芯片STM32F103ZET6 PG2接LED 内部RC 8M时钟
首先使能RCC_GPIOG时钟,选择GPIO模式,循环GPIOG->ODR^0XFF
代码如下:
Stack_Size EQU 0x00000400
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
__init_sp
AREA RESET, DATA, READONLY
__Vectors DCD __init_sp ;__initial_sp ; Top of Stack
DCD Reset_Handler ; Reset Handler
AREA |.text|, CODE, READONLY
THUMB
REQUIRE8
PRESERVE8
ENTRY
Reset_Handler
LDR R0,=0x40021018
MOV R1,#0XFFFF
STR R1,[R0] ;GPIOG_EN
LDR R0,=0x40012000
MOV R1,#0X0300
STR R1,[R0] ;GPIO_MODEL
LDR R3,=0X00
start
EOR R3,R3,#0XFF
MOV R2,R3