Hi all, I plan to interface with 8 SPI slave devices using the BBBlue along with the RoboticsCape libraries.
I plan to use a 3-to-8 line decoder (CD74AC138E) so that I will only need three GPIO pins to access the slave select of each device. Has anyone done anything similar to this before? I presume some form of bit-banging will be necessary, though I'm not yet certain what code I need to modify to make this possible. It looks like modifying rc_spi.c <https://github.com/StrawsonDesign/Robotics_Cape_Installer/blob/master/libraries/serial_ports/rc_spi.c> might be my best bet. In particular, it looks like i would need to modify the switch statements in *rc_manual_select_spi_slave()* and *rc_manual_deselect_spi_slave()*, as well as the gpio_ss array initialization in *rc_spi_init()*. The gpio_ss array currently uses BLUE_SPI_PIN_6_SS1 and BLUE_SPI_PIN_6_SS2 GPIOs for slave selects. Will I also be able to use the pins on the GPIO headers to control slave selections? Thanks, Robert -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/2ffe5403-6a40-40ce-9684-9b7129a9267e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
