I am using a Microblaze CPU with FRTOS version 8.2.3. Is it possible to increase the stack size beyond the limit imposed by the prototype of function xTaskCreate. usStackDepth is declared as a unsigned short which means, on a 32 bit Microblaze, the stack for threads has a maximum limit of 4 * 65353 = 262140 bytes (256 KB). I know there a lot of questions regarding stacks size and I have been through them but they do not seem to answer the above question. Thanks.

FreeRTOS V10 introduced a macro configSTACKDEPTHTYPE that can be defined in FreeRTOSConfig.h to whichever type you like – if it is left undefined then it defaults to uint16_t for backward compatibility. You could either just drop the FreeRTOS V10 source files over the top of your V8.2.3 files to upgrade the FreeRTOS version, or grep the V10 code to see everywhere where configSTACKDEPTHTYPE is used and make the same chanages in your V8.x code.

Thanks for the information.

I do not expect details, but in your opinion, how compatible would you expect the CPU port layer to be with FRTOS 10; when it was written for FRTOS 8.2.3?

It should be a drop in replacement. Best thing to do would be to take a back up of what you have already, drop the new files in (all of them, including the port layer, etc.) and give it a go. You can always revert.