DFU CRC error

[dblasco]

Hi,

there are similar questions to this but I cannot solve my problem. I am trying to upload a new code using DFU by means of a smartphone (using nRF Connect) or PC (using Master Control Panel), without success. The code uploads correctly till 100% but then at the very end it gives me CRC error.

The very first time I upload a new code with DFU (after programming everything with a programmer of course) this does not happen, but if I try to do this more times (except if I upload the exact same code) this error happens.

I am using nrf51822, SDK 11, s130 (v2.0.1). The code is a modification of the ble_app_hrs_rscsc_relay code. The bootloader I use is also a modification of the bootloader dual_bank_ble_s130.

The modifications are done in a way that the main application writes in memory (using pstorage.h) a byte that the bootloader can read to go into DFU mode (therefore the bootloader includes pstorage.h as well).

The .zip package is correctly generated (I asked this in a past question and it seemed ok).

Could someone help me?

Thank you very much

[dblasco]

Not exactly.

1. I flash softdevice, bootloader AND firmware 1 and go DFU
2. I upload firmware 1 (or firmware 2) and it works
3. I DFU the firmware, it works
4. I upload firmware 1, it works (if previous was firmware 1 as well, if not it fails) OR I upload firmware 2, it fails (and from now on it will fail for all firmwares)

Both firmwares are equal except for a byte in the advertising packet (so I can know it is correctly updated). The results are the same changing the order of firmware 1 and 2.