Novice trying to test T3.6 USB Host

[TelephoneBill]

I would like to test the USB Host feature of my T3.6 board but I have run into trouble. Any assistance would be appreciated.

I'm using the "Mouse.ino" sketch (code below) from "wwatson" found in the zip file at https://forum.pjrc.com/threads/45740-USB-Host-Mouse-Driver (post #3). This compiled and downloaded OK without any added files being included in the IDE (using Arduino 1.8.4 and Teensyduino 1.40). I get the "USB Host Mouse Testing" signon message, but when I move the mouse around I don't get any more serial text printed. Nothing from button presses or scroll wheel. The mouse LED itself is illuminated. Its a Logitech M90. The code is looping - tested with a Serial.println("Hello") and Delay(1000) diagnostic lines added to the loop - but the "mouse1.available()" line appears never to go "true".

My config... I have soldered 4 pins to the USB Host position on the board and connected a USB internal cable - Red pin 1 (5v), White pin2 (D-), Green pin3 (D+), Black pin4 (GND) - pin5 not connected. M90 plugged into USB socket A. I have downloaded the code to the board and measured +5 volts across USB Host pin1/pin4. I have looked at the signals (wrt GND) on pin2 and pin3 and get some strange "one shot" pictures. The D- signal (pin 2) is shown on the left below, and the D+ (pin3) on the right. The D- signal is continuous, but the D+ signal is only seen on reset.

I tried another mouse but got exactly the same result.

// Simple test of USB Host Mouse/Keyboard
//
// This example is in the public domain

#include "USBHost_t36.h"

USBHost myusb;
USBHub hub1(myusb);
USBHub hub2(myusb);
USBHub hub3(myusb);
KeyboardController keyboard1(myusb);
KeyboardController keyboard2(myusb);
MouseController mouse1(myusb);

void setup()
{
	while (!Serial) ; // wait for Arduino Serial Monitor
	Serial.println("USB Host Testing");
	myusb.begin();
	keyboard1.attachPress(OnPress);
	keyboard2.attachPress(OnPress);
}


void loop()
{
  myusb.Task();
  Serial.println("Hello");
  delay(1000);
  if(mouse1.available()) {
    Serial.print("buttons = ");
    Serial.print(mouse1.getButtons(),DEC);
    Serial.print(",  wheel = ");
    Serial.print(mouse1.getWheel(),DEC);
    Serial.print(",  mouseX = ");
    Serial.print(mouse1.getMouseX(),DEC);
    Serial.print(",  mouseY = ");
    Serial.println(mouse1.getMouseY(),DEC);
    mouse1.mouseDataClear();
  }
  delay(50);
}


void OnPress(int key)
{
	Serial.print("key '");
	Serial.print((char)key);
	Serial.print("'  ");
	Serial.println(key);
	//Serial.print("key ");
	//Serial.print((char)keyboard1.getKey());
	//Serial.print("  ");
	//Serial.print((char)keyboard2.getKey());
	//Serial.println();
}

 

[PaulStoffregen]

Don't use that old code. It won't work.

For the latest, click File > Examples > USBHost_t36 > Mouse.

MouseController now uses USBHIDParser, so it won't work unless you have a USBHIDParser.

 

[TelephoneBill]

That's better ... worked first time.

Even the quiescent D- and D+ signals look better (included here in case anyone else wants to check theirs out: D- left, D+ right).



Incidentally, you won't see +5v on pin1 until you download the sketch.

 

[TelephoneBill]

For other novices, I also experimented with just a miniature keyboard attached. The following minimalist code works too... (but may change on future Teensyduino versions)...

//Test of T3.6 USB Host Keyboard (26 OCT 2017)
//============================================
#include "USBHost_t36.h"

USBHost myusb;
KeyboardController keyboard1(myusb);

void setup()
{
  while (!Serial) ; // wait for Arduino Serial Monitor
  Serial.println("USB Host Keyboard Testing");
  myusb.begin();
  keyboard1.attachPress(OnPress);
}

void loop()
{
  myusb.Task();
}

void OnPress(int key)
{
	Serial.print("key '");
	Serial.print((char)key);
	Serial.print("'  ");
	Serial.println(key);
}