CONRAD Raspberry Pi Pico Servo Driver Board Instruction Manual
- June 12, 2024
- CONRAD
Table of Contents
CONRAD Raspberry Pi Pico Servo Driver Board
The Raspberry Pi Pico Servo Driver Board is a module that allows you to control servos using the Raspberry Pi Pico microcontroller. It provides convenient connections for servo motors and can be easily programmed using the Raspberry Pi terminal.
Description
It is a servo control expansion board for Raspberry Pi Pico
Features
On-board Raspberry Pi Pico interface for Raspberry Pi Pico series boards
supports up to 16-channel servo or PWM outputs. And each channel support
16-bit resolution On-board 5V voltage regulator chip. The output current is up
to 3A.
It can be connected to on-board servo on the battery power supply board
through the VIN terminal, and interface with common servos such as SG90,
MG90S, MG996R for Pico for easy expansion. A complete supporting information
manual is provided(example programs such as Raspberry Pi Pico C/C++ and
MicroPython)
Product parameters
- Working voltage 5V(Pico) or 6~12V(VIN terminal)
- Servo voltage 5V
- Logic voltage 3.3V
- Control interface GPIO Via diameter 3.0mm
- Product size 65 × 56mm
Pins
Wire up
Don’t connect the Pico reversely Observe an end with silk prints on the module
and an end of USB port to determine connection direction. You can also depend
on signals of pins and pins of Pico to determine connection direction.
Programming download
Download via Raspberry Pi, open the Raspberry Pi terminal:And sudo apt-get
install p7zip-full cd ~ sudo wget
https://www.waveshare.net/w/upload/3/31/Pico_Servo_Driver_Code.7z7z
Pico_Servo_Driver_Code.7z -o./Pico_Servo_Driver_Code.7zcd
~/Pico_Servo_Driver_Code
Click the example program to download directly
Use C via Raspberry Pi
We use the Raspberry Pi. Because cnmake has multiple platforms and can be moved, you can compile on the PC.
Compile under the C directory cd ~/Pico_Servo_Driver_Code/c/
Create and enter build directory in the folder and add SDK.
../../pico-sdk is the directory of the SDK. The example program has build,
jsut enter it. cd build export PICO_SDK_PATH=../../pico-sdk
( Note: write the correct pass of your own SDK) Implement cmake and
generate into Makefile files
-
cmake ..
Implement make and generate implement files，the first compile will take a while. -
make -j9
After compiling, the uf2 file will be generated.
Press a key of the Pico board，connect the pico board to the Raspberry Pi via a
USB cable and release the key.
Then Raspberry Pi will recognize a drive( RPI-RP2), copy the main.uf2 from the
build folder to the drive(RPI-RP2).
cp main.uf2 /media/pi/RPI-RP2/
Python
- Update the firmware of Micropython，copy the pico_micropython_xxxxx.uf2 file to the pico.
- Open Thonny IDE on the Raspberry Pi(click Raspberry Pi-> Programming -> Thonny Python IDE), you can check the version information: Help->About Thonny
Make sure this version contain Pico support package, and click Tools ->
Options… -> Interpreter, then select MicroPython(Raspberry Pi Pico and the
ttyACM0 port
As shown below;
Pico-lcd-0.96-img-config2.png
If the Thonny doesn’t have the pico support package, enter the following
comender to update Thonny IDE sudo apt upgrade thonny
Click File->Open…->python/Pico_Servo_Driver_Code/python/servo.py then program
the script
The servo will rotate from 0° to 180°when connected, repeat three times.
Windows
- Open C folder
- Open with the Vs coed and select the compiling tool,
- Click compile
- Press the Reset button on the Pico-Eval-Board to reset the Pico, first press the BOOTSEL button then press the RUN button and release the Reset button. The Pico will enter the disk mode directly.
- Drag the UF2 file under the build file and drop to the RPI-RP2 drive letter
- Pico starts running the corresponding program
Code explanation
Hardware interfaces Since hardware platforms and inner structure are
different, you can check in the corresponding directories
You can check definitions in DEV_Config.c(.h), under the directory:
…\c\lib\Config
Date type:
python
Windows environment
Press and hold the BOOTSET button on the Pico board, connect the pico to the
USB port of the computer through the Micro USB cable, and release the button
after the computer recognizes a removable hard disk (RPI-RP2). Download the
pico_micropython_xxxxx.uf2, then copy it to the drive(RPI-RP2). Open Thonny
IDE(note: use the latest Thonny, otherwise, the Pico support package is not
included. The latest version under Windows is v3.3.3 Click
tool->setting->interpreter, then select the corresponding port of Pico
Click file->open->servo.py and click run
The following picture indicates that the program has run.
The experiment result is as same as the program C
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