PROG=led

 OBJS=led.o

 AS=arm-linux-as

 LD=arm-linux-ld

 OBJCOPY=arm-linux-objcopy

 AFLAGS=-march=armv5te

 LDFLAGS=-nostartfiles -nostdlib -Ttext=0x20008000 -e led //0x20008000 是内存地址

 $(PROG): $(OBJS)

     $(LD) $(LDFLAGS) -o $(PROG)  $(OBJS)

     $(OBJCOPY) -O binary $(PROG) $(PROG).bin

 %.o:%.s

     $(AS) $(AFLAGS) -o $@  $<   //$@ 表示所有目标文件  $< 表示所有依赖文件

 clean:

     @rm -vf $(OBJS) $(PROG) $(PROG).bin

 PROG=led_c

 OBJS=led_c.o

 AS=arm-linux-as

 CC=arm-linux-gcc

 LD=arm-linux-ld

 OBJCOPY=arm-linux-objcopy

 AFLAGS=-march=armv5te

 CFLAGS=-march=armv5te -nostdlib

 LDFLAGS=-nostartfiles -nostdlib -Ttext=0x20008000 -e led_main

 $(PROG): $(OBJS)

     $(LD) $(LDFLAGS) -o $(PROG)  $(OBJS)

     $(OBJCOPY) -O binary $(PROG) $(PROG).bin

 %.o:%.s

     $(AS) $(AFLAGS) -o $@  $<

 %.o:%.c

     $(CC) $(CFLAGS) -c -o $@  $<

 clean:

     @rm -vf $(OBJS) $(PROG) $(PROG).bin

 #define GPC0CON (*(volatile unsigned long*)0xE0200060)   //led

 #define GPC0DAT (*(volatile unsigned long*)0xE0200064)

 #define GPH0CON (*(volatile unsigned long*)0xE0200C00)        //key

 #define GPH0DAT (*(volatile unsigned long*)0xE0200C04)

 #define GPC03OUT (1<<(3*4))     //GPC0 3 led1  15-12位  0001为输出引脚

 #define GPC04OUT (1<<(4*4))        //GPC0 4 led2  19-16位

 #define GPH00IN ~(0xF<<(4*0))    //GPH0 0 key1     3-0位   0000为输入引脚

 #define GPH01IN ~(0xF<<(4*1)) //GPH0 1 key2  7-4位

 int main(void){

     //设置led1 2 GPC0CON 为输出引脚

     GPC0CON = GPC03OUT | GPC04OUT;

     //设置按键1 2 GPH0CON 为输出引脚

     GPH0CON = GPH00IN & GPH01IN;

     while(){

         if(GPH0DAT & 0x1){

             GPC0DAT = 0x00;

         }

         else{

             GPC0DAT = 0x08;

         }

         if(GPH0DAT & 0x02){

             GPC0DAT = 0x00;

         }

         else{

             GPC0DAT = 0x10;

         }

     }

 }

C = gcc 

CFLAGS = -c -Wall

OBJS=test.o hello.o

hello:$(OBJS)

    $(CC) $(OBJS) -o $@

    rm -rf *.o

%.o:%.c

    $(CC) -c $(CFLAGS) $<

clean:

    rm -rf hello *.o