STM32WB55 - LPTIM1 in interrupt mode

[jmchiappa]

Hello,

I'm struggling in working the LPTIM1 with ARR interrupt on my NUCLEO WB55.
The code is very simple and mostly extracted from CubeMX :

#include "Arduino.h" #include "stm32wbxx_hal_lptim.h" #include "stm32wbxx_ll_lptim.h" #define RED_LED PB1 #define GREEN_LED PB0 #define BLUE_LED PB5 // #define DEBUG #if defined(DEBUG) # define DBG_PRINTLN(a) {Serial.println(a);} #else # define DBG_PRINTLN(a) 0 #endif #define PERIOD 100000 // us #define LPTIM_INSTANCE LPTIM1 // (LPTIM_TypeDef *) LPTIM1_BASE LPTIM_HandleTypeDef hlptim1; volatile uint32_t counter = 0; volatile uint32_t counterIRQ = 0; void setup(void) { pinMode(BLUE_LED,OUTPUT); pinMode(GREEN_LED,OUTPUT); digitalWrite(BLUE_LED,HIGH); digitalWrite(GREEN_LED,HIGH); delay(100); digitalWrite(BLUE_LED,LOW); digitalWrite(GREEN_LED,LOW); DBG_PRINTLN("début setup"); hlptim1.Instance = LPTIM_INSTANCE; hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC; hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1; hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE; hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH; hlptim1.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE; hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL; hlptim1.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO; hlptim1.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO; Serial.println("init lp timer..."); if (HAL_LPTIM_Init(&hlptim1) != HAL_OK) { Error_Handler(); } DBG_PRINTLN("init timer OK.\nstart lp timer ..."); // Start timer in Time base mode. Required when there is no channel used but only update interrupt. HAL_LPTIM_Counter_Start_IT( &hlptim1,16384); DBG_PRINTLN("lp timer is running."); } void loop(void) {} void LPTIM1_IRQHandler(void) { digitalToggle(GREEN_LED); counterIRQ++; HAL_LPTIM_IRQHandler(&hlptim1); } extern "C" void HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef *hlptim) { digitalToggle(BLUE_LED); counter++; } extern "C" void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef *hlptim) { digitalToggle(BLUE_LED); counter++; } void HAL_LPTIM_MspInit(LPTIM_HandleTypeDef* hlptim) { DBG_PRINTLN("MSPInit in progress..."); RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; if(hlptim->Instance==LPTIM_INSTANCE) { PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LPTIM1; PeriphClkInitStruct.Lptim1ClockSelection = LL_RCC_LPTIM1_CLKSOURCE_PCLK1; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { Error_Handler(); } /* Peripheral clock enable */ __HAL_RCC_LPTIM1_CLK_ENABLE(); /* ## - 2 - Force & Release the LPTIM Periheral Clock Reset ############### */ /* Force the LPTIM Peripheral Clock Reset */ __HAL_RCC_LPTIM1_FORCE_RESET(); /* Release the LPTIM Peripheral Clock Reset */ __HAL_RCC_LPTIM1_RELEASE_RESET(); /* LPTIM1 interrupt Init */ HAL_NVIC_SetPriority(LPTIM1_IRQn, 0, 0); HAL_NVIC_EnableIRQ(LPTIM1_IRQn); DBG_PRINTLN("MSPInit OK."); } } 

The interrupt handler always falls in the defaultHandler which is an infinite loop.
Maybe something is missing...
Helps would be very appreciate.

framework : stm32duino 2.3.0 and tested with stm32duino 2.5.0 too
board : PNUCLEO WB55

Thanks
jm

[fpistm]

void LPTIM1_IRQHandler(void)

Add extern "C" before

[jmchiappa]

it works, thank you @fpistm