stm32烟雾传感器代码
时间: 2023-09-05 14:09:54 浏览: 117
以下是基于STM32的烟雾传感器代码示例:
```c
#include "stm32f10x.h"
#include "stdio.h"
#define SMOKE_SENSOR_PIN GPIO_Pin_0
#define SMOKE_SENSOR_PORT GPIOA
void GPIO_Configuration(void);
void ADC_Configuration(void);
float Get_Smoke_Sensor_Value(void);
int main(void) {
float smoke_value = 0;
GPIO_Configuration();
ADC_Configuration();
while (1) {
smoke_value = Get_Smoke_Sensor_Value();
printf("Smoke sensor value: %.2f\n", smoke_value);
delay_ms(1000);
}
}
void GPIO_Configuration(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = SMOKE_SENSOR_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(SMOKE_SENSOR_PORT, &GPIO_InitStructure);
}
void ADC_Configuration(void) {
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
ADC_DeInit(ADC1);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & (ADC1->DR);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) & ADC_Value;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while (ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while (ADC_GetCalibrationStatus(ADC1));
}
float Get_Smoke_Sensor_Value(void) {
uint32_t adc_value = 0;
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while (!DMA_GetFlagStatus(DMA1_FLAG_TC1));
DMA_ClearFlag(DMA1_FLAG_TC1);
adc_value = ADC_Value[0];
return ((float) adc_value / 4096.0) * 3.3;
}
```
在这个示例程序中,我们使用了一个烟雾传感器,它连接到STM32的PA0引脚上。我们使用了ADC来读取来自传感器的模拟值,并将其转换为烟雾传感器的电压值。然后,我们将该电压值打印到串行端口上。在这个示例程序中,我们使用了DMA来自动将ADC值转移到我们的变量中,因此我们不必在中断中处理它们。
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