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ahmedfotoh
Explorer II
April 21, 2025
Solved

Cannot Update TIM1 CCR2 for Phase Shift PWM

  • April 21, 2025
  • 3 replies
  • 906 views

Dear STM community,

I use STM32 nucleo-f303ze with stm32cubeide , I try to achieve 4 PWM complementary signal  with controlled phase shift by potentiometer by using TIM1 channel 1 PWM Generation CH1 CH1N and TIM8 channel1 channel 1 PWM Generation CH1 CH1N 123.png

 

122.png

 

, I use TIM1 channel 2 output compare no output mode, I need to change TIM1 CCR2 in real time with pot.

but it take one value and no change with pot change.

can you help me to do that.

Best Regards,

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file : main.c
 * @brief : Main program body
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2025 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 "string.h"
#include <stdio.h>
#include <stdlib.h>
#include <MATH.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 ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;

TIM_HandleTypeDef htim1;
TIM_HandleTypeDef htim8;

/* USER CODE BEGIN PV */
uint32_t data = 0;
 uint32_t pwm = 0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM1_Init(void);
static void MX_TIM8_Init(void);
static void MX_ADC1_Init(void);
/* USER CODE BEGIN PFP */

/* 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_TIM1_Init();
 MX_TIM8_Init();
 MX_ADC1_Init();
 /* USER CODE BEGIN 2 */

 uint8_t button_val;
 HAL_TIM_Base_Start_IT(&htim1);
 HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
 HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
 HAL_TIM_OC_Start_IT(&htim1, TIM_CHANNEL_2);
 HAL_TIM_PWM_Start(&htim8, TIM_CHANNEL_1);
 HAL_TIMEx_PWMN_Start(&htim8, TIM_CHANNEL_1);

 TIM1 -> ARR = 1440;
 TIM1-> CCR1 =720;
 TIM8 -> ARR = 1440;
 TIM8-> CCR1 =720;
 /* USER CODE END 2 */

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

 /* USER CODE BEGIN 3 */
 HAL_ADC_Start(&hadc1);
 	 HAL_ADC_PollForConversion(&hadc1,1000);
 	 data = HAL_ADC_GetValue(&hadc1);
 	 pwm = MAP(data, 0, 4095, 0, 1440);

 	 TIM1 -> CCR2 = pwm;
 	 HAL_ADC_Stop(&hadc1);
 	 HAL_Delay(200);

 }
 /* USER CODE END 3 */
}

/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void)
{
 RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

 /** 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.PLLMUL = RCC_PLL_MUL9;
 RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
 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_DIV2;
 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
 {
 Error_Handler();
 }
 PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_TIM1|RCC_PERIPHCLK_TIM8
 |RCC_PERIPHCLK_ADC12;
 PeriphClkInit.Adc12ClockSelection = RCC_ADC12PLLCLK_DIV1;
 PeriphClkInit.Tim1ClockSelection = RCC_TIM1CLK_HCLK;
 PeriphClkInit.Tim8ClockSelection = RCC_TIM8CLK_HCLK;
 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
 {
 Error_Handler();
 }
}

/**
 * @brief ADC1 Initialization Function
 * @PAram None
 * @retval None
 */
static void MX_ADC1_Init(void)
{

 /* USER CODE BEGIN ADC1_Init 0 */

 /* USER CODE END ADC1_Init 0 */

 ADC_MultiModeTypeDef multimode = {0};
 ADC_ChannelConfTypeDef sConfig = {0};

 /* USER CODE BEGIN ADC1_Init 1 */

 /* USER CODE END ADC1_Init 1 */

 /** Common config
 */
 hadc1.Instance = ADC1;
 hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
 hadc1.Init.Resolution = ADC_RESOLUTION_12B;
 hadc1.Init.ScanConvMode = ADC_SCAN_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;
 hadc1.Init.LowPowerAutoWait = DISABLE;
 hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
 if (HAL_ADC_Init(&hadc1) != HAL_OK)
 {
 Error_Handler();
 }

 /** Configure the ADC multi-mode
 */
 multimode.Mode = ADC_MODE_INDEPENDENT;
 if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
 {
 Error_Handler();
 }

