MQ-135空气质量传感器驱动
本帖最后由 bigfanofloT 于 2017-5-16 19:42 编辑一、MQ-135空气质量传感器介绍
参考此帖http://club.gizwits.com/thread-6484-1-1.html
二、硬件连线
根据Nucleo-F767ZI原理图，我们选择Arduino UNO接口的A1，即STM32F767ZIT6的PC0，ADC1通道10
三、完整源码
头文件如下：
/**
***********************************
* @file ADC/ADC_RegularConversion_Polling/Inc/main.h
* @authorMCD Application Team
* @version V1.0.2
* @date 30-December-2016
* @brief Header for main.c module
***********************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***********************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MAIN_H
#define __MAIN_H
/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"
#include "STM32F7xx_hal_adc.h"
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* User can use this section to tailor ADCx instance used and associated
resources */
/* Definition for ADCx clock resources */
#define ADCx ADC1
#define ADCx_CLK_ENABLE() __HAL_RCC_ADC1_CLK_ENABLE()
#define ADCx_CHANNEL_GPIO_CLK_ENABLE()__HAL_RCC_GPIOC_CLK_ENABLE()
#define ADCx_FORCE_RESET() __HAL_RCC_ADC_FORCE_RESET()
#define ADCx_RELEASE_RESET() __HAL_RCC_ADC_RELEASE_RESET()
/* Definition for ADCx Channel Pin */
#define ADCx_CHANNEL_PIN GPIO_PIN_0//对应板卡A1
#define ADCx_CHANNEL_GPIO_PORT GPIOC
/* Definition for ADCx's Channel */
#define ADCx_CHANNEL ADC_CHANNEL_10
#define SAMPLINGTIME ADC_SAMPLETIME_3CYCLES
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void MQ135_Init(void);
int MQ135_GetValue(void);
#endif /* __MAIN_H */
/*********** (C) COPYRIGHT STMicroelectronics ***END OF FILE**/
源文件如下：
/**
***********************************
* @file ADC/ADC_RegularConversion_Polling/Src/main.c
* @authorMCD Application Team
* @version V1.0.2
* @date 30-December-2016
* @brief This example describes how to use Polling mode to convert data.
***********************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***********************************
*/
/* Includes ------------------------------------------------------------------*/
#include "hal_mq135.h"
/** @addtogroup STM32F7xx_HAL_Examples
* @{
*/
/** @addtogroup ADC_RegularConversion_Polling
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* ADC handler declaration */
ADC_HandleTypeDef AdcHandle;
void MQ135_Init(void)
{
ADC_ChannelConfTypeDef sConfig;
GPIO_InitTypeDef GPIO_InitStruct;
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* ADC Periph clock enable */
ADCx_CLK_ENABLE();
/* Enable GPIO clock ******************/
ADCx_CHANNEL_GPIO_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* ADC Channel GPIO pin configuration */
GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);
/*##-1- Configure the ADC peripheral #######################################*/
AdcHandle.Instance = ADCx;
ADCx_CLK_ENABLE() ;
ADCx_CHANNEL_GPIO_CLK_ENABLE();
AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;
AdcHandle.Init.Resolution = ADC_RESOLUTION_12B;
AdcHandle.Init.ScanConvMode = DISABLE; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
AdcHandle.Init.ContinuousConvMode = DISABLE; /* Continuous mode disabled to have only 1 conversion at each conversion trig */
AdcHandle.Init.DiscontinuousConvMode = DISABLE; /* Parameter discarded because sequencer is disabled */
AdcHandle.Init.NbrOfDiscConversion = 0;
AdcHandle.Init.ExternalTrigConvEdge= ADC_EXTERNALTRIGCONVEDGE_NONE; /* Conversion start trigged at each external event */
AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
AdcHandle.Init.NbrOfConversion = 1;
AdcHandle.Init.DMAContinuousRequests = DISABLE;
AdcHandle.Init.EOCSelection = DISABLE;
if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
{
/* ADC initialization Error */
}
/*##-2- Configure ADC regular channel ######################################*/
sConfig.Channel = ADCx_CHANNEL; /* Sampled channel number */
sConfig.Rank = 1; /* Rank of sampled channel number ADCx_CHANNEL */
sConfig.SamplingTime = ADC_SAMPLETIME_56CYCLES; /* Sampling time (number of clock cycles unit) */
sConfig.Offset = 0; /* Parameter discarded because offset correction is disabled */
if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
{
/* Channel Configuration Error */
}
if (HAL_ADC_Start(&AdcHandle) != HAL_OK)
{
/* Start Conversation Error */
}
}
//just return adc raw value.
int MQ135_GetValue(void)
{
if (HAL_ADC_Start(&AdcHandle) != HAL_OK)
{
}
return HAL_ADC_GetValue(&AdcHandle);
}
/**
* @}
*/
/**
* @}
*/
/*********** (C) COPYRIGHT STMicroelectronics ***END OF FILE**/
本系列帖子目录：
http://club.gizwits.com/thread-6544-1-1.html
请问一下这个芯片如果是STM32F103C8的，驱动里面的串口是不是直接对应改一改还有hal库换一下就能直接用？
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