1 Reply Latest reply on Oct 27, 2015 4:02 AM by JoMe_264151

    PSoC3 I2C Bootloader failing to program component.

      I'm working on setting up a very simple I2C bootloader for a CY8C3846-AXE176.  I've attached the archive for the bootloader itself.  The bootloadable project is proprietary, but I've added a bootloadable component to it, and have successfully linked it the bootloader HEX file.


      There are some examples of bootloaders, bootloadables, and bootloader hosts that I've looked through, and I can't see any difference between those and what I've set up.  However, I have gotten nothing out of the Bootloader Host other than


      "Communication port reported error 'Unable to write data to the target device'."  


      I've tried bootloading immediately after a power cycle, externally powering the system, all I2C speeds, calling CySoftwareReset manually, starting the I2C component before the reset, and have gotten the same result every time.


      I have a few things left to try.


      1.)  Looks like the Bootloader_Start function handles the software reset as well as the bootloader entry, so I don't believe that's a problem.


      2.)  The PSoC's I2C pins are on an I2C bus with pullups on this system due to a hardware oopsie in the programming header, hence this roundabout bootloader approach.  I know the MiniProg3 has pullup resistors inside, so tomorrow my first action will be to remove those two pullup resistors  so only one set of pullups is affecting it.  Can I turn off the MiniProg's internal pullups?


      I'm willing to answer any questions, and possibly doctor up the bootloadable application to make it uploadable.  Thanks in advance for any help.