کد:
// TEA5767 und Nokia 5110 LCD Display
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
// D7 - Serial clock out (CLK oder SCLK)
// D6 - Serial data out (DIN)
// D5 - Data/Command select (DC oder D/C)
// D4 - LCD chip select (CE oder CS)
// D3 - LCD reset (RST)
Adafruit_PCD8544 lcd = Adafruit_PCD8544(7, 6, 5, 4, 3);
#include <Wire.h>
#define button_frequency_up 13
#define button_frequency_down 12
#define button_mute 11
#define TEA5767_mute_left_right 0x06
#define TEA5767_MUTE_FULL 0x80
#define TEA5767_ADC_LEVEL_MASK 0xF0
#define TEA5767_STEREO_MASK 0x80
int old_frequency=-1;
int frequency=10260;
byte old_stereo=0;
byte stereo=1;
byte old_mute=1;
byte mute=0;
byte old_signal_level=1;
byte signal_level=0;
unsigned long last_pressed;
void setup(void) {
pinMode(button_frequency_up, INPUT);
pinMode(button_frequency_down, INPUT);
pinMode(button_mute, INPUT);
Wire.begin();
TEA5767_set_frequency();
lcd.begin();
lcd.setContrast(60);
lcd.clearDisplay();
set_text(1,2,"FM Radio",BLACK,1);
//set_text(14,147,"blog.simtronyx.de",BLACK,1);
}
void loop() {
if(frequency!=old_frequency){
set_text(old_frequency>=10000?6:14,17,value_to_string(old_frequency),WHITE,2);
set_text(frequency>=10000?6:14,17,value_to_string(frequency),BLACK,2);
old_frequency=frequency;
}
TEA5767_read_data();
if(old_stereo!=stereo){
set_text(old_stereo?22:28,39,old_stereo?"Stereo":"Mono",WHITE,1);
set_text(stereo?22:28,39,stereo?"Stereo":"Mono",BLACK,1);
old_stereo=stereo;
}
if(old_signal_level!=signal_level){
set_text(old_signal_level<10?76:70,39,String((int)old_signal_level),WHITE,1);
set_text(signal_level<10?76:70,39,String((int)signal_level),BLACK,1);
old_signal_level=signal_level;
show_signal_level(signal_level);
}
if(old_mute!=mute){
set_text(1,39,old_mute?"M":"S",WHITE,1);
set_text(1,39,mute?"M":"S",BLACK,1);
old_mute=mute;
}
delay(50);
if(digitalRead(button_frequency_down)==HIGH){
frequency=frequency-5;
if(frequency<8750)frequency=10800;
TEA5767_set_frequency();
}
if(digitalRead(button_frequency_up)==HIGH){
frequency=frequency+5;
if(frequency>10800)frequency=8750;
TEA5767_set_frequency();
}
if(digitalRead(button_mute)==HIGH){
TEA5767_mute();
}
delay(50);
}
unsigned char frequencyH = 0;
unsigned char frequencyL = 0;
unsigned int frequencyB;
unsigned char TEA5767_buffer[5]={0x00,0x00,0xB0,0x10,0x00};
void TEA5767_write_data(byte data_size){
delay(50);
Wire.beginTransmission(0x60);
for(byte i=0;i<data_size;i++)
Wire.write(TEA5767_buffer[i]);
Wire.endTransmission();
delay(50);
}
void TEA5767_mute(){
if(!mute){
mute = 1;
TEA5767_buffer[0] |= TEA5767_MUTE_FULL;
TEA5767_write_data(2);
// TEA5767_buffer[0] &= ~TEA5767_mute;
// TEA5767_buffer[2] |= TEA5767_mute_left_right;
}
else{
mute = 0;
TEA5767_buffer[0] &= ~TEA5767_MUTE_FULL;
TEA5767_write_data(2);
// TEA5767_buffer[0] |= TEA5767_mute;
// TEA5767_buffer[2] &= ~TEA5767_mute_left_right;
}
// TEA5767_write_data(3);
}
void TEA5767_set_frequency()
{
frequencyB = 4 * (frequency * 10000 + 225000) / 32768;
TEA5767_buffer[0] = frequencyB >> 8;
if(mute)TEA5767_buffer[0] |= TEA5767_MUTE_FULL;
TEA5767_buffer[1] = frequencyB & 0XFF;
TEA5767_write_data(5);
}
int TEA5767_read_data() {
unsigned char buf[5];
memset (buf, 0, 5);
Wire.requestFrom (0x60, 5);
if (Wire.available ()) {
for (int i = 0; i < 5; i++) {
buf[i] = Wire.read ();
}
stereo = (buf[2] & TEA5767_STEREO_MASK)?1:0;
signal_level = ((buf[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
return 1;
}
else return 0;
}
void show_signal_level(int level){
byte xs=68;
byte ys=8;
for(int i=0;i<15;i++){
if(i%2!=0)lcd.drawLine(xs+i,ys,xs+i,ys-i/2,level>=i?BLACK:WHITE);
}
}
void set_text(int x,int y,String text,int color,int textsize){
lcd.setTextSize(textsize);
lcd.setTextColor(color);
lcd.setCursor(x,y);
lcd.println(text);
lcd.display();
}
String value_to_string(int value){
String value_string = String(value / 100);
value_string = value_string + '.' + ((value%100<10)?"0":"") + (value % 100);
return value_string;
}
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