stm32f103c8t6麦克风检测声音代码
时间: 2024-05-28 09:07:50 浏览: 127
STM32F103C8T6是一款基于ARM Cortex-M3内核的微控制器,具有丰富的外设和功能,包括模数转换器(ADC)、通用定时器(TIM)、通用串行总线(USART)等等。麦克风检测声音代码需要结合具体的硬件电路和麦克风传感器型号来设计,以下是一个基于STM32F103C8T6的麦克风检测声音的代码示例:
1. 配置ADC采样和DMA传输:
```
#define ADC1_DR_Address ((u32)0x4001244C)
u16 ADC_ConvertedValue;
u16 ADC_ConvertedValue_Buffer[16];
void ADC_DMA_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_ConvertedValue_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 16;
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_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
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_55Cycles5);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
```
2. 通过计算RMS值判断声音强度:
```
#define RMS_SAMPLE_SIZE 16
u16 Get_RMS_Value(void)
{
u32 sum_square = 0;
for (int i = 0; i < RMS_SAMPLE_SIZE; i++)
{
sum_square += (u32)ADC_ConvertedValue_Buffer[i] * (u32)ADC_ConvertedValue_Buffer[i];
}
u16 rms_value = sqrt(sum_square / RMS_SAMPLE_SIZE);
return rms_value;
}
```
以上是一个简单的麦克风检测声音的代码示例,可以根据实际需求进行修改和优化。关于更详细的代码实现和硬件电路设计,建议参考相关技术资料和参考书籍。如果您有其他问题,请随时提出。