How to send .bin file in custom bootloader?

RE: How to send .bin file in custom bootloader?

AlexVrubel — Wed, 17 Jan 2024 15:15:09 GMT

The initial problem was with displaying the data. Next, write data to a flash drive. Everything works and answering my original question - you need to transfer the raw application bin file. Thanks

RE: How to send .bin file in custom bootloader?

Hung Bui — Thu, 11 Jan 2024 08:46:25 GMT

Hi Alex,

I'm taking over the ticket as I was the one who made the SPI master demo code.

My suggestion is to try DFU a very simple app as small as possible (blink an LED for example) so that the size of the app is as small as possible. I assume you can get to an image with a few kB.

What you can do is to get to understand the protocol is to spy the communication on a successful DFU update. If you use my example as-is can you do a DFU update ? If it doesn't work out of the box, you can also use nrfutil application to do DFU according to the DFU documentation and the nRFutil documentation: https://infocenter.nordicsemi.com/topic/ug_nrfutil/UG/nrfutil/nrfutil_dfu_ble_serial.html?cp=11_8_4

The DFU protocol is described here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/lib_dfu_transport_serial.html?cp=9_1_3_5_2_3

You can start with UART and after you are familiar with UART you can switch to SPI.

RE: How to send .bin file in custom bootloader?

AlexVrubel — Tue, 09 Jan 2024 15:46:46 GMT

Hello, thanks for reply.

Already done this steps, prefer handlers and etc. So I have to send raw .bin file or should make some preprocess of it?

Now the sequence is as follows:

0601            // NRF_DFU_OP_OBJECT_SELECT
01018D000000    // NRF_DFU_OP_OBJECT_CREATE - 141 bytes len of .dat file for validation
020000          // NRF_DFU_OP_RECEIPT_NOTIF_SET - ??? from ble_dfu example
0840080110341a0281..... // NRF_DFU_OP_OBJECT_WRITE - write 141 bytes of .dat file
03              // NRF_DFU_OP_CRC_GET
04              // NRF_DFU_OP_OBJECT_EXECUTE

Apps validates. Then I send:

020C00          // NRF_DFU_OP_RECEIPT_NOTIF_SET
0602            // NRF_DFU_OP_OBJECT_SELECT
0102001000000   // NRF_DFU_OP_OBJECT_CREATE - create 4096 (one page) object

And then I try to understand how exactly I should parse and send .bin file of application? Should I encrypt it or add crc or something else? Should be something like in SPIS example:

083a30323030303030.... // My app begins with 3a 30 32 30 30 30 30 30

RE: How to send .bin file in custom bootloader?

Amanda Hsieh — Tue, 09 Jan 2024 14:09:47 GMT

Hi,

Please refer to the documentation for SPI DFU Master: DFU_SPI_readme.docx.

Regards,
Amanda H.