I'm using C6455 EMIF to connect to a C5510 HPI. All data transfer's working great, but I'm running into a race condition which I can't seem to figure out how to solve.
Here's the setup: I've got a couple of ring buffers on both the C6455 and C5510 as well as a couple of memory locations which I access from both chips. 99% of the time (actually, more like 6 nines), everything works fine, but occasionally from the C6455 I attempt to write to a memory location on the C5510 while the C5510 is also trying to write to that same memory location. Of course bad things happen, and the resultant value at that memory location becomes incorrect.
My question is: Is there any way of preventing something like this? The standard LCK or semaphore techniques obviously won't work because of the data residing on two different chips. I'm trying to come up with some smart way of eliminating this race condition, maybe something like a write and verify on the C5510 (but with less expense). Any suggestions would be appreciated!
