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1. 

   PsyKo
   Member

   Hello,

   I'm having a Maple r5 board and tried to use it.
   I did follow the installation guide and manage to install the digital blink example from the IDE. It turned out it didn't work. The board turns off after few (2 or 3) seconds.
   I modified it to have en empty loop, but couldn't upload it (no serial port seen when the USB wire was plugged). So I removed the Serial driver, and try to reinstall it. But never succeeded. My board is now in perpetual boot mode, and as soon as I try to switch to normal mode, the board turns off after few seconds (because user code generates assert I guess): this is not enough for Windows to install the drivers.

   So now I'm stuck in perpetual boot mode, with my USB wire plugged, but no serial port available. What can I do to solve the issue ?
   Do I have to flash my board ?

   Thanks for your help,
   Psyk'

   Posted 4 years ago #
2. 

   poslathian
   LeafLabs

   PsyKo,
   I apologize that you were having problems. The good news is, since you are running perpetual bootloader mode (seeing the blinks) then your board is electrically functional. Further, neither the LED turning off nor the lack of serial port would indicate an assert or hard fault ( a hard fault/assert will cause the LED to fade, not blink, in and out rapidly ).

   The Serial Port will NOT appear in bootloader mode, as program code is NOT uploaded over serial. It is uploaded over a different USB protocol known as DFU. The IDE knows this, and if you try and upload a sketch while in perpetual bootloader mode, the IDE will simply report "no serial port found ... trying anyway over DFU"

   It may have been that you had the wrong board selected from the tools->boards menu, can you verify that you had Maple r5 selected?

   try this code - if the led stays lit, then it means your code was uploaded succesfully. Remember, the serial port will not appear until Maple is running user code successfully.

   `
   void setup() {
   pinMode(BOARD_LED_PIN,OUTPUT);
   digitalWrite(BOARD_LED_PIN,HIGH);
   }

   void loop() {
   }

   Posted 4 years ago #

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