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524 lines
15 KiB
C
524 lines
15 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2025 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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#include <stdio.h>
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#include <qfplib-port.h>
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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typedef struct {
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int32_t value : 18;
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} sample_t;
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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#define SAMPLE_COUNT (256) // Sample count per half-transfer
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#define SAMPLES_PER_REPORT (48000) // Report every second given our 48 kHz rate
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#define MIC_OFFSET_DB ( 0.f) // Linear offset
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#define MIC_SENSITIVITY (-26.f) // dBFS value expected at MIC_REF_DB
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#define MIC_REF_DB ( 94.f) // dB where sensitivity is specified
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#define MIC_BITS (18)
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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SPI_HandleTypeDef hspi1;
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DMA_HandleTypeDef hdma_spi1_rx;
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DMA_HandleTypeDef hdma_spi1_tx;
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UART_HandleTypeDef huart2;
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/* USER CODE BEGIN PV */
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static const uint8_t I2S_Frame_Buffer[8] = {
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0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF
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};
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static uint8_t I2S_Receive_Buffer[SAMPLE_COUNT * 2 * sizeof(sample_t)];
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float ln10;
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float MIC_REF_AMPL;
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static float DB_Sum_Squares = 0.f;
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static unsigned DB_Count = 0;
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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static void MX_DMA_Init(void);
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static void MX_SPI1_Init(void);
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static void MX_USART2_UART_Init(void);
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/* USER CODE BEGIN PFP */
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static HAL_StatusTypeDef HAL_SPI_TransmitReceive_DMA_Mixed(
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SPI_HandleTypeDef *hspi,
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const uint8_t *pTxData,
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uint8_t *pRxData,
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uint16_t TxSize,
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uint16_t RxSize);
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static void SPI_DMATransmitReceiveCplt(DMA_HandleTypeDef *hdma);
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static void SPI_DMAHalfTransmitReceiveCplt(DMA_HandleTypeDef *hdma);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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int __io_putchar(int ch)
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{
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uint8_t buf = ch;
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HAL_UART_Transmit(&huart2, &buf, sizeof(buf), HAL_TIMEOUT);
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return buf;
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}
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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ln10 = qfp_fln(10.f);
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MIC_REF_AMPL = qfp_fmul(qfp_int2float((1 << (MIC_BITS - 1)) - 1),
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qfp_fpow(10.f, MIC_SENSITIVITY / 20.f));
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_DMA_Init();
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MX_SPI1_Init();
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MX_USART2_UART_Init();
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/* USER CODE BEGIN 2 */
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__enable_irq();
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HAL_SPI_TransmitReceive_DMA_Mixed(&hspi1,
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I2S_Frame_Buffer,
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I2S_Receive_Buffer,
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sizeof(I2S_Frame_Buffer),
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sizeof(I2S_Receive_Buffer));
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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HAL_GPIO_WritePin(IDLE_GPIO_Port, IDLE_Pin, GPIO_PIN_SET);
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__WFI();
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
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RCC_OscInitStruct.MSIState = RCC_MSI_ON;
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RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_9;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief SPI1 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_SPI1_Init(void)
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{
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/* USER CODE BEGIN SPI1_Init 0 */
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/* USER CODE END SPI1_Init 0 */
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/* USER CODE BEGIN SPI1_Init 1 */
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/* USER CODE END SPI1_Init 1 */
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/* SPI1 parameter configuration*/
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hspi1.Instance = SPI1;
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hspi1.Init.Mode = SPI_MODE_MASTER;
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hspi1.Init.Direction = SPI_DIRECTION_2LINES;
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hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
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hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
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hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
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hspi1.Init.NSS = SPI_NSS_SOFT;
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hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
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hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
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hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
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hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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hspi1.Init.CRCPolynomial = 7;
