Use TIM1 output pwm with STM32WLE5CCU6

Hi all,

I'm trying to use TIM1 with CH1 and CH2 to output PWM signal on PA9 and PA8 with RAK3172-SIP. Here is what I've tried :

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file : main.c
 * @brief : Main program body
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2021 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"
#include "app_subghz_phy.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stm32wlxx_hal.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 ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void TIM1_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_SubGHz_Phy_Init();
 /* USER CODE BEGIN 2 */
 TIM1_Init();
 TIM1->CCER |= TIM_CCER_CC1E; // Enable output for Channel 1
 TIM1->CCER |= TIM_CCER_CC2E; // Enable output for Channel 2

 TIM1->BDTR |= TIM_BDTR_MOE; // Enable main output
 TIM1->CR1 |= TIM_CR1_CEN; // Start TIM1
 /* USER CODE END 2 */

 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */
 MX_SubGHz_Phy_Process();

 /* USER CODE BEGIN 3 */
 }
 /* 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 LSE Drive Capability
 */
 HAL_PWR_EnableBkUpAccess();
 __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

 /** Configure the main internal regulator output voltage
 */
 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

 /** Initializes the CPU, AHB and APB buses clocks
 */
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE|RCC_OSCILLATORTYPE_MSI;
 RCC_OscInitStruct.LSEState = RCC_LSE_ON;
 RCC_OscInitStruct.MSIState = RCC_MSI_ON;
 RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
 RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 {
 Error_Handler();
 }

 /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
 */
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
 |RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
 |RCC_CLOCKTYPE_PCLK2;
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;

 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
 {
 Error_Handler();
 }
}

/* USER CODE BEGIN 4 */
void TIM1_Init(void) {
 RCC->APB2ENR |= RCC_APB2ENR_TIM1EN; // Enable TIM1 clock

 TIM1->PSC = 47; // Prescaler value for 48 MHz clock 
 TIM1->ARR = 999; // Period value for 1 kHz PWM (999+1)

 TIM1->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; // PWM mode 1 for Channel 1
 TIM1->CCMR1 |= TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2; // PWM mode 1 for Channel 2
 TIM1->CCMR1 |= TIM_CCMR1_OC1PE | TIM_CCMR1_OC2PE; // Enable preload register for CCR1 and CCR2

 TIM1->CCR1 = 200; // Duty cycle value for Channel 1 (20%)
 TIM1->CCR2 = 100; // Duty cycle value for Channel 2 (10%)

 TIM1->CR1 |= TIM_CR1_ARPE; // Enable auto-reload preload
 TIM1->EGR |= TIM_EGR_UG; // Generate an update event to reload the prescaler value immediately
}

/* 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.
 * file: pointer to the source file name
 * 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) */
 while (1)
 {
 }
 /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

And in MX_GPIO_Init I've added :

 // Configure GPIO pins : PA8 PA9
 GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
 GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

But I've nothing on PA9 and PA8. Where is my issue? Bad clock configuration?