#include #define uchar unsigned char #define uint unsigned int #define LCD1602_DB P2 //数据端口 D0~D7 sbit R_LED=P1^0; //红灯引脚，高电平时点亮LED sbit G_LED=P1^1; //绿灯引脚，高电平时点亮LED sbit B_LED=P1^2; //蓝灯引脚，高电平时点亮LED sbit LCD1602_RS = P3^2; //1602的数据/指令选择控制线 sbit LCD1602_RW = P3^3; sbit LCD1602_E = P3^4; //1602的使能控制线 //Declare SFR associated with the ADC sfr AUXR = 0x8e; sfr ADC_CONTR = 0xC5; sfr ADC_DATA = 0xC6; sfr ADC_LOW2 = 0xBE; sfr P1M0 = 0x91; sfr P1M1 = 0x92; unsigned char R_OUT=0,G_OUT=0,B_OUT=0; //定义占空比计数变量 unsigned int MAX=200,MIN=1; //定义变色起始级数，范围最大可以0-255 unsigned char T0RH=0,T0RL=0; //定时器中间变量 bit time_flag0=0; //每10ms刷新一次占空比 bit time_flag1=0; //每2ms输出PWM uint count; void LedInit(void); void configtime0(unsigned int ms); //定时器0配置 void ConfigPWM(unsigned char t); //PWM占空比处理函数 void POUT(); void LCD1602_Init(); void LcdWaitReady(); void LCD1602_write_cmd(unsigned char cmd); void LCD1602_write_data(unsigned char date); void LCD1602_Clear();//清屏 void LCD1602_SetCursor(unsigned char x,unsigned char y); //设置光标初始位置 void LCD1602_ShowChar(unsigned char xpos,unsigned char ypos,unsigned char xsz); void LCD1602_ShowStr(unsigned char xpos,unsigned char ypos,unsigned char *p); void LCD1602_ShowNum(char x, char y, unsigned int num); //PWM输出函数 void Delay_ms(unsigned int nms); void LedInit(void) { P1M0 = 0x48; P1M1 = 0x4F; } main() { LedInit(); LCD1602_Init();//LCD初始化 configtime0(1); EA=1; count = 0; while(1) { count++; LCD1602_ShowNum(7,1,count); if(time_flag0 == 1) { time_flag0 = 0; ConfigPWM(1); } if(time_flag1 == 1) { time_flag1 = 0; POUT(); } } } //每调用一次此涵数，PWM占空比加一 void ConfigPWM(unsigned char t) //PWM占空比处理函数 { static unsigned char dir=0; //定义变亮或变暗方向 static unsigned char index=0; //定义变色索引 static unsigned int time=0; //中间变量 switch(index) { case 0: if(dir==0) //红色由暗变亮 { time+=t; R_OUT=time; G_OUT=0; B_OUT=0; if(time>=MAX) { dir=1; } } else //红色由亮变暗 { time-=t; R_OUT=time; G_OUT=0; B_OUT=0; if(time<=MIN) { dir=0; time=0; index=1; } } break; case 1: if(dir==0) //橙色由暗变亮 { time+=t; R_OUT=time; G_OUT=time/2; B_OUT=0; if(time>=MAX) { dir=1; } } else //橙色由亮变暗 { time-=t; R_OUT=time; G_OUT=time/2; B_OUT=0; if(time<=MIN) { dir=0; time=0; index=2; } } break; case 2: if(dir==0) //黄色由暗变亮 { time+=t; R_OUT=time; G_OUT=time; B_OUT=0; if(time>=MAX) { dir=1; } } else //黄色由亮变暗 { time-=t; R_OUT=time; G_OUT=time; B_OUT=0; if(time<=MIN) { dir=0; time=0; index=3; } } break; case 3: if(dir==0) //绿色由暗变亮 { time+=t; R_OUT=0; G_OUT=time; B_OUT=0; if(time>=MAX) { dir=1; } } else //绿色由亮变暗 { time-=t; R_OUT=0; G_OUT=time; B_OUT=0; if(time<=MIN) { dir=0; time=0; index=4; } } break; case 4: if(dir==0) //青色由暗变亮 { time+=t; R_OUT=0; G_OUT=time; B_OUT=time; if(time>=MAX) { dir=1; } } else //青色由亮变暗 { time-=t; R_OUT=0; G_OUT=time; B_OUT=time; if(time<=MIN) { dir=0; time=0; index=5; } } break; case 5: if(dir==0) //蓝色由暗变亮 { time+=t; R_OUT=0; G_OUT=0; B_OUT=time; if(time>=MAX) { dir=1; } } else //蓝色由亮变暗 { time-=t; R_OUT=0; G_OUT=0; B_OUT=time; if(time<=MIN) { dir=0; time=0; index=6; } } break; case 6: if(dir==0) //紫色由暗变亮 { time+=t; R_OUT=time; G_OUT=0; B_OUT=time; if(time>=MAX) { dir=1; } } else //紫色由亮变暗 { time-=t; R_OUT=time; G_OUT=0; B_OUT=time; if(time<=MIN) { dir=0; time=0; index=7; } } break; case 7: if(dir==0) //白色由暗变亮 { time+=t; G_OUT=time; B_OUT=time; R_OUT=time; if(time>=MAX) { dir=1; } } else //白色由亮变暗 { time-=t; G_OUT=time; B_OUT=time; R_OUT=time; if(time<=MIN) { dir=0; time=0; index=0; } } break; } } //输出占空比 void POUT() { unsigned char cnt; for(cnt=0;cnt>8); T0RL=(unsigned char)tmp; TH0=T0RH; TL0=T0RL; TMOD&=0xf0; TMOD|=0x01; TR0=1; ET0=1; } //定时器0中断涵数 void timer0() interrupt 1 //1ms中断 { static unsigned int tmr0; static unsigned int tmr1; TH0=T0RH; TL0=T0RL; tmr0++; tmr1++; if(tmr0>=10) //每10ms刷新一次占空比 { tmr0=0; time_flag0=1; } if(tmr1>=2) //2ms输出PWM { tmr1=0; time_flag1=1; } } void LCD1602_Init() //1602初始化函数 { LCD1602_write_cmd(0x01); //显示清屏 LCD1602_write_cmd(0x38); //显示模式设置 LCD1602_write_cmd(0x0C); //显示开及光标设置 LCD1602_write_cmd(0x06); //显示光标移动位置 } void LcdWaitReady() /* 等待液晶准备好 */ { unsigned char sta; LCD1602_DB = 0xFF; LCD1602_RS = 0; LCD1602_RW = 1; //读状态 do { LCD1602_E = 1; sta = LCD1602_DB; //读取状态字 LCD1602_E = 0; } while (sta & 0x80); //bit7等于1表示液晶正忙，重复检测直到其等于0为止 } void LCD1602_write_cmd(unsigned char cmd) //写命令函数 { LcdWaitReady(); LCD1602_RS = 0; LCD1602_RW = 0; LCD1602_DB = cmd; LCD1602_E = 1; Delay_ms(10); LCD1602_E = 0; } void LCD1602_write_data(unsigned char date) //写数据函数 { LcdWaitReady(); LCD1602_RS = 1; LCD1602_RW = 0; LCD1602_DB = date; LCD1602_E = 1; Delay_ms(10); LCD1602_E = 0; } void LCD1602_Clear() //1602清屏函数 { LCD1602_write_cmd(0x01); } void LCD1602_SetCursor(unsigned char x,unsigned char y)//设置1602光标位置函数 { unsigned char addr; if(y==0) //由输入的屏幕坐标计算显示RAM的地址 addr=0x00+x; else addr=0x40+x; LCD1602_write_cmd(addr | 0x80);//设置RAM地址 } void LCD1602_ShowNum(char x, char y, unsigned int num) //指定位置显示数字函数 { unsigned int i,j,k,l,n; i=num/10000; j=(num-10000*i)/1000; k=(num-10000*i-1000*j)/100; l=(num-10000*i-1000*j-100*k)/10; n=num%10; LCD1602_SetCursor(x,y); //设置起始地址 if(i!=0)LCD1602_write_data(i+0x30); if((i!=0)||(j!=0))LCD1602_write_data(j+0x30); if((i!=0)||(j!=0)||(k!=0))LCD1602_write_data(k+0x30); if((i!=0)||(j!=0)||(k!=0)||(l!=0))LCD1602_write_data(l+0x30); LCD1602_write_data(n+0x30); } void LCD1602_ShowChar(unsigned char xpos,unsigned char ypos,char xsz) //指定位置显示字符函数 { ypos%=2; if(ypos==0) { LCD1602_write_cmd(0x80+xpos); } else { LCD1602_write_cmd(0x80+0x40+xpos); } LCD1602_write_data(xsz); } void LCD1602_ShowStr(unsigned char xpos,unsigned char ypos,char *p) //指定位置显示字符串函数 { if(ypos>1)return; while(*p!='\0') { LCD1602_ShowChar(xpos++,ypos,*p++); if(*p=='\n') { xpos=0; ypos++; p++; } } } void Delay_ms(unsigned int nms) //@11.0592MHz nms为要延时的ms数 { unsigned char i, j; while(nms--) { i = 15; j = 90; do { while (--j); } while (--i); } }