stm32h743高频

stm32h743高频读卡器是一种基于STM32H743芯片的RFID高频读卡器。它使用13.56 MHz的高频射频技术与RFID标签进行通信，并可以读取和解析标签中存储的数据。stm32h743高频读卡器包括读卡器天线、处理器、电源和接口以及控制单元等主要组件，这些组件共同实现了读卡器的功能和操作。用户可以通过命令对读卡器的存储空间进行存取，每次存储数据字节数不能超过16字节。例如，用户可以在指定的地址空间存储数据，并通过命令查询存储的数据。同时，stm32h743高频读卡器还支持向RFID标签写入用户数据的功能。

相关问题

STM32F4用HAL库等效采样高频信号代码

以下是一个基于STM32F4的HAL库的等效采样高频信号的代码示例：

#include "stm32f4xx_hal.h"

#define ADC_BUFFER_SIZE 1024 // ADC缓冲区大小
#define ADC_SAMPLING_FREQ 500000 // ADC采样频率
#define DAC_SAMPLING_FREQ 1000000 // DAC输出频率
#define ADC_FREQ_DIVIDER 2 // ADC采样频率分频器
#define DAC_FREQ_DIVIDER 5 // DAC输出频率分频器
#define ADC_PRESCALER 4 // ADC时钟预分频器
#define ADC_CLOCK_DIVIDER ADC_CLOCK_SYNC_PCLK_DIV4 // ADC时钟分频器

ADC_HandleTypeDef hadc1;
DAC_HandleTypeDef hdac;

static uint32_t adc_buffer[ADC_BUFFER_SIZE];
static uint32_t adc_buffer_index = 0;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DAC_Init(void);
static void MX_ADC1_Init(void);
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_DAC_Init();
  MX_ADC1_Init();

  HAL_DAC_Start(&hdac, DAC_CHANNEL_1);

  while (1)
  {
    uint32_t adc_value = adc_buffer[adc_buffer_index];
    HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, adc_value);

    adc_buffer_index++;
    if (adc_buffer_index >= ADC_BUFFER_SIZE) {
      adc_buffer_index = 0;
    }
  }
}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
  if (hadc->Instance == ADC1) {
    HAL_ADC_Stop_IT(hadc); // 停止ADC转换
    adc_buffer_index = 0; // 重置缓冲区索引
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 400;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  __HAL_RCC_ADC1_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  HAL_ADC_Start_IT(&hadc1); // 启动ADC转换并使用中断
}

static void MX_DAC_Init(void)
{
  DAC_ChannelConfTypeDef sConfig = {0};

  __HAL_RCC_DAC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }

  HAL_DAC_Start(&hdac, DAC_CHANNEL_1); // 启动DAC转换
}

static void MX_GPIO_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();
}

void Error_Handler(void)
{
  __disable_irq();
  while (1)
  {
  }
}

该代码中使用了STM32F4的ADC和DAC模块，ADC模块以高速采样频率采集信号并使用中断填充一个较大的缓冲区，DAC模块以较低的输出频率从该缓冲区中读取数据并输出。ADC和DAC模块的时钟分频器和分频器设置可以根据具体的信号频率进行调整。

stm32音频降噪程序

STM32音频降噪程序主要是通过数字信号处理的方式，对音频信号进行滤波处理，降低噪声的干扰，提高音频的质量。下面是一个简单的STM32音频降噪程序示例：

1. 初始化ADC和DMA模块，配置ADC的采样率和分辨率，设置DMA传输模式。

2. 在中断服务函数中，将DMA传输的音频数据进行FFT变换，得到音频频谱。

3. 对频谱进行滤波处理，去除高频噪声，并将滤波后的频谱进行IFFT反变换，得到降噪后的音频数据。

4. 将降噪后的音频数据通过DAC输出，完成音频降噪处理。

以下是一个基于STM32F4的音频降噪程序示例，供参考：

#include "stm32f4xx.h"
#include "arm_math.h"

#define FFT_SIZE 1024
#define SAMPLE_RATE 48000
#define BLOCK_SIZE 512

uint16_t micData[BLOCK_SIZE] = {0};
uint16_t outData[BLOCK_SIZE] = {0};

float32_t fftInput[FFT_SIZE] = {0};
float32_t fftOutput[FFT_SIZE] = {0};
float32_t ifftInput[FFT_SIZE] = {0};
float32_t ifftOutput[FFT_SIZE] = {0};
float32_t fftMag[FFT_SIZE/2] = {0};

arm_rfft_fast_instance_f32 fftInstance;
arm_rfft_fast_instance_f32 ifftInstance;

void ADC_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  ADC_InitTypeDef ADC_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
  
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  DMA_InitStructure.DMA_Channel = DMA_Channel_0;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)micData;
  DMA_InitStructure.DMA_BufferSize = BLOCK_SIZE;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
  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_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);
  
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfConversion = 1;
  ADC_Init(ADC1, &ADC_InitStructure);
  
  ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);
  
  ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
  ADC_DMACmd(ADC1, ENABLE);
  
  ADC_Cmd(ADC1, ENABLE);
  
  DMA_Cmd(DMA2_Stream0, ENABLE);
}

void DAC_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  DAC_InitTypeDef DAC_InitStructure;
  
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
  DAC_Init(DAC_Channel_1, &DAC_InitStructure);
  
  DAC_Cmd(DAC_Channel_1, ENABLE);
}

void FFT_Config(void)
{
  arm_rfft_fast_init_f32(&fftInstance, FFT_SIZE);
  arm_rfft_fast_init_f32(&ifftInstance, FFT_SIZE);
}

void FFT_Process(void)
{
  uint16_t i,j;
  
  for(i=0,j=0;i<BLOCK_SIZE;i++)
  {
    fftInput[j++] = micData[i];
    fftInput[j++] = 0;
  }
  
  arm_rfft_fast_f32(&fftInstance, fftInput, fftOutput, 0);
  arm_cmplx_mag_f32(fftOutput, fftMag, FFT_SIZE/2);
  
  for(i=0;i<FFT_SIZE/2;i++)
  {
    if(fftMag[i] > 1000)
    {
      fftOutput[i*2] = 0;
      fftOutput[i*2+1] = 0;
    }
  }
  
  arm_rfft_fast_f32(&ifftInstance, fftOutput, ifftInput, 1);
  
  for(i=0,j=0;i<BLOCK_SIZE;i++)
  {
    outData[i] = ifftOutput[j++];
  }
}

int main(void)
{
  ADC_Config();
  DAC_Config();
  FFT_Config();
  
  while (1)
  {
    FFT_Process();
    DAC_SetChannel1Data(DAC_Align_12b_R, outData[0]);
  }
}

以上代码仅供参考，具体的音频降噪算法和滤波器设计需要根据实际情况进行优化。