BIG TREE TECH M4P User manual

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
1/ 34
BIGTREETECH
M4P & CB1
User Manual

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
2/ 34
Contents
Contents .........................................................................2
Revision History ..................................................................4
1. Brief Introduction ...............................................................5
1.1 Main Features .............................................................5
1.1.1 CB1 .................................................................5
1.1.2 M4P .................................................................5
1.2 Basic Parameters ..........................................................6
1.3 Product Dimension ........................................................7
2. Peripheral Interface .............................................................8
2.1 Interface Diagram ......................................................8
2.1 Pin Out................................................................8
3. Interface Instruction.............................................................9
3.1 Installing the Core Board ...................................................9
3.2 40 pin GPIO ...............................................................9
3.3 Type-C ...................................................................10
3.4 Stepper Driver ............................................................10
3.4.1 Normal STEP/DIR(STANDALONE) Mode...............................10
3.4.2 UART Mode of TMC Driver ...........................................12
3.4.3 SPI Mode of TMC Driver .............................................12
3.4.4 DIAG(Sensorless Homing) of TMC Driver .............................12
3.4.5 Stepper Driver Voltage Selection .....................................13
3.4.5.1 Driver independent power supply .................................13
3.4.5.2 Main power supply..............................................13
3.5 BLTouch Wiring...........................................................14
3.6 EXP1+EXP2 and LCD Screen Wiring........................................14
3.7 RGB Wiring ..............................................................15
3.8 DSI/CSI Wiring............................................................15

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
3/ 34
3.9 SPI Display Wiring ........................................................16
4. Raspberry PI CM4 Setup steps ..................................................17
4.1 Download OS Image ......................................................17
4.2 Download and Install Raspberry Pi Imager ..................................17
4.3 Write OS Image ...........................................................18
4.3.1 CM4 LITE Version (Micro SD Card)....................................18
4.3.2 CM4 eMMC Version(Note: eMMC version will not tun the system from the
Micro SD card.) ..........................................................21
4.4. System Settings (CM4) ...................................................22
4.4.1 USB 2.0 Hub Ports ..................................................22
4.4.2 DSI1 Display Interface ...............................................22
4.4.3 CSI1 Camera........................................................22
5. BIGTREETECH CB1 Setup steps ................................................22
5.1 Download OS Image ......................................................22
5.2 Download and Install Raspberry Pi Imager ..................................22
5.3 Write OS Image ...........................................................23
5.4 WIFI Setting ..............................................................25
5.5 Install Klipper with kiauh Script ............................................25
5.6 Checkout Klipper Branch..................................................27
5.7 Fix KlipperScreen.........................................................28
6. Configure the motherboard .....................................................29
6.1 ssh connect to device .....................................................29
6.2 Compile firmware .........................................................31
6.3 Firmware update..........................................................32
6.3.1 Update using SD Card ...............................................32
6.3.2 Update using DFU...................................................32
6.4 Configure Klipper .........................................................33
7. Precautions ...................................................................34

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
4/ 34
Revision History
Revision
Description
Date
01.00
1st Draft
2022/06/01
01.01
Fix 40 pin GPIO
2022/06/20
01.02
1. More detailed CB1 dimension
2. Add wiring of M4P + expansion module
3. Add MCU configuration, system settings, etc…
2022/06/27

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
5/ 34
1. Brief Introduction
BIGTREETECH CB1 is an alternative to Raspberry Pi CM4, which is currently out of
stock. BIGTREETECH M4P is a 4-axis motherboard using a CM4 BTB header, which
can work with CB1 or CM4 perfectly.
1.1 Main Features
1.1.1 CB1
1. CPU: Allwinner H616, Quad-core Cortex-A53 @1.5GHz
2. GPU: Mali G31 MP2, support OpenGL3.2
3. RAM: 512MB/1GB DDR3L SDRAM
4. Display: HDMI2.0A interface, support 4K display
5. USB 2.0 port
6. 100M Ethernet + 100M WiFi
7. The same BTB header as the Raspberry Pi CM4
1.1.2 M4P
1. DSI1, CSI1 interface (for CM4)
2. Gigabit Ethernet interface (1000M for CM4, 100M for CB1)
3. 3 USB 2.0 ports
4. Equipping the ESD protection chip on the USB and Ethernet ports to prevent being
broken down by the static electricity
5. When working with Raspberry Pi CM4, its 40pin pin header has the same function
as that of Raspberry Pi(Custom IO for CB1)
6. Using a BTB board-to-board connection, which can be further reinforced with
screws, perfectly compatible with CB1 or Raspberry Pi CM4
7. The MCU adopts STM32G0B0RE 32-bit ARM Cortex-M0+ @64MHz chip
8. The power chip adopts TPS5450-5A, which supports DC12/24V power input, the
output current of the chip is up to 5A, and the peak value can reach 6A, which
perfectly supports the power supply of the core board
9. The protection circuit of the thermistor part prevents the main control chip from
burning due to leakage of the heated bed or heater cartridge

