X9241控制程序.doc

/*标题：单片机控制T类功放实现功能：1：通过单片机控制X9241数字电位器四个电位器的阻值大小，从而调节功放前级处理芯片LM4610的音量、低音、高间、平衡音。 2：通过扫描功放芯处TA2020过载标志位，自动减少放大倍数，从而减少因输入信号过大而导致的失真。 3：通过控制功放TA2020的SLEEP和MUTE，消除功放在开机、关机时的冲击噪声。 4：通过控制继电器，从而控制环形变压器，保护芯片，减少待机功耗。 5：显示设备为12864液晶显示器。可显示当前音量、低音、高音、 平衡音的相对值， 6：输入设备有按键（采用行列式键盘：分8个：低音+、-，音量+-， 平衡音+-，高音+-. 7；可设置3D、金属音音效（通过短路帽连接）编写人:涂俊华 2010年11月10日 于湖南工学院*/*/#include #include #include #define uchar unsigned char#define uint unsigned int#define delayNOP(); _nop_();_nop_();_nop_();_nop_();#defineOP_READ0xa1/ 器件地址以及读取操作#defineOP_WRITE 0xa0/ 器件型号及地址 1010 A2 A1 A0 读/写控制#defineMAX_ADDR 0x7f/ AT24C02最大地址uchar code yejingtable=0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x20,0x2e,0x0f;/0-9 灭 小数点 星号sbit OVERLOAD = P22;sbit SCL = P23;sbit SDA = P24;void start();void stop();uchar shin();bit shout(uchar write_data);uchar read_random(uchar random_addr);void write_byte( uchar addr, uchar write_data);void fill_byte(uchar fill_data);void delayms(uchar ms);void delay(uint m);uchar table10;uchar keyscan();uchar bass,volume,balance,treble,time;/即四个电位器的相对值VR0,VR1,VR2,VR3void lcd_set();void write_cmd(uchar command);void write_data(uchar data0);void lcd_clear();void readall();void c_bass(uchar bass);void c_volume(uchar volume);void c_balance(uchar balance);void c_treble(uchar treble);void main(void)uchar m; EA=1;TMOD=0x01; ET0=1;/采用中断方式进行工作TH0=0X3C,TL0=0XB0;/采用定时器0开计时TR0=1; delayms(2000);/*c_bass(0x2f);c_volume(0x3f);c_balance(0x1f);c_treble(0x2f);*/readall();/读出当前各种相对值lcd_clear(); lcd_set(); display(1,3,敬请聆听); display(2,3,T 类音效);display(3,1,制作团队：);display(4,6,北斗星);/*while(1)if(OVERLOAD=0)volume-;c_volume(volume);readall();switch(keyscan()case c:bass-;time=0;if(bass=0) bass=1;c_bass(bass);readall();break;case d:bass+;time=0;if(bass=64) bass=63;c_bass(bass);readall();break;case e:volume-;time=0;if(volume=0) volume=1;c_volume(volume);readall();break;case f:volume+;time=0;if(volume=64) volume=63;c_volume(volume);readall();break;case 8:balance-;time=0;if(balance=0) balance=1;c_balance(balance);readall();break;case 9: balance+;time=0;if(balance=64) balance=63;c_balance(balance);readall();break;case a:treble-;time=0;if(treble=0) treble=1;c_treble(treble);readall();break;case b:treble+;time=0;if(treble=64) treble=63;c_treble(treble);readall();break;default :break;void start()/ 开始位SDA = 1;SCL = 1;_nop_();_nop_();_nop_();SDA = 0;_nop_();_nop_();_nop_();_nop_();SCL = 0;void stop()/ 停止位SDA = 0;SCL = 1;_nop_();_nop_();_nop_();SDA = 1;_nop_();_nop_();_nop_();_nop_();SDA = 0;uchar shin()/ 从AT24Cxx移入数据到单片机uchar i,read_data;SDA=1;for(i = 0; i 8; i+)read_data = 1;SCL = 1;_nop_();_nop_();_nop_();read_data |= (uchar)SDA;SCL = 0;return(read_data);bit shout(uchar write_data)/ 从单片机移出数据到AT24Cxx,已包含应答信号uchar i;bit ack_bit;for(i = 0; i 8; i+)/ 循环移入8个位SDA = (bit)(write_data & 0x80);_nop_();_nop_();_nop_();SCL = 1;_nop_();_nop_();_nop_();SCL = 0;write_data = 1;SDA = 1;/ 读取应答_nop_();_nop_();_nop_();_nop_();SCL = 1;_nop_();_nop_();_nop_();_nop_();_nop_();ack_bit = SDA;SCL = 0;return ack_bit;/ 返回AT24Cxx应答位void write_byte(uchar