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USB Bootloader on MCF51JM128 Upgrade Problem

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USB Bootloader on MCF51JM128 Upgrade Problem

‎04-12-2010 05:27 AM
1,760 Views
tiger4
Contributor I

Hi,

I am working on a project that uses the MCF51JM128. I am trying to make the USB bootloader (AN3748) to work on the MCF51JM128. Following the examples given in the application notes, I implement the USB bootloader into my firmware and can JTAG the firmware in. The board is tested to be working correctly and able to be detected as Freescal JM128 bootloader when in USB bootloader mode. However, after flashing in the firmware (S19 format), the board does not work. The firmware is modified from the one provided with the JM Badge Demo Board.

Really appreciate any help and advice. Thanks

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‎04-21-2010 10:23 AM
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tiger4
Contributor I

I have found out that the problem does not lies with my firmware or the USB bootloader. It is the supplied flashing application that comes with the AN3748 USB BootLoader for MCF51JM128 application notes. The application only allow programming of the flash memory up to 32k bytes only, even though there are 128k bytes in the flash memory. Can Freescale look into this?

 

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