Pins Map - markniu/PandaPi GitHub Wiki

Name	PI GPIO	PandaPI	Klipper(V2.8)	Klipper(V2.9)/standalone(V2.9)
X_Endstop	18	1	PA3	PA3
Y_Endstop	23	4	PA4	PC9
Z_Endstop	7	11	PA1	PA1
X_Step	4	7	PB8	PC11
X_Dir	27	2	PB6	PB6
Y_Step	10	12	PB5	PB5
Y_Dir	24	5	PB4	PB4
Z_Step	11	14	PB3	PB3
Z_Dir	9	13	PA15	PA15
E0_Step	8	10	PB15	PB15
E0_Dir	25	6	PB14	PB14
E1_Step	12	26	PB2	PB2
E1_Dir	26	25	PA7	PC6
E2_Step	1	31	PA6	PC7
E2_Dir	5	21	PA5	PC8
XYZE_ENABLE	17	0	PB9	PC12
BLTOUCH_Signal			PA11	PA11
Heater Bed			PB13	PB13
Heater_Hotend0			PB12	PB12
Heater_Hotend1			PA12	PA12
Fan0(Hotend0)			PA8	PA8
Fan1(model)			PA9	PA9
Fan2(board)			PA10	PA10
Fan3			PB7	PB7
Bed Thermistor			PB1	PB1
Hotend0 Thermistor			PB0	PB0
Hotend1 Thermistor			PA2	PA2
Filament Runout			PA14	PA14
DHT11	22	3
Beeper	19	24		PC3
LCD_BTN	0	30		PA0
LCD_BTN1	6	22		PC4
LCD_BTN2	13	23		PC5
LCD_RS	20	28		PC0
LCD_ENABLE	21	29		PC2
LCD_D4	16	27		PC1
STLINK_SDA			PA13	PA13
STLINK_SCL			PA14	PA14
UART_TMC2209_TX	14	15	PB10	PB10
SD_SS				PA4
SD_SCK				PA5
SD_MISO				PA6
SD_MOSI				PA7

pins_PANDA_PI.h

//
// Steppers
//
#define X_STEP_PIN         7 
#define X_DIR_PIN          2 
#define X_ENABLE_PIN       0 

#define Y_STEP_PIN         12 
#define Y_DIR_PIN          5 
#define Y_ENABLE_PIN       0 

#define Z_STEP_PIN         14 
#define Z_DIR_PIN          13 
#define Z_ENABLE_PIN       0 


#define E0_STEP_PIN        10 
#define E0_DIR_PIN         6 
#define E0_ENABLE_PIN      0 

#define E1_STEP_PIN        26
#define E1_DIR_PIN         25
#define E1_ENABLE_PIN      0

#define E2_STEP_PIN        31
#define E2_DIR_PIN         21
#define E2_ENABLE_PIN      0

Pins for LCD12864 REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER

	#define LCD_PINS_RS      28 
	#define LCD_PINS_ENABLE  29 
	#define LCD_PINS_D4      27  
	#define BEEPER_PIN		24 
	#define BTN_ENC 		30 
	#define BTN_EN1 		22 
	#define BTN_EN2 		23 

For example, if you want to switch extruder motor E0 and E2 on the board. just switch the driver pins of E0 and E2 in pins_PANDA_PI.h

before:

#define E0_STEP_PIN        10 
#define E0_DIR_PIN         6 
#define E0_ENABLE_PIN      0 

#define E2_STEP_PIN        31
#define E2_DIR_PIN         21
#define E2_ENABLE_PIN      0

after:

#define E0_STEP_PIN        31 
#define E0_DIR_PIN         21 
#define E0_ENABLE_PIN      0 

#define E2_STEP_PIN        10
#define E2_DIR_PIN         6
#define E2_ENABLE_PIN      0

will i still be able to control the lights and psu from the pi ?

you can find all the GPIO pins of raspberryPi on pandapi board. if your printer have only one extruder, the GPIO for E1 and E2 drivers are free,so you can connect them out from the driver connector and used as you want.