mini2440裸机程序--LED灯（C语言）

        看了mini2440配套光盘里面的例子，C语言的点亮LED程序略显复杂。当时打开工程，看到这么多文件，顿时傻了眼。还好自己能够有良好的心态，慢慢弄。    

        对于点亮LED灯的C语言程序，相对于汇编程序，除了MDK系统自动添加的启动代码S3C2440.S ,其余的也就和汇编程序的步骤一样了。现在就把程序附在下面：

#define  rGPBCON  (*(volatile unsigned long *)0x56000010)

#define  rGPBDAT  (*(volatile unsigned long *)0x56000014)

#define  rGPBUP   (*(volatile unsigned long *)0x56000018)

#define GPB5_IN ~(3<<10)

#define GPB6_IN ~(3<<12)

#define GPB7_IN ~(3<<14)

#define GPB8_IN ~(3<<16)

#define GPB5_OUT (1<<10)

#define GPB6_OUT (1<<12)

#define GPB7_OUT (1<<14)

#define GPB8_OUT (1<<16)

#define LED1_ON ~(1<<5)

#define LED2_ON ~(1<<6)

#define LED3_ON ~(1<<7)

#define LED4_ON ~(1<<8)

#define LED1_OFF (1<<5)

#define LED2_OFF (1<<6)

#define LED3_OFF (1<<7)

#define LED4_OFF (1<<8)

void Led_Port_Init(void);

void Delay(int tt);

void main()

{

Led_Port_Init();

rGPBDAT |= (LED1_OFF|LED2_OFF|LED3_OFF|LED4_OFF);

while(1)

{

rGPBDAT = rGPBDAT&(LED1_ON);

Delay(1000);

rGPBDAT = rGPBDAT|((LED1_OFF)|(LED2_OFF)|(LED3_OFF)|(LED4_OFF));

Delay(1000);

rGPBDAT = rGPBDAT&(LED2_ON);

Delay(1000);

rGPBDAT = rGPBDAT|((LED1_OFF)|(LED2_OFF)|(LED3_OFF)|(LED4_OFF));

Delay(1000);

rGPBDAT = rGPBDAT&(LED3_ON);

Delay(1000);

rGPBDAT = rGPBDAT|((LED1_OFF)|(LED2_OFF)|(LED3_OFF)|(LED4_OFF));

Delay(1000);

rGPBDAT = rGPBDAT&(LED4_ON);

Delay(1000);

rGPBDAT = rGPBDAT|((LED1_OFF)|(LED2_OFF)|(LED3_OFF)|(LED4_OFF));

Delay(1000);

}

}

void Led_Port_Init(void)

{

rGPBCON &= ~((3<<10)|(3<<12)|(3<<14)|(3<<16));

    rGPBCON |= (1<<10)|(1<<12)|(1<<14)|(1<<16);

}

void Delay(int tt)

{

int a,b;

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

for(b=0;b<=10000;b++);

}