学步园

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程序开始是参考OURAVR网友的例子成功收到台，由于程序生成的hex文件太大，2051装不下，只是放在博客发表，一直没有时间整理出来。后来深圳市广视美电子有限公司的老姜发了一份SP3767的参考代码给我，通过学习SP3767的代码，发现许多好的思路和方法，结合我自己开始写的的程序，修修改改改成了现在的程序。

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感谢OURAVR的网友和深圳市广视美电子有限公司的老姜提供的程序。
OURAVR网友原帖的地址：http://www.ouravr.com/bbs/bbs_content.jsp?bbs_sn=1117837&bbs_page_no=1&search_mode=1&search_text=5767&bbs_id=9999

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#include<reg51.H><br /> #include<math.h><br /> #include<I2C.c><br /> sbit KEY_0 = P1^2; //S3键，自动向上收台<br /> sbit KEY_1 = P1^3; //S2键，自动向下收台<br /> sbit KEY_2 = P1^4; //S1键，手动收台<br /> sbit have = P3^7; //收台标志，<br /> sbit band = P3^5; //边界标志，表示频率到达最小或最大值<br /> #define max_freq 1080<br /> #define min_freq 875<br /> #define point 0xfe //小数点<br /> unsigned char code led_7[10]={0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,0x01,0x09}; //0..9，数码管段码表<br /> unsigned char dis_buff[4]={3,5,9,0}; //显示缓冲区，低位在前<br /> unsigned char radio_write_data[5]={0x2d,0x56,0x20,0x11,0x00}; //要写入TEA5767的数据<br /> unsigned char radio_read_data[5]; //TEA5767读出的状态<br /> unsigned int default_pll=0x2d56; //0x2d56; //默认存台的pll,95.3MHz<br /> unsigned int pll;<br /> unsigned long frequency = 935;<br /> unsigned int max_pll=0x339b; //108MHz时的pll,<br /> unsigned int min_pll=0x9000; //70MHz时的pll`<br /> void uart_send_byte(unsigned char dat)<br /> {<br /> SBUF = dat;<br /> while (TI == 0); //循环等待<br /> TI = 0;<br /> }<br /> //由频率计算PLL<br /> void get_pll(void)<br /> {<br /> unsigned char hlsi;<br /> unsigned int twpll="0";<br /> hlsi="radio"_write_data[2]&0x10;<br /> if (hlsi)<br /> pll=((frequency * 100000) + 225000) >> 13; //频率单位:k ;<br /> else<br /> pll=((frequency * 100000) - 225000) >> 13; //频率单位:k<br /> }<br /> //由PLL计算频率<br /> void get_frequency(void)<br /> {<br /> unsigned char hlsi;<br /> unsigned int npll="0";<br /> npll="pll";<br /> hlsi="radio"_write_data[2]&0x10;<br /> if (hlsi)<br /> frequency=((((unsigned long)npll << 13) - 225000) / 100000) + 1; //频率单位:KHz<br /> else<br /> frequency=((((unsigned long)npll << 13) + 225000) / 100000) + 1; //频率单位:KHz<br /> }<br /> //频率值送显示缓冲区，低位在前<br /> // 高 108.0 低 Mhz<br /> //------------------<br /> //位数：<br /> void frequency_to_disbuff(void)<br /> {<br /> //unsigned long fre;<br /> //fre=f/100;<br /> dis_buff[3]=frequency / 1000; //第1位，1080/1000=1<br /> dis_buff[2]=frequency / 100 %10; //第2位，1080/100=10,10%10=0<br /> dis_buff[1]=frequency % 100 /10; //第3位, 1080%100=80,80/10=8<br /> dis_buff[0]=frequency % 10; //第4位, 1080%10=0<br /> }<br /> void FM_dis(void)<br /> {<br /> frequency_to_disbuff();<br /> uart_send_byte(led_7[dis_buff[0]]);<br /> uart_send_byte(led_7[dis_buff[1]]&point);<br /> uart_send_byte(led_7[dis_buff[2]]);<br /> if (dis_buff[3]==0)<br /> uart_send_byte(0xff);<br /> else<br /> uart_send_byte(led_7[dis_buff[3]]);<br /> }<br /> //写5767<br /> void radio_write(void)<br /> {<br /> unsigned char i;<br /> iic_start();<br /> iic_write8bit(0xc0); //TEA5767写地址<br /> waitack();<br /> for (i=0; i<5; i++)<br /> {<br /> iic_write8bit(radio_write_data[i]);<br /> waitack();<br /> }<br /> iic_stop();<br /> }<br /> //读TEA5767状态,并转换成频率<br /> void radio_read(void)<br /> {<br /> unsigned char i;<br /> unsigned char temp_l,temp_h;<br /> pll="0";<br /> iic_start();<br /> iic_write8bit(0xc1); //TEA5767读地址<br /> waitack();<br /> for (i=0; i<5; i++)<br /> {<br /> radio_read_data[i]=iic_read8bit();<br /> iic_ack();<br /> }<br /> iic_stop();<br /> temp_l = radio_read_data[1];<br /> temp_h = radio_read_data[0];<br /> temp_h &= 0x3f;<br /> pll="temp"_h * 256 + temp_l;<br /> get_frequency();<br /> }<br /> //手动设置频率,mode=1,+0.1MHz; mode="0:-0".1MHz ,不用考虑TEA5767用于搜台的相关位:SM,SUD<br /> void search()<br /> {<br /> radio_read();<br /> frequency ++;<br /> if (frequency > max_freq)<br /> {<br /> frequency = min_freq;<br /> band = 0;<br /> }<br /> else<br /> band = 1;<br /> get_pll();<br /> radio_write_data[0]=pll / 256;<br /> radio_write_data[1]=pll % 256;<br /> radio_write_data[2]=0x20;<br /> radio_write_data[3]=0x11;<br /> radio_write_data[4]=0x00;<br /> radio_write();<br /> }<br /> //自动搜台,频率增加搜台<br /> void auto_searchup()<br /> {<br /> radio_read();<br /> if (frequency>max_freq)<br /> {<br /> frequency=min_freq;<br /> band = 0;<br /> }<br /> else<br /> band = 1;<br /> get_pll();<br /> radio_write_data[2]=0xa0;<br /> radio_write_data[0]=pll / 256 + 0x40;<br /> radio_write_data[1]= pll % 256;<br /> radio_write_data[3]=0x11;<br /> radio_write_data[4]=0x00;<br /> radio_write();<br /> radio_read();<br /> }<br /> //自动搜台,频率减小搜台<br /> void auto_searchdown()<br /> {<br /> radio_read();<br /> if (frequency<min_freq)<br /> {<br /> frequency=max_freq;<br /> band = 0;<br /> }<br /> else<br /> band = 1;<br /> get_pll();<br /> radio_write_data[2]=0x20;<br /> radio_write_data[0]=pll / 256 + 0x40;<br /> radio_write_data[1]=pll % 256;<br /> radio_write_data[3]=0x11;<br /> radio_write_data[4]=0x00;<br /> radio_write();<br /> radio_read();<br /> }</p> <p>//ms延时<br /> void delay(unsigned int i)<br /> {<br /> unsigned char j;<br /> do {<br /> j = 163;<br /> do<br /> {<br /> }<br /> while (j --);<br /> }<br /> while (i --);<br /> }<br /> void main()<br /> {<br /> SCON = 0x00; //串口初始化，工作方式0, 同步移位寄存器输出方式<br /> FM_dis();<br /> delay(10);<br /> radio_write();<br /> while (1)<br /> {<br /> radio_read();<br /> P1=0xff;<br /> if (radio_read_data[0]&0x80) //搜台成功标志<br /> have = 0;<br /> else<br /> have = 1;</p> <p>//向上搜台<br /> if (KEY_0 == 0)<br /> {<br /> delay(10);<br /> if (KEY_0 == 0)<br /> {<br /> auto_searchup();<br /> while (KEY_0 == 0)<br /> {<br /> FM_dis();<br /> delay(5);<br /> }<br /> }<br /> }<br /> //向下搜台<br /> if (KEY_1==0)<br /> {<br /> if (KEY_1 == 0)<br /> {<br /> auto_searchdown();<br /> while (KEY_1 == 0)<br /> {<br /> FM_dis();<br /> delay(5);<br /> }<br /> }<br /> }<br /> //手动搜台，每次按下增加频率+0.1Mhz<br /> if (KEY_2==0)<br /> {<br /> if (KEY_2 == 0)<br /> {<br /> search();<br /> while (KEY_2 == 0)<br /> {<br /> FM_dis();<br /> delay(5);<br /> }<br /> }<br /> }<br /> }<br /> }