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Raspberry Pi Pico Servo Driver Board

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)

Summary of content (12 pages)

PAGE 1
Raspberry Pi Pico Servo Driver Board 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.
PAGE 2
Product parameters Working voltage 5V(Pico) or 6~12V(VIN terminal) Servo voltage 5V Logic voltage 3.3V Control interface GPIO Via diameter 3.
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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.7z 7z Pico_Servo_Driver_Code.7z -o./Pico_Servo_Driver_Code.
PAGE 4
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 ..
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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 1. Update the firmware of Micropython，copy the pico_micropython_xxxxx.uf2 file to the pico. 2. 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.
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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.
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Open C folder Open with the Vs coed and select the compiling tool, 7
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Click compile 1. 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.
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Pico will enter the disk mode directly. 2. Drag the UF2 file under the build file and drop to the RPI-RP2 drive letter 3. 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： 9
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#define UBYTE uint8_t #define UWORD uint16_t #define UDOUBLE uint32_t module initialization and exit void DEV_Module_Init(void); void DEV_Module_Exit(void); PWM initialization： void PWM_initialization()； interrupt handler function： void on_pwm_wrap()； Define the channel used #define CHANNE_N 0xFFFF // 0x0001 means 0 channel is open, 0x0000 means all channels are closed Angles of rotation #define ROTATE_0 1700 //rotate to 0° #define ROTATE_45 3300 //rotate to 45° #define ROTATE_90 4940 //rotat
PAGE 11
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.
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Click file->open->servo.py and click run The following picture indicates that the program has run.