TQ2440裸奔程序>>流水灯测试程序

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

// NAME: main.c

// DESC: TQ2440流水灯测试程序

// 板载LED为GPB[5:8]

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

/* 头文件包含 */

/* 端口B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

void delay(int a)

{

int k;

for(k=0;k<a;k++)

{;}

}

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)) | (0xf<<5); //rGPBUP为1 禁止上拉

rGPBDAT = (rGPBDAT & ~(0xf<<5)) |(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 Main(void)

{

led_init();

while(1)

{

led_display(0x1);

delay(500000);

led_display(0x3);

delay(500000);

led_display(0x7);

delay(500000);

led_display(0xf);

delay(500000);

led_display(0x0);

delay(500000);

}

}