NANO130_H2Press/User/gpio_key.c

#include "includes.h"

volatile uint8_t g_KeyVal = KEY_INVALID;

void Key_Init(void) 
{
    SYS->PE_H_MFP &= ~(SYS_PE_H_MFP_PE12_MFP_Msk | SYS_PE_H_MFP_PE11_MFP_Msk 
		| SYS_PE_H_MFP_PE10_MFP_Msk | SYS_PE_H_MFP_PE9_MFP_Msk);
    SYS->PE_H_MFP |= (SYS_PE_H_MFP_PE12_MFP_GPE12 | SYS_PE_H_MFP_PE11_MFP_GPE11 
		| SYS_PE_H_MFP_PE10_MFP_GPE10 | SYS_PE_H_MFP_PE9_MFP_GPE9);
    SYS->PB_H_MFP &= ~SYS_PB_H_MFP_PB9_MFP_Msk;
    SYS->PB_H_MFP |= SYS_PB_H_MFP_PB9_MFP_GPB9;

	/* Set GPIO Input */ 
    GPIO_SetMode(PE, BIT12, GPIO_PMD_INPUT);	// KEY_SET
    GPIO_SetMode(PE, BIT11, GPIO_PMD_INPUT);	// KEY_DOWN
    GPIO_SetMode(PE, BIT10, GPIO_PMD_INPUT);	// KEY_UP
    GPIO_SetMode(PE, BIT9, GPIO_PMD_INPUT);		// KEY_MENU
    GPIO_SetMode(PB, BIT9, GPIO_PMD_INPUT);		// KEY_SEND
	GPIO_ENABLE_PULL_UP(PB, BIT9);				// 允许内部弱上拉（无外部上拉）

	/* Interrupt Type: Falling Edge */ 
    GPIO_EnableInt(PE, 12, GPIO_INT_FALLING);
    GPIO_EnableInt(PE, 11, GPIO_INT_FALLING);
    GPIO_EnableInt(PE, 10, GPIO_INT_FALLING);
    GPIO_EnableInt(PE, 9, GPIO_INT_FALLING);
    GPIO_EnableInt(PB, 9, GPIO_INT_FALLING);

    /* Enable interrupt de-bounce function and select de-bounce sampling cycle time is 512 clocks of LIRC clock */
    GPIO_SET_DEBOUNCE_TIME(GPIO_DBCLKSRC_IRC10K, GPIO_DBCLKSEL_256);
    GPIO_ENABLE_DEBOUNCE(PE, BIT12);
    GPIO_ENABLE_DEBOUNCE(PE, BIT11);
    GPIO_ENABLE_DEBOUNCE(PE, BIT10);
    GPIO_ENABLE_DEBOUNCE(PE, BIT9);
    GPIO_ENABLE_DEBOUNCE(PB, BIT9);
}

void Key_Open()
{
	/* Enable GPIO IRQ */ 
	NVIC_SetPriority (GPDEF_IRQn, 2);
	NVIC_EnableIRQ(GPDEF_IRQn);

	NVIC_SetPriority (EINT0_IRQn, 3); 						  /* set Priority for On-Key Process */
	NVIC_EnableIRQ(EINT0_IRQn);
}

/**
 * @brief       GPIO DEF IRQ
 *
 * @param       None
 *
 * @return      None
 *
 * @details     The PE default IRQ, declared in startup_M451Series.s.
 */
void GPDEF_IRQHandler(void) 
{
	// 如果是加速度传感器中断
	if(GPIO_GET_INT_FLAG(PF, BIT5))
	{
		// 处理加速度中断
		Accelero_Handler();
	}
	
	// 如果是按键中断
	if(PE->ISRC)
	{
		// 处理按键中断
		Key_Handler();
	}
}

// 处理按键
void Key_Handler(void) 
{
	static uint32_t key_tick = 0;
	uint32_t tick = GetTickCount();
	
	// 保存键值
	uint8_t pe12 = PE12, pe11 = PE11, pe10 = PE10, pe9 = PE9;
	uint8_t pb9 = PB9;

	if(CLK->WK_INTSTS & CLK_WK_INTSTS_PD_WK_IS_Msk)
	{
		// 重新打开看门狗计数器
		WDT->CTL |= WDT_CTL_WTE_Msk;
	}

	// 清除中断标志
	PE->ISRC = PE->ISRC;
	GPIO_CLR_INT_FLAG(PB, BIT9);
	
	if(CLK->WK_INTSTS & CLK_WK_INTSTS_PD_WK_IS_Msk)
	{
		if((tick >= key_tick && tick - key_tick < 500) || (tick < key_tick && 0xFFFFFFFFul - key_tick + 1 + tick < 500))
		{
	//		printf("\n*** The 2nd key is ignored ***\n");
			return;
		}

		delay_ms(10);
		
		// 清除中断唤醒标志
//		CLK->WK_INTSTS |= CLK_WK_INTSTS_PD_WK_IS_Msk;
		
		Vcc_Enable();
		delay_ms(40);
		Wakeup_Sleeping = 0;
		
		// 判断是否为低电平，排除干扰
		if(PE12 && PE11 && PE10 && PE9 && PC7)
		{
			printf("\nWakeup by DISTURB ...\n");

			// 由干扰引起的按键中断，发信号休眠
			return;
		}

		if(pb9 == 0)
			printf("\n\nWake up by SEND KEY.\n\n");
		else	
			printf("\n\nWake up by KEY.\n\n");
		
		// 采集数据
		if(!Sample_Busy())
			NVIC_SetPendingIRQ(TMR1_IRQn);

		key_tick = GetTickCount();
	}

	// 如果是发送按键
	if(pb9 == 0)
	{
		// 强制定位
		GPS_Located = 0;
		GPS_Locate = 1;
		// 并发送
		if(CLK->WK_INTSTS & CLK_WK_INTSTS_PD_WK_IS_Msk)
			DTU_semSync = 1;
		else
			DTU_semGPRS = 1;
		return;
	}
	
	// 操作按键
	g_KeyVal = KEY_INVALID;	
	if(pe12 == 0)
	{
//		printf("\n----------- Key UP pressed -----------\n");
		g_KeyVal = KEY_UP;
	}
	else if(pe11 == 0)
	{
//		printf("\n----------- Key DOWN pressed -----------\n");
		g_KeyVal = KEY_DOWN;
	}
	else if(pe10 == 0)
	{
//		printf("\n----------- Key FUNC pressed -----------\n");
		g_KeyVal = KEY_FUNC;
	}
	else if(pe9 == 0)
	{
//		printf("\n----------- Key SET pressed -----------\n");
		g_KeyVal = KEY_SET;
	}
	
	if(g_KeyVal != KEY_INVALID)
	{
		// 重新计算时间
		Form_ResetTimer();

		// 不允许休眠
		LCD_Disabled = 0;
		
		NVIC_SetPendingIRQ(EINT0_IRQn);
	}	
}

void EINT0_IRQHandler(void)
{
	NVIC_ClearPendingIRQ(EINT0_IRQn);

	// 按键处理：放在中断里执行，以及时响应
	Form_OnKey(g_KeyVal);
}