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hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
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hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
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if (HAL_SPI_Init(&hspi1) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN SPI1_Init 2 */
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/* USER CODE END SPI1_Init 2 */
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}
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/**
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* @brief USART2 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_USART2_UART_Init(void)
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{
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/* USER CODE BEGIN USART2_Init 0 */
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/* USER CODE END USART2_Init 0 */
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/* USER CODE BEGIN USART2_Init 1 */
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/* USER CODE END USART2_Init 1 */
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huart2.Instance = USART2;
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huart2.Init.BaudRate = 115200;
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huart2.Init.WordLength = UART_WORDLENGTH_8B;
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huart2.Init.StopBits = UART_STOPBITS_1;
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huart2.Init.Parity = UART_PARITY_NONE;
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huart2.Init.Mode = UART_MODE_TX_RX;
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huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart2.Init.OverSampling = UART_OVERSAMPLING_16;
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huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
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huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
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huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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if (HAL_UART_Init(&huart2) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USART2_Init 2 */
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/* USER CODE END USART2_Init 2 */
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}
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/**
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* Enable DMA controller clock
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*/
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static void MX_DMA_Init(void)
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{
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/* DMA controller clock enable */
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__HAL_RCC_DMA1_CLK_ENABLE();
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/* DMA interrupt init */
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/* DMA1_Channel1_IRQn interrupt configuration */
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HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
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/* DMA1_Channel2_3_IRQn interrupt configuration */
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HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* USER CODE BEGIN MX_GPIO_Init_1 */
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/* USER CODE END MX_GPIO_Init_1 */
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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__HAL_RCC_GPIOD_CLK_ENABLE();
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(LED_RED_GPIO_Port, LED_RED_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(IDLE_GPIO_Port, IDLE_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin : LED_GREEN_Pin */
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GPIO_InitStruct.Pin = LED_GREEN_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(LED_GREEN_GPIO_Port, &GPIO_InitStruct);
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/*Configure GPIO pin : Joystick_Pin */
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GPIO_InitStruct.Pin = Joystick_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(Joystick_GPIO_Port, &GPIO_InitStruct);
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/*Configure GPIO pin : LED_BLUE_Pin */
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GPIO_InitStruct.Pin = LED_BLUE_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(LED_BLUE_GPIO_Port, &GPIO_InitStruct);
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/*Configure GPIO pin : LED_RED_Pin */
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GPIO_InitStruct.Pin = LED_RED_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(LED_RED_GPIO_Port, &GPIO_InitStruct);
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/*Configure GPIO pin : IDLE_Pin */
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GPIO_InitStruct.Pin = IDLE_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
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HAL_GPIO_Init(IDLE_GPIO_Port, &GPIO_InitStruct);
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/* USER CODE BEGIN MX_GPIO_Init_2 */
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/* USER CODE END MX_GPIO_Init_2 */
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}
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/* USER CODE BEGIN 4 */
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HAL_StatusTypeDef HAL_SPI_TransmitReceive_DMA_Mixed(
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SPI_HandleTypeDef *hspi,
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const uint8_t *pTxData,
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uint8_t *pRxData,
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uint16_t TxSize,
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uint16_t RxSize)
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{
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HAL_StatusTypeDef errorcode = HAL_OK;
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assert_param(IS_SPI_DMA_HANDLE(hspi->hdmarx));
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assert_param(IS_SPI_DMA_HANDLE(hspi->hdmatx));
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assert_param(IS_SPI_DIRECTION_2LINES(hspi->Init.Direction));
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__HAL_LOCK(hspi);
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hspi->State = HAL_SPI_STATE_BUSY_TX_RX;
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hspi->ErrorCode = HAL_SPI_ERROR_NONE;
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hspi->pTxBuffPtr = (uint8_t *)pTxData;
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hspi->TxXferSize = TxSize;
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hspi->TxXferCount = TxSize;
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hspi->pRxBuffPtr = (uint8_t *)pRxData;
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hspi->RxXferSize = RxSize;
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hspi->RxXferCount = RxSize;
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hspi->RxISR = NULL;
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hspi->TxISR = NULL;
