![]() ![]() Check carefully if pin #15 on Atmega328 is connected to the FET (IRF F540NS in my case) on the PCB. Now, from GRBL wiki,įor Grbl v0.9 and v1.1+ default builds: (NOTE: Z-limit is on D12 and the spindle enable pin uses the hardware PWM on D11.)Īs this for Arduino board, D12 maps to MISO ( pin #16 on TQFP) and D11 maps to MOSI ( pin #15 on TQFP) pins on Atmega328. So you will need to solder extra pin for MOSI. The struggling point is MOSI has no corresponding pin on the 2×17 connector, while others do have: VCC – 2, GND – the bottom row, RST – 4, SCK – 6 (D13), MISO – 24, 26 (Zen). MISO is connected via 100 Ohm resistor to Atmega. The pinout (left to right) is VCC, empty, GND, RST, SCK, MOSI, MISO. The on-board ISP is unpopulated 1×6 connector right below the 2×17 header. Usual ISP connectors comes to 2,54 mm (0,1″ or 100 mils) pitch. Second one, the ISP header IS present on the PCB, but is has 1,27mm (0,05″ or 50 mils) pitch. In the case you heed to to upgrade the Woodpecker CNC control board, you will have to overcome some issues.įirst one, the firmware upgrade via USB is almost(?) impossible, due to the CH340 chip between USB socket and Atmeg328. ![]()
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