mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-31 09:52:05 -07:00
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/***
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* Demo: EXTI Interrupt
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*/
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#include "main.h"
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#include "py32f0xx_bsp_led.h"
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#include "py32f0xx_bsp_printf.h"
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static void APP_SystemClockConfig(void);
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static void APP_GpioConfig(void);
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static void APP_ConfigureEXTI(void);
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int main(void)
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{
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APP_SystemClockConfig();
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APP_GpioConfig();
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APP_ConfigureEXTI();
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while (1);
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}
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static void APP_SystemClockConfig(void)
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{
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LL_RCC_HSI_Enable();
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while(LL_RCC_HSI_IsReady() != 1);
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_Init1msTick(8000000);
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LL_SetSystemCoreClock(8000000);
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}
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static void APP_GpioConfig(void)
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{
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/* Enable GPIOB Clock */
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
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/* PB5 as output */
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_OUTPUT);
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}
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static void APP_ConfigureEXTI(void)
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{
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/* Enable GPIOA Clock */
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
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/* PA12 as input */
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LL_GPIO_InitTypeDef GPIO_InitStruct;
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GPIO_InitStruct.Pin = LL_GPIO_PIN_12;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
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LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* Triggerred by falling edge */
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LL_EXTI_InitTypeDef EXTI_InitStruct;
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EXTI_InitStruct.Line = LL_EXTI_LINE_12;
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EXTI_InitStruct.LineCommand = ENABLE;
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EXTI_InitStruct.Mode = LL_EXTI_MODE_IT;
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EXTI_InitStruct.Trigger = LL_EXTI_TRIGGER_FALLING;
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LL_EXTI_Init(&EXTI_InitStruct);
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/**
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* Enable interrupt
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* - EXTI0_1_IRQn for PA/PB/PC[0,1]
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* - EXTI2_3_IRQn for PA/PB/PC[2,3]
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* - EXTI4_15_IRQn for PA/PB/PC[4,15]
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*/
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NVIC_SetPriority(EXTI4_15_IRQn, 0);
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NVIC_EnableIRQ(EXTI4_15_IRQn);
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}
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void EXTI4_15_IRQHandler(void)
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{
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if(LL_EXTI_IsActiveFlag(LL_EXTI_LINE_12))
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{
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LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_5);
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LL_EXTI_ClearFlag(LL_EXTI_LINE_12);
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}
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}
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void APP_ErrorHandler(void)
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{
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while (1);
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}
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#ifdef USE_FULL_ASSERT
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void assert_failed(uint8_t *file, uint32_t line)
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{
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while (1);
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}
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#endif /* USE_FULL_ASSERT */
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