pt2258 controller

Community General Discussion
1

byte VUP = 1;
byte VDW = 0;
#include <Wire.h>
#include <LiquidCrystal.h>
#include <EEPROM.h>

char tmp[30];
LiquidCrystal lcd(22,23,18,19,20,21);
unsigned int RC5addr = 0, RC5data = 0;
int8_t tmpdata;

#define pt2258_addr 0x88
#define LOGO "SUSEE ELECTRONICS"
#define VOLUME "VOLUME DB"

#define MAX_VDB (0)
#define MIN_VDB (80)
#define INC_VDB (5)
int vol;
int vdb;
int volume_up = 0;
int volume_down = 0;
int buttonState = 0; // current state of the button
int lastButtonState = 0; // previous state of the button
int button2State = 0; // current state of the button
int lastButton2State = 0;

void setup(){
lcd.begin(16, 2);
lcd.print(" VOLUME ");

Serial.begin(9600);
Serial.println("Hello world!");
CLKPR = (1<<CLKPCE);
CLKPR = 0;

pinMode(VUP,INPUT);
pinMode(VDW,INPUT);
Wire.begin();
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XC0); // sends five bytes

Wire.send(0xD7);
Wire.send(0xE9); // sends one byte
Wire.endTransmission(); // stop transmitting
}
void selectvolume(int vdb) {
switch (vdb){

case 0:

Wire.beginTransmission( pt2258_addr); // transmit to device #4

Wire.send(0xD7);
Wire.send(0xE9); // sends one byte
Wire.endTransmission(); // stop transmitting
lcd.setCursor(0,7);
lcd.print("zero");
break;

case 5:
Wire.beginTransmission( pt2258_addr); // transmit to device #4

Wire.send(0XD7);
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 10:
Wire.beginTransmission( pt2258_addr); // transmit to device #4

Wire.send(0XD6);
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 15:
Wire.beginTransmission( pt2258_addr); // transmit to device #
Wire.send(0XD6);
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 20:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD5);
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 25:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD5);
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 30:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD4);
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 35:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD4);
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 40:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD4);
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 45:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD3);
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 50:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD2);
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 55:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD2); // sends one byte
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 60:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD1); // sends one byte
Wire.send(0XE9);
Wire.endTransmission(); // stop transmitting
break;

case 65:

Wire.beginTransmission( pt2258_addr); // transmit to device #
Wire.send(0XD1); // sends one byte
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
break;

case 70:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD1); // sends one byte
Wire.send(0XE1);
Wire.endTransmission(); // stop transmitting
break;

case 75:
Wire.beginTransmission( pt2258_addr); // transmit to device #4
Wire.send(0XD0); // sends one byte
Wire.send(0XE5);
Wire.endTransmission(); // stop transmitting
lcd.setCursor(0,7);
lcd.print(" max");
break;

}
}

void checkbuttons(){
buttonState = digitalRead(VDW);
button2State = digitalRead(VUP);

if (buttonState != lastButtonState) {

if (buttonState == HIGH) {
vdb += INC_VDB;
vdb = constrain(vdb, 0, 80);

Serial.print("Counter value: ");
Serial.println(vdb, DEC);
selectvolume(vdb);

lcd.setCursor(0,7);
lcd.print(" ");
lcd.setCursor(0,7);
lcd.print(vdb,DEC);

}
else
{

}

lastButtonState = buttonState;
}

if (button2State != lastButton2State) {

if (button2State == HIGH) {

vdb -= INC_VDB;
vdb = constrain(vdb, 0, 80);

tmpdata = vdb ;
selectvolume(vdb);
Serial.print("Counter value: ");
Serial.println(vdb, DEC);

lcd.setCursor(0,7);
lcd.print(" ");
lcd.setCursor(0,7);
lcd.print( vdb,DEC);

}
else
{

}

lastButton2State = button2State;
}

}
void loop (){
checkbuttons();
}

2

PLease modify your post, select the code and press the # button so proper tags are included... Looks so much better..

3

Do you have a Schematic for this setup?
Wouldn't mind building this myself..

Thanks.

4

there is a conflict between comments and code (code always wins)

   Wire.begin(); 
  Wire.beginTransmission( pt2258_addr); // transmit to device #4
  Wire.send(0XC0);        // sends five bytes
  
  Wire.send(0xD7);
  Wire.send(0xE9);  // sends one byte  
  Wire.endTransmission();    // stop transmitting
  }

the comment says 5 bytes or one byte but in fact you are sending 3.

if you divide vdb by 5 your switch statement will get the numbers 0,1,2,3,4,5 .. 25;

Than enables you to refactor the commands in an array commands, something like

byte commands[25][2] = { {D7, E9 }, { , }  .... { , } } // numbers to be filled in

and make a function

sendCommand(byte cmd[2])
{
  Wire.beginTransmission( pt2258_addr);  
  Wire.send(cmd[0]);
  Wire.send(cmd[1]);  // sends one byte  
  Wire.endTransmission();
}

The switch will become simpler

 void selectVolume(int vdb) 
{
  int idx = vdb/5;
  sendCommand( commands[idx] );

  if (vdb == 75)
  {
    lcd.setCursor(0,7);  
    lcd.print(" max");
  }
}