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LPC2362 Not entering ISP mode

Jai A

Hi All,

I have a strange problem with my board LPC2362. The fresh controller is getting programmed for the very first time. And the second time onwards the controller is not entering into ISP mode.

I am using Flash magic for programming. RTS and CTS are included in the ISP connections and using via PC serial port.

I have probed the Reset pin and EINT(P2.10). Both are going LOW initially and then HIGH when trying to connect from flash magic, though not connecting on second attempt. The error I get is Failed to Autobaud.

First time after changing the controller, it works fine. So the ISP circuit is fine I guess.

Any valuable suggessions would be highly appriciated.

Thanks

Parents
  • 0

    Are you erasing all the flash blocks while programming using ISP? (Check the configurations of Flash Magic to determine this.)
    Its likely that you are erasing the Bootloader code also.
    check box "Erase blocks used by Hex File" must be checked (ie enabled)

Reply
  • 0

    Are you erasing all the flash blocks while programming using ISP? (Check the configurations of Flash Magic to determine this.)
    Its likely that you are erasing the Bootloader code also.
    check box "Erase blocks used by Hex File" must be checked (ie enabled)

Children
  • 0 in reply to Ash J

    Thanks,

    I think you are right. I will try this. I would have erased the boot loader on 1st attempt. Does it mean we have to replace the controller again? Or by just enabling this it will work?

  • 0 in reply to Jai A

    You can use the same controller but you will have to reload the bootloader code. Check the nxp site for bootloader file.

  • 0 in reply to Ash J

    Hi, Thanks for your reply.

    ISP is not working in order to load the bootloader code also. The error is "Failed to autobaud" after the first flashing. In first flashing I checked the Erase all Flash option and programmed.
    In my knowledge, ISP code protect is enabled by default in Flash magic. So ISP should work (should be able to program multiple time)even if I erase all flash. Am I right? Where could be the issue?

  • 0 in reply to Jai A

    Flash magic manual can be accessed from 'Help' menu.

    Try performing a blank check and reading device ID (the steps are described in the manual.

  • 0 in reply to Being Human

    Hi,

    The problem has been solved.

    I am able to reprogram multiple times now. I removed crystal from the board. If I have the crytal on board the problem persits. And I added 0.1uF cap in reset circuit. (Earlier I had 33K with 0.1uF for reset).This modifications solved my issue but still having problem in executing my program. I am just toggling the I/O pins which is not happening. Any idea why is it not executing?