Problems with HEX and DAT file

[Amund Glomsås]

I have built a application with IAR, and made a hex file with Intel extended. It’s works fine with nRFgo Studio. But I got problems with dfu updating from my android. I hope the problems are the DAT-file. When I put the app-hexfile trough hex2bin and then crc, I get 0xFD66. So my dat file then looks like this. Is this right?

ffff ffff ffff ffff 0200 4f00 5a00 66df

[oceanide]

The following site will be helpful. github.com/.../nRF51DfuInitPacket

[Matt Barr]

Hi Amund, try: ffff ffff ffff ffff 0200 4f00 5a00 66fd vs. 66df.

Reverse just the two CRC bytes, not the nibbles!

[Hung Bui]

Hi Amund,

[EDITED] I agree with MattBarr , you need only to switch the byte, so it should be 66FD. Which problem did you have when doing DFU? Could you upload here a hex file sample so that we can try and test here ? I am suspecting there could be an issue with the hex file generated by IAR. Please mention the S110 version that you used with the hex

[Amund Glomsås]

Changing the dat-file doesn’t help. Thanks Oceanide, this link would make it easier with later releases. The S110 release that I'm using is 7.0.0, and I get IC revision 2 of 51822 The DFU bootloader is built from nRF51_SDK_7.1.0_372d17a with dfu_single_bank I tested the bootloader with the ble_app_hrs_dfu_s110_v7_1_0 who comes default with nRF Master Control Panel, and this is downloaded, and I can inspect it in flash on my unit. But when I try my own built app, the flash is empty. And I get Remote DFU error: REMOTE DFU NOT SUPPORTED. I have added the hex, dat and the Master Control Panel log. The hex file is Intel extended, IAR. I hope this is not an IAR problem. Any suggestion?

LinkLoad.hex application.dat log.pdf

Solved this with what I get from colton and Matt Barr,Thanks.

[Matt Barr]

Hi Amund, I'm not completely clear on which tool chain you've used to build which components, but DFU did not work for me when trying to use a bootloader built with the Keil tool chain and a DFU-capable application built with the IAR tool chain. DFU works for me when both are built with Keil, or both are built with IAR. I'm using the 7.2.0 SDK, dual bank bootloader, and 7.1.0 S110 (2.0.1 S310).