The pin names of the Fly-E3-v2 in the firmware
Warning: The silk screen on the back of the Fly E3 V2 has 4 errors. The EXP2 pin labeled A13 is Reset. The EXP2 pin labeled +5v is not connected. The Y driver socket STEP is PE4 and UART pin is PB6. The EXP1 pins labelled E14 and E15 are swapped. The diagrams below are correct.
Fly-E3-v2 Pinout Diagram
Fly-E3-v2 Drivers Pins in Firmware
Driver pin numbers. They are separated into driver number.
| Pin Type | 0 (X) | 1 (Y) | 2 (Z) | 3 (E0) | 4 (E1) |
|---|---|---|---|---|---|
| Step Pins | PE_5 | PE_4 | PE_1 | PE_2 | PE_0 |
| Direction Pins | PC_0 | PC_13 | PB_7 | PD_5 | PD_1 |
| Enable Pins | PC_1 | PC_14 | PE_3 | PD_6 | PD_3 |
| UART Pins | PC_15 | PB_6 | PD_7 | PD_4 | PD_0 |
Fly-E3-v2 Other Pins in Firmware
If more than one pin name is availble, either name can be used in the firmware (config.g).
If the pins aren’t in the table (due to not having a special name), then the pin itself can be used in the form of PA0, PA.0, PA_0, A0, PA_0 or A_0.
| Pin Number | Pin Name 1 | Pin Name 2 | PWM Hardware Timer |
|---|---|---|---|
| PC_4 | e0temp | t0 | |
| PC_5 | e1temp | t1 | |
| PB_1 | bedtemp | tb | Timer 3 |
| PE_7 | xmin | xstop | |
| PE_8 | ymin | ystop | |
| PE_9 | zmin | zstop | |
| PE_6 | servo0 | Timer 9 | |
| PC_2 | probe | ||
| PB_0 | bed | hbed | Timer 3 |
| PC_6 | e0heat | he0 | Timer 8 |
| PC_7 | e1heat | he1 | Timer 3 |
| PA_0 | fan0 | fan | Timer 2 |
| PA_1 | fan1 | Timer 2 | |
| PA_2 | fan2 | Timer 2 | |
| PA_3 | fan3 | Timer 2 | |
| PD_10 | BEEP | ||
| PA_8 | LCDEN | ||
| PE_14 | LCDD5 | ||
| PA_14 | LCDD6 | ||
| PA_6 | LCDMISO | Timer 13 | |
| PB_11 | BTNEN2 | Timer 2 | |
| PB_10 | BTNEN1 | Timer 2 | |
| PE_13 | TFCD | LCDCD | |
| PC_9 | SDD1 | Timer 8 | |
| PC_8 | SDD0 | Timer 8 | |
| PC_12 | SDSCK | ||
| PD_2 | SDCMD | ||
| PC_11 | SDD3 | ||
| PC_10 | SDD2 | ||
| PA_9 | TX1 | BTNENC | |
| PA_10 | RX1 | LCDRS | |
| PE_15 | LCDD4 | ||
| PA_13 | LCDD7 | ||
| PA_5 | LCDSCK | Timer 2 | |
| PA_4 | LCDSS | ||
| PA_7 | LCDMOSI |
Configured SPI connections
The below SPI channels are preconfigured in the firmware.
Where NoPin is present, then that pin is not configured by default.
| SPI Channel | CLK | MISO | MOSI | Hardware or Software | Use |
|---|---|---|---|---|---|
| 0 | PA_5 | PA_6 | PA_7 | Hardware | EXP2 |
| 1 | PB_13 | PB_14 | PB_15 | Hardware | WiFi |
| 2 | PB_3 | PB_4 | PB_5 | Hardware | Drivers |
| 3 | PD_12 | PD_13 | PD_11 | Software | MAX31855 and MAX31865 |
| 4 | PE_14 | NoPin | PA_13 | Software | Single Wire Displays |
| 5 | PE_15 | NoPin | PA_8 | Software | Reprapdiscount Display |