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
6/ 34
10. In CNC fan ports: FAN0, FAN1, and FAN2, a 24V (DCIN) or 5V power supply can
be selected with a jumper cap (Note: the voltage of the three CNC fans should be
the same, and cannot be set to different voltages individually)
11. MCU firmware can be upgraded through SD card, or through DFU with Klipper's
make flash command
12. On-board TMC-driven SPI and UART working modes, on-board DIAG function
pins, can be used by simply plugging and unplugging the jumper cap
13. Support filament runout detection, BLTouch, RGB lights...
14. Adopt replaceable fuse for easy replacement
1.2 Basic Parameters
1. Product Size: 160 x 95mm
2. Installation Size: 146 x 84.2mm; 97 x 84.2mm
3. Core Board Installation Size: 33 x 48mm
4. The maximum output current of the heated bed port: 10A
5. The maximum output current of the heater cartridge port: 6A
6. Fan Port: Three for CNC Fan(24V/5V Voltage Selectable), One SoC Fan(Voltage
not Selectable)
7. The maximum output current of the fan port:1A
8. Total current for heater cartridge + driver + fan: ＜20A
9. Extended Interface: BLTouch(Servos, Probe), Fil-DET, 2 * RGB
10.Motor Driver: Support TMC5160, TMC2209, TMC2225, TMC2226, TMC2208,
TMC2130, ST820, LV8729, DRV8825, A4988...
11.Driver Working Mode Support: SPI, UART, STEP/DIR
12.Motor Drive Interface: X, Y, Z(Dual Z-axis), E0, a total of four.
13.Temperature Sensor Interface: 2-way 100K NTC
14.Display Screen: RepRapDiscount EXP-1 + EXP-2

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
7/ 34
1.3 Product Dimension

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
8/ 34
2. Peripheral Interface
2.1 Interface Diagram
2.1 Pin Out

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
9/ 34
3. Interface Instruction
3.1 Installing the Core Board
M4P+CM4：Pay attention to the direction, as shown below.
M4P+CM4：Pay attention to the direction, as shown below.
3.2 40 pin GPIO
When working with CM4, the pin arrangement of 40 Pin GPIO is exactly the same as
that of Raspberry Pi. When working with CB1, it is a custom IO arrangement, as
shown in the figure below, the 'GPIO4' in front of '_' is the IO of CM4, and the latter
'PC7' is the IO of CB1.

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
10 / 34
3.3 Type-C
After the M4P is powered on, the red LED1 on the lower right side of the motherboard
will light up, indicating that the power supply is normal. The J8 on the middle of the
board is the power selection terminal, it needs to be short circuited only when the type-
C USB is used to supply power to the motherboard or the USB is used to supply power
externally. The signal of type-C is connected to the SoC, Only used when writing OS
image for CM4 eMMC version.
3.4 Stepper Driver
3.4.1 Normal STEP/DIR(STANDALONE) Mode
For example, A4988, DRV8825, LV8729, ST820...use the jumper cap to short MS0-
MS2 according to the driver subdivision table.
Note: If using A4988or DRV8825, RST and SLP must be shorted with jumper caps for
normal operation.

