Revolt is a dual 48 V compatible stepper motor driver add-on board. It is based on TMC5160.
The Revolt add-on baord is designed to stack on top of the Recore A7 board. There are two dual row connectors on the Revolt board, but only one on Recore A7. This means that there is only a software enable/disable for the TMC5160 drivers. It is enabled by default. There is also no diag output from the drivers. Those are broken out on the two other rows and can be connected to pins on the MCU header or DBG header if sensorless homing is required.
This config is using stepper x and y as the high voltage drivers, typical of a core-xy printer setup for speed. This gives the option of having 4 Z-drives and two extruders, 8 steppers in total.
This section sets up the two drivers (X = S6 and Y = S7)
[tmc5160 stepper_x] run_current: 0.6 hold_current: 0.2 sense_resistor: 0.05 cs_pin: ar100:PD0 spi_software_sclk_pin: ar100:PD2 spi_software_mosi_pin: ar100:PD1 spi_software_miso_pin: ar100:PD3 chain_position: 2 chain_length: 2 stealthchop_threshold: 9999 [tmc5160 stepper_y] run_current: 0.6 hold_current: 0.2 sense_resistor: 0.05 cs_pin: ar100:PD0 chain_position: 1 chain_length: 2 stealthchop_threshold: 9999
To route step and dir signals to the same motors:
[stepper_x] step_pin: ar100:PL10 dir_pin: ar100:PE14 [stepper_y] step_pin: ar100:PL11 dir_pin: !ar100:PE15
Klipper needs to be recompiled to add software based SPI. Starting with Refactor v3.2.0-RC3
cd /home/debian/klipper nano src/Makefile <remove thermocouple.c sensor_adxl345.c and sensor_angle.c> make menuconfig <enable Support software based SPI "bit-banging"> make clean make mv out/ar100.bin /opt/firmware/