How do you install PDM library ?

[EEnco.1]

I struggle to use PDM Filter library.

This is the message error I get :

What I have done so far are : - in project properties, C/C++ general, Paths and syombols, in "Includes" I added the path to pdm2pcm_glo.h ; in "Library Paths" I added the path to a folder with all the libPDM_FIlter_CM3_GCC_wc16.A ... files.- Wrote #include "pdm2pcm_glo.h" in the main.

It's still not working :\

In "Paths and Symbols", in libraries, I think I can add a library but I don't know which one to use (all the files were included in mems1 folder). I tried randomly picking but I had another error message;

I am new to cubeIDE so it's very possible Im doing a beginner mistake here

[Imen.D]

Hello @EEnco.1​ ,

Could you please confirm which library and IDE tool versions are used?

Please make sure to use the latest release of CubeMX/CubeIDE and keep me informed if you have the same issue.

Imen

[EEnco.1]

I'm using STM32CubeIde 1.8.0 and for the library I took one from memsmic1_v5.6.0.

Maybe I'm doing something wrong with the library because when I do this :

 

I get this message error :

c:\st\stm32cubeide_1.8.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: cannot find -lC:/Users/username/STM32CubeIDE/workspace_1.8.0/MEMS/PDM/Lib/libPDMFilter_CM4_Keil_wc16.lib

[EEnco.1]

Update : I have managed to solve the issue, It was a problem with how I configured C/C++ Build settings

[mattias norlander]

The error message suggests that there is no problem with include of header files. Pre-processing seem to work. The error is finding the PDM_Filter_Init function in the linked arhive file.

Did you have a look at the CubeIDE User Guide and specifically the chapter 2.5.8 Include libraries?

It shows quite hands-on how to add a library. I think you could validate this first.

Which library is the right one? Not sure... There seem to be dedicated archives for GCC, choose the one matching your fpu setting.

[EEnco.1]

Thanks for you answer. I managed to fix the issue, it was a mistake with how I confugired the C/C++ Build settings. Thanks for taking your time to help me !

[khashayar]

Hi
where can i download "pdm2pcm_glo.h" library?

 

[ghrairim]

Hello @khashayar , 

The "pdm2pcm_glo.h" file is part of PDM2PCM library. You have to download the full zipped STM32CubeWB package from ST.com and then extract the content of the library Middlewares/ST/STM32_Audio.

With regards,

[FShah.1]

Hi, I am trying to use the pdm2pcm code to get the audio from MEMS I2S interface mics SPH0645LM4H.

I am getting this error during build. 

Description Resource Path Location Type
C:/Users/mylaptop/STM32CubeIDE/workspace_1.14.0/audio_mic_I2S/Debug/../Middlewares/ST/STM32_Audio/Addons/PDM/Inc/pdm2pcm_glo.c:31: undefined reference to `PDM_Filter_setConfig' audio_mic_I2S C/C++ Problem

/* USER CODE BEGIN Header */

/**

  ******************************************************************************

  * @file           : main.c

  * @brief          : Main program body

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2024 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

  ******************************************************************************

  */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"

 

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include "stdio.h"

#include "pdm2pcm_glo.h"

 

/* USER CODE END Includes */

 

/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */

 

/* USER CODE END PTD */

 

/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

 

/* USER CODE END PD */

 

/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */

 

/* USER CODE END PM */

 

/* Private variables ---------------------------------------------------------*/

I2S_HandleTypeDef hi2s1;

DMA_HandleTypeDef hdma_spi1_rx;

 

/* USER CODE BEGIN PV */

int16_t data_i2s[100];

volatile int16_t sample_i2s;

/* USER CODE END PV */

 

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_DMA_Init(void);

static void MX_I2S1_Init(void);

/* USER CODE BEGIN PFP */

static void MX_PDM2PCM_Init(void);

/* USER CODE END PFP */

 

/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

 

/* USER CODE END 0 */

 

/**

  * @brief  The application entry point.

  * @retval int

  */

int main(void)

{

  /* USER CODE BEGIN 1 */

 

  /* USER CODE END 1 */

 

  /* MCU Configuration--------------------------------------------------------*/

 

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();

 

  /* USER CODE BEGIN Init */

 

  /* USER CODE END Init */

 

  /* Configure the system clock */

  SystemClock_Config();

 

  /* USER CODE BEGIN SysInit */

 

  /* USER CODE END SysInit */

 

  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_DMA_Init();

  MX_I2S1_Init();

  MX_PDM2PCM_Init();

  /* USER CODE BEGIN 2 */

HAL_I2S_Receive_DMA(&hi2s1, (uint16_t *)data_i2s , sizeof(data_i2s)/2);

  /* USER CODE END 2 */

 

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */

 

    /* USER CODE BEGIN 3 */

//   printf("Hello World!\r\n");

  HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_3);

  HAL_Delay(1000);

  }

  /* USER CODE END 3 */

}

 

/**

  * @brief System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

 

  /** Configure the main internal regulator output voltage

  */

  __HAL_RCC_PWR_CLK_ENABLE();

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);

 

  /** Initializes the RCC Oscillators according to the specified parameters

  * in the RCC_OscInitTypeDef structure.

