/***************************************************
程序功能：动态显示文字“welcome”
----------------------------------------------------
拨码开关设置：将LCD位拨至ON，其余拨至OFF
测试说明：观察液晶显示
****************************************************/
#include <msp430.h>
#include "Cry1602.h"
#include "Cry1602.c"
uchar *s1 = "welcome!";
void main( void )
{
/*下面六行程序关闭所有的IO口*/
P1DIR = 0XFF; P1OUT = 0XFF;
P2DIR = 0XFF; P2OUT = 0XFF;
P3DIR = 0XFF; P3OUT = 0XFF;
P4DIR = 0XFF; P4OUT = 0XFF;
P5DIR = 0XFF; P5OUT = 0XFF;
P6DIR = 0XFF; P6OUT = 0XFF;
uchar i;
WDTCTL = WDT_ADLY_250; //间隔定时器，定时16ms
P6DIR |= BIT2; P6OUT |= BIT2; //关闭电平转换
LcdReset();
DispStr(4,0,s1);
LocateXY(0,9); //确定写入字符的显示位置
LcdWriteCommand(0x07, 1); //整体显示左移
for(i = 12; i > 0; i--)
{
LcdWriteData(0x20);
//延时250ms
IFG1 &= ~WDTIFG;
while(!(IFG1 & WDTIFG));
IFG1 &= ~WDTIFG;
}
while(1)
{
LcdWriteCommand(0x05, 1); //整体显示右移
for(i = 24; i > 0; i--)
{
LcdWriteData(0x20);
//延时250ms
IFG1 &= ~WDTIFG;
while(!(IFG1 & WDTIFG));
IFG1 &= ~WDTIFG;
}
LcdWriteCommand(0x07, 1); //整体显示左移
for(i = 24; i > 0; i--)
{
LcdWriteData(0x20);
//延时250ms
IFG1 &= ~WDTIFG;
while(!(IFG1 & WDTIFG));
IFG1 &= ~WDTIFG;
}
}
}
为什么要用 WDTCTL = WDT_ADLY_250; //间隔定时器，定时16ms
在这个程序中的作用是干啥滴 |
|
楼主
