Instant Interrupts - Revisited


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  1. #11
    Join Date
    Mar 2010
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    If I don't have the TRISB config the bootloader never enters the user program mode.

    I added the TRISB = %1111110 and it enters the user program but still shows an undetected USB device after a few seconds and the LED on PORTB.0 is still not blinking.

    One more piece of info, I am getting power from the USB port on my laptop. Even though the user program is not using USB I am "stealing" power for this test setup from the USB port. i.e. I download the program to the bootloader through the PIC USB and leave the cable connected to power the board for testing.

    It doesn't look like anything in the DT_INTS would be triggered from activity on the USB port since I have not explicitly configured the USB_INT. The PIC is certainly seeing a request from the PC since its connected to the PIC circuitry and that could be why I get the USB device not recognized...although I don't get that when i am running just the Blink program using PAUSE 500 statements.

    When I get home later tonight I will load this program directly on the PIC through the ICSP without the bootloader to verify my setup is happy. Then I will try the bootloader again and use an external power supply instead of the USB power.

    ADDED: I have reconfigured the Bootloader to use PORT B.1 instead of Diolan's default of PortE.0. My end application will use Port B.1 so I built this test board assuming portb.1 would work.
    Last edited by vamtbrider; - 25th March 2010 at 21:53. Reason: Added Bootloader Jumper Information

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