一、在PORTB口的小灯上循环显示跑马灯。
方法1:查表
#include /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
const unsigned char patten[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01}; void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i>=1;
PORTB|=0x80;
if(PORTB==0xFF)
PORTB=0x7F;
}
}
******************************************************************************* ******************************************************************************* 二、将PORTA口接8位DIP开关,在PORTB口的小灯上显示其状态。
方法1:DIP开关由A口输入,B口显示
#include /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
const unsigned char patten[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};//表格应该是没用
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specif
unsigned char flag;
const unsigned char patten[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
unsigned char flag;
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i>=1;
PORTB|=0x80;
if(PORTB==0xFF) PORTB=0x7F;
}
delay(j);
}
}
void interrupt 6 IRQ(void)
{
flag=1;
}
******************************************************************************* ******************************************************************************* 四、利用IRQ作为中断源,采用中断方式,利用8位DIP开关控制跑马灯的循环速度。#include /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
unsigned char flag;
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i>=1;
PORTB|=0x80;
if(PORTB==0xFF)
PORTB=0x7F;
}
}
void interrupt 6 IRQ(void)
{
flag=1;
}
******************************************************************************* ******************************************************************************* 五、利用XIRQ作为中断源,采用中断方式,利用8位DIP开关控制跑马灯的循环速度。方法同四,只是中断函数不同:
Void interrupt 5 XIRQ(void)
{
flag=1;
}
******************************************************************************* ******************************************************************************* 六、将PORTA口低4位接DIP开关,高4位接LED,将开关的状态显示在LED灯上,重复五
#include /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
unsigned char flag;
const unsigned char patten[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
unsigned char flag;
const unsigned char patten[16]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0 x80};
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
unsigned char flag;
void delay(unsigned int countert)
{
unsigned int i,j;
for(i=0;i>=1;
PORTB|=0x80;
if(PORTB==0xFF)
{
PORTB=0x3F;
for(;;)
{
delay(j);
PORTB>>=1;
PORTB|=0x80;
if(PORTB==0xFF)
{
PORTB=0x1F;
for(;;)
{
delay(j);
PORTB>>=1;
PORTB|=0x80;
delay(j);
if(PORTB==0xFF)
{
PORTB=0x0F;
for(;;)
{
delay(j);
PORTB>>=1;
PORTB|=0x80;
if(PORTB==0xFF) goto back;
}
}
}
}
}
}
}
}
void interrupt 6 IRQ(void)
{
flag=1;
}
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