僅包含啟動(dòng)文件 "STM32F10x.s"

C代碼

#defineGPIOA_CRL(*(volatileunsignedlong*)(0x40000000+0x10000+0x0800+0x00))

#defineGPIOA_CRH(*(volatileunsignedlong*)(0x40000000+0x10000+0x0800+0x04))

#defineGPIOA_IDR(*(volatileunsignedlong*)(0x40000000+0x10000+0x0800+0x08))

#defineGPIOA_ODR(*(volatileunsignedlong*)(0x40000000+0x10000+0x0800+0x0C))

#defineRCC_APB2ENR(*(volatileunsignedlong*)(0x40000000+0x20000+0x1000+0x18))

voiddelay(unsignedlongi)//超級不精確的軟延時(shí)

{

intj;

while(i--)

{

for(j=0;j<1500;j++)

{}

}

}

intmain(void)

{

RCC_APB2ENR=1<<2;//打開PA時(shí)鐘,默認(rèn)啟用內(nèi)部8M時(shí)鐘

GPIOA_CRH&=0XFFFFFFF0;//準(zhǔn)備配置PA

GPIOA_CRH|=0X00000003;//PA8推挽輸出

GPIOA_ODR|=1<<8;//PA8輸出高,即先關(guān)閉led

while(1)

{

GPIOA_ODR&=0<<8;

delay(3000);

GPIOA_ODR|=1<<8;

delay(3000);

}

}