嵌入式系统设计技术ARM实验（1~4）

Posted 2022-11-30 Wang_rush

实验1&2：裸机下的led和蜂鸣器实验
DeepLed.c

#define         GPL2CON         (*(volatile unsigned long *) 0x11000100)
#define         GPL2DAT         (*(volatile unsigned long *) 0x11000104)
#define GPD0CON		(*(volatile unsigned long *) 0x114000A0)
#define GPD0DAT		(*(volatile unsigned long *) 0x114000A4)

#define 	GPK1CON 	(*(volatile unsigned long *) 0x11000060)
#define 	GPK1DAT		(*(volatile unsigned long *) 0x11000064)
void delay(int r0)

    volatile int count = r0;
    while (count--)
        ;

void led_blink()

	GPL2CON |= 0x00000001;
	GPK1CON |= 0x00000010;
	
	while(1)							
	
		GPL2DAT |= 1;
		GPK1DAT |= 0;
		delay(0x80000);
		GPL2DAT |= 0;
		GPK1DAT |= 0x2;
		delay(0x80000);
	

void main()

	GPD0CON |= 0x00000001;
	
	while(1)							
	
		GPD0DAT |= 1;
		delay(0x80000);
		GPD0DAT |= 0;
		delay(0x80000);
	

实验3&4：裸机条件下LED、蜂鸣器汇编综合设计实验
DeepLed.S

.text
.global _start
_start:
	ldr r1, =0x114000A0 //把GPDOCON的地址赋给r1
	ldr r0, [r1]			//取GPDOCON的内容到寄存器r0
	orr r0, r0, #0x1		//将r0最低位变成1
	str r0, [r1]			//r0的内容转移到GPD0CON
	ldr r1, =0x11000100	//找到GPL2CON的地址
	ldr r0, [r1]
	orr r0, r0, #0x1 		//只改变最低位
	str r0, [r1]			//r0寄存器的值传送到地址为r1的存储器中，把GPL2CON设置为0x1，GPL2作为输出
	ldr r1, =0x11000060	//找到GPK1CON的地址
	ldr r0, [r1]
	orr r0, r0, #0x10		//只改变了倒数第二位
	str r0, [r1]			//把GPK1CON设置为0x10，GPD1作为输出
loop:
//GPD0DAT 0x01
	ldr r1, =0x114000A4	//把GPD0DAT的地址赋给r1
	ldr r0, [r1]			//取GPD0DAT的内容到寄存器r0
	orr r0, r0, #0x1 		//将r0最低位变成1  蜂鸣器响
	str r0, [r1]			//r0的内容转移到GPD0DAT
//GPL2DAT 0x01
	ldr r1, =0x11000104	//找到GPL2DAT的地址
	ldr r0, [r1]
	orr r0, r0, #0x1 		//将GPL2DAT置一
	str r0, [r1]
//将GPK1DAT 0x00
	ldr r1, =0x11000064	//找到GPK1DAT的地址
	ldr r0, [r1];
	AND r0, r0, #0xfe		//将GPK1DAT清零
	str r0, [r1];
//延时
	ldr r2, =0x7ffffff	//设置延时时间
	bl delay			//延时
//GPL2DAT 0x00
	ldr r1, =0x11000104	//找到GPL2DAT的地址
	ldr r0, [r1]			
	AND r0, r0, #0xfe		//将GPL2DAT清零
	str r0, [r1];
//将GPK1DAT 0x01
	ldr r1, =0x11000064	//找到GPK1DAT的地址
	ldr r0, [r1]
	orr r0,r0,#0x2
	str r0, [r1]
//GPD0DAT 0x00;
	ldr r1, =0x114000A4	//把GPD0DAT的地址赋给r1
	ldr r0, [r1]			//取GPD0DAT的内容到寄存器r0
	AND r0, r0, #0xfe		//把r0最低位变成0
	str r0, [r1]			//r0的内容转移到GPD0DAT
	ldr r2, =0x7fffff	//延时
	bl delay
	b loop
halt:
	b halt
delay:
	sub r2, r2, #0x01
	cmp r2, #0x0
	bne delay
	mov pc , lr

Makefile 文件

DeepLed.bin: start.o DeepLed.o
	arm-none-linux-gnueabi-ld -Ttext 0x0 -o DeepLed.elf $^
	arm-none-linux-gnueabi-objcopy -O binary DeepLed.elf DeeLed.bin
	arm-none-linux-gnueabi-objdump -D DeepLed.elf > DeepLed_elf.dis


%.o : %.S
	arm-none-linux-gnueabi-gcc -o $@ $< -c -nostdlib
clean:
	rm *.o *.elf *.bin *.dis  -f

生成.bin文件