In articolul precedent am folosit o placa de dezvoltare Arduino Mega, dar pentru a putea trece, ulterior, proiectul pe un cablaj separat, am adaptat schema pentru Arduino Uno.
Schema devine:
Modificarile se datoreaza modului diferit de pozitionare a anumitor pini "specializati" la Arduino Uno (si derivate): - pentru comunicatia i2c necesara modului radio cu TEA5767 pinii SDA si SCL sunt A4, respectiv A5 - pentru comunicatia SPI necesara potentiometrului digital dublu MCP4261-502E/P, pinii sunt SCK=D13(SCK), SDO=D12(MISO), SDI=D11(MOSI) si CS=D10(SS). Ca si pentru versiunea cu Arduino Mega, am pastrat memorarea frecventei si treapta volumului inainte de oprire, sketch-ul fiind MCP4261_lin_to_log_Nokia5110_2m3.ino. Pe ecran, functie de volum, frecventa, nivel semnal pot apare diverse indicatii:
Fata de schemele anterioare de radio cu TEA5767, acum am implementat volum digital, in 16 trecte, dar se pot pune si mai multe sau mai putine...
Schema de conexiuni e un pic complexa, avand in componenta o placa Arduino Mega, un afisaj de Nokia 5110 cu interfata, un modul radio cu TEA5767 si un potentiometru digital dublu MCP4261-502E/P:
Sketch-ul folosit este TEA5767_eeprom_i2c_lcdNokia5110_digitalvolume_3m2.ino si permite controlul volumului din 2 taste fara retinere, cautarea inainte si inapoi, memorarea valorii volumului si a ultimei frecvente. pe ecran, se pot vedea urmatoarele situatii:
Intr-un vechi articol din 2013, am conectat un afisaj de Nokia 5110 la radio FM facut cu TEA5767 si o placa Arduino Uno, de data asta am folosit un Arduino Mega pentru a putea implementa usor si un reglaj de volum..
Schema folosita este:
Fata de ce am prezentat in vechiul articol, care are urmatoarea prezentare grafica pe ecran:
acum arata asa:
iar modul de functionare este similar, doar ca datele sunt stocate in memoria EEPROM a microcontrolerului de pe placa de dezvoltare (se memoreaza frecventa postului ascultat - sketch: TEA5767_eeprom_i2c_lcdNokia5110_3m1a.ino), dupa cum se vede si in cele 2 filmulete:
Am 3 ani am facut niste experimente cu un modul radio FM bazat pe integratul TEA5767, dupa cum se vede in articolele: - Radio FM cu TEA5767 si... Arduino - Radio FM cu TEA5767 si... Arduino (II) Am refacut montajul cu afisaj alfanumeric cu 16 coloane si 2 randuri (LCD1602) cu interfata i2c:
folosind cam aceeasi schema ca in primul articol:
fara a folosi cele 2 rezistente externe de 10k pentru ca le folosesc pe cele interne de la microcontorul placii de dezvoltare si conectand "magistralele"SDA si SCL la pinii dedicati ai placii Arduino Leonardo pe care am folosit-o acum:
De data asta am mai modificat un pic sketch-ul si am memorat ultima frecventa, astfel ca receptorul porneste pe aceeasi frecventa ca cea ascultata cu o zi, o saptamana, o luna inainte, etc.
Fata de partea I, in care am prezentat date generale si am comandat integratul TEA5767 cu placa Arduino si am afisat date pe un LCD cu 16 coloane si 2 randuri, apoi pe unul compatibil Nokia 5110, acum voi conectata si modulul de timp real (RTC) cu integratul DS1307, astfel incat voi avea si informatii despre ora si data.
Dupa ce am modificat un pic sketch-ul anterior pentru a muta informatiile legate de frecventa radio, am urmatoarea prezentare:
Am completat sketch-ul cu partea de RTC, obtinand:
29.iun.2013 Am mai facut un filmulet, numit FM radio with TEA5767 and Arduino (IV) PS: Am conectat si senzorul DHT11 si am informatii despre temperatura si umiditate, dar pare prea "sorcova", asa ca nu am mai "bibilit" la sketch prea mult...
