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Zephyr project on STM32

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Timer Interrupt Not Working

Posted by abdullahbaig on 2018-04-03 19:08

I am using STM32F103C8 with STM32CubeMX and SW4STM32. The CPU is running at 64 MHz and I have verified it with PWM frequency.

I am trying to generate an update interrupt from timer 4 so I generated a CubeMX project and copied all its files into a SW4STM32 project.

The code hangs (or sticks in a never ending loop) when the function HAL_TIM_Base_Start_IT(&htim4) is called. If I change that function to HAL_TIM_Base_Start(&htim4) then the rest of the code runs but obviously the interrupts aren’t generated.

What I think, either some assert is failing or there is some problem in interrupt handling.

Can anyone point out what I am doing wrong?

​x
 
#include "stm32f1xx_hal.h"
​
TIM_HandleTypeDef htim2;
TIM_HandleTypeDef htim4;
​
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM2_Init(void);
static void MX_TIM4_Init(void);
​
​
int main(void)
{
​
  HAL_Init();
​
  /* Configure the system clock */
  SystemClock_Config();
​
  HAL_MspInit();
​
​
​
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_TIM4_Init();
​
​
  /* USER CODE BEGIN 2 */
​
  HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);
  HAL_TIM_Base_Start_IT(&htim4);
​
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); // controller doesn't reach here
​
  while (1)
  {
  /* USER CODE END WHILE */
      HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
//    HAL_Delay(1950);
      HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
      HAL_Delay(150);
      HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
      HAL_Delay(100);
      HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
      HAL_Delay(150);
​
  /* USER CODE BEGIN 3 */
​
  }
  /* USER CODE END 3 */
​
}
​
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
​
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;
​
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);
​
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);
​
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV8;
  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
​
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
​
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
​
  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
​
​
​
/* TIM2 init function */
void MX_TIM2_Init(void)
{
​
  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
  TIM_OC_InitTypeDef sConfigOC;
​
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 1;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 1024;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim2);
​
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig);
​
  HAL_TIM_PWM_Init(&htim2);
​
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig);
​
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 128;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2);
​
}
​
/* TIM4 init function */
void MX_TIM4_Init(void)
{
​
  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
​
  htim4.Instance = TIM4;
  htim4.Init.Prescaler = 8000;
  htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim4.Init.Period = 8000;
  htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim4);
​
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig);
​
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig);
​
}
​
/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
void MX_GPIO_Init(void)
{
​
  GPIO_InitTypeDef GPIO_InitStruct;
​
  /* GPIO Ports Clock Enable */
  __GPIOC_CLK_ENABLE();
  __GPIOA_CLK_ENABLE();
​
  /*Configure GPIO pin : PC13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
​
  /*Configure GPIO pin : PCA13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
​
}
​
​
​
​
​
void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{
​
  GPIO_InitTypeDef GPIO_InitStruct;
  if(htim_base->Instance==TIM2)
  {
  /* USER CODE BEGIN TIM2_MspInit 0 */
​
  /* USER CODE END TIM2_MspInit 0 */
    /* Peripheral clock enable */
    __TIM2_CLK_ENABLE();
  
    /**TIM2 GPIO Configuration    
    PA1     ------> TIM2_CH2 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
​
  /* USER CODE BEGIN TIM2_MspInit 1 */
​
  /* USER CODE END TIM2_MspInit 1 */
  }
  else if(htim_base->Instance==TIM4)
  {
  /* USER CODE BEGIN TIM4_MspInit 0 */
​
  /* USER CODE END TIM4_MspInit 0 */
    /* Peripheral clock enable */
    __TIM4_CLK_ENABLE();
  /* Peripheral interrupt init*/
    HAL_NVIC_SetPriority(TIM4_IRQn, 0, 1);
    HAL_NVIC_EnableIRQ(TIM4_IRQn);
  /* USER CODE BEGIN TIM4_MspInit 1 */
​
  /* USER CODE END TIM4_MspInit 1 */
  }
​
}
​
​
​
​
​
​
void TIM4_IRQHandler(void)
{
  /* USER CODE BEGIN TIM4_IRQn 0 */
​
  /* USER CODE END TIM4_IRQn 0 */
  HAL_TIM_IRQHandler(&htim4);
  /* USER CODE BEGIN TIM4_IRQn 1 */
​
  HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
​
  /* USER CODE END TIM4_IRQn 1 */
}
Reads: 18662
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Posted by RandallStockberger on 2018-04-05 02:04

Did you compile this a C or C++. If you used c++ you need to put an ‘extern “C”’ wrapper around the ISR.

Randy

Link
Posted by abdullahbaig on 2018-04-05 05:57

Thanks very much @RandallStockberger. I have been pulling my hair over this for the last 4 days.

There is already an extern C around the void TIM4_IRQHandler(void) declaration in stm32f1xx_it.h

  1. ifdef __cplusplus

extern “C” {

  1. endif


/* Includes ----------------------*/
/* Exported types --------------------*/
/* Exported constants --------------------*/
/* Exported macro --------------------*/
/* Exported functions ------------------- */

void SysTick_Handler(void);
void TIM4_IRQHandler(void);
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);

  1. ifdef __cplusplus

}

  1. endif
Link

Posted by abdullahbaig on 2018-04-05 06:33

Someone on another forum has pointed out to check the startup_stm32.s . When I did, it had the following contents in in a particular table. Following lines and all zeros below. There is no mention of TIM4_IRQHandler . I think there is a problem here. Can anyone share some insight on where TIM4_IRQHandler should be located in this table and what might have caused it to miss out??


g_pfnVectors:
.word _estack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.word MemManage_Handler
.word BusFault_Handler
.word UsageFault_Handler
.word 0
.word 0
.word 0
.word 0
.word SVC_Handler
.word DebugMon_Handler
.word 0
.word PendSV_Handler
.word SysTick_Handler
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0

Link

Posted by abdullahbaig on 2018-04-05 06:53

When I created the project, SW4STM32 should have included the startup file for the controller I am using, i.e. STM32F103C8. However, it has included the generic STM32f startup file startup_stm32.s . When I searched for the startup file startup_stm32f103x8 in the Firmware folder, it had the startup for every other controller in the series, (stm32f103x6, xb, xc, xg) but not x8.

So what’s everyone’s verdict?? Am I doomed??

Link

Posted by abdullahbaig on 2018-04-05 10:42

IT’S WORKING!!


I just made a new project in the SW4STM32 and it includes the correct startup file with all the interrupt vectors. The firmware still doesn’t have startup_stm32f103x8.s file and the name of the file in startup folder is startup_stm32.s but now it has all the interrupt vectors and other definitions.

The problem has vanished now and the interrupt is working like a charm. rolleyes

But I am still skeptic of why the startup file was missed in the first try.

The startup_stm32.s file has the following comment in the beginning, so I am relieved.

/**
******************************************************************************
* @file startup_stm32.s dedicated to STM32F103C8Tx device
* @author Ac6
* @version V1.0.0
* @date 2018-04-05
******************************************************************************
*/

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