I am working on a BeagleBone Cape version of the RAMPS design, called CRAMPS. I have a stub page created in the RepRap wiki, and KiCAD design files are on github. The design is based primarily on the RAMPS-FD, with changes where needed for the BeagleBone.
The schematic is mostly complete except for assigning some I/O on the BeagleBone P8/P9 pin headers, which I will do based on the PCB layout (in progress). I would appreciate any design review or comments on the schematic.
Features are pretty much identical to the RAMPS-FD, except for the AUX expansion connectors. There is an SPI interface available that will work with the RAMPS-EXT extruder expansion boards, and an I2C header. Both the I2C and SPI headers are 5V tolerant, to allow easier interfacing to existing 5V Arduino add-ons. I plan on using pass-through connectors to support additional expansion, so the large AUX4 connector has been removed, and the AUX2 analog connector has been modified to allow direct interfacing to a 4-wire resistive touch-screen.
Questions and comments welcome!
The schematic is mostly complete except for assigning some I/O on the BeagleBone P8/P9 pin headers, which I will do based on the PCB layout (in progress). I would appreciate any design review or comments on the schematic.
Features are pretty much identical to the RAMPS-FD, except for the AUX expansion connectors. There is an SPI interface available that will work with the RAMPS-EXT extruder expansion boards, and an I2C header. Both the I2C and SPI headers are 5V tolerant, to allow easier interfacing to existing 5V Arduino add-ons. I plan on using pass-through connectors to support additional expansion, so the large AUX4 connector has been removed, and the AUX2 analog connector has been modified to allow direct interfacing to a 4-wire resistive touch-screen.
Questions and comments welcome!