mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-29 08:52:04 -07:00
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/**
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* Power Voltage Detector(PVD) Demo
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*
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* - when input(PB7) voltage lower than 1.2V, PB5 output high
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*/
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#include "main.h"
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#include "py32f0xx_bsp_clock.h"
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#include "py32f0xx_bsp_printf.h"
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static void APP_GPIO_Config(void);
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static void APP_ExtiConfig(void);
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static void APP_PVD_Config(void);
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int main(void)
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{
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// Set HSI 24MHz as system clock source
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BSP_RCC_HSI_24MConfig();
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// Initialize UART on PA2:TX PA3:RX
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BSP_USART_Config(115200);
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printf("PY32F0 PVD Demo\r\nClock: %ld\r\n", SystemCoreClock);
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// Set PB5 for LED output
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APP_GPIO_Config();
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// Set PB7 as analog input
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APP_ExtiConfig();
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APP_PVD_Config();
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// Enable PVD
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LL_PWR_EnablePVD();
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while (1);
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}
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static void APP_GPIO_Config(void)
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{
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
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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_ExtiConfig(void)
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{
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LL_GPIO_InitTypeDef GPIO_InitStruct;
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LL_EXTI_InitTypeDef EXTI_InitStruct;
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
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// PB7
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GPIO_InitStruct.Pin = LL_GPIO_PIN_7;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
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LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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// Line 16 is for PVD output
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EXTI_InitStruct.Line = LL_EXTI_LINE_16;
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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_RISING_FALLING;
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LL_EXTI_Init(&EXTI_InitStruct);
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}
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static void APP_PVD_Config(void)
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{
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
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LL_PWR_SetPVDLevel(LL_PWR_PVDLEVEL_0);
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LL_PWR_DisablePVDFilter();
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LL_PWR_SetPVDFilter(LL_PWR_PVD_FILTER_1CLOCK);
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// PB7
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LL_PWR_SetPVDSource(LL_PWR_PVD_SOURCE_PB7);
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NVIC_SetPriority(PVD_IRQn, 1);
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NVIC_EnableIRQ(PVD_IRQn);
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}
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void PVD_IRQHandler(void)
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{
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if (LL_PWR_IsActiveFlag_PVDO())
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{
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LL_GPIO_SetOutputPin(GPIOB, LL_GPIO_PIN_5);
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}
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else
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{
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LL_GPIO_ResetOutputPin(GPIOB, LL_GPIO_PIN_5);
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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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