读出来的数据各位全为1

1万 · 2022-6-16 21:09

使用STM32F103C8T6开发板加SGP30传感器检测CO2与TVOC的浓度，只实现最简单的数据读取，但是读出来的数据各位全为1

2万 · 2022-6-16 21:11

不是有效数据?

1万 · 2022-6-16 21:15

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

1万 · 2022-6-16 21:17

#ifndef __SGP30_H

#define __SGP30_H

#include "myiic.h"

void Read_Air_Quality(u16 *co2, u16 *tvoc);

void SGP30_Init(void);

#endif

1万 · 2022-6-16 21:20

#include "sgp30.h"

#include "delay.h"

#include "OLED_IIC.h"

void SGP30_Init(void)

{

      IIC_Init();



      IIC_Start();

      IIC_Send_Byte(0x58);

      IIC_Wait_Ack();

      IIC_Send_Byte(0x20);

      IIC_Wait_Ack();

      IIC_Send_Byte(0x03);

      IIC_Wait_Ack();

      IIC_Stop();



      IIC_Start();

      IIC_Send_Byte(0x58);

      IIC_Wait_Ack();

      IIC_Send_Byte(0x20);

      IIC_Wait_Ack();

      IIC_Send_Byte(0x08);

      IIC_Wait_Ack();

      IIC_Stop();

}

void Read_Air_Quality(u16 *co2, u16 *tvoc)

{

      u8 co2_high = 0;

      u8 co2_low = 0;

      u8 tvoc_high = 0;

      u8 tvoc_low = 0;



      delay_ms(15000);



      IIC_Start();

      IIC_Send_Byte(0x59);

      IIC_Wait_Ack();

      co2_high = IIC_Read_Byte(0);

      co2_low = IIC_Read_Byte(0);

      IIC_Read_Byte(0);

      tvoc_high = IIC_Read_Byte(0);

      tvoc_low = IIC_Read_Byte(0);

      IIC_Read_Byte(0);

      IIC_Stop();



      *co2 = (co2_high<<8)|co2_low;

      *tvoc = (tvoc_high<<8)|tvoc_low;

}

1万 · 2022-6-16 21:27

#include "stm32f10x.h"

#include "delay.h"

#include "sys.h"

#include <stdio.h>

#include <string.h>

#include "OLED_IIC.h"

#include "dht11.h"

#include "usart.h"

#include "sgp30.h"

/************************************************

STM32F103C8T6

12864_IIC_OLED_STM32驱动

OLED显示驱动模块: SSD1306

SGP30传感器

IIC: SCL, SDA

对应接口: PB0, PB1

SGP30:VCC, SCL, SDA, GND

对应接口: 3V, PB6, PB7, GND

CH340:TXD, RXD, GND

对应接口: PA10, PA9, GND

************************************************/

int main(void)

{

      u16 co2;

      u16 tvoc;

      delay_init();                         //延时初始化

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级



      uart_init(9600);

      SGP30_Init();

      OLED_Init();                   //初始化OLED

  initial_olcd();                //初始化

      clear_screen();                      //清屏



      delay_ms(50000);

      delay_ms(50000);

      delay_ms(50000);

      while(1)

      {

            Read_Air_Quality(&co2, &tvoc);



            USART_SendData(USART1, 1);

            delay_ms(12);

            USART_SendData(USART1, co2>>8);

            delay_ms(12);

            USART_SendData(USART1, 2);

            delay_ms(12);

            USART_SendData(USART1, co2&0x00ff);

            delay_ms(12);

            USART_SendData(USART1, 3);

            delay_ms(12);

            USART_SendData(USART1, tvoc>>8);

            delay_ms(12);

            USART_SendData(USART1, 4);

            delay_ms(12);

            USART_SendData(USART1, tvoc&0x00ff);

            delay_ms(12);

            while(USART_GetFlagStatus(USART1, USART_FLAG_TC)!=SET);

            USART_RX_STA = 0;



            display_number_16x8(1,1,co2);

            display_number_16x8(3,1,tvoc);

      }

}