PWM(占空比可调).docx

PWM_Period_Cont.C/*TITLE: 产生占空比可调的PWM波形 FUNCTION: 通过按键实现占空比的调整，并在数码管上显示WRITER: LINLIANHUOTIME: 2014-7-31ATTENTION：没有调试成功 */#include #include SMG.H#include PWM.H#include KEY.H#define uint unsigned int#define uchar unsigned charuchar period_cnt_num; /占空比值=num/100uchar key_value;void main() smg_init();key_init();PWM_init();EA=1;key_value=get_key_value();period_cnt_num=1;while(1) if(key_value!=KEY_NULL) if(key_value=KEY_UP) if(period_cnt_num1)period_cnt_num-;/else/period_cnt_num=99;PWM_set(period_cnt_num);smg_write(period_cnt_num%10+0,0x01,SMG_DIS_DIGIT);smg_write(period_cnt_num%10+0,0x02,SMG_DIS_DIGIT);KEY.H/* - THE KEY FUNCTION LIB - COPYRIGHT (C) 2014 BY LLH - ALL RIGHTS RESERVED -*/#ifndef _KEY_FUN_H_#define _KEY_FUN_H_#define uint unsigned int#define uchar unsigned charenum KEY_VALUEKEY_UP= 0x01,KEY_DOWN= 0x02,KEY_NULL = 0x00;/#define KEY_UP 0X01/#define KEY_DOWN 0X02/#define KEY_NULL 0X01#define READ_KEY(x,name,b) (x)?(b|=name):(b&=name) )#define CAN_MORE_PRESS 0 /* 是否允许多键都按: 允许为1;不允许为0 */#define CAN_REPEAT 1 /* 是否允许重复按键: 允许为1;不允许为0 */#define REPEAT_MODE 1 /* 重复模式: 先长后短为1;相同间隔为0 */#define FIRST_TIMES 200 /* 重复按下时,第一次间隔时间 */#define OTHER_TIMES 25 /* 第二次后间隔时间(如果重复模式为0时此值无效) */#define KEY_DELAY_TIME 20 /* 键盘扫描时间间隔XXXus */#define KEY_FORCE_VALUE 0#define IN_PRESS_UP P10 /*1设置键端口 */#define IN_PRESS_DOWN P11 /*2设置键端口 */ uchar keyValueBuff; /*读取键值的缓冲区*/ uchar keyValueOld; /*前一次的键值*/ uchar keyValueTemp; /*键值中间交换变量*/ uint stillTimes; /*键按下保持次数*/ uint stillTimesMax; uchar temp;/sbit k1=P10;/sbit k2=P11;/*按键的检测*uchar keyscan() if(k1=0)return KEY_UP;if(k2=0)return KEY_DOWN;if(k1!=0)&(k2!=0)return KEY_NULL;*/*按键初始化*/void key_init(void) keyValueBuff = 0x00; keyValueOld = 0x00; keyValueTemp = 0x00; stillTimes = 0; stillTimesMax = FIRST_TIMES;/*按键的检测*/void read_all_key(uchar *buff) if(IN_PRESS_UP=KEY_FORCE_VALUE) /检测按下的键 READ_KEY(1,KEY_UP,*buff); else READ_KEY(0,KEY_UP,*buff); if(IN_PRESS_DOWN=KEY_FORCE_VALUE) READ_KEY(1,KEY_DOWN,*buff); else READ_KEY(0,KEY_DOWN,*buff);/*读值*/uchar get_key_value(void) keyValueBuff = 0x00; read_all_key(&keyValueBuff); keyValueTemp = keyValueBuff; delayus(KEY_DELAY_TIME); read_all_key(&keyValueBuff); /* 两次读到的键盘值相同 则为有效键盘值 */ if( keyValueTemp = keyValueBuff ) temp=get_data_count(keyValueTemp); if(keyValueTemp = 0) keyValueOld = 0; stillTimes = 0; stillTimesMax = FIRST_TIMES; return 0; else if(keyValueOld != keyValueTemp) stillTimes = 0; keyValueOld = keyValueTemp; if(CAN_MORE_PRESS) return keyValueTemp; else if( 1 =temp ) return keyValueTemp; else return 0; else if(keyValueOld = keyValueTemp) if (CAN_MORE_PRESS = 0) if( 1 != temp ) stillTimes = 0; return 0; if (CAN_REPEAT) stillTimes +; if(stillTimes stillTimesMax) stillTimes = 0; if (REPEAT_MODE) if(FIRST_TIMES = stillTimesMax) stillTimesMax = OTHER_TIMES; return keyValueTemp; else stillTimes = 0; return 0; else stillTimes = 0; return 0; return 0;/*函数名称：get_data_1_count(uchar number)*函数功能：计算uchar类型变量中1的数量，用于检测是否多键按下*函数入口：number,需要检测1数量的变量*函数出口：返回变量bumber中1的数量*/uchar get_data_count(uchar number) uchar i,j = 0,a=0x01; for(i = 0; i 8; i +) if(number&a) j +; a=a=1)&(date=99) pwm_value=date;elsepwm_value=1; /不在099范围内，输出一个1:99的脉冲/*T1定时中断服务程序*/void T1_int() interrupt 3 using 0pwm_per_cnt+;if(pwm_per_cnt=PWM_Period)pwm_per_cnt=0; TH1=255-10;TL1=255-10;#endifSMG.H/* - THE SMG DISPLAY LIB - COPYRIGHT (C) 2014 BY LLH - ALL RIGHTS RESERVED -*/#ifndef _SMG_DIS_H_#define _SMG_DIS_H_#define uint unsigned int#define uchar unsigned charenum SEG_DISPLAY_MODSMG_DIS_DIGIT=0x00,SMG_DIS_CHAR=0x01;#define TURE 1#define FALSE 0/#define SMG_DIS_CHAR 0x01/#define SMG_DIS_DIGIT 0x00sbit SMG_CS1=P20;sbit SMG_CS2=P21;uchar code smg_table=0x7e,0x30,0x6d,0x79,0x33,0x5b,0x5f,0x70,0x7f,0x7b;/*us延时子程序*/void delayus(uint x) uchar i; while(-x) for(i=0;i10;i+); /*数码管数据写入子程序*/void smg_write(uchar content,uchar smg_x,uchar model) if(SMG_DIS_CHAR=model)/字符显示P0=content;elseif(SMG_DIS_DIGIT=model)/数字显示P0=smg_tablecontent-0;if(smg_x&0xff)=0