Linux实验二 花样流水灯加时钟 C语言程序代码

head.S

.text

.global _start

_start:

b Reset

b HandleUndef

b HandleSWI

b HandlePrefethAbort

b HandleDataAbort

b HandleNotUsed

b HandleIRQ

b HandleFIQ Reset:

ldr sp, =4096

bl disable_watch_dog

bl clock_init

bl init_led

bl main HandleUndef:

b HandleUndef HandleSWI:

b HandleSWI HandlePrefethAbort:

b HandlePrefethAbort HandleDataAbort:

b HandleDataAbort HandleNotUsed:

b HandleNotUsed HandleIRQ:

b HandleIRQ HandleFIQ:

b HandleFIQ

halt_loop:

b halt_loop

init.c

#include"s3c24xx.h"

void disable_watch_dog(void);

void clock_init(void);

#define GPCCON (*(volatile unsigned long *)0x56000020) #define GSTATUS1 (*(volatile unsigned long *)0x560000B0)

void disable_watch_dog(void)

{

WTCON=0;

}

void clock_init(void)

{

CLKDIVN=0X30;

__asm__(

"mrc p15, 0, r1, c1, c0, 0\n"

"orr r1, r1, #0xc0000000\n"

"mcr p15, 0, r1, c1, c0, 0\n"

);

if((GSTA TUS1==0x32410000)||(GSTATUS1==0X341002))

{

MPLLCON = ((0X5C<<12)|(0X04<<4)|(0X00));

}

}

#define GPC5_out (1<<(5*2))

#define GPC6_out (1<<(6*2))

#define GPC7_out (1<<(7*2))

#define GPG11_eint (2<<(11*/2))

#define GPG3_EINT (2<<(3*2))

#define GPF3_EINT (2<<(3*2))

#define GPF2_EINT (2<<(2*2))

void init_led(void)

GPCCON=GPC5_out|GPC6_out|GPC7_out;

}

Makefile

mpll.bin:head.S mpll.c init.c

arm-linux-gcc -g -c -o head.o head.S

arm-linux-gcc -g -c -o mpll.o mpll.c

arm-linux-gcc -g -c -o init.o init.c

arm-linux-ld -Ttext 0x00000000 -g head.o mpll.o init.o -o mpll_elf

arm-linux-objcopy -O binary -S mpll_elf mpll.bin

clean:

rm -f mpll.bin mpll_elf *.o

pp:

cp -f *.bin /mnt/armshare/dx2_1/

mpll.c

#include"s3c24xx.h"

#define GPCDAT (*(volatile unsigned long *)0x56000024)

void delay(unsigned int xx)

{

while(xx--);

}

int main()

{

while(1)

{

GPCDA T=~(1<<5);

delay(50000);

GPCDA T=~(1<<6);

delay(50000);

GPCDA T=~(1<<7);

delay(50000);

}

}