梦想起航——电子琴,12864显示

/*********½ÓÊÕº¯Êý********/#includereg52.h#defineucharunsignedchar#defineuintunsignedintsbitled=P3^7;sbitrs=P2^6;sbitrw=P2^5;sbite=P2^7;sbitpsb=P3^2;sbitbuz=P2^0;ucharkey0;uchara[]={µç×ÓÇÙ};ucharcodetable[]={12345671};uintcodetoneh[8]={0xfc43,0xfcab,0xfd08,0xfd32,0xfd81,0xfdc7,0xfd5e,0xfe21};voiddelay_50us(uintt){ucharj;for(;t0;t--)for(j=19;j0;j--);}//ÑÓʱº¯Êý£¬ÔÚ12MHZµÄ¾§ÕñƵÂÊÏÂ//´óÔ¼50msµÄÑÓʱvoiddelay_50ms(uintt){uintj;for(;t0;t--)for(j=6245;j0;j--);}/********************************//*дָÁî*//********************************/voidwrite_12864com(ucharcom){rw=0;rs=0;delay_50us(1);P0=com;e=1;delay_50us(10);e=0;delay_50us(2);}/********************************//*дÊý¾Ý*//********************************/voidwrite_12864dat(uchardat){rw=0;rs=1;delay_50us(1);P0=dat;e=1;delay_50us(10);e=0;delay_50us(2);}/********************************//*³õʼ»¯*//********************************/voidinit_12864(void){delay_50ms(2);write_12864com(0x30);delay_50us(4);write_12864com(0x30);delay_50us(4);write_12864com(0x0c);//0x0e¹â±ê/0x0dΪÉÁ˸ÉèÖÃdelay_50us(4);write_12864com(0x01);//Çå³ýÏÔʾdelay_50us(240);write_12864com(0x06);delay_50us(10);}voidkey_scan(void){ucharkey_l,key_h;ucharkey;P1=0xf0;key_l=P1;key_l=key_l&0xf0;if(key_l!=0xf0){delay_50us(100);if(key_l!=0xf0){key_l=P1&0xf0;//11100000key_l=key_l|0x0f;//11101111P1=key_l;key_h=P1;key_h=key_h&0x0f;//00001110key_l=key_l&0xf0;//11100000key=key_h+key_l;//11101110}switch(key){case0xb7:key0=1;write_12864com(0x90);write_12864com(0x0f);break;//1case0xd7:key0=2;write_12864com(0x91);write_12864com(0x0f);break;//2case0xe7:key0=3;write_12864com(0x92);write_12864com(0x0f);break;//3case0x7b:key0=4;write_12864com(0x93);write_12864com(0x0f);break;//4case0xbb:key0=5;write_12864com(0x94);write_12864com(0x0f);break;//5case0xdb:key0=6;write_12864com(0x95);write_12864com(0x0f);break;//6case0xeb:key0=7;write_12864com(0x96);write_12864com(0x0f);break;//7case0x7d:key0=8;write_12864com(0x97);write_12864com(0x0f);break;//8default:break;}delay_50ms(10);write_12864com(0x0c);TR0=1;}else{buz=0;TR0=0;}}voiddisplay(){uchari;write_12864com(0x82);for(i=0;i6;i++){write_12864dat(a[i]);delay_50us(10);}write_12864com(0x90);write_12864dat(table[0]);delay_50us(10);write_12864com(0x91);write_12864dat(table[1]);delay_50us(10);write_12864com(0x92);write_12864dat(table[2]);delay_50us(10);write_12864com(0x93);write_12864dat(table[3]);delay_50us(10);write_12864com(0x94);write_12864dat(table[4]);delay_50us(10);write_12864com(0x95);write_12864dat(table[5]);delay_50us(10);write_12864com(0x96);write_12864dat(table[6]);delay_50us(10);write_12864com(0x97);write_12864dat(table[7]);delay_50us(10);}voidmain(void){init_12864();TMOD=0x01;ET0=1;EA=1;while(1){key_scan();display();}}voidmy_timer(void)interrupt1/*¶¨Ê±Æ÷1ÖжϷþÎñ³ÌÐò*/{buz=!buz;TH0=toneh[key0-1]/256;/*»ñÈ¡¸÷¼ü¶ÔÓ¦µÄÀÖÒôƵÂÊËùÐèµÄ¼ÆʱÆ÷¸ßλ³õÖµ*/TL0=toneh[key0-1]%256;/*»ñÈ¡¸÷¼ü¶ÔÓ¦µÄÀÖÒôƵÂÊËùÐèµÄ¼ÆʱÆ÷µÍλ³õÖµ*/}