topic Re: the problem of kboot connect kinetis flash tool by uart in MCU Bootloader

the problem of kboot connect kinetis flash tool by uart

676638449 — Wed, 12 Sep 2018 03:33:44 GMT

i ported kboot to my board ,but when i use flash tool to connect my board is wrong. the first the flash tool continuous send 0x5a 0xa6, when i bootloader response 0x5a 0xa7 0x00 0x02 0x01 0x50 0x00 0x00 0xaa 0xea.but the flash tool still continuous send 0x5a 0xa6 .i don't know happen this situation .i hope someone can help me to solve the problem.

Re: the problem of kboot connect kinetis flash tool by uart

victorjimenez — Thu, 13 Sep 2018 18:05:30 GMT

Hello,

I recommend you to check the Kinetis Bootloader reference manual. Specially chapter 6 section 6.4, chapter 3 and chapter 4, to see if your are missing something.

Since you are using a custom board you should check your schematic also to see that the connections are fine.

Hope it helps!

Victor.

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Re: the problem of kboot connect kinetis flash tool by uart

676638449 — Tue, 18 Sep 2018 03:50:13 GMT

thank you ,problem was solved.

but i have a new problem,in the struct bootloaderContext ,it has a member of flash_driver_inetrface_t,but i don't find it's instance.what i should i do?

Re: the problem of kboot connect kinetis flash tool by uart

victorjimenez — Wed, 19 Sep 2018 13:18:34 GMT

Hello,

Please refer the section 8.2 of the reference manual attached in my last response.

Regards,

Victor.

Re: the problem of kboot connect kinetis flash tool by uart

676638449 — Wed, 19 Sep 2018 14:14:26 GMT

sorry ,maybe i said what is not clear, in fact ,i want to know low -level flash driver:

now i'm porting kboot to one it is not from kinetis,so should i creat new low-level flash driver for it .or maybether sre other easy and simply methods. i find flash driver fsl_flash in NXP_Kinetis_Bootloader_2_0_0\src\drivers ,but they can't be used for my mcu .

Re: the problem of kboot connect kinetis flash tool by uart

victorjimenez — Wed, 19 Sep 2018 20:43:24 GMT

Hello,

Which MCU are you trying to use? It's not recommended to migrate kboot to other MCU that is not from the Kinetis family. In the application layer maybe everything can remain the same, but at a lower level you need to change everything according to the MCU you want to use.

Regards,

Victor.

Re: the problem of kboot connect kinetis flash tool by uart

676638449 — Thu, 20 Sep 2018 03:59:46 GMT

hello,

My work is to migrate kboot for many other MCUs not from the kinetis family .so i hope you can give some advice to help me finish this work.

Re: the problem of kboot connect kinetis flash tool by uart

victorjimenez — Fri, 21 Sep 2018 19:06:59 GMT

Hello,

Since kboot was made for Kinetis family devices only. If you want to migrate kboot to other MCUs you will need to modify the physical layer depending on the MCU that you want to use. So, you will need to read the reference manual of each MCU to see how you need to modify the physical layer.

Regards,

Victor.

Re: the problem of kboot connect kinetis flash tool by uart

676638449 — Tue, 25 Sep 2018 01:54:16 GMT

ok, thank you very much.

Re: the problem of kboot connect kinetis flash tool by uart

676638449 — Wed, 26 Sep 2018 12:02:55 GMT

hello Victor

I meet a problem about source code. This code is in line 227 of property.c. I don't understand why the start and end addresses of the reserved area are the start and end addresses of flash. When I want to erase a certain sector of flash, mem_is_block_reserved() is called. , but this function will return true, then mem_erase() returns kstatusMemoryRangeInvalid. I hope you can answer my doubts.

Re: the problem of kboot connect kinetis flash tool by uart

victorjimenez — Wed, 17 Oct 2018 20:02:04 GMT

Hello,

Sorry for my late response.

Kboot only reserves the flash memory that is needed to store the bootloader, it doesn't reserve all the Flash. Keep in mind that if you want to erase a sector of flash then you cannot be running that command from the flash memory.

Regards,

Victor.