stm32學(xué)習(xí):點(diǎn)亮一個(gè)led (精簡(jiǎn)版)

ID:161768 · 發(fā)表于 2017-2-9 22:32

僅包含啟動(dòng)文件 "STM32F10x.s"

#define GPIOA_CRL (*(volatile unsigned long *)(0x40000000+0x10000+0x0800+0x00))
#define GPIOA_CRH (*(volatile unsigned long *)(0x40000000+0x10000+0x0800+0x04))
#define GPIOA_IDR (*(volatile unsigned long *)(0x40000000+0x10000+0x0800+0x08))
#define GPIOA_ODR (*(volatile unsigned long *)(0x40000000+0x10000+0x0800+0x0C))
#define RCC_APB2ENR (*(volatile unsigned long *)(0x40000000+0x20000+0x1000+0x18))
void delay(unsigned long i) //超級(jí)不精確的軟延時(shí)
{
int j;
while(i--)
{
for(j=0;j<1500;j++)
{}
}
}
int main(void)
{
RCC_APB2ENR = 1<<2; //打開(kāi)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);
}
}

復(fù)制代碼

ID:170743 · 發(fā)表于 2017-3-14 20:57

不錯(cuò)，支持樓主

ID:167675 · 發(fā)表于 2017-3-15 14:57

GPIO這種入門我都不清楚，，，，怎么學(xué)習(xí) 第一步學(xué)習(xí)啥看數(shù)據(jù)手冊(cè)嗎額滴神

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