __SQI_HEAD__

#define __SQI_HEAD__

#include "stm32mp1xx_gpio.h"

#include "stm32mp1xx_rcc.h"

//delay时钟函数

void delay(unsigned int ms);

//MOSI对应的引脚输出高低电平的信号PE14

#define MOSI_OUTPUT_H() do{GPIOE->ODR |= (0x1<<14);}while(0)

#define MOSI_OUTPUT_L() do{GPIOE->ODR &= (~(0x1<<14));}while(0)

//PE11锁存引脚输出高低电平

#define NSS_OUTPUT_H() do{GPIOE->ODR |= (0x1<<11);}while(0)

#define NSS_OUTPUT_L() do{GPIOE->ODR &= (~(0x1<<11));}while(0)

//PE12时钟信号输出高低电平

#define SOCK_OUTPUT_H() do{GPIOE->ODR |= (0x1<<12);}while(0)

#define SOCK_OUTPUT_L() do{GPIOE->ODR &= (~(0x1<<12));}while(0)

//初始化

void SPI_init(void);

//spi发送数据

void SPI_write(unsigned char dat);

#endif

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