About the S132 SDK 17.0.2 DFU

[Chienheng]

I've been develop the other MCU;s DFU driver for the nrf52832 recently, and I ran into several problems.

The first I show you my DFU step in the RTL8720( Be the central to update the peripheral (NRF52832) ), which I

referenced the IOS DFU Library, Android DFU Library and the nRF5 SDK Doc.

test condition:

• SD:                                     S132
• Peripheral:                          nRF52832-QFAA 
• Central:                               RTL8720DN
• Firmware generator:           nrfutil
• Each data obj:                    4KB
• Each frame sent size:         20 bytes
• Notify receipt num:              220

Put aside the errors in transmission, ignore the repetitive firmware:

1. set notify receipt
2. create data object
   
3. send block
   
4. wait notify
   
5. send block
6. repeat until all data was sent
7. cal crc32
8. excute

When I was sent the first block, I recieved the nofity: 0x60 0x03 0x03.

Which steps I was wrong, please advise.

Thank you!

[Vidar Berg]

Hello,

When I was sent the first block, I recieved the nofity: 0x60 0x03 0x03.

The value 0x60 means this notification is a response to a request, where the following byte, 0x3 (NRF_DFU_OP_CRC_GET), is the request was in response to.   And the final byte is the is the response code (NRF_DFU_RES_CODE_INVALID_PARAMETER).

But I don't understand why the bootloader would return this error for the CRC request. What happens if you set the packet receipt notification to '0', do you get the same error?

Best regards,

Vidar

[Chienheng]

Thanks you answer! I changed the code.

Now I can continue the next step.

but when I ran to the last step (cmd: Excute, all the data was sent, offset and crc are correct),

I recieved the 0x60 0x04 0x0b 0x0c, what does it mean?

[Vidar Berg]

The received image is apparently failing the hash validation check. Here is the error you getting:

NRF_DFU_EXT_ERROR_VERIFICATION_FAILED

The hash of the received firmware image does not match the hash in the init packet.

Link: nrf_dfu_ext_error_code_t

You can you read out the flash on the device to see how much the uploaded image differs from the correct image?