Remora SPI

Remora SPI is available with the Raspberry Pi SBC. As the hard realtime requirements are offloaded onto the controller board, Remora can run on RPi 3B, RPi 3B+ and RPi 4B versions.

../../_images/rpi-pinout.png

Wiring to Raspberry Pi

RPI PIN

COLOR

PIN DESCRIPTION

RPI_PIN_19

RED

MOSI when SPI0 in use

RPI_PIN_21

ORANGE

MISO when SPI0 in use

RPI_PIN_23

GREEN

CLK when SPI0 in use

RPI_PIN_24

YELLOW

CE0 when SPI0 in use

RPI_PIN_22

BROWN

PRU Reset GPIO 25

RPI_PIN_10

PURPLE

RPI RXD

RPI_PIN_8

GREY

RPI TXD
../../_images/rpi-wire-diag2b.png

Controller Boards

In general any controller board that is based on an LPC1768, LPC1769, STM32F407. STM32F429, or STM32F446 microcontroller can be used, provided that an SPI interface is available. “Smoothieware” compatible controller boards are common and include:

  • Mks-Sbase V1.3 - Tested. Requires on board jumper to allow the J3 header connector to be used for SPI communication

  • Bigtreetech SKR V1.3 - Tested

  • Bigtreetech SKR V1.4 - Tested. For TURBO version use LPC1769 firmware version.

  • Re-ARM - Under test

  • Bigtreetech SKR V2.0 - Tested. STM32F407 and STM32F429 versions.

  • Bigtreetech Octopus v1.1 - Tested STM32F446.

  • Bigtreetech Octopus PRO - Tested. STM32F429 and STM32F446 versions.

  • Fysetc Spider v2.2 - Tested with Mbed6

  • Mks-Monster8 v1 - Tested with Mbed6, no bootloader

  • Expatria Technologies Flexi-HAL - Designed for SPI Remora and RPI integration. https://github.com/Expatria-Technologies/remora-flexi-hal