https://blog.csdn.net/cheapter/article/details/801981682.创建项目
https://blog.csdn.net/ssj925319/article/details/108919862#define PERIPH_BASE ((unsigned int)0x40000000)#define APB2PERIPH_BASE (PERIPH_BASE + 0x10000)#define GPIOA_BASE (APB2PERIPH_BASE + 0x0800)#define GPIOB_BASE (APB2PERIPH_BASE + 0x0C00)#define GPIOC_BASE (APB2PERIPH_BASE + 0x1000)#define GPIOD_BASE (APB2PERIPH_BASE + 0x1400)#define GPIOE_BASE (APB2PERIPH_BASE + 0x1800)#define GPIOF_BASE (APB2PERIPH_BASE + 0x1C00)#define GPIOG_BASE (APB2PERIPH_BASE + 0x2000)#define GPIOA_ODR_Addr (GPIOA_BASE+12) //0x4001080C#define GPIOB_ODR_Addr (GPIOB_BASE+12) //0x40010C0C#define GPIOC_ODR_Addr (GPIOC_BASE+12) //0x4001100C#define GPIOD_ODR_Addr (GPIOD_BASE+12) //0x4001140C#define GPIOE_ODR_Addr (GPIOE_BASE+12) //0x4001180C#define GPIOF_ODR_Addr (GPIOF_BASE+12) //0x40011A0C #define GPIOG_ODR_Addr (GPIOG_BASE+12) //0x40011E0C #define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))#define MEM_ADDR(addr) *((volatile unsigned long *)(addr))#define LED0 MEM_ADDR(BITBAND(GPIOA_ODR_Addr,8))typedef struct{ volatile unsigned int CR; volatile unsigned int CFGR; volatile unsigned int CIR; volatile unsigned int APB2RSTR; volatile unsigned int APB1RSTR; volatile unsigned int AHBENR; volatile unsigned int APB2ENR; volatile unsigned int APB1ENR; volatile unsigned int BDCR; volatile unsigned int CSR;} RCC_TypeDef;#define RCC ((RCC_TypeDef *)0x40021000)typedef struct{volatile unsigned int CRL;volatile unsigned int CRH;volatile unsigned int IDR;volatile unsigned int ODR;volatile unsigned int BSRR;volatile unsigned int BRR;volatile unsigned int LCKR;} GPIO_TypeDef;#define GPIOA ((GPIO_TypeDef *)GPIOA_BASE)void LEDInit( void ){ RCC->APB2ENR|=1<<2; GPIOA->CRH&=0XFFFFFFF0; GPIOA->CRH|=0X00000003; }void Delay_ms( volatile unsigned int t){ unsigned int i,n; for (n=0;n
https://blog.csdn.net/qq_33160790/article/details/766528392.如前面的一样建立一个工程，选芯片注意选择AT89C51。
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