addr, uchar write_data)/ 在指定地址addr处写入数据write_datastart();shout(OP_WRITE);shout(addr);shout(write_data);stop();delayms(10);/ 写入周期void fill_byte(uchar fill_data)/ 填充数据fill_data到EEPROM内uchar i;for(i = 0; i MAX_ADDR; i+)write_byte(i, fill_data);uchar read_current()/ 在当前地址读取unsigned char read_data;start();shout(OP_READ);read_data = shin();stop();return read_data;uchar read_random(uchar random_addr)/ 在指定地址读取start();shout(OP_WRITE);shout(random_addr);return(read_current();void delayms(uint count) uint j; while(count-!=0) for(j=0;j82;j+); /*uchar keyscan()uchartemp,num=z;P1=0xfe;temp=P1;temp=temp&0xf0;while(temp!=0xf0)delayms(15);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xee:num=0;break;case 0xde:num=1;break;case 0xbe:num=2;break;case 0x7e:num=3;break;while(temp!=0xf0)/等待键松开temp=P1;temp=temp&0xf0;P1=0xfd;temp=P1;temp=temp&0xf0;while(temp!=0xf0)delayms(15);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xed:num=4;break;case 0xdd:num=5;break;case 0xbd:num=6;break;case 0x7d:num=7;break;while(temp!=0xf0)temp=P1;temp=temp&0xf0;P1=0xfb;temp=P1;temp=temp&0xf0;while(temp!=0xf0)delayms(15);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xeb:num=8;break;case 0xdb:num=9;break;case 0xbb:num=a;break;case 0x7b:num=b;break;while(temp!=0xf0)temp=P1;temp=temp&0xf0;P1=0xf7;temp=P1;temp=temp&0xf0;while(temp!=0xf0)delayms(15);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xe7:num=c;break;case 0xd7:num=d;break;case 0xb7:num=e;break;case 0x77:num=f;break;while(temp!=0xf0)temp=P1;temp=temp&0xf0;return num;/*/*写指令程序*/void write_cmd(uchar command) delay(100); rs=0; rw=0; P0=command; en=1; _nop_(); _nop_(); en=0;void write_data(uchar data0) delay(100); rs=1; rw=0; P0=data0; en=1; _nop_(); _nop_(); en=0;void lcd_set() write_cmd(0x34); write_cmd(0x30); write_cmd(0x01); write_cmd(0x06); write_cmd(0x0c);void lcd_clear() write_cmd(0x01); write_cmd(0x34); write_cmd(0x30);void delay(uint m) while(-m);void readall()lcd_clear();start();shout(0x50);/发送器件型号0101及地址0000shout(0x90);/发送读WCR命令1001 VR0 00 *bass=shin();/读取bass值stop();start();shout(0x50);/发送器件型号0101及地址0000shout(0x94);/发送读WCR命令1001 VR1 01 *volume=shin();/读取volume值stop();start();shout(0x50);/发送器件型号0101及地址0000shout(0x98);/发送读WCR命令1001 VR2 10 *balance=shin();/读取balance值stop();start();shout(0x50);/发送器件型号0101及地址0000shout(0x9c);/发送读WCR命令1001 VR3 11 *treble=shin();/读取treble值stop();display(1,1,低音相对值);display(2,1,音量相对值);display(3,1,平衡音相对值);display(4,1,高音相对值); write_cmd(0x87);write_data(yejingtablebass/10);write_data(yejingtablebass%10);write_cmd(0x97);write_data(yejingtablevolume/10);write_data(yejingtablevolume%10);write_cmd(0x8f);write_data(yejingtablebalance/10);write_data(yejingtablebalance%10);write_cmd(0x9f);write_data(yejingtabletreble/10);write_data(yejingtabletreble%10);/利用单片机显示数值/void c_bass(uchar bass)start();shout(0x50);/发送器件型号0101及地址0000shout(0xc0);/写数据shout(bass);/送一个中间值stop();delayms(100);start();shout(0x50);/发送器件型号0101及地址0000shout(0x10);/将VR0的阻值送给WCRstop();void c_volume(uchar volume)start();shout(0x50);/发送器件型号0101及地址0000shout(0xc4)