Description Based on DRV8825 drive board, or A4988 board. Please buy it alone here. Board main control chip CH554 Accept control signal via USB or RS-485 Send pulse control signal to DRV8825 We provide simple demo code, USB CDC to send 1/2 to run motor Back selectable power VCC 3.3V or 5V On board RS-485 chip, connect to CH554 UART1, P32/P34, DIR P12 Back center magnetic encoder MT6816 The system can be built to close-loop Communicate with CH554 via SPI interface Optional PWM signal to P11 MCU by jumper We don’t provide demo code for this yet Optional programmable LED P10 Lead out serial debug interface and possible extra pins All documentation please see on this page.
