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9 years, 4 months ago.
FRDM-K20D50M connected first time, bootloader download seems not to work
Hello,
I tried to make a FRDM-K20D50M board available for mbed but it didn't work. I proceeded as described here: https://developer.mbed.org/handbook/Firmware-FRDM-K20D50M
I logged in and downloaded k20dx128_k20d50_if_opensda.s19 (save target as...), it is 95.3kB long. Suggestion: Please mention that logging in is necessary to see the corresponding link.
I opened the board in Bootloader mode and copied the file onto it (drag'ndrop), and it obviously was stored there. This was the very first time the board was powered after I have received it. After power cycling the board "appeared dead": No lights were blinking any more and the board was not visible as storage device.
I once more opened the board in Bootloader mode, thought having done something wrong. The device appeared as "Bootloader" storage device, the other files were still there but the k20dx128_k20d50_if_opensda.s19 had disappeared. I once more copied it and power cycled the board, but the same happened (nothing visible happened) as before.
Have I damaged the board? What can I do next?
Thank you in advance, Helmut
P.S.: The board looks VERY interesting (powerful MCU, large flash) and I do not want to loose it.
1 Answer
9 years, 4 months ago.
Hello,
I have seen the same behavoir trying to update a board from a Windows 8.1 PC. After that I used a Windows 7 machine and it worked fine. So I think you don't have damaged your board, it seems to be a USB related problem.