keyscan.c

产生方波

#include "spce061a.h"
#include"bit.h"
#include"sp.h"
char number1[2]={'0','0'};
char i=1;
unsigned char number_i=0;
void pwm(unsigned char choice1)
{	
	if(choice1>6)
	{	i=6;
		*P_Watchdog_Clear =0x0001;
	}
	else if(choice1<0)
	{	i=0;
		 *P_Watchdog_Clear =0x0001;
	}
		else
		{
				switch(choice1)
				{	case 0:*P_TimerA_Ctrl=0x01f0;break;//占空比7/16
					case 1:*P_TimerA_Ctrl=0x01b0;break;//占空比6/16
					case 2:*P_TimerA_Ctrl=0x0170;break;//占空比5/16
					case 3:*P_TimerA_Ctrl=0x0130;break;//占空比4/16
					case 4:*P_TimerA_Ctrl=0x00f0;break;//占空比3/16
					case 5:*P_TimerA_Ctrl=0x00b0;break;//占空比2/16
					case 6:*P_TimerA_Ctrl=0x0070;break;//占空比1/16
					
				}
		}
	*P_Watchdog_Clear =0x0001;
}
void keyscan()
{	unsigned char hang,key,key_value;
	*P_Watchdog_Clear=0x0001;
		hang=0x01;
		P1_Lowbyte = hang;
    	key=P1_Lowbyte;
    	key_value=key&0xff;
    	if(key_value!=0&&number_i<2)
    		switch(key_value)
				{ 	case 0x05:pwm(i++);delay(2000);break; //按键S2按下，步进加1v
					case 0x09:number1[number_i]='1';number_i++;delay(2000);break; //LCD_clear_screen();number1[number_i]='0';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S4按下，
					case 0x11:number1[number_i]='2';number_i++;delay(2000);break;//LCD_clear_screen();number1[number_i]='1';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S6按下，
					case 0x21:number1[number_i]='3';number_i++;delay(2000);break; //LCD_clear_screen();number1[number_i]='2';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S8按下，
				}
		*P_Watchdog_Clear=0x0001;
		hang=0x02;
		P1_Lowbyte  = hang;
    	key=P1_Lowbyte;
    	key_value=key&0xff;
    	if(key_value!=0)
    		switch(key_value)
    		{		//case 0x06:pwm(i--);delay(2000);break; //LCD_clear_screen();number1[number_i]='3';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S1按下，步进减1v
					case 0x0a:number1[number_i]='4';number_i++;delay(2000);break; //LCD_clear_screen();number1[number_i]='4';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S3按下，
					case 0x12:number1[number_i]='5';number_i++;delay(2000);break; //LCD_clear_screen();number1[number_i]='5';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000);break; //按键S5按下，
					case 0x22:number1[number_i]='6';number_i++;delay(2000);break; //LCD_clear_screen();number1[number_i]='6';LCD_write_com(0x90);letter_display(&number1[number_i]);number_i++;delay(2000); break; //按键S7按下
    		}	
	*P_Watchdog_Clear =0x0001;	
	if(number_i==2)
	{	write_com(0x95);
		 hzkdis(number1);
		write_com(0x8e);
		 hzkdis(number1);
		number_i=0;
		*P_Watchdog_Clear =0x0001;
	}
}