hm2_tram_add_bspi_frame(3)

hm2_tram_add_bspi_frame Add a regular (every thread) write event to the Hostmot2 tram for bspi instance "name". "name" is a unique string given to each bspi channel during hostmot2 setup. The names of the available channels are printed to standard output during the driver loading process and take the form: hm2_<board name>.<board index>.bspi.<index> For example hm2_5i23.0.bspi.0

This function is used to add a regular, every thread, write or write-read transaction to the Translation RAM system. A write need not have a read (use 0 for rbuff) but it is an error to have a read without a write. Note that the TRAM list is not actioned until the hm2_allocate_bspi_tram function is called. The read and write parameters must be pointers to pointers, as TRAM re-maps the buffers into contiguous memory.

Call only from realtime init code, not from other realtime code or non-realtime components.

Returns 0 on success and -1 on failure.

hm2_allocate_bspi_tram(3), hm2_bspi_set_read_function(3), hm2_bspi_setup_chan(3), hm2_bspi_set_write_function(3), hm2_bspi_write_chan(3)

See src/hal/drivers mesa_7i65.comp for an example usage.