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

  RCC_OscInitStruct.PLL.PLLM = 8;

  RCC_OscInitStruct.PLL.PLLN = 100;

  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

  RCC_OscInitStruct.PLL.PLLQ = 2;

  RCC_OscInitStruct.PLL.PLLR = 2;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

 

  /** Initializes the CPU, AHB and APB buses clocks

  */

  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_3) != HAL_OK)

  {

    Error_Handler();

  }

}

 

/**

  * @brief I2S1 Initialization Function

  * @PAram None

  * @retval None

  */

static void MX_I2S1_Init(void)

{

 

  /* USER CODE BEGIN I2S1_Init 0 */

 

  /* USER CODE END I2S1_Init 0 */

 

  /* USER CODE BEGIN I2S1_Init 1 */

 

  /* USER CODE END I2S1_Init 1 */

  hi2s1.Instance = SPI1;

  hi2s1.Init.Mode = I2S_MODE_MASTER_RX;

  hi2s1.Init.Standard = I2S_STANDARD_PHILIPS;

  hi2s1.Init.DataFormat = I2S_DATAFORMAT_16B_EXTENDED;

  hi2s1.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;

  hi2s1.Init.AudioFreq = I2S_AUDIOFREQ_32K;

  hi2s1.Init.CPOL = I2S_CPOL_LOW;

  hi2s1.Init.ClockSource = I2S_CLOCK_PLL;

  hi2s1.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_DISABLE;

  if (HAL_I2S_Init(&hi2s1) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN I2S1_Init 2 */

 

  /* USER CODE END I2S1_Init 2 */

 

}

 

/**

  * Enable DMA controller clock

  */

static void MX_DMA_Init(void)

{

 

  /* DMA controller clock enable */

  __HAL_RCC_DMA2_CLK_ENABLE();

 

  /* DMA interrupt init */

  /* DMA2_Stream0_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);

  HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);

 

}

 

/**

  * @brief GPIO Initialization Function

  * @PAram None

  * @retval None

  */

static void MX_GPIO_Init(void)

{

  GPIO_InitTypeDef GPIO_InitStruct = {0};

/* USER CODE BEGIN MX_GPIO_Init_1 */

/* USER CODE END MX_GPIO_Init_1 */

 

  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();

 

  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_RESET);

 

  /*Configure GPIO pin : PA3 */

  GPIO_InitStruct.Pin = GPIO_PIN_3;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 

/* USER CODE BEGIN MX_GPIO_Init_2 */

/* USER CODE END MX_GPIO_Init_2 */

}

 

/* USER CODE BEGIN 4 */

PDM_Filter_Handler_t PDM_Filter_Handler[4];

PDM_Filter_Config_t PDM_Filter_Config[4];

 

static void MX_PDM2PCM_Init(void)

{

/*Enables and resets CRC-32 from STM32 HW */

__HAL_RCC_CRC_CLK_ENABLE();

CRC->CR = CRC_CR_RESET;

 

for (uint8_t index = 0; index < 4; index++)

{

PDM_Filter_Handler[index].bit_order = PDM_FILTER_BIT_ORDER_LSB;

PDM_Filter_Handler[index].endianness = PDM_FILTER_ENDIANNESS_BE;

PDM_Filter_Handler[index].high_pass_tap = 2122358088;

PDM_Filter_Handler[index].out_ptr_channels = 1;

PDM_Filter_Handler[index].in_ptr_channels = 1;

PDM_Filter_Init((PDM_Filter_Handler_t *)(&PDM_Filter_Handler[index]));

 

PDM_Filter_Config[index].output_samples_number = 16;

PDM_Filter_Config[index].mic_gain = 24;

PDM_Filter_Config[index].decimation_factor = PDM_FILTER_DEC_FACTOR_64;

PDM_Filter_setConfig((PDM_Filter_Handler_t *)&PDM_Filter_Handler[index], &PDM_Filter_Config[index]);

}

}

 

 

 

 

void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s)

{

sample_i2s = data_i2s[0];

}

 

/* 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 */

  /* User can add his own implementation to report the HAL error return state */

  __disable_irq();

  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 */

  /* User can add his own implementation to report the file name and line number,

     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */

 

 

 

[ghrairim]

Hello @FShah.1 

I suggest you in: C/C++ General/ Include paths and Symbols to Edit the format :  Middlewares/ST/STM32_Audio/Addons/PDM/Inc and Middlewares/ST/STM32_Audio/Addons/PDM 

And in C/C++ Build / Settings / MCU GCC Compiler / Include Paths :    ../Middlewares/ST/STM32_Audio/Addons/PDM/Inc  and  ../Middlewares/ST/STM32_Audio/Addons/PDM

 

[FShah.1]

Thanks @ghrairim the problem has solved.