 /** Configure Regular Channel
 */
 sConfig.Channel = ADC_CHANNEL_1;
 sConfig.Rank = ADC_REGULAR_RANK_1;
 sConfig.SingleDiff = ADC_SINGLE_ENDED;
 sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
 sConfig.OffsetNumber = ADC_OFFSET_NONE;
 sConfig.Offset = 0;
 if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN ADC1_Init 2 */

 /* USER CODE END ADC1_Init 2 */

}

/**
 * @brief TIM1 Initialization Function
 * @PAram None
 * @retval None
 */
static void MX_TIM1_Init(void)
{

 /* USER CODE BEGIN TIM1_Init 0 */

 /* USER CODE END TIM1_Init 0 */

 TIM_MasterConfigTypeDef sMasterConfig = {0};
 TIM_OC_InitTypeDef sConfigOC = {0};
 TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

 /* USER CODE BEGIN TIM1_Init 1 */

 /* USER CODE END TIM1_Init 1 */
 htim1.Instance = TIM1;
 htim1.Init.Prescaler = 1-1;
 htim1.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
 htim1.Init.Period = 1440;
 htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 htim1.Init.RepetitionCounter = 0;
 htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
 if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
 {
 Error_Handler();
 }
 if (HAL_TIM_OC_Init(&htim1) != HAL_OK)
 {
 Error_Handler();
 }
 sMasterConfig.MasterOutputTrigger = TIM_TRGO_OC2REF;
 sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
 if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
 {
 Error_Handler();
 }
 sConfigOC.OCMode = TIM_OCMODE_PWM1;
 sConfigOC.Pulse = 0;
 sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
 sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
 sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
 sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
 sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
 if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
 {
 Error_Handler();
 }
 sConfigOC.OCMode = TIM_OCMODE_ACTIVE;
 if (HAL_TIM_OC_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
 {
 Error_Handler();
 }
 __HAL_TIM_ENABLE_OCxPRELOAD(&htim1, TIM_CHANNEL_2);
 sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
 sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
 sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
 sBreakDeadTimeConfig.DeadTime = 150;
 sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
 sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
 sBreakDeadTimeConfig.BreakFilter = 0;
 sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
 sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
 sBreakDeadTimeConfig.Break2Filter = 0;
 sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
 if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN TIM1_Init 2 */

 /* USER CODE END TIM1_Init 2 */
 HAL_TIM_MspPostInit(&htim1);

}

/**
 * @brief TIM8 Initialization Function
 * @PAram None
 * @retval None
 */
static void MX_TIM8_Init(void)
{

 /* USER CODE BEGIN TIM8_Init 0 */

 /* USER CODE END TIM8_Init 0 */

 TIM_SlaveConfigTypeDef sSlaveConfig = {0};
 TIM_MasterConfigTypeDef sMasterConfig = {0};
 TIM_OC_InitTypeDef sConfigOC = {0};
 TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

 /* USER CODE BEGIN TIM8_Init 1 */

 /* USER CODE END TIM8_Init 1 */
 htim8.Instance = TIM8;
 htim8.Init.Prescaler = 1-1;
 htim8.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
 htim8.Init.Period = 1440;
 htim8.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 htim8.Init.RepetitionCounter = 0;
 htim8.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
 if (HAL_TIM_Base_Init(&htim8) != HAL_OK)
 {
 Error_Handler();
 }
 if (HAL_TIM_PWM_Init(&htim8) != HAL_OK)
 {
 Error_Handler();
 }
 sSlaveConfig.SlaveMode = TIM_SLAVEMODE_TRIGGER;
 sSlaveConfig.InputTrigger = TIM_TS_ITR0;
 if (HAL_TIM_SlaveConfigSynchro(&htim8, &sSlaveConfig) != HAL_OK)
 {
 Error_Handler();
 }
 sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
 sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
 if (HAL_TIMEx_MasterConfigSynchronization(&htim8, &sMasterConfig) != HAL_OK)
 {
 Error_Handler();
 }
 sConfigOC.OCMode = TIM_OCMODE_PWM1;
 sConfigOC.Pulse = 0;
 sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
 sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
 sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
 sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
 sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
 if (HAL_TIM_PWM_ConfigChannel(&htim8, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
 {
 Error_Handler();
 }
 sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
 sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
 sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
 sBreakDeadTimeConfig.DeadTime = 150;
 sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
 sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
 sBreakDeadTimeConfig.BreakFilter = 0;
 sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
 sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
 sBreakDeadTimeConfig.Break2Filter = 0;
 sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
 if (HAL_TIMEx_ConfigBreakDeadTime(&htim8, &sBreakDeadTimeConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN TIM8_Init 2 */

