Learning how to use the STM32WB55RG alongside the 'Mastering STM32' by Carmine Noviello. I followed the instructions for setting up interrupts to use the NUCLEO hardware buttons, but when I build, I get a warning that 'HAL_GPIO_EXTI_Callback' defined but not used [-Wunused-function]. I have pasted some snippets of my code to help.
I have added toggling the state of an LED to the Handler functions to ensure they are being called. What seems to happen is that the __weak function is called, despite me placing a definition of the callback in main... any help is appreciated.
EDIT: I should also mention that the interrupts do not work, the callback is not called as per the warning
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, LD2_Pin|LD3_Pin|LD1_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : B1_Pin */
GPIO_InitStruct.Pin = B1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pins : LD2_Pin LD3_Pin LD1_Pin */
GPIO_InitStruct.Pin = LD2_Pin|LD3_Pin|LD1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pins : B2_Pin B3_Pin */
GPIO_InitStruct.Pin = B2_Pin|B3_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI0_IRQn);
HAL_NVIC_SetPriority(EXTI1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI1_IRQn);
}
//===============================================================
// from main
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_USB_PCD_Init();
/* USER CODE BEGIN 2 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == B2_Pin)
{
HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
}
else if (GPIO_Pin == B3_Pin)
{
HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
}
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
uint16_t speed = 100;
uint16_t counter = 0;
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
if (counter % speed == 0)
{
HAL_GPIO_TogglePin(LD1_GPIO_Port, LD1_Pin);
}
if (counter % (uint16_t)(speed * 2.5) == 0)
{
//HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
}
if (counter % (uint16_t)(speed * 10) == 0)
{
//HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
counter = 0;
}
HAL_Delay(1);
counter++;
}
//===========================================================
void EXTI0_IRQHandler(void)
{
/* USER CODE BEGIN EXTI0_IRQn 0 */
//HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
/* USER CODE END EXTI0_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(B2_Pin);
/* USER CODE BEGIN EXTI0_IRQn 1 */
/* USER CODE END EXTI0_IRQn 1 */
}
/**
* @brief This function handles EXTI line1 interrupt.
*/
void EXTI1_IRQHandler(void)
{
/* USER CODE BEGIN EXTI1_IRQn 0 */
//HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
/* USER CODE END EXTI1_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(B3_Pin);
/* USER CODE BEGIN EXTI1_IRQn 1 */
/* USER CODE END EXTI1_IRQn 1 */
}
