CRC problem in my customize DFU Controller (nrfutil)

RE: CRC problem in my customize DFU Controller (nrfutil)

nta_xyz — Thu, 18 Apr 2019 15:04:24 GMT

I think finally I found the problem!, the problem was when I got the CRC error, I started sending from the beginning of the firmware again!, but I should send data from the last correct offset.

now it is working in all situations.

Thank you for helping me.

RE: CRC problem in my customize DFU Controller (nrfutil)

Vidar Berg — Wed, 17 Apr 2019 11:31:19 GMT

[quote user="nta_xyz"][/quote]

the problem is that after I get CRC error I call NRF_DFU_OBJECT_OP_SELECT and for example it returns this array:

06, 01, 00, 10, 00, 00, c1, 7f, 00, 00, 75, 1d, c3, e5, c0,

This was not the result I expected. When you get the CRC error, do you send NRF_DFU_OP_OBJECT_CREATE() followed by NRF_DFU_OBJECT_OP_SELECT()? Another option may be to simply resend the init packet command, this should let you restart DFU the upload.

RE: CRC problem in my customize DFU Controller (nrfutil)

nta_xyz — Tue, 16 Apr 2019 15:08:11 GMT

Thank you for your answer.

I did this but unfortunately, it is not working.

when I get CRC error, I execute NRF_DFU_OP_OBJECT_CREATE() function but it is still not working.

the problem is that after I get CRC error I call NRF_DFU_OBJECT_OP_SELECT and for example it returns this array:

06, 01, 00, 10, 00, 00, c1, 7f, 00, 00, 75, 1d, c3, e5, c0,

but it should be:

06, 01, 00, 10, 00, 00, 00, 70, 00, 00, 47, 91, 6c, b0, c0,

the CRC of the 0x00007fC1 is not correct but for 0x00007000 is correct.

when I reset the target manually it is working and I get the second array which is the correct answer.

RE: CRC problem in my customize DFU Controller (nrfutil)

Vidar Berg — Tue, 16 Apr 2019 12:07:50 GMT

Hi,

It should be sufficient to issue a new NRF_DFU_OP_OBJECT_CREATE() request. According to the documentation, this will reset the progress since the last Execute command.

Best regards,

Vidar