嵌入式基础第三周作业

ARM开发环境入门

一、第一次的LED闪烁程序

用keil建立一个STM32工程，使得LED灯闪烁，由于没有板子，故只有程序只能在电脑上做仿真。 首先，在电脑上新建一个文件夹，然后打开keil建立一个新工程。 点击确认后在弹出的窗口中选择STM32F103RB芯片。 接下来创建一个main.c文件，并添加到工程中，点击保存。

然后复制 #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)) //#define LED0 *((volatile unsigned long *)(0x422101a0)) //PA8 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 时钟开启 GPIOA->CRH&=0XFFFFFFF0; GPIOA->CRH|=0X00000003; } //粗略延时 void Delay_ms( volatile unsigned int t) { unsigned int i,n; for (n=0;n<t;n++) for (i=0;i<800;i++); } int main( void ) { LEDInit(); while (1) { LED0=0; Delay_ms(500); LED0=1; Delay_ms(500); } } void SystemInit( void ) { }点击配置，勾选上create HEX File 然后阻再选择J-LINK下载工具

安装并熟悉Proteus 电路仿真软件，完成一个51程序设计和仿真

用keil编写以下代码 打开Proteus新建项目 1.选择AT89C51

双击AT89C51 载入HEX，点亮LED