The pin names of the SKR Pro v1.2 in the firmware
Warning: The SKR Pro v1.2 sensorless homing jumpers don’t do anything so if you don’t want to use sensorless homing and use normal endstops, you will have to remove the diag pin from your drivers - Evidence
SKR Pro v1.2 Pinout Diagram
Known Errors
- On the UART connector 3.3V is actually 5V
- On th I2C connector 3.3V is actually 5V
SKR Pro v1.2 Driver Pins in Firmware
Driver pin numbers. They are separated into driver number.
| Pin Type | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| Enable Pins | PF_2 | PD_7 | PC_0 | PC_3 | PA_3 | PF_0 |
| Step Pins | PE_9 | PE_11 | PE_13 | PE_14 | PD_15 | PD_13 |
| Direction Pins | PF_1 | PE_8 | PC_2 | PA_0 | PE_7 | PG_9 |
| UART Pins | PC_13 | PE_3 | PE_1 | PD_4 | PD_1 | PD_6 |
SKR Pro v1.1 and v1.2 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, A.0 or A_0.
| Pin Number | Pin Name 1 | Pin Name 2 | PWM Hardware Timer |
|---|---|---|---|
| PA_1 | servo0 | Timer 2 | |
| PA_2 | probe | Timer 2 | |
| PA_8 | BTNENC | ||
| PA_15 | X-CS | Timer 2 | |
| PB_0 | e2heat | he2 | Timer 3 |
| PB_1 | e0heat | he0 | Timer 3 |
| PB_10 | xstop | x-stop | Timer 2 |
| PB_12 | LCD_SS | Timer 2 | |
| PB_13 | LCD_SCK | ||
| PB_14 | LCD_MISO | Timer 12 | |
| PB_15 | LCD_MOSI | Timer 8 | |
| PB_3 | E0-CS | Timer 2 | |
| PB_8 | Y-CS | Timer 10 | |
| PB_9 | Z-CS | Timer 11 | |
| PC_6 | wifi4 | Timer 8 | |
| PC_7 | wifi3 | Timer 3 | |
| PC_8 | fan0 | fan | Timer 8 |
| PD_10 | LCD_RS | ||
| PD_11 | LCD_EN | ||
| PD_12 | bed | hbed | Timer 4 |
| PD_14 | e1heat | he1 | Timer 4 |
| PE_10 | e1stop | e1det | |
| PE_12 | ystop | y-stop | |
| PE_15 | e0stop | e0det | |
| PE_5 | fan1 | Timer 9 | |
| PE_6 | fan2 | Timer 9 | |
| PF_11 | BTN_EN2 | ||
| PF_12 | LCD_CD | ||
| PF_13 | KILL | ||
| PF_14 | wifi5 | ||
| PF_15 | wifi6 | ||
| PF_3 | e0temp | t0 | |
| PF_4 | e1temp | t1 | |
| PF_5 | e2temp | t2 | |
| PF_6 | bedtemp | t3 | Timer 10 |
| PG_0 | wifi1 | ||
| PG_1 | wifi2 | ||
| PG_10 | BTN_EN1 | ||
| PG_12 | E2-CS | ||
| PG_15 | E1-CS | ||
| PG_2 | LCD_D4 | ||
| PG_3 | LCD_D5 | ||
| PG_4 | BEEP | ||
| PG_5 | e2stop | e2det | |
| PG_6 | LCD_D6 | ||
| PG_7 | LCD_D7 | ||
| PG_8 | zstop | z-stop |
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 |
|---|---|---|---|---|
| 0 | PA_5 | PA_6 | PA_7 | Hardware |
| 1 | PB_13 | PB_14 | PB_15 | Hardware |
| 2 | PC_10 | PC_11 | PC_12 | Hardware |
| 3 | NoPin | NoPin | NoPin | Software |
| 4 | NoPin | NoPin | NoPin | Software |
| 5 | NoPin | NoPin | NoPin | Software |