TQ2440裸奔程序>>EINT中断按键测试程序

//=========================================

// NAME: main.c

// DESC: TQ2440流水灯测试程序

// 板载LED为PB

//=========================================

/* 头文件包含 */
#define U32 unsigned int

/* 中断向量表 */

#define _ISR_STARTADDRESS 0x33ffff00

#define pISR_EINT0 (*(unsigned *)(_ISR_STARTADDRESS+0x20))

#define pISR_EINT1 (*(unsigned *)(_ISR_STARTADDRESS+0x24))

#define pISR_EINT2 (*(unsigned *)(_ISR_STARTADDRESS+0x28))

#define pISR_EINT4_7 (*(unsigned *)(_ISR_STARTADDRESS+0x30))

/* 中断控制 寄存器地址 */

#define rSRCPND (*(volatile unsigned *)0x4a000000) //Interrupt request status 源挂起寄存器

#define rINTMSK (*(volatile unsigned *)0x4a000008) //Interrupt mask control 中断屏蔽寄存器

#define rINTPND (*(volatile unsigned *)0x4a000010) //Interrupt request status 中断挂起寄存器

/* 外部中断 寄存器地址 */

#define rEXTINT0 (*(volatile unsigned *)0x56000088) //External interrupt control register 0 外部中断控制寄存器

#define rEINTMASK (*(volatile unsigned *)0x560000a4) //External interrupt mask 外部中断屏蔽寄存器

#define rEINTPEND (*(volatile unsigned *)0x560000a8) //External interrupt pending 外部中断挂起寄存器

/* LED灯寄存器地址 */

#define rGPBCON (*(volatile unsigned *)0x56000010) //Port B control

#define rGPBDAT (*(volatile unsigned *)0x56000014) //Port B data

#define rGPBUP (*(volatile unsigned *)0x56000018) //Pull-up control B

/* EINT F 寄存器地址 */

#define rGPFCON (*(volatile unsigned *)0x56000050) //Port F control

void led_init(void)

{

//板载LED为GPB[5:8]

rGPBCON = (rGPBCON & ~(0xff<<10)) | (0x55<<10); //rGPBCON为01 配置为输出

rGPBUP = rGPBUP | (0xf<<5); //rGPBUP为1 禁止上拉

rGPBDAT = rGPBDAT | (0xf<<5); //LED灯全关

}

void led_display(unsigned char data)

{

//0x0全灭 0xf全亮 0x01 0x02 0x04 0x80 各自灯亮

rGPBDAT = (rGPBDAT & ~(0xf<<5)) | ((~data) <<5);

}

void eint_init(void)

{

rGPFCON = 0xaaaa; //GPF[0:15]配置成外部中断

rSRCPND = rSRCPND | 0x1f; //清除EINT[0:7]源中断请求

rINTMSK = rINTMSK & ~(0x1f); //清除EINT[0:7]中断屏蔽请求

rINTPND = rINTPND | 0x1f; //清除EINT[0:7]中断挂起请求

rEINTPEND = rEINTPEND | (1<<4);

rEINTMASK = rEINTMASK & ~(1<<4);

rEXTINT0 = rEXTINT0 & ~((0x7<<0) | (0x7<<4) | (0x7<<8) | (0x7<<16));

rEXTINT0 = rEXTINT0 | ((0x2<<0) | (0x2<<4) | (0x2<<8) | (0x2<<16));//EINT下降沿触发方式 01x 0x2

}

static void __irq Key1_ISR(void) //EINT1

{

rSRCPND = rSRCPND | (0x1<<1);

rINTPND = rINTPND | (0x1<<1);

led_display(0x1);

}

static void __irq Key2_ISR(void) //EINT4

{

rSRCPND = rSRCPND | (0x1<<4);

rINTPND = rINTPND | (0x1<<4);

if(rEINTPEND & (1<<4))

{

rEINTPEND = rEINTPEND | (0x1<<4);

led_display(0x2);

}

}

static void __irq Key3_ISR(void) //EINT2

{

rSRCPND = rSRCPND | (0x1<<2);

rINTPND = rINTPND | (0x1<<2);

led_display(0x4);

}

static void __irq Key4_ISR(void) //EINT0

{

rSRCPND = rSRCPND | 0x1;

rINTPND = rINTPND | 0x1;

led_display(0x8);

}

void Main(void)

{

led_init();

eint_init();

/* 中断函数入口地址 */

pISR_EINT0 = (U32)Key4_ISR;

pISR_EINT1 = (U32)Key1_ISR;

pISR_EINT2 = (U32)Key3_ISR;

pISR_EINT4_7 = (U32)Key2_ISR;

while(1);

}