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/**
******************************************************************************
* @file Examples_LL/EXTI/EXTI_ToggleLedOnIT/Src/main.c
* @author MCD Application Team
* @brief This example describes how to configure the EXTI and use
* GPIOs using the STM32WBxx LL API to toggles the available
* users Leds on the board when User button is pressed.
* Peripheral initialization done using LL unitary services functions.
******************************************************************************
* @attention
*
* Copyright (c) 2019-2021 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32WBxx_LL_Examples
* @{
*/
/** @addtogroup EXTI_ToggleLedOnIT
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Configure_EXTI(void);
void LED_Init(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* Configure the system clock to 16 MHz */
SystemClock_Config();
/* Initialize LED2 */
LED_Init();
/* Configure the EXTI Line on User Button */
Configure_EXTI();
/* Infinite loop */
while (1)
{
}
}
/**
* @brief This function configures EXTI Line as Push-Button
* @note Peripheral configuration is minimal configuration from reset values.
* @param None
* @retval None
*/
void Configure_EXTI()
{
/* -1- GPIO Config */
/* Enable GPIO Clock (to be able to program the configuration registers) */
USER_BUTTON_GPIO_CLK_ENABLE();
/* Configure IO */
LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT);
LL_GPIO_SetPinPull(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_PULL_UP);
/* -2- Connect External Line to the GPIO*/
USER_BUTTON_SYSCFG_SET_EXTI();
/*-3- Enable a falling trigger EXTI line 13 Interrupt */
USER_BUTTON_EXTI_LINE_ENABLE();
USER_BUTTON_EXTI_FALLING_TRIG_ENABLE();
/*-4- Configure NVIC for EXTI4_IRQn */
NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn);
NVIC_SetPriority(USER_BUTTON_EXTI_IRQn,0);
}
/**
* @brief Initialize LED2.
* @param None
* @retval None
*/
void LED_Init(void)
{
/* Enable the LED2 Clock */
LED2_GPIO_CLK_ENABLE();
/* Configure IO in output push-pull mode to drive external LED2 */
LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
//LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
//LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
/* Reset value is LL_GPIO_PULL_NO */
//LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follows :
* System Clock source = PLL (HSI)
* SYSCLK(Hz) = 16000000
* HCLK(Hz) = 16000000
* HCLK1 Prescaler = 1
* HCKL2 Prescaler = 1
* HCKLS Prescaler = 1
* APB1 Prescaler = 1
* APB2 Prescaler = 1
* HSI Frequency(Hz) = 16000000
* Flash Latency(WS) = 0
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
/* HSI configuration and activation */
LL_RCC_HSI_Enable();
while(LL_RCC_HSI_IsReady() != 1)
{
}
/* Sysclk activation on the HSI */
/* Set CPU1 prescaler*/
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
/* Set CPU2 prescaler*/
LL_C2_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
{
}
/* Set AHB SHARED prescaler*/
LL_RCC_SetAHB4Prescaler(LL_RCC_SYSCLK_DIV_1);
/* Set APB1 prescaler*/
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
/* Set APB2 prescaler*/
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
/* Disable MSI */
LL_RCC_MSI_Disable();
while(LL_RCC_MSI_IsReady() != 0)
{
}
/* Set systick to 1ms in using frequency set to 16MHz */
LL_Init1msTick(16000000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(16000000);
}
/******************************************************************************/
/* USER IRQ HANDLER TREATMENT */
/******************************************************************************/
/**
* @brief Function to manage IRQ Handler
* @param None
* @retval None
*/
void UserButton_Callback(void)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(char *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
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