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/* Reset the threshold bit */
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CLEAR_BIT(hspi->Instance->CR2, SPI_CR2_LDMATX | SPI_CR2_LDMARX);
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/* Set RX Fifo threshold according the reception data length: 8bit */
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SET_BIT(hspi->Instance->CR2, SPI_RXFIFO_THRESHOLD);
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hspi->hdmarx->XferHalfCpltCallback = SPI_DMAHalfTransmitReceiveCplt;
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hspi->hdmarx->XferCpltCallback = SPI_DMATransmitReceiveCplt;
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hspi->hdmarx->XferErrorCallback = NULL;
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hspi->hdmarx->XferAbortCallback = NULL;
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hspi->hdmatx->XferHalfCpltCallback = NULL;
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hspi->hdmatx->XferCpltCallback = NULL;
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hspi->hdmatx->XferErrorCallback = NULL;
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hspi->hdmatx->XferAbortCallback = NULL;
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/* Enable the Rx DMA Stream/Channel */
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errorcode = HAL_DMA_Start_IT(hspi->hdmarx, (uint32_t)&hspi->Instance->DR,
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(uint32_t)hspi->pRxBuffPtr, hspi->RxXferCount);
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if (HAL_OK != errorcode) {
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/* Update SPI error code */
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SET_BIT(hspi->ErrorCode, HAL_SPI_ERROR_DMA);
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goto error;
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}
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/* Enable Rx DMA Request */
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SET_BIT(hspi->Instance->CR2, SPI_CR2_RXDMAEN);
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/* Enable the Tx DMA Stream/Channel */
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errorcode = HAL_DMA_Start_IT(hspi->hdmatx, (uint32_t)hspi->pTxBuffPtr,
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(uint32_t)&hspi->Instance->DR, hspi->TxXferCount);
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if (HAL_OK != errorcode) {
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/* Update SPI error code */
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SET_BIT(hspi->ErrorCode, HAL_SPI_ERROR_DMA);
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goto error;
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}
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/* Check if the SPI is already enabled */
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if ((hspi->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE) {
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__HAL_SPI_ENABLE(hspi);
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}
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/* Enable the SPI Error Interrupt Bit */
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__HAL_SPI_ENABLE_IT(hspi, (SPI_IT_ERR));
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/* Enable Tx DMA Request */
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SET_BIT(hspi->Instance->CR2, SPI_CR2_TXDMAEN);
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error :
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__HAL_UNLOCK(hspi);
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return errorcode;
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}
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void SPI_DMATransmitReceiveCplt(DMA_HandleTypeDef *hdma)
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{
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SPI_HandleTypeDef *hspi = (SPI_HandleTypeDef *)hdma->Parent;
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(void)hspi;
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}
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static float process(float in_div4)
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{
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static float z1 = 0, z2 = 0, z3 = 0, z5 = 0;
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float out1 = qfp_fadd(in_div4, z1);
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z1 = qfp_fadd(qfp_fmul(1.062f, out1), z2);
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z2 = qfp_fsub(qfp_fmul(-0.14f, out1), in_div4);
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float out2 = qfp_fadd(out1, z3);
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z3 = out1;
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float out3 = qfp_fadd(out2, z5);
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z5 = qfp_fsub(qfp_fmul(0.985f, out3), out2);
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return out3;
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}
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void SPI_DMAHalfTransmitReceiveCplt(DMA_HandleTypeDef *hdma)
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{
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HAL_GPIO_WritePin(IDLE_GPIO_Port, IDLE_Pin, GPIO_PIN_RESET);
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SPI_HandleTypeDef *hspi = (SPI_HandleTypeDef *)hdma->Parent;
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(void)hspi;
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sample_t *sample = (sample_t *)I2S_Receive_Buffer;
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for (int i = 0; i < SAMPLE_COUNT / 8; i++) {
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float f = process(qfp_int2float(sample[i].value / 4));
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DB_Sum_Squares = qfp_fadd(DB_Sum_Squares, qfp_fmul(f, f));
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}
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DB_Count += SAMPLE_COUNT * 2; // Pretend we sampled the entire I2S buffer
|
|
|
|
if (DB_Count > SAMPLES_PER_REPORT) {
|
|
float rms = qfp_fsqrt(qfp_fdiv(DB_Sum_Squares, qfp_uint2float(DB_Count)));
|
|
float db = qfp_fadd(MIC_OFFSET_DB + MIC_REF_DB, qfp_fmul(20.f,
|
|
qfp_flog10(qfp_fdiv(rms, MIC_REF_AMPL))));
|
|
DB_Sum_Squares = 0.f;
|
|
DB_Count = 0;
|
|
|
|
printf("%d dB\r\n", qfp_float2int(db));
|
|
}
|
|
}
|
|
/* USER CODE END 4 */
|
|
|
|
/**
|
|
* @brief This function is executed in case of error occurrence.
|
|
* @retval None
|
|
*/
|
|
void Error_Handler(void)
|
|
{
|
|
/* USER CODE BEGIN Error_Handler_Debug */
|
|
__disable_irq();
|
|
printf("Unhandled error, halting!\r\n");
|
|
while (1)
|
|
{
|
|
}
|
|
/* USER CODE END Error_Handler_Debug */
|
|
}
|
|
|
|
#ifdef USE_FULL_ASSERT
|
|
/**
|
|
* @brief Reports the name of the source file and the source line number
|
|
* where the assert_param error has occurred.
|
|
* @param file: pointer to the source file name
|
|
* @param line: assert_param error line source number
|
|
* @retval None
|
|
*/
|
|
void assert_failed(uint8_t *file, uint32_t line)
|
|
{
|
|
/* USER CODE BEGIN 6 */
|
|
printf("Wrong parameters value: file %s on line %d\r\n", file, line);
|
|
/* USER CODE END 6 */
|
|
}
|
|
#endif /* USE_FULL_ASSERT */
|