Hello everyone.
I am facing a problem to use scratchpad to share data between PRU0 and PRU1.
On PRU1 I got:
MOV R10, 11111
XOUT 10, R10, 4
// some code that will trigger PRU0
// some other code to wait for PRU0 return signal
XIN 10, R20, 4
// some code to send R20 to shared data ram
HALT
On PRU0 I got
//Some code to wait signal from PRU1
MOV R10, 12321
XOUT 10, R10, 4
// some code to signal PRU0 we are finished
HALT
In the ARM side, I can read the shared data ram but it contents is always 11111. This means that PRU0 is not updating the scratchpad, as the expected result would be 12321.
How am I supposed to access the scratch pad?
My specs are:
Beaglebone black REV A6A, running debian
pasm assembler… I had tried -V2 and -V3 as the default -V1 option complains on the XIN and XOUT instructions.