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
11 / 34
Driver chips
MS1
MS2
MS3
Microsteps
Excitation Mode
A4988
16 microstep
max
35V 2A
L
L
L
Full Step
2 Phase
H
L
L
1/2
1-2 Phase
L
H
L
1/4
W1-2 Phase
H
H
L
1/8
2W1-2 Phase
H
H
H
1/16
4W1-2 Phase
Current
𝐑𝑆=0.1Ω
𝐈𝐓𝐫𝐢𝐩𝐌𝐀𝐗 = 𝐕𝐑𝐄𝐅
𝟖 ∗ 𝐑𝑆
Driver chips
MODE2
MODE1
MODE0
Microsteps
Excitation Mode
DRV8825
Maximum
32microsteps
8.2V-45V 2.5A at
24V T=25℃
L
L
L
Full Step
2 Phase
L
L
H
1/2
1-2 Phase
L
H
L
1/4
W1-2 Phase
L
H
H
1/8
H
L
L
1/16
H
L
H
1/32
H
H
L
1/32
H
H
H
1/32
Current
𝐑𝐼𝑆𝐸𝑁𝑆𝐸=0.1Ω
𝐈𝐂𝐇𝐎𝐏 = 𝐕(𝐱𝐑𝐄𝐅)
𝟓 ∗ 𝐑𝐼𝑆𝐸𝑁𝑆𝐸
Driver chips
MD3
MD2
MD1
Microsteps
Excitation Mode
LV8729
Maximum
128microsteps
36V 1.8A
L
L
L
Full Step
2 Phase
L
L
H
1/2
1-2 Phase
L
H
L
1/4
W1-2 Phase
L
H
H
1/8
2W1-2 Phase
H
L
L
1/16
4W1-2 Phase
H
L
H
1/32
8W1-2 Phase
H
H
L
1/64
16W1-2 Phase
H
H
H
1/128
32W1-2 Phase
Current
RF1=0.22Ω
𝐈OUT = (𝐕𝐑𝐄𝐅 / 5 ) / RF1
Driver chips
MS3
MS2
MS1
Microsteps
ST820
Maximum
256microsteps
45V 1.5A
L
L
L
Full Step
L
L
H
1/2
L
H
L
1/4
L
H
H
1/8
H
L
L
1/16
H
L
H
1/32
H
H
L
1/128
H
H
H
1/256
Current
Rs=0.15Ω
𝐈𝐩𝐞𝐚𝐤 = 𝐕𝐑𝐄𝐅∗ 𝐕𝐃𝐃
𝟓 ∗ 𝐑𝐒

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
12 / 34
3.4.2 UART Mode of TMC Driver
For example, TMC2208, TMC2209, TMC2225... Use a jumper cap for each to connect
the position of the red box in the figure, and the subdivision and driver current is set by
firmware.
3.4.3 SPI Mode of TMC Driver
For example, TMC2130, TMC5160, TMC5161... Use 4 jumper caps for each to
connect the position of the red box in the figure, and the subdivision and driver current
is set by firmware.
3.4.4 DIAG(Sensorless Homing) of TMC Driver
As shown in the figure, plug the jumper cap when using the Sensorless Homing
function, and leave it unplugged when it is not used. There is no need to cut the DIAG
pin of the driver.

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
13 / 34
3.4.5 Stepper Driver Voltage Selection
The power supply of each driver can be set by the jumper. When the jumper is inserted
into the left side, the independent MOTOR POWER port is used for driver power, and
the supported voltage up to 56V. When the jumper is inserted into the right side, the
main POWER port is used for driver power, and the 12/24v voltage is supported.
3.4.5.1 Driver independent power supply
The jumper is inserted into the left side and powered by the MOTOR POWER port. the
supported voltage up to 56V.
3.4.5.2 Main power supply
The jumper is inserted into the right side and powered by the main POWER port. the
12/24v voltage is supported.

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
14 / 34
3.5 BLTouch Wiring
3.6 EXP1+EXP2 and LCD Screen Wiring

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
15 / 34
3.7 RGB Wiring
3.8 DSI/CSI Wiring

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
16 / 34
3.9 SPI Display Wiring

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
17 / 34
4. Raspberry PI CM4 Setup steps
4.1 Download OS Image
If CM4 core board is used, You can directly download the images of Fluidd or
Mainsail, also can download the OS image from the official website of Raspberry Pi
Fluidd: https://github.com/fluidd-core/FluiddPI/releases
Mainsail: https://github.com/mainsail-crew/MainsailOS/releases
Raspberry Pi official OS: https://www.raspberrypi.com/software/operating-systems
(CM4 needs to refer to the following system settings to enable the system's USB, DSI
and other interfaces, whose operation is slightly different from the standard Raspberry
Pi 3B, 4B, etc.)
4.2 Download and Install Raspberry Pi Imager
Install the official Raspberry Pi Imager: https://www.raspberrypi.com/software/

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
18 / 34
4.3 Write OS Image
4.3.1 CM4 LITE Version (Micro SD Card)
1. Plug the Micro SD card into the computer via a card reader.
2. Select Operating System.
3. Select "Use Custom", then select a custom.img from your computer.

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
19 / 34
4. Click the setting icon in the lower right corner
5. “Enable SSH”and click“SAVE”， There are other features that can be set in this
menu. Please modify them according to your own needs. Details are as follows：
Set hostname: raspberrypi.local //Custom hostname Default:raspberrypi.local
Enable SSH
Set username and password // Custom username and password，Default
username: pi password：raspberry
Configure wireless LAN // Custom the SSID and password of WLAN

Shenzhen Big Tree Technology Co., Ltd.
BIGTREETECH
20 / 34
6. Select the Micro SD card and click "WRITE" (Writing the image will format the
Micro SD card. Be careful not to select the wrong storage device, otherwise, the
data will be formatted).
7. Wait for the writing to finish.