GPIO , Button detection ( USER1) on STM32N6570-DK
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Hi ,
I’m currently playing around with the STM32N66570-DK kit.
I’m having a simple problem with button detection. For testing, I’m just using the USER1 button (BP1 in my code ) and LED1.
I couldn’t get the button working properly with interrupts, so in this code I just read the state of USER1 ( BP1) and turn LED1 on or off accordingly. The USER1 button is always read as the same value, no matter whether I press it or not.
in debug Mode :
GPIOx const GPIO_TypeDef * 0x56020800
GPIO_Pin uint16_t 8192
bitstatus GPIO_PinState GPIO_PIN_RESET
Here are the code and screenshots. The code was generated with CubeMX.
Thanks for your help!
Once I get the button detection working, I’ll move on to using interrupts.
Emmanuel
main.h :
#define BP1_Pin GPIO_PIN_13
#define BP1_GPIO_Port GPIOC
#define LED1_Pin GPIO_PIN_1
#define LED1_GPIO_Port GPIOO
main.c :
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
// code to test the LED1
//HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_SET);
//HAL_Delay(500);
//HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin);
// Read the button USER1
if(HAL_GPIO_ReadPin (BP1_GPIO_Port, BP1_Pin) == GPIO_PIN_RESET)
{
//Turn LED ON
HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_SET);
}
else
{
//Turn LED OFF
HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);
}
}
/* USER CODE END 3 */
}
-----------------------------------------------------------
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_GPIOO_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : BP1_Pin */
GPIO_InitStruct.Pin = BP1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(BP1_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LED1_Pin */
GPIO_InitStruct.Pin = LED1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}