BRAM size problem

[zeph]

In the Address Editor, I can set the size of BRAM to 4KB/8KB/16KB/32KB/64KB/128KB/256KB/... with no problem.

However, I want the BRAM size to be something other than those preset values, e.g. 200KB.

Our design is depleting BRAM. Being able to tailor the size will be very useful.

I tried to toggle the Block Memory Generator  to "Stand Alone" mode, so that I can edit the depths.

Unfortunately, my app does not run on Microblaze on manually modified BRAM (I double checked the linker to fit in the smaller BRAM). Debugger prints a random stack.

Board: ZCU106, Vivado 2019.1

Thank you very much!

 

[dgisselq · Accepted solution]

@zeph ,

I'd recommend getting a bigger FPGA instead.  Non-power of two block RAM sizes are known simulation vs synthesis mismatch issues across a host of EDA tools--not just Vivado.

Dan