 /* USER CODE END TIM8_Init 2 */
 HAL_TIM_MspPostInit(&htim8);

}

/**
 * @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();
 __HAL_RCC_GPIOB_CLK_ENABLE();

 /*Configure GPIO pin Output Level */
 HAL_GPIO_WritePin(led_GPIO_Port, led_Pin, GPIO_PIN_RESET);

 /*Configure GPIO pin : b1_Pin */
 GPIO_InitStruct.Pin = b1_Pin;
 GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
 GPIO_InitStruct.Pull = GPIO_PULLUP;
 HAL_GPIO_Init(b1_GPIO_Port, &GPIO_InitStruct);

 /*Configure GPIO pin : led_Pin */
 GPIO_InitStruct.Pin = led_Pin;
 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 HAL_GPIO_Init(led_GPIO_Port, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* 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 */
    This topic has been closed for replies.
    Best answer by ahmedfotoh

    @TDK Many thanks for reply my question , Thanks to God Almighty and then thanks to your help, I reach the solution of problem by use advanced timer TIM1 and set the four TIM1 channels CH1,CH2,CH3,CH4 to be configured in asymmetric mode 1112.jpgto produce two pair of complementary phase shifted PWM controlled by potentiometer, and change the phase shift angle in real time between them by change the value of pot. Knop.

    The code:

    https://github.com/ahmedfotoh/STM32F303ZE-STM32CubeIde-Full-Bridge-Phase-Shift-Complementary-PWM-by-Potentiometer

    Screenshot_2025_04_30-1.png

    3 replies

    T
    TDK
    Super User
    April 21, 2025

    > I use TIM1 channel 2 output compare no output mode, I need to change TIM1 CCR2 in real time with pot. but it take one value and no change with pot change.

    Configure CH2 to output a PWM signal if you want it to be a PWM signal. You have it configured to be active on match, not PWM.

    A
    ahmedfotohAuthor
    Explorer II
    April 21, 2025

    Dear TDK,

    Many thanks for reply , But I don't understand, what should I configure CH2 ? I already get two complementary signal for TIM1CH1 and another two for TIM8 CH1, But the problem is I need to do like this video

    W
    waclawek.jan
    Super User
    April 22, 2025

    > it take one value and no change with pot change

    TIM1_CCR2 probably does change - and you would "see" that would you set up TIM1_CH2 as PWM - but you don't see its influence on the TIM8 waveform, as it does not influence it.

    You have TIM8 in slave-mode controller set to Trigger, that means, that when trigger arrives, TIM8 counter starts (TIM8_CR1.CEN is set in hardware). However, you've already set TIM8_CR1.CEN, and it remains set, so triggers are simply ignored.

    One way to proceed is to leave TIM8 slave-mode controller set to Trigger, and set it to One-Pulse mode (TIM8_CR1.OPM=1). That way, after each TIM8 cycle, TIM8_CR1.CEN is cleared in hardware, and the trigger then restarts it. This may cause discontinuities when the trigger's position changes.

    Other way is to leave TIM8 running freely, but set its slave-mode controller to Reset.

    JW

     

    A
    ahmedfotohAuthor
    Explorer II
    April 22, 2025

    Dear waclawek.jan,

    I am very grateful for your response to my question, I tried to working as you mentioned in post, 

    But the problem still exists as I cannot make the change of phase shift between two complementary pwm of TIM1 & TIM8 signal with potentiometer change.

    what is the variable when it changes in value in real time so the phase shift occurs to TIM8 with TIM1?

    The link of my code

    https://drive.google.com/drive/folders/10gNHE3e5lXYI8ntDIl04SGhL_9fjWCYE?usp=drive_link

    T
    TDK
    Super User
    April 22, 2025

    I suggested enabling CH2 because otherwise CCR2 has no effect on the output as you have it set up.

    Another option is asymmetric PWM mode. Probably will need to use upcounting timers for that.

    TDK_0-1745327486030.png

     

    A
    ahmedfotohAuthor
    Explorer II
    April 22, 2025

    Dear TDK,

    Many thanks for your replying to my question, I try to make asymmetric PWM mode for TIM1 & TIM8 but the problem still exists as I cannot make the change.

     

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