O prezentare foarte detaliata se gaseste in fisa de catalog (datasheet) si in materialul producatorului, AN10133 - Low voltage FM stereo radio with TEA5767/68
Sunt cateva articole bune, care trateaza acest modul:
- TEA5767 (+ ATmega8) FM radio de pe site-ul http://tomeko.net/
- Making an FM radio-Part 1; the TEA5767 de pe http://ssihla.wordpress.com/
- Arduino FM receiver with TEA5767 de la electronicsblog.net (unde este detaliat si explicat un cod/sketch)
Fara a avea modulul radio conectat, am compilat codul de pe site si am gasit erori, in sensul ca s-au schimbat instructiunile din Wire.send in Wire.write...
asa ca am inlocuit termenii, iar noul sketch ar trebui sa arate asa:
/// Arduino FM receiver with TEA5767 http://www.electronicsblog.net
#include <Wire.h>
#include <LiquidCrystal.h>
unsigned char search_mode=0;
int b=0;
int c=0;
#define Button_next 30
#define Button_prev 31
unsigned char frequencyH=0;
unsigned char frequencyL=0;
unsigned int frequencyB;
double frequency=0;
double freq_available=0;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
Wire.begin();
lcd.begin(16, 2);
/// buttons
pinMode(Button_next, INPUT);
digitalWrite(Button_next, HIGH); //pull up resistor
pinMode(Button_prev, INPUT);
digitalWrite(Button_prev, HIGH); //pull up resistor
frequency=87.5; //starting frequency
frequencyB=4*(frequency*1000000+225000)/32768; //calculating PLL word
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
delay(100);
Wire.beginTransmission(0x60); //writing TEA5767
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x10);
Wire.write(0x00);
Wire.endTransmission();
delay(100);
}
void loop()
{
unsigned char buffer[5];
lcd.setCursor(0, 0);
Wire.requestFrom(0x60,5); //reading TEA5767
if (Wire.available())
{
for (int i=0; i<5; i++) {
buffer[i]= Wire.read();
}
freq_available=(((buffer[0]&0x3F)<<8)+buffer[1])*32768/4-225000;
lcd.print("FM ");
lcd.print((freq_available/1000000));
frequencyH=((buffer[0]&0x3F));
frequencyL=buffer[1];
if (search_mode) {
if(buffer[0]&0x80) search_mode=0;
}
if (search_mode==1) lcd.print(" SCAN");
else {
lcd.print(" ");
}
lcd.setCursor(0, 1);
lcd.print("Level: ");
lcd.print((buffer[3]>>4));
lcd.print("/16 ");
if (buffer[2]&0x80) lcd.print("STEREO ");
else lcd.print("MONO ");
}
///// buttons read
//////////// button_next//////////
if (!digitalRead(Button_next)&&!b) {
frequency=(freq_available/1000000)+0.05;
frequencyB=4*(frequency*1000000+225000)/32768+1;
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
Wire.beginTransmission(0x60);
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
//////////////////////
b=100;
};
if (!digitalRead(Button_next)&&b==1) {
///scannnn UP
search_mode=1;
Wire.beginTransmission(0x60);
Wire.write(frequencyH+0x40);
Wire.write(frequencyL);
Wire.write(0xD0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
/////////////////
b=100;
};
if (!b==0) b--;
//////////// button_prev//////////
if (!digitalRead(Button_prev)&&!c) {
frequency=(freq_available/1000000)-0.05;
frequencyB=4*(frequency*1000000+225000)/32768+1;
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
Wire.beginTransmission(0x60);
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
c=100;
};
if (!digitalRead(Button_prev)&&c==1) {
///scannnn DOWN
search_mode=1;
Wire.beginTransmission(0x60);
Wire.write(frequencyH+0x40);
Wire.write(frequencyL);
Wire.write(0x50);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
c=100;
};
if (!c==0) c--;
////////////////////
}
PS: in articol este folosit un Arduino Mega, asa ca pinii de inainte si inapoi trebuie redefiniti...
Am realizat si eu o varianta de montaj, cu o mufa pentru jack stereo:
27.06.2013
Primul pas, dupa conectare la o placa Arduino, a fost sa vad ce adresa de comunicare are pe i2c si aceasta este, ca in documentatia Philips/NXP, 0x60:
Am folosit metoda descrisa in articolul Interfata i2c la LCD pentru Arduino (i2c scanner).
