I’d like to modify the pruss_handler routine in uio_pruss.c to write some information into the PRU data memory when an interrupt occurs. What is the simplest way the correct pointers? Maybe they are already in the code somewhere, but I can’t figure it out. Thanks for any suggestions.
You will want to use
char * pointer;
prussdrv_map_prumem(PRUSS0_PRU0_DATARAM, (void **) &pointer);
This will give you a memory pointer to the PRU 0 data memory.
You can use the pointer to read or write memory.
Be sure to declare the memory are volatile in the PRU C code, or the compiler will optimize reads and not read the new values.
You can get more details on the TI web site: