求 嵌入式ARM中 注明开发板型号 LED一盏灯亮，灭，中间设置延迟。c 或汇编

硬件平台：FS2410开发平台：MDK3.5程序源码：GPFCON EQU 0x56000050 Port F control

GPFDAT EQU 0x56000054 Port F data

GPFUP EQU 0x56000058 Pull-up control F

AREA myarea, CODE

ENTRY LDR r0, =0x5500

LDR r1, = GPFCON

STR r0,[r1] LDR r0, = 0x0

LDR r1, =GPFUP

STR r0,[r1]

start_while

LDR r0, = 0x0

LDR r1, =GPFDAT

STR r0,[r1] LDR r0, =0xffffloop1

SUBS r0,r0, #1

BNE loop1 LDR r0, = 0xF0

LDR r1, =GPFDAT

STR r0,[r1] LDR r0, =0xffff

loop2

SUBS r0,r0, #1

BNE loop2 B start_whilestop

B stop

END

void delay_10us(void) //10us延时函数,,可重复调用不影响精度

{

asm("nop")

asm("nop")

asm("nop")

}

用软件跟踪调试一下就可以，看走了多少步。如不够可以再加asm("nop")

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