信号发生器小程序.doc

#includereg52.h //包含头文件 #includeintrins.h #define uchar unsigned char //宏定义 #define uint unsigned int sbit s1=P3^5; //定义按键的接口 sbit s2=P3^6; sbit s3=P3^7; sbit lcdrs=P1^0; //液晶控制位 sbit lcden=P1^1; sbit csda=P3^3; //DA控制位 sbit wr=P3^4; char num=0,boxing,u; //定义全局变量 uint pinlv; uchar code table[]=0123456789; //定义显示的数组 uchar code table1[]=frequence:boxing:; uchar code sin[64]={ 135,145,158,167,176,188,199,209,218,226,234,240,245,249,252,254,254,253,251,247,243,237,230,222,213,204,193,182,170,158, 146,133,121,108,96,84,72,61,50,41,32,24,17,11,7,3,1,0,0,2,5,9,14,20,28,36,45,55,66,78,90,102,114,128 }; //正弦波取码 uchar code juxing[64]={ 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; //矩形波取码 uchar code sanjiao[64]={ 0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168,176,184,192,200,208,216,224,232,240,248, 248,240,232,224,216,208,200,192,184,176,168,160,152,144,136,128,120,112,104,96,88,80,72,64,56,48,40,32,24,16,8,0 }; //三角波取码 uchar code juchi[64]={ 0,4,8,12,16,20,24,26,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124, 128,132,136,140,144,148,152,156,160,164,168,172,176,180,184,188,192,196,200,204,208,212,216,220,224,228,232,236,240,244,248 }; //锯齿波取码 void delay(uint xms) //延时函数 { int a,b; for(a=xms;a0;a--) for(b=110;b0;b--); } void write_com(uchar com) //写命令函数 { lcdrs=0; P0=com; delay(1); lcden=1; delay(1); lcden=0; } void write_date(uchar date) //写数据函数 { lcdrs=1; P0=date; delay(1); lcden=1; delay(1); lcden=0; } void init_lcd() //初始化函数 { lcden=0; //默认开始状态为关使能端，见时序图 write_com(0x0f); write_com(0x38); //显示模式设置，默认为0x38,不用变。 write_com(0x01); //显示清屏，将上次的内容清除，默认为0x01. write_com(0x0c); //显示功能设置0x0f为开显示，显示光标，光标闪烁；0x0c为开显示，不显光标，光标不闪 write_com(0