spi_gpio - gpio references for J5 Pin 2, 3, 4, 6.

ThoPos · Apr 24th 2014

SPI compatibliy between netDCU10 & netDCUA5 moved from "J5 Pin 2, 3, 4, 6" to "J5 Pin 10, 11, 13, 15" - These pins are also used by our i2c bus.
An alternative would be the kernel included spi_gpio driver. For the spi_gpio driver initialization we do need the gpio references ( gpio_request_one(...) ) for J5 Pin 2, 3, 4, 6.

Thanks

ThoPos · Apr 24th 2014

please can you confirm or check my pin assignment?

gpio 5 -> J5 P2 -> CLK
gpio 4 -> J5 P3 -> MOSI
gpio 3 -> J5 P4 -> MISO
gpio 1 -> J5 P6 -> CS

fs-support_HK · Apr 28th 2014

Yes the SPI on pins 2, 3, 4, 6 on NetDCU8/10 was different to other NetDCUs. Usually a NetDCU can only support either I2C or SPI and they use the pins like on NetDCUA5.

But yes, your idea to use a software based SPI should work. At least if you do not have a too high transfer speed. Otherwise you could also consider using the native SPI on pins 10, 11, 13, 15 and use a software I2C on two other pins. This is usually the better solution as I2C has not such high data rates as SPI.

Yes, your gpio numbers are correct.

Your F&S Support Team

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