MCU BootloaderのトピックRe: Write a FlashLoader

Write a FlashLoader

Devyy — Thu, 24 Aug 2023 09:35:38 GMT

Hello everyone,

I'm a beginner in embedded system programmation and I want to create my own flash loader to download and write a programme using UART. I'm using a kinetis mkv58f1m0vlq24.

I dont want to use any libraries function like "flash_memory_write". I'm just trying to improve my skills.

My question is what are the steps to achieve to write in flash memory ?

I read datasheets and it seems to have a flash security but when i'm watching my registers, the security seems to not be active.

What I understood is that before every write in memory, i have to erase the memory area.

Thank you in advance for your answers,

Devyy

Re: Write a FlashLoader

ErichStyger — Thu, 24 Aug 2023 12:50:34 GMT

Hi @Devyy ,

you might have a look at https://mcuoneclipse.com/2013/04/28/serial-bootloader-for-the-freedom-board-with-processor-expert/

Basically, you need

a) implement the UART/serial driver

b) define a data protocol and parser (e.g. reading S19 files)

c) program the flash memory. Have a look at the SDK for the flash drivers

d) do all the controlling around: reset handling, reset vector, vector table

good luck!

Re: Write a FlashLoader

Devyy — Fri, 25 Aug 2023 08:26:18 GMT

Hi !

I have read what you sent. It will help me for sure.
Thank you so much !