CHJ/user/MCU/lhl_exti.c

#include "../main/SystemInclude.h"

/**------------------------------------------------------------------------
  * @brief <EFBFBD>ⲿ<EFBFBD>жϳ<EFBFBD>ʼ<EFBFBD><EFBFBD>
  * @note   
	* @param  
  * @example:  
						GPIO_EXTI_Init(GPIO1,GPIO_PIN_7,EXTI_LINE_7,EXTI4_7_IRQn);
						GPIO_EXTI_Init(GPIO0,GPIO_PIN_3,EXTI_LINE_3,EXTI2_3_IRQn);
						GPIO_EXTI_Init(GPIO1,GPIO_PIN_0,EXTI_LINE_0,EXTI0_1_IRQn);
**/
void GPIO_EXTI_Init(GPIO_TypeDef* EXTI_GPIOx ,uint16_t EXTI_PINx ,EXTI_LINE_t EXTI_LINEx,IRQn_Type EXTI_IRQx)
{
	GPIO_InitTypeDef GPIO_InitStructure;// GPIO<49><4F><EFBFBD>ýṹ<C3BD><E1B9B9>
	EXTI_InitTypeDef EXTI_InitStructure;// EXTI<54><49><EFBFBD>ýṹ<C3BD><E1B9B9>
	/* 1. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ų<EFBFBD><C5B2><EFBFBD> */
	GPIO_InitStructure.Pin = EXTI_PINx;                // Pinx
	GPIO_InitStructure.Mode = GPIO_MODE_INPUT;          // <20><><EFBFBD><EFBFBD>ģʽ
//	GPIO_InitStructure.Pull = GPIO_NOPULL;              // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> GPIO_NOPULL
	GPIO_InitStructure.Pull = GPIO_PULLUP;  
	GPIO_InitStructure.SchmittTrigger = ENABLE;         // <20><><EFBFBD><EFBFBD>ʩ<EFBFBD><CAA9><EFBFBD>ش<EFBFBD><D8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	GPIO_InitStructure.Alternate = GPIOx_AF_GPIO;       
	LHL_GPIO_Init(EXTI_GPIOx, &GPIO_InitStructure);    // <20><>ʼ<EFBFBD><CABC>PinΪ<6E><CEAA><EFBFBD><EFBFBD>

	LHL_GPIO_SetEXTILine(EXTI_GPIOx, EXTI_PINx);       // <20><><EFBFBD><EFBFBD>PinΪEXTI0
    
	/* 2. <20><><EFBFBD><EFBFBD>EXTI<54><49><EFBFBD><EFBFBD> */     
	EXTI_InitStructure.Line = EXTI_LINEx;
	EXTI_InitStructure.Mode = EXTI_MODE_INTERRUPT;      // EXTI<54>ж<EFBFBD>ģʽ
	EXTI_InitStructure.Trigger = EXTI_TRIGGER_RISING_FALLING;  // <20><><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><C2BD>ش<EFBFBD><D8B4><EFBFBD>
	EXTI_InitStructure.LineCmd = ENABLE;                // ʹ<><CAB9>EXTI
	LHL_EXTI_Init(&EXTI_InitStructure);                 // <20><><EFBFBD><EFBFBD>EXTI

	NVIC_EnableIRQ(EXTI_IRQx);                       // <20><><EFBFBD><EFBFBD>NVIC<49>ж<EFBFBD>
	NVIC_SetPriority(EXTI_IRQx, 0);                  // <20><><EFBFBD><EFBFBD>EXIT3<54><33><EFBFBD>ȼ<EFBFBD>
}

/*-=====================================================================================================
//<2F>ж<EFBFBD>
-=====================================================================================================*/
/**------------------------------------------------------------------------
  * @brief <EFBFBD>жϻص<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD> 
  * @note   
	* @param   
  * @example: void Exti_irq_callback(void){}   Exti_register_irq_callback(EXTI_LINE_7,Exti_irq_callback);
**/ 
static exti_irq_callback_t    exti_callbacks[EXTI_MAX_LINES] = {NULL};
// ע<><D7A2><EFBFBD>ص<EFBFBD>
void Exti_register_irq_callback(EXTI_LINE_t exti_linex, exti_irq_callback_t exti_irq_callback)
{
		if (exti_linex == 0) return;//<2F><>ֹ<EFBFBD><D6B9>0 <20><><EFBFBD>߲<EFBFBD><DFB2><EFBFBD>EXTI_LINE_t<5F>IJ<EFBFBD><C4B2><EFBFBD>
    uint8_t index = (uint8_t)__builtin_ctz((unsigned int)exti_linex); //<2F><>ȡexti_linex <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    if (index >= EXTI_MAX_LINES) return; 
    exti_callbacks[index] = exti_irq_callback;
    switch (index) { //<2F><>ȡ EXTI <20>߶<EFBFBD>Ӧ<EFBFBD><D3A6> IRQ <20><>
        case 0:
        case 1:
            NVIC_EnableIRQ(EXTI0_1_IRQn);
            break;
        case 2:
        case 3:
            NVIC_EnableIRQ(EXTI2_3_IRQn);
            break;
        case 4:
        case 5:
        case 6:
        case 7:
            NVIC_EnableIRQ(EXTI4_7_IRQn);
            break;
        default:
            // <20><>֧<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD>
            break;
    }
}


void EXTI0_1_IRQHandler(void)
{
    // <20><><EFBFBD><EFBFBD> EXTI0 <20><> EXTI1
    if (LHL_EXTI_GetPending(EXTI_LINE_0) == SET) {
        LHL_EXTI_ClearPending(EXTI_LINE_0);
        if (exti_callbacks[0]) exti_callbacks[0]();
    }
    if (LHL_EXTI_GetPending(EXTI_LINE_1) == SET) {
        LHL_EXTI_ClearPending(EXTI_LINE_1);
        if (exti_callbacks[1]) exti_callbacks[1]();
    }
}

void EXTI2_3_IRQHandler(void)
{
    if (LHL_EXTI_GetPending(EXTI_LINE_2) == SET) {
        LHL_EXTI_ClearPending(EXTI_LINE_2);
        if (exti_callbacks[2]) exti_callbacks[2]();
    }
    if (LHL_EXTI_GetPending(EXTI_LINE_3) == SET) {
        LHL_EXTI_ClearPending(EXTI_LINE_3);
        if (exti_callbacks[3]) exti_callbacks[3]();
    }
}

void EXTI4_7_IRQHandler(void)
{
    for (int i = 4; i <= 7; i++) {
        EXTI_LINE_t line = (EXTI_LINE_t)(1U << i);
        if (LHL_EXTI_GetPending(line) == SET) {
            LHL_EXTI_ClearPending(line);
            if (exti_callbacks[i]) exti_callbacks[i]();
        }
    }
}