No capture IT triggered

[Gaetan]

Hi,

Something seems to be wrong with STMCubeIDE Version: 1.16.0 Build: 21983_20240628_1741 (UTC) with an STM32G070RBT6. After generation of the code, the Timer code is like this:

1. /**
2. * @brief TIM3 Initialization Function
3. * @param None
4. * @retval None
5. */
6. static void MX_TIM3_Init(void)
7. {
8.  
9. /* USER CODE BEGIN TIM3_Init 0 */
10. // HAL_TIM_IC_DeInit(&htim3); // GDE
11.  
12. /* USER CODE END TIM3_Init 0 */
13.  
14. TIM_ClockConfigTypeDef sClockSourceConfig = {0};
15. TIM_MasterConfigTypeDef sMasterConfig = {0};
16. TIM_IC_InitTypeDef sConfigIC = {0};
17.  
18. /* USER CODE BEGIN TIM3_Init 1 */
19.  
20. /* USER CODE END TIM3_Init 1 */
21. htim3.Instance = TIM3;
22. htim3.Init.Prescaler = 1;
23. htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
24. htim3.Init.Period = 65535;
25. htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
26. htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
27. if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
28. {
29. Error_Handler();
30. }
31. sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
32. if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
33. {
34. Error_Handler();
35. }
36. if (HAL_TIM_IC_Init(&htim3) != HAL_OK)
37. {
38. Error_Handler();
39. }
40. sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
41. sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
42. if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
43. {
44. Error_Handler();
45. }
46. sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
47. sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
48. sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
49. sConfigIC.ICFilter = 0;
50. if (HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_1) != HAL_OK)
51. {
52. Error_Handler();
53. }
54. /* USER CODE BEGIN TIM3_Init 2 */
55. /* USER CODE END TIM3_Init 2 */
56. }

When we call HAL_TIM_IC_Init() function, the htim->State is already set to HAL_TIM_STATE_READY instead of HAL_TIM_STATE_RESET, so HAL_TIM_IC_MspInit(htim) is never called.

So the interrupt is not triggered, HAL_TIM_IC_CaptureCallback() is never called too.

Is my analysis right?

[TDK]

htim3 is zero-initialized at the start, which sets its state to HAL_TIM_STATE_RESET. Must be something else going on here. Perhaps show your full main.c code. You could set a watchpoint on htim->State to see where it's being modified.

Edit: Oh, I see it gets set to READY in HAL_TIM_Base_Init. Yeah, you may be right. Sorry for noise.

[Gaetan · Accepted solution]

I've solved the problem.

The MX_NVIC_Init() function called in main does the same thing as the HAL_TIM_IC_MspInit() function, but without testing htim->State.

With the correct NVIC initialization:

/* TIM3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM3_IRQn);

Now it's OK.
Thanks for your help.