Am conectat si afisajul cu cristale lichide pe 16 coloane a 2 randuri cu interfata i2c si am regasit adresa 0x20:
// Arduino FM receiver with TEA5767 http://www.electronicsblog.net
// using LCD16x2 with i2c interface, http://nicuflorica.blogspot.ro
// adapted skech by niq_ro
// version 1.1
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x20,16,2); // adress is 0x20 for LCD16x2
unsigned char search_mode=0;
int b=0;
int c=0;
#define Button_next 11
#define Button_prev 12
unsigned char frequencyH=0;
unsigned char frequencyL=0;
unsigned int frequencyB;
double frequency=0;
double freq_available=0;
void setup() {
Wire.begin();
lcd.init();
lcd.backlight(); //backlight is now ON
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
/// buttons
pinMode(Button_next, INPUT);
digitalWrite(Button_next, HIGH); //pull up resistor
pinMode(Button_prev, INPUT);
digitalWrite(Button_prev, HIGH); //pull up resistor
frequency=104.5; //starting frequency
frequencyB=4*(frequency*1000000+225000)/32768; //calculating PLL word
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
delay(100);
Wire.beginTransmission(0x60); //writing TEA5767
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x10);
Wire.write(0x00);
Wire.endTransmission();
delay(100);
}
void loop()
{
unsigned char buffer[5];
lcd.setCursor(0, 0);
Wire.requestFrom(0x60,5); //reading TEA5767
if (Wire.available())
{
for (int i=0; i<5; i++) {
buffer[i]= Wire.read();
}
freq_available=(((buffer[0]&0x3F)<<8)+buffer[1])*32768/4-225000;
lcd.print("FM ");
lcd.print((freq_available/1000000));
frequencyH=((buffer[0]&0x3F));
frequencyL=buffer[1];
if (search_mode) {
if(buffer[0]&0x80) search_mode=0;
}
if (search_mode==1) lcd.print(" SCAN");
else {
lcd.print(" ");
}
lcd.setCursor(0, 1);
lcd.print("Level: ");
lcd.print((buffer[3]>>4));
lcd.print("/16 ");
if (buffer[2]&0x80) lcd.print("STEREO ");
else lcd.print("MONO ");
}
///// buttons read
//////////// button_next//////////
if (!digitalRead(Button_next)&&!b) {
frequency=(freq_available/1000000)+0.05;
frequencyB=4*(frequency*1000000+225000)/32768+1;
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
Wire.beginTransmission(0x60);
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
//////////////////////
b=5;
delay(10);
};
if (!digitalRead(Button_next)&&b==1) {
///scannnn UP
search_mode=1;
Wire.beginTransmission(0x60);
Wire.write(frequencyH+0x40);
Wire.write(frequencyL);
Wire.write(0xD0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
/////////////////
b=50;
};
if (!b==0) b--;
//////////// button_prev//////////
if (!digitalRead(Button_prev)&&!c) {
frequency=(freq_available/1000000)-0.05;
frequencyB=4*(frequency*1000000+225000)/32768+1;
frequencyH=frequencyB>>8;
frequencyL=frequencyB&0XFF;
Wire.beginTransmission(0x60);
Wire.write(frequencyH);
Wire.write(frequencyL);
Wire.write(0xB0);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
c=5;
delay(10);
};
if (!digitalRead(Button_prev)&&c==1) {
///scannnn DOWN
search_mode=1;
Wire.beginTransmission(0x60);
Wire.write(frequencyH+0x40);
Wire.write(frequencyL);
Wire.write(0x50);
Wire.write(0x1F);
Wire.write(0x00);
Wire.endTransmission();
c=10;
};
if (!c==0) c--;
////////////////////
}
Am modificat un pic exemplul pentru afisajul meu cu interfata i2c si am obtinut:
Mai e "de lucrat" la exemplu asta deoarece nu are decat scanare inainte si inapoi, fara a opri sunetul in perioada cautarii (activare functie MUTE), dar ca exemplu de urmat e ok:
#include <TEA5767.h>
#include <Wire.h>
#include <Button.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x20,16,2); // adress is 0x20 for LCD16x2
// adapted sketch by niq_ro from http://nicuflorica.blogspot.ro
// version 2.0
TEA5767 Radio;
double old_frequency;
double frequency;
int search_mode = 0;
int search_direction;
unsigned long last_pressed;
Button btn_forward(11, PULLUP);
Button btn_backward(12, PULLUP);
void setup() {
Wire.begin();
Radio.init();
Radio.set_frequency(104.5);
Serial.begin(9600);
lcd.init();
lcd.backlight(); //backlight is now ON
lcd.begin(16,2);
lcd.clear();
}
void loop() {
unsigned char buf[5];
int stereo;
int signal_level;
double current_freq;
unsigned long current_millis = millis();
if (Radio.read_status(buf) == 1) {
current_freq = floor (Radio.frequency_available (buf) / 100000 + .5) / 10;
stereo = Radio.stereo(buf);
signal_level = Radio.signal_level(buf);
lcd.setCursor(0,0);
lcd.print("FM: "); lcd.print(current_freq);
lcd.print("MHz ");
lcd.setCursor(0,1);
if (stereo) lcd.print("STEREO "); else lcd.print("MONO ");
lcd.print(signal_level);
lcd.print("/15 ");
}
if (search_mode == 1) {
if (Radio.process_search (buf, search_direction) == 1) {
search_mode = 0;
}
}
if (btn_forward.isPressed()) {
last_pressed = current_millis;
search_mode = 1;
search_direction = TEA5767_SEARCH_DIR_UP;
Radio.search_up(buf);
delay(500);
}
if (btn_backward.isPressed()) {
last_pressed = current_millis;
search_mode = 1;
search_direction = TEA5767_SEARCH_DIR_DOWN;
Radio.search_down(buf);
delay(500);
}
delay(100);
}
Am facut si un filmulet, numit FM radio FM with TEA5767 and Arduino:
Sketch-ul fiind:
/*********************************************************************
This is an example sketch for our Monochrome Nokia 5110 LCD Displays
Pick one up today in the adafruit shop!
