min2440上实现LED灯和蜂鸣器的轮转

来源：互联网发布：同性恋软件 blued下载编辑：程序博客网时间：2024/05/01 21:04

刚开始学写ARM的裸机程序，就先写了段在mini2440板子上的实现LED灯，蜂鸣器的交替闪亮和鸣响。

整个程序有两个文件组成，汇编写的初始化程序和C写的控制程序，现列在下面

;Init.S

AREA init,CODE,READONLY
ENTRY
IMPORT Main
LDR R13,=0x1000
BL Main
STOP
B STOP
END

//gpio_led.c

#define rGPBCON (*(volatile unsigned long *)0x56000010)
#define rGPBDAT (*(volatile unsigned long *)0x56000014)
#define rGPBUP (*(volatile unsigned long *)0x56000018)
//GPB0 控制PWM
//GPB5 控制LED1 低电平点亮
//GPB6 控制LED2 低电平点亮
//GPB7 控制LED3 低电平点亮
//GPB8 控制LED4 低电平点亮

void Delay(int time)
{
unsigned int i;
for(i=0;i<time;i++)
;
}

void LED1_Delay(char x)
{
if( x == 1)
rGPBDAT = rGPBDAT& 0xffffffdf; //点亮
else if( x == 0)
rGPBDAT = rGPBDAT | 0x00000020;//熄灭
Delay(100000);
}

void LED2_Delay(char x)
{
if( x == 1)
rGPBDAT = rGPBDAT& 0xffffffbf; //点亮
else if( x == 0)
rGPBDAT = rGPBDAT | 0x00000040;//熄灭
Delay(100000);
}

void LED3_Delay(char x)
{
if( x == 1)
rGPBDAT = rGPBDAT& 0xffffff7f; //点亮
else if( x == 0)
rGPBDAT = rGPBDAT | 0x00000080;//熄灭
Delay(100000);
}

void LED4_Delay(char x)
{
if( x == 1)
rGPBDAT = rGPBDAT& 0xfffffeff; //点亮
else if( x == 0)
rGPBDAT = rGPBDAT | 0x00000100;//熄灭
Delay(100000);
}

void Beep_Delay(char x)
{
if( x == 1)
rGPBDAT = rGPBDAT& 0xfffffffe; //点亮
else if( x == 0)
rGPBDAT = rGPBDAT | 0x00000001;//熄灭
Delay(100000);
}

int Main(void)
{
// rGPBCON = rGPBCON &0xfffd57fd;
// rGPBCON = rGPBCON | 0x00015401;

rGPBCON = rGPBCON &(~((3)|(3<<10)|(3<<12)|(3<<14)|(3<<16)));
rGPBCON = rGPBCON |((1)|(1<<10)|(1<<12)|(1<<14)|(1<<16));

while(1)
{
  LED1_Delay(1);
  LED1_Delay(0);
  LED2_Delay(1);
  LED2_Delay(0);
  LED3_Delay(1);
  LED3_Delay(0);
  LED4_Delay(1);
  LED4_Delay(0);
  Beep_Delay(1);
  Beep_Delay(0);
  Beep_Delay(1);
}

return 0;
}