Shared memory usage in MPC5746C

jayasankar_band — Thu, 26 Dec 2019 06:23:06 GMT

Hello,

I am working on MPC5746C MCU and recently I have declared a shared memory regions in SRAM memory section.

When I use "memset" function to reset the memory region, it is causing an exception and leading to an ISR.

The object declaration is as shown below.

Is this the correct way ? Any mistake in declaring and processing the shared memory ?

Re: Shared memory usage in MPC5746C

stanish — Tue, 28 Jan 2020 13:30:15 GMT

Hi,

the snippet of your shared memory section seems to be correct.

Please check in the map file the object ShmMsgToCore1 is placed at valid address 0x4007C800.

I assume the entire SRAM is initialized by the startup to avoid ECC exceptions by core0.

Could you possibly narrow it down to which specific instruction/core is causing the exception?

Is it indeed memset() or some other following statement?

Also you might be interested in this example:

Hope it helps.

Stan