/********************************************************************* This is an example sketch for our Monochrome Nokia 5110 LCD Displays Pick one up today in the adafruit shop! ------> http://www.adafruit.com/products/338 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 */ // Date and time functions using a DS1307 RTC connected via I2C and Wire lib // original sketck from http://learn.adafruit.com/ds1307-real-time-clock-breakout-board-kit/ // add part with SQW=1Hz from http://tronixstuff.wordpress.com/2010/10/20/tutorial-arduino-and-the-i2c-bus/ // adapted sketch by niq_ro from http://nicuflorica.blogspot.ro // version 4.1 for FM radio with TEA5767 - http://www.tehnic.go.ro #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> // from https://github.com/andykarpov/TEA5767 #include <Wire.h> #include <Button.h> // from http://arduino-info.wikispaces.com/file/view/Button.zip/405390486/Button.zip // 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 #include <DHT.h> #define DHTPIN A2 // what pin we're connected DHT11 #define DHTTYPE DHT11 // DHT 11 DHT dht(DHTPIN, DHTTYPE); #include "RTClib.h" RTC_DS1307 RTC; void setup () {
Wire.begin(); Radio.init(); Radio.set_frequency(104.5); Serial.begin(9600); // sensor DHT for humidity and temperature dht.begin(); display.begin(); // init DHT done // you can change the contrast around to adapt the display // for the best viewing! display.setContrast(55); display.clearDisplay(); RTC.begin(); // RTC.adjust(DateTime(__DATE__, __TIME__)); // if you need set clock... just remove // from line above this // part code for flashing LED Wire.beginTransmission(0x68); Wire.write(0x07); // move pointer to SQW address // Wire.write(0x00); // turns the SQW pin off Wire.write(0x10); // sends 0x10 (hex) 00010000 (binary) to control register - turns on square wave at 1Hz // Wire.write(0x13); // sends 0x13 (hex) 00010011 (binary) 32kHz Wire.endTransmission(); if (! RTC.isrunning()) { Serial.println("RTC is NOT running!"); // following line sets the RTC to the date & time this sketch was compiled RTC.adjust(DateTime(__DATE__, __TIME__)); } // Print a logo message to the LCD. display.setTextSize(1); display.setTextColor(BLACK); display.setCursor(8,0); display.println("tehnic.go.ro"); display.setCursor(20, 8); display.print("& niq_ro"); display.setCursor(16, 24); display.print("radio FM"); display.setCursor(5, 32); display.print("si ceas/data"); display.setCursor(0, 40); display.print("versiunea "); display.setTextColor(WHITE, BLACK); display.print("4.1"); display.display(); delay (5000); display.clearDisplay(); } void loop () { DateTime now = RTC.now(); 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); if (current_freq >=100) display.setCursor(0,16); else display.setCursor(12,16); display.print(display.print(current_freq)); // erase 2 number from right for (int x = 16; x < 30; x++) { display.drawLine(60, x, 84, x, WHITE); } display.setTextSize(1); display.setCursor(65,16); display.print("MHz");
display.setCursor(65,24); display.setTextSize(1); display.setTextColor(WHITE, BLACK); if (stereo) display.print("ST"); else display.print(" "); // read value from DHT sensor int h = dht.readHumidity(); int t = dht.readTemperature(); display.setTextColor(BLACK); display.setCursor(6,32); display.setTextSize(1); display.print(h); display.print("%H"); display.setCursor(0,40); display.setTextColor(WHITE, BLACK); display.print("+"); display.print(t); display.print("^C "); 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); // draw an antenna display.drawLine(55, 32, 55, 40, BLACK); display.drawLine(56, 32, 56, 40, BLACK); display.drawLine(52, 32, 55, 36, BLACK); display.drawLine(51, 32, 55, 37, BLACK); display.drawLine(59, 32, 56, 36, BLACK); display.drawLine(60, 32, 56, 37, 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(300); } if (btn_backward.isPressed()) { last_pressed = current_millis; search_mode = 1; search_direction = TEA5767_SEARCH_DIR_DOWN; Radio.search_down(buf); delay(300); } delay(100); // need for display time int zs = now.second()/10; int us = now.second() - zs*10; if (us > 2 ) { display.setTextSize(2); display.setTextColor(BLACK); display.setCursor(0, 0); { if ( now.hour() < 10) { display.print(" "); display.print(now.hour(), DEC); } else { display.print(now.hour(), DEC); } display.setCursor(20, 0); display.print(":"); display.setCursor(28, 0); if ( now.minute() < 10) { display.print("0"); display.print(now.minute(), DEC); } else { display.print(now.minute(), DEC); }
