仿真+51单片机设计程序 基于单片机+TDA5767的收音机系统.rar

/******************************************************* * 文件名称：main.c * 说明：本文件为收音机的主函数 * 功能：1.命令发送，接收 2.调用函数 * 修改： 无 * 版本：1.0.0 * 作者：YuanDong * 时间：2009.7.20 *********************************************************/ #include <AT89X52.h> #include "iic.h" #include "3310LCD_function.c" #define uchar unsigned char #define uint unsigned int #define SLA_W 0b11000000 #define SLA_R 0b11000001 uchar senddata[5] ; uchar readdata[5] ; uchar search = 0; uchar search_up = 0; //--------------延时----------------- /******************************************************** *函数名称：void delay_ms(uint ms) *函数功能：延时ms *函数入口：ms *函数出口：无 ********************************************************/ void delay_ms(uint ms) { uint i,j; for(i=0;i<ms;i++) { j=1000; while(j--); } } /******************************************************** *函数名称：void set5767(void) *函数功能：设定收音机频率 *函数入口：无 *函数出口：无 ********************************************************/ void set5767(void) { uchar i = 0; iic_write(SLA_W); //发送地址 delay_ms(10); for ( i = 0; i < 5; i++ ) { iic_write(senddata[i]); //发送数据 delay_ms(10); } } /******************************************************** *函数名称：void read5767(void) *函数功能：读取收音机频率 *函数入口：无 *函数出口：无 ********************************************************/ void read5767(void) { uchar i = 0; iic_write(SLA_R); //发送地址 for ( i = 0; i < 5; i++ ) { readdata[i] =iic_read(); delay_ms(10); } } /******************************************************** *函数名称：void show_frequency(void) *函数功能：智能显示收音机频率 *函数入口：无 *函数出口：无 ********************************************************/ void show_frequency(void) { uint32_t nPLL =0; //Dec uint32_t frequency = 0; //Khz uchar display_bit[5]; uchar tbTmp1=readdata[1]; uchar tbTmp2=readdata[0]; tbTmp2&=0x3f; nPLL=tbTmp2*256+tbTmp1; // calculate searched station frequency if(senddata[2]&0x10) frequency =(unsigned long)(nPLL*82/10-225); else frequency =(unsigned long)(nPLL*82/10+225); display_bit[0] = frequency / 100000 ; if ( display_bit[0] == 0 ) display_bit[0] = 0x20; else display_bit[0] += 0x30; display_bit[1] = (frequency / 10000)%10 +0x30; display_bit[2] = (frequency / 1000)%10 +0x30; display_bit[3] = (frequency / 100)%10 +0x30; display_bit[4] = (frequency / 10)%10 +0x30; LCD_write_english_string(0,2," " ); LCD_write_char(display_bit[0]); LCD_write_char(display_bit[1]); LCD_write_char(display_bit[2]); LCD_write_english_string(25,2,"." ); LCD_write_char(display_bit[3]); LCD_write_char(display_bit[4]); LCD_write_english_string(43,2," MHz" ); } /******************************************************** *函数名称：void show_rx_power(void) *函数功能：智能显示收音机频率 *函数入口：无 *函数出口：无 ********************************************************/ void show_rx_power(void) { uchar temp; temp = (readdata[3]>>4); LCD_write_english_string(60,0," "); LCD_write_char((temp/10)%10 + 0x30 ); LCD_write_char(temp%10 + 0x30 ); } /******************************************************** *函数名称：void main(void) *函数功能：调用各个函数 *函数入口：无 *函数出口：无 ********************************************************/ void main(void) { senddata[0] = 0b01101111; //load 100MHz pll senddata[1] = 0b10010011; // away's low side injection senddata[2] = 0b00100000; senddata[3] = 0b10010000; senddata[4] = 0b00000000; readdata[0] = senddata[0]; readdata[1] = senddata[1]; LCD_write_english_string(0,0,"FM STEREO" ); LCD_write_english_string(0,2," 99.1Mhz" ); show_frequency(); LCD_write_inverse_string(0,5," UP "); LCD_write_inverse_string(48,5," DOWN "); while(1) { if ( P3_1==0 ) //清零按键 { delay_nms(20); if ( bit_is_clear( PIND,3)) { loop_until_bit_is_set(PIND, 3); LCD_write_english_string(0,4,"KEY1 press" ); senddata[2] &= 0x7f; // set search down set5767(); LCD_write_english_string(0,4,"searching down" ); search_up = 0; search = 1; } } if ( P3_2==0 ) { delay_nms(20); if ( bit_is_clear( PIND,2)) { loop_until_bit_is_set(PIND, 2); LCD_write_english_string(0,4,"KEY2 press" ); senddata[2] |= 0x80; // set search up set5767(); LCD_write_english_string(0,4,"searching up "); search_up = 1; search = 1; } } if ( search ) { read5767(); if ( readdata[0] & 0x40 ) //reach band end { if ( search_up ) { senddata[0] = 0b01101001; // load 88Mhz pll senddata[1] = 0b11011010; set5767(); } else { senddata[0] = 0b01110011; // load 108Mhz pll senddata[1] = 0b01100100; set5767(); } } if ( readdata[0] & 0x80) //has been found a station { show_frequency(); show_rx_power(); senddata[0] = ((readdata[0] & 0x3f) |0x40); senddata[1] = readdata[1]; //record the pll search = 0; } } } }