MKS GEN_L is a powerful 3D printer control board with ATMEGA2560 and compatible with RAMPS. V2.1 version the motherboard integrates SPI / UART interface and works with MKS TMC2130/TMC2208 V2.0/TMC2209. It can be used after plugged in. No soldering or flying lead is required ...
After uploading Marlin 2.0.5.3 firmware update through USB port ( SERIAL_PORT 0 ), Marlin reports on LCD display "TMC CONNECTION ERROR". This happens only when MKS_GEN_L_V2 is powered solely by USB cable.
When board is powered by 12V DC at DC terminals, the Marlin 2.0 error message is not present and board operates normally.
I have not experienced any problems with uploading firmware this way, Why are the TMC drivers not connecting with the processor? I only see one diode between the USB 5V power and VDD.
After uploading Marlin 2.0.5.3 firmware update through USB port ( SERIAL_PORT 0 ), Marlin reports on LCD display "TMC CONNECTION ERROR". This happens only when MKS_GEN_L_V2 is powered solely by USB cable.
When board is powered by 12V DC at DC terminals, the Marlin 2.0 error message is not present and board operates normally.
I have not experienced any problems with uploading firmware this way, Why are the TMC drivers not connecting with the processor? I only see one diode between the USB 5V power and VDD.