Kinetis MicrocontrollersのトピックRe: K64f Writing to flash within RTOS while leaving interrupts enabled

K64f Writing to flash within RTOS while leaving interrupts enabled

unknowncoder — Tue, 03 Apr 2018 14:08:50 GMT

Hello,

I am using the program flash to save some data.

The flash block (i.e 4KB) that stores the data is not used for anything else that is the entire block is dedicated to storing data.

Now if this the case do I need to disable interrupts to avoid memory access violations like Read while write (RWW).

As far as I understand if the block doesn't have anything else accessing it this should be fine.

The ways the flash write layer is mutex protected between threads.

Re: K64f Writing to flash within RTOS while leaving interrupts enabled

mjbcswitzerland — Tue, 03 Apr 2018 16:04:20 GMT

The K64 has 4k sectors (not blocks). It has 2 x 512k blocks (also often referred to as planes). This means that you can't access any code in a 512k block (or a sector in that block) when the same block is being operated on (written/erased).

Regards

Mark

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Re: K64f Writing to flash within RTOS while leaving interrupts enabled

unknowncoder — Tue, 03 Apr 2018 16:28:48 GMT

Hi,

Thanks for clearing this up I was thinking of the sectors as block.