Kinetis Software Development KitのトピックRe: KSDK2.1 FLASH_xxxxOnce and DMA

KSDK2.1 FLASH_xxxxOnce and DMA

manfredschnell — Fri, 20 Jan 2017 11:54:26 GMT

Hello,

we use KSDK2.1 with K64 and IAR Workbench.

In our Software we use the functions FLASH_ProgramOnce() and FLASH_ReadOnce() to store and read the MAC and serial number of our device.

The software uses several DMA Services (ADC, I2S, 2x SPI).

When I call one of the functions FLASH_ProgramOnce() or FLASH_ReadOnce() while a DMA access to Memory is active, my System stops at 0xfffffffe <unknown handler>.

It seems to conflict reading from one-time Memory with Software while using DMA with Flash-Memory at the same time.

Can someone tell me something about that correlation?

How can I avoid this situation?

Best regards

Manfred

Re: KSDK2.1 FLASH_xxxxOnce and DMA

xiangjun_rong — Mon, 06 Feb 2017 07:16:33 GMT

Hi, Manfred,

Frankly speaking, I never experience such issue.

As a workaround, can you write the data to the program flash instead of IFR?

Xiangjun Rong

Re: KSDK2.1 FLASH_xxxxOnce and DMA

manfredschnell — Mon, 06 Feb 2017 09:30:49 GMT

Hi Xiangjun Rong,

thank you for your answer.

I use a workaround with RAM buffer:

In my application I read MAC and Serial number at startup from one-time-Memory and store the values in a RAM buffer.

Then my application reads the values from RAM.

I try to get a closer look to the circumstances when the error happens.

I'll be back with more Information.

Best regards

Manfred