Thread: Interest check: Camry/Scion Steering Wheel Control -> USB

Here is my code for running a Toyota with an Arduino
http://www.arduino.cc

Code:

//calibrated voltage ranges for FJ cruiser with 3.3K ohm resistor inline
//used +/- 20 steps to account for voltage fluctuations
#define MODEMIN     0
#define MODEMAX    20
#define VOLDNMIN  475
#define VOLDNMAX  515
#define VOLUPMIN  215
#define VOLUPMAX  255
#define SEEKDNMIN  70
#define SEEKDNMAX 110
#define SEEKUPMIN   0
#define SEEKUPMAX  20

//use this same enum in software to read key values back out
#define KEY_NONE    0
#define KEY_MODE    1
#define KEY_VOLDN   2
#define KEY_VOLUP   4
#define KEY_SEEKDN  8
#define KEY_SEEKUP 16
#define KEY_ALL    31

int inputMode = 0; //analog inputs on physical board for mode button
int inputVolSeek = 1; //combined inputs for volume and seek buttons

int mode = 0;
int volseek = 0;
int lastkeycode = KEY_NONE;
int keycode = KEY_NONE;

void setup()
{
  Serial.begin(57600); // initialize serial communication with computer
}

void loop()
{
  mode = analogRead(inputMode); // read from the sensor
  volseek = analogRead(inputVolSeek);
  
  keycode = KEY_NONE; //reset keycode to nothing

  //binary OR any values found into single keycode output
  if (mode >= MODEMIN && mode <= MODEMAX) {
    keycode |= KEY_MODE;
  }
  if (volseek >= VOLDNMIN && volseek <= VOLDNMAX) {
    keycode |= KEY_VOLDN;
  }
  if (volseek >= VOLUPMIN && volseek <= VOLUPMAX) {
    keycode |= KEY_VOLUP;
  }
  if (volseek >= SEEKDNMIN && volseek <= SEEKDNMAX) {
    keycode |= KEY_SEEKDN;
  }
  if (volseek >= SEEKUPMIN && volseek <= SEEKUPMAX) {
    keycode |= KEY_SEEKUP;
  }
  
  //reduce amount of traffic, and keep events to a minimum
  if (keycode != lastkeycode) {
    Serial.println(keycode);
  }
  
  lastkeycode = keycode;
}

I built a voltage comparator for mine and interfaced it to a usb joystick. Works a treat!

Blues: Hmmm the Teensy USB development board is a neat idea. I might tinker with one of those some time. I've grown accustomed to the idea of not being able to use my steering wheel controls but I'd still like to be able to use them

So it that all that is required to run it? The board and some pull-up resistors?

Originally Posted by MeeM

So it that all that is required to run it? The board and some pull-up resistors?

That's all the hardware you need yes. But of course you also need to program the microcontroller too.

I used an Arduino ATmega168 to decode my steering wheels inputs too. However it communicates through a serial port and not HID. I really want a HID interface and want it today so I purchased a "CarPC JoyCon" on ebay. I'll let ya know how that works out.





$32+$5 shipping.
http://cgi.ebay.com/ws/eBayISAPI.dll...m=220408430316

This thread has been very informal read.

Originally Posted by BlackStealth

This thread has been very informal read.

Me too, I read it in my underwear

Originally Posted by BlackStealth

I really want a HID interface and want it today so I purchased a "CarPC JoyCon" on ebay. I'll let ya know how that works out.

CarPC JoyCon website: http://www.rcjoycon.com/base_3//menu...om_board_idx=9

woooow. the famous no2chem right here glad to have you aboard(even if thread has been around for a while)

so is there an ETA for a finished purchasable item?