mdk5的安装与环境配置
将mdk5的安装包然后解压打开
然后确认
选择路径
填写基本信息
等待下载
如果链接失败就在这个网站下载:http://www.keil.com/dd2/pack
基础程序运行
打开软件
创建一个新的工程
运行如下代码
#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 )//使能时钟
{
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);
}
}
结果如下:
51电路仿真:
新建工程项目:

选择51芯片
写入代码
#include<reg51.h>
#include"intrins.h"
unsigned char status = 0xFe; //初始化P0为1111 1110 P00处的LED
unsigned int time = 0xFFFF; //LED点亮时间
void main(void){
while(1){
time = 0xFFFF;P0 = status;status = _crol_(status,1);while(time--);
}
}
得到结果

安装Prorteus Professional8
在Prorteus Professional8中画出如下仿真图

本文详细指导如何安装MDK5并配置开发环境,涉及GPIO基础设置,如GPIOA至GPIOG的偏移地址定义。通过实例演示了如何使用51单片机控制LED灯,包括时钟配置、GPIO功能设置及延时函数。最后展示了如何在ProteusProfessional8中进行电路仿真和LED代码实现。
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