hm2_bspi_set_write_function − Register a function to handle the tram write phase of a hostmot2 buffered SPI driver.
int hm2_bspi_set_write_function(char *name, void *func, void *subdata)
Registers a function in an external driver (typically
written in "comp") to be called every time that
the main Hostmot2 driver calls the generic
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
"func" should be a pointer to a function in the sub driver which is to be called to process the pins into BSPI write registers prior to the regular TRAM write phase. The function must take a single argument, a pointer to an individual instance of the internal driver. If defined in comp then the function must /fBnot/fP use the FUNCTION() convenience macro, and the argument to the function in the definition must /fBallways/fP be (struct state *inst).
"subdata" is a pointer to the driver instance internal data. In the case of a driver written in comp this will always be "inst" in the function call.
If using comp then the call to this function should be anywhare in the EXTRA_SETUP code.
Returns 0 on success and -1 on failure.
man hm2_bspi_setup_chan, man hm2_bspi_write_chan, man hm2_tram_add_bspi_frame man hm2_allocate_bspi_tram. See src/hal/drivers mesa_7i65.comp for an example usage.