Dead Teensy 2.0 & 2.0++

[soward]

I was working on a fairly simple bit of code using RawHID via Arduino on a 2.0. I pushed it down, the various LEDs lit, etc. I started the usb code on the desktop side. couldn't connect. went back to the code, put in some Serial.Printlns, tried to build -- teensy loader couldn't find the device. Tried the 'hold-the-button-down-while-plugging-in' trick, as well as other ports and machines. USB Prober sees nothing. Oh, well, maybe it caught a spark or something.

Grabbed a 2.0++, rejiggered the simple connections and the Pin #s in the code. Compiled and pushed it down -- same thing, device is no longer communicating.

Did I whack the halfkay somehow? Did the cat jump up and rub across both of them when I wasn't looking?

I ordered a few more, but obviously don't want the same thing to happen.

T3 still works, of course, no RawHID in Arduino for it

I can post the code if anyone thinks that's actually the issue.

Also, FWIW, I built the little bits of code for the buttons/leds first and all was well, then I tried some basic RawHID tests, which also worked well, this was essentially just the grafting together of the two.

thanx,
JpS

[soward]

Below is the code I was using. As for the wiring, two LEDs from pins 4 and 5 to ground with a small resist on each. a voltage divider resist coming off 5v to a push button switch and going back to 19 and 20. (different pins on 2.0 and ++2.0).

Obviously parts were cut-n-pasted from the RawHID example.

#define ACK 0x10
#define B1  0x20
#define B2  0x30
#define BER 0x40

#define B1Pin 19
#define B2Pin 20

#define LED1 4
#define LED2 5

void setup() {
  Serial.begin(9600);
  Serial.println("RawHID Example");
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(B1Pin, INPUT);
  pinMode(B2Pin, INPUT);
}


// RawHID packets are always 64 bytes
//elapsedMillis msUntilNextSend;
int tripped = 0;
int blink = 0;
byte buffer[64];
int n;

void loop() {
  int n;
  n = RawHID.recv(buffer, 0); // 0 timeout = do not wait
  if (n > 0) {
    // the computer sent a message.  
    // See what the command is....
    Serial.print(F("Received packet, first byte: "));
    Serial.println((int)buffer[0]);
    switch((int)buffer[0]) {
       case 0x10: // clear both LEDS
                  Serial.println("Clearing");
                  digitalWrite(LED1,0);
                  digitalWrite(LED2,0);
                  tripped = 0;
                  break;
       case 0x20: // blink both LEDS
                  Serial.println("Blinking");
                  break;
       case 0x30: // swap LEDS
                  Serial.println("Swap");
                  if (tripped == 1) {
                    tripped = 2;
                    digitalWrite(LED1,0);
                    digitalWrite(LED2,255);
                  }
                  if (tripped == 2) {
                     tripped = 1;
                    digitalWrite(LED2,0);
                    digitalWrite(LED1,255);
                  }
                  break;
       default:
                 Serial.println("UNKNOWN COMMAND!");
                 break;
    }
    sendPacket(ACK);
  }
  if (!tripped && (digitalRead(B1Pin) == HIGH)) {
    tripped=1;
    sendPacket(B1);
    digitalWrite(LED1,255);
   }
   if (!tripped && (digitalRead(B2Pin) == HIGH)) {
    tripped=2;
    sendPacket(B2);
    digitalWrite(LED2,255);
   }
}

void sendPacket(int command) {

    byte buffer[64];

    // first 2 bytes are a signature
    buffer[0] = 0xAB;
    buffer[1] = 0xCD;
    
    buffer[2] = command;
    // fill the rest with zeros
    for (int i=3; i<64; i++) {
      buffer[i] = 0;
    }
    // actually send the packet
    n = RawHID.send(buffer, 100);
    if (n > 0) {
      Serial.println(F("Transmitted packet"));
    } else {
      Serial.println(F("Unable to transmit packet"));
    }
  }