These displays use SPI to communicate, 4 or 5 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, check license.txt for more information
All text above, and the splash screen must be included in any redistribution
*********************************************************************/
// Nokia 5110 LCD (PCD8544) from https://code.google.com/p/pcd8544/
/* niq_ro ( http://nicuflorica.blogspot.ro ) case for Nokia 5110 LCD (PCD8544) - LPH 7366:
For module from China, you must connect like this:
* Pin 1 (RST) -> Arduino digital 6 (D6)
* Pin 2 (CE) -> Arduino digital 7 (D7)
* Pin 3 (DC) -> Arduino digital 5 (D5)
* Pin 4 (DIN) -> Arduino digital 4 (D4)
* Pin 5 (CLK) - Arduino digital 3 (D3)
* Pin 6 (Vcc) -> +5V thru adaptor module (see http://nicuflorica.blogspot.ro/2013/06/afisajul-folosit-la-telefoanele-nokia.html )
* Pin 7 (LIGHT) -> +5V thru 56-100 ohms resistor (for permanent lights) or... other pin control
* Pin 8 (GND) -> GND1 or GND2
*/
// adapted sketch by niq_ro from http://nicuflorica.blogspot.ro
// version 3.0
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
// Adafruit_PCD8544 display = Adafruit_PCD8544(SCLK, DIN, DC, CS, RST);
Adafruit_PCD8544 display = Adafruit_PCD8544(3, 4, 5, 7, 6);
#include <TEA5767.h>
#include <Wire.h>
#include <Button.h>
// TEA5767 begin
TEA5767 Radio;
double old_frequency;
double frequency;
int search_mode = 0;
int search_direction;
unsigned long last_pressed;
Button btn_forward(11, PULLUP);
Button btn_backward(12, PULLUP);
// TEA5767 end
void setup () {
Wire.begin();
Radio.init();
Radio.set_frequency(104.5);
Serial.begin(9600);
display.begin();
// init done
// you can change the contrast around to adapt the display
// for the best viewing!
display.setContrast(100);
display.clearDisplay();
// Print a logo message to the LCD.
display.setTextSize(1);
display.setTextColor(BLACK);
display.setCursor(0,0);
display.println("tehnic.go.ro");
display.setCursor(24, 8);
display.print("& niq_ro");
display.setCursor(1, 24);
display.print("radio FM");
display.setCursor(0, 32);
display.print("cu TEA5767");
display.setCursor(0, 40);
display.print("versiunea ");
display.setTextColor(WHITE, BLACK);
display.print("3.0");
display.display();
delay (5000);
display.clearDisplay();
}
void loop () {
unsigned char buf[5];
int stereo;
int signal_level;
double current_freq;
unsigned long current_millis = millis();
if (Radio.read_status(buf) == 1) {
current_freq = floor (Radio.frequency_available (buf) / 100000 + .5) / 10;
stereo = Radio.stereo(buf);
signal_level = Radio.signal_level(buf);
display.setTextSize(2);
display.setTextColor(BLACK);
display.setCursor(0,0);
display.print(display.print(current_freq));
display.setCursor(47,15);
display.print("MHz");
display.setCursor(0,20);
display.setTextSize(1);
display.setTextColor(BLACK);
if (stereo) display.print("STEREO"); else display.print("MONO");
// display level of FM signal..
display.setCursor(0,35);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.print(signal_level);
display.print("/15 ");
display.display();
delay (500);
display.clearDisplay();
// draw a signal level triangle...
display.drawLine(80, 30, 80, 45, BLACK);
display.drawLine(80, 45, 50, 45, BLACK);
display.drawLine(50, 45, 80, 30, BLACK);
int sl = signal_level;
for (int x = 0; x < sl; x++)
{
display.drawLine(50+2*x, 45, 50+2*x, 45-x, BLACK);
}
}
if (search_mode == 1) {
if (Radio.process_search (buf, search_direction) == 1) {
search_mode = 0;
}
}
if (btn_forward.isPressed()) {
last_pressed = current_millis;
search_mode = 1;
search_direction = TEA5767_SEARCH_DIR_UP;
Radio.search_up(buf);
delay(1000);
}
if (btn_backward.isPressed()) {
last_pressed = current_millis;
search_mode = 1;
search_direction = TEA5767_SEARCH_DIR_DOWN;
Radio.search_down(buf);
delay(1000);
}
delay(100);
}
Filmul cu acest afisaj se numeste FM radio with TEA5767 and Arduino (II):
