安仁做网站,建站易,嘉兴网站推广优化,免费网站建站一、思维导图 二、练习
实现三个灯闪烁
汇编代码
.text
.global _start
_start: 使能GPIOE和F时钟LDR r0,0x50000A28LDR r1,[R0]ORR R1,R1,#(0X34)STR R1,[R0]配置GPIOE和F的MODER寄存器LDR r0,0x50006000 GPIOELDR R1,0X50007000 G…
一、思维导图 二、练习
实现三个灯闪烁
汇编代码
.text
.global _start
_start: 使能GPIOE和F时钟LDR r0,0x50000A28LDR r1,[R0]ORR R1,R1,#(0X34)STR R1,[R0]配置GPIOE和F的MODER寄存器LDR r0,0x50006000 GPIOELDR R1,0X50007000 GPIOFLDR R2,[R0]BIC R2,R2,#(0X320)BIC R2,R2,#(0X316)ORR R2,R2,#(0X120)ORR R2,R2,#(0X116)STR R2,[R0]LDR R2,[R1]BIC R2,R2,#(0X320)ORR R2,R2,#(0X120)STR R2,[R1]配置GPIOE和F的OTYPER寄存器LDR r0,0x50006004 GPIOELDR R1,0X50007004 GPIOFLDR R2,[R0]BIC R2,R2,#(0X110)BIC R2,R2,#(0X18)STR R2,[R0]LDR R2,[R1]BIC R2,R2,#(0X110)STR R2,[R1]配置GPIOE和F的OSPEEDR寄存器LDR r0,0x50006008 GPIOELDR R1,0X50007008 GPIOFLDR R2,[R0].text
.global _start
_start: 使能GPIOE和F时钟LDR r0,0x50000A28LDR r1,[R0]ORR R1,R1,#(0X34)STR R1,[R0]配置GPIOE和F的MODER寄存器LDR r0,0x50006000 GPIOELDR R1,0X50007000 GPIOFLDR R2,[R0]BIC R2,R2,#(0X320)BIC R2,R2,#(0X316)ORR R2,R2,#(0X120)ORR R2,R2,#(0X116)STR R2,[R0]LDR R2,[R1]BIC R2,R2,#(0X320)ORR R2,R2,#(0X120)STR R2,[R1]配置GPIOE和F的OTYPER寄存器LDR r0,0x50006004 GPIOELDR R1,0X50007004 GPIOFLDR R2,[R0]BIC R2,R2,#(0X110)BIC R2,R2,#(0X18)STR R2,[R0]BIC R2,R2,#(0X320)BIC R2,R2,#(0X316)STR R2,[R0]LDR R2,[R1]BIC R2,R2,#(0X320)STR R2,[R1]配置GPIOE和F的PUPDR寄存器LDR r0,0x5000600C GPIOELDR R1,0X5000700C GPIOFLDR R2,[R0]BIC R2,R2,#(0X320)BIC R2,R2,#(0X316)STR R2,[R0]LDR R2,[R1]BIC R2,R2,#(0X320)STR R2,[R1]
LOOP:BL LED_ONBL DELAYBL LED_OFFBL DELAYB LOOPLED_ON:GPIOELDR r0,0x50006014LDR r1,[R0]ORR R1,R1,#(0X110)ORR R1,R1,#(0X18)STR R1,[R0]GPIOFLDR r0,0x50007014LDR r1,[R0]ORR R1,R1,#(0X110)STR R1,[R0]MOV PC,LRLED_OFF:GPIOELDR R0,0x50006014LDR R1,[R0]BIC R1,R1,#(0X110)BIC R1,R1,#(0X18)STR R1,[R0]GPIOFLDR r0,0x50007014LDR r1,[R0]BIC R1,R1,#(0X110)STR R1,[R0]MOV PC,LRDELAY:LDR R3,0X10000000
MM:CMP R3,#0SUBNE R3,R3,#1BNE MMMOV PC,LR
.endMakefile
NAMEasm-led
CROSS_COMPILE arm-linux-gnueabihf-CC $(CROSS_COMPILE)gccLD $(CROSS_COMPILE)ld
OBJCOPY $(CROSS_COMPILE)objcopy
OBJDUMP $(CROSS_COMPILE)objdumpall:$(CC) -O0 -g -c $(NAME).S -o $(NAME).o$(LD) -Ttext0xC0008000 $(NAME).o -o $(NAME).elf $(OBJCOPY) -O binary $(NAME).elf $(NAME).bin$(OBJDUMP) -D $(NAME).elf $(NAME).dis
clean:rm -rf *.elf *.bin *.o *.disinstall:sudo cp $(NAME).bin /mnt/hgfs/share/
