topic KEAZ128 write flash issue in Kinetis Microcontrollers

KEAZ128 write flash issue

jason_zhang — Wed, 09 Mar 2016 06:58:33 GMT

Hi,

I am using the PE function below to write flash for bootloader .

LDD_TError FLASH1_Write(LDD_TDeviceData *DeviceDataPtr, LDD_TData *FromPtr, LDD_FLASH_TAddress ToAddress, LDD_FLASH_TDataSize Size)

It works well until the start address is 0x5860. But it can't work well when write the data to start address which is 0x586C.

It can work well if I changed start address from 0x586C to 0x5870 (the data also be rearranged).

S11358400000000000000000000000000000000054

S11358500000000000000000000000000000000044

S10F586000000000000000000000000038

S113586C586C6C58000000F0FF1F000000000000000056

My question:

1. Can function FLASH1_Write work in the CAN Interrupt event?

2. Is there any limit for FLASH1_Write's param LDD_FLASH_TAddress ToAddress ？

3. Any advice...

Thank you!

Jason

Original Attachment has been moved to: KEA128_APP_3.s19.zip

Re: KEAZ128 write flash issue

jason_zhang — Thu, 10 Mar 2016 03:34:41 GMT

The issue has been solved.

All user state is erased when the bootloader start.

PC GUI sends the CAN Data with consistent 8 bytes longth,

even though the S19 is not long enough,full with 0x00.

That is the reason why I can't write flash 0x586C,

0x586C - 0x586F flash has been written with 0x00.

From the datasheet below,is not allowed.

Datasheet

---------------------------------------------------------------------------------------

CAUTION

A flash byte or longword must be in the erased state before

being programmed. Cumulative programming of bits within a

flash byte or longword is not allowed.

---------------------------------------------------------------------------------------

Thank you!

Jason

Re: KEAZ128 write flash issue

jeremyzhou — Thu, 10 Mar 2016 08:39:11 GMT

Hi Janson,

Thanks for your sharing.

I think the other bootloader developers also may encounter this kind of mistake.
Have a great day,
Ping

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