I have recently been working on a CNC BoosterPack that I will make available on Github when completed later in the spring.
Current specifications:
Support for my HALified version of GRBL (based on 1.1), currently drivers has been made for MSP432 (black version), Tiva C and MSP430F2955.
NOTE: firmware is built with CCS 6.1, MSP432 driver is 100% CMSIS based.
Opto-coupled inputs, NC switches recommended.
Opto-coupled outputs with 200mA open drain drive for spindle on, spindle direction, flood and mist.
Can drive most relays and solenoids directly.
Outpu