Replace the firmware file inside the drive “CRP DISABLD”.
I unmount the device peacefully and remount it.
The device keeping pop up “CRP DISABLD”, never return to DAP mbed mode.
Don’t know what happened.
I need more information about how to fix it.
Thanks!
when it appears as CRP_DISABLD, is there a firmware.bin file in the drive?
I suggest trying to update the firmware again by deleting the firmware.bin file then copying the firmware into the drive.
Yes, the CRP_DISABLD drive always contains firmware.bin file. Even I changed the file into DAP_FW_Ameba_V12_1_3-2M.bin, when I replug the cable, the file back to the original filename firmware.bin.
Is it possible that the button next to usb CON2 is damaged? If the button is stuck in a pressed state, it would cause the chip to enter CRP_DISABLD mode every time USB is connected.
Hi @wyy
I’ve check the button J24 next to CON2 and there is no problem on it.
I’ve tried files you provided. No matter what file I put in, the CRP_DISABLD drive always back to firmware.bin (65.5k) after I re-plug it.
Can you provide more info on how you checked button J24?
There is a method to verify that the firmware is updating correctly:
After copying in the firmware and reconnecting, copy the firmware.bin file out, and do a binary comparison with the original file copied in. The binary data should match.
If you updated with DAP_FW_MBED_RTL8195AM_V1.bin, the binary data of firmware.bin should be the same as the original file.
If you updated with DAP_FW_Ameba_V12_1_3-2M.bin, the initial 32KB binary data of firmware.bin should be the same as the original file, with extra space filled in with 0xFF.
renaming the file to firmware.bin is not necessary. I have never done it, but I am not sure if it has any detrimental effects.
instead of unmounting and disconnecting the drive, you can also choose to leave it connected, and press the button next to USB CON1 to reset the DAP chip.
After I tried different ways , finally I discovered that the only way can successfully upgrade firmware is under windows 10 environment, the Linux can not work at all.
I’ve compared the firmware.bin with the source, they are the same ( a lot of 0xFF padding at the end as expected )
I found there is a new behavior of new version DAP_FW_Ameba_V12_1_3-2M, that is the orange and red led flash sequentially and constantly.
I just need to know what this kind of behavior indicates? Is it normal?