CH32V208WBU6/DRV/drv_key.c

/*
 * drv_key.c
 *
 *  Created on: Jun 11, 2023
 *      Author: gxms0
 */
#include "drv_key.h"

uint8_t keys[4] = {0x00};

void EXTI2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void EXTI3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void EXTI4_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void EXTI9_5_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));

/*********************************************************************
 * @fn      EXTI0_INT_INIT
 *
 * @brief   Initializes EXTI0 collection.
 *
 * @return  none
 */
void exti_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    EXTI_InitTypeDef EXTI_InitStructure = {0};
    NVIC_InitTypeDef NVIC_InitStructure = {0};

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOD, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOB, &GPIO_InitStructure);



    NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);



    EXTI_ClearITPendingBit(EXTI_Line2);
    EXTI_ClearITPendingBit(EXTI_Line3);
    EXTI_ClearITPendingBit(EXTI_Line4);
    EXTI_ClearITPendingBit(EXTI_Line5);



    /* GPIOD ----> EXTI_Line2 */
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource2);

    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitStructure.EXTI_Line = EXTI_Line2;
    EXTI_Init(&EXTI_InitStructure);


    /* GPIOB ----> EXTI_Line3,4,5 */
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource3);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource4);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource5);


    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitStructure.EXTI_Line = EXTI_Line3 | EXTI_Line4 | EXTI_Line5;
    EXTI_Init(&EXTI_InitStructure);





}


void EXTI2_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line2)!=RESET)
  {
      keys[0] = (keys[0] > 0)?(0x00):(0x01);
      EXTI_ClearITPendingBit(EXTI_Line2);     /* Clear Flag */
  }
}

void EXTI3_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line3)!=RESET)
  {
      keys[1] = (keys[1] > 0)?(0x00):(0x01);
      EXTI_ClearITPendingBit(EXTI_Line3);     /* Clear Flag */
  }
}

void EXTI4_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line4)!=RESET)
  {
      keys[2] = (keys[2] > 0)?(0x00):(0x01);
      EXTI_ClearITPendingBit(EXTI_Line4);     /* Clear Flag */
  }
}

void EXTI9_5_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line5)!=RESET)
  {
      keys[3] = (keys[3] > 0)?(0x00):(0x01);
      EXTI_ClearITPendingBit(EXTI_Line5);     /* Clear Flag */
  }
}