Raspberry Pi PICO RP2040-PiZero User Guide

Code

• RP2040-PiZero-Code

Schematic diagram

• RP2040-PiZero

Introduction

RP2040-PiZero is a high-performance and cost-effective microcontroller board designed by Waveshare, onboard DVI interface, TF card slot and PIO-USB port, compatible with Raspberry Pi 40PIN GPIO header, easy to develop and integrate into the products.

Features

• RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom
• Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz
• 264KB of SRAM, and 16MB of onboard Flash memory
• Onboard DVI interface can drive most HDMI screens (DVI compatibility required)
• Supports using as a USB host or slave via onboard PIO-USB port
• Onboard TF card slot for reading and writing TF card
• Onboard Lithium battery recharge/discharge header, suitable for mobile scenarios
• USB 1.1 with device and host support
• Drag-and-drop programming using mass storage over USB
• Low-power sleep and dormant modes
• 2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC, 16 × controllable PWM channels
• Accurate clock and timer on-chip
• Temperature sensor
• Accelerated floating-point libraries on-chip
• 8 × Programmable I/O (PIO) state machines for custom peripheral support

Pico Quick Start

Download Firmware

• MicroPython Firmware Download

• C_Blink Firmware Download

MicroPython Series

• 【MicroPython】 machine.Pin Function
• 【MicroPython】 machine.PWM Function
• 【MicroPython】 machine.ADC Function
• 【MicroPython】 machine.UART Function
• 【MicroPython】 machine.I2C Function
• 【MicroPython】 machine.SPI Function
• 【MicroPython】 rp2.StateMachine

C/C++ Series

• 【C/C++】 Windows Tutorial 1 - Environment Setting
• 【C/C++】 Windows Tutorial 1 - Create New Project

Arduino IDE

Installieren Arduino IDE

1. Download the installation package of Arduino IDE from Arduino official website.
   
   
2. Select Just download.
   
   
3. After downloading, click Install.
   Note: During the installation process, you will be prompted to install the driver. We can click on Install to proceed
   
   

Installing Arduino Pico Core in the Arduino IDE

1. Arduino IDE, click the file in the upper left corner, and select preferences.
   
   
2. Add the following link to the URL of the additional development board manager, and then click OK.

   https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

   
   Note: If you already have an ESP32 board URL, you can separate the URLs with commas, as shown below:
   

   https://dl.espressif.com/dl/package_esp32_index.json,https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

3. Click tools > development board > development board manager > search pico, because my computer has been installed, it shows that it is installed.
   
   

First upload program

1. Press and hold the BOOTSET button on the Pico board, connect the Pico to the USB interface of the computer through a Micro USB cable, and wait for the computer to recognize a removable hard drive (RPI-RP2) before releasing the button.
   
   

1. Download the program and open D1-LED.ino under arduino\PWM\D1-LED path.
2. Click on Tools>Port, remember the existing COM, there is no need to click on this COM (different computers display different COM, remember the existing COM on your own computer)
   
   
3. Connect the driver board to the computer using a USB cable, then click Tools>Port, and select uf2 Board for the first connection. After uploading, connecting again will result in an additional COM port
   
   
4. Click tools > development board >Raspberry Pi Pico/RP2040>Raspberry Pi Pico
   
   
5. After setting, click the right arrow to upload the program.
   

C routine

01-DVI

• Routine is modified based on Wren6991 PicoDVI.

Main directory analysis

• Apps directory: routine source code
• Assets directory: original images and image header files
• Include directory: default pin configuration header file
• Libdvi directory: about DVI driver source code
• Libgui directory: about GUI source code

Hello DVI routine description

• The Hello DVI routine is located in the Hello directory in the apps directory_ Under the dvi file
• In 640x480p 60Hz DVI mode, scroll to display a test image with a resolution of 320x240p RGB565.

Gui Demo routine description

• The gui demo routine is located in the gui demo file in the apps directory
• In 640x480p 60Hz DVI mode, brush white, red, yellow, green, cyan, blue, purple, and black in sequence, and then brush GUI images

02-USB

• Routine is modified based on sekigon-gonnoc的Pico-PIO-USB

Main directory analysis

• examples：Routine source code
• src：About PIO-USB driver source code

capture_hid_report Routine description

• Capture_ Hid_ The report routine is located in the capture directory under the examples directory_ Hid_ Report

1. PIO-USB will serve as a USB host example program for printing HID reports received from devices.

usb_device Routine description

• USB_ The device routine is located in the USB directory under the examples directory_ Device

PIO-USB will simulate a mouse and move the mouse cursor every 0.5 seconds

Host_hid_to_device_cdc Routine description

• Host_ Hid_ To_ Device_ The cdc routine is located in the Host directory under the examples directory_ Hid_ To_ Device_ Cdc

Host_ Hid_ To_ Device_ Cdc is similar to capture_ Hid_ Report, print mouse/keyboard reports from the host port to the device port's cdc.

03-MicroSD

Main directory analysis

• Tests: source code used for testing
• FatFs_ SPI: MicroSD related driver source code

Routine description

1. Use terminal tools such as putty or mobaxterm to open the USB serial port corresponding to RP2040 PiZero
2. Enter and the following information will be displayed

   >

3. Enter the help command to get the available commands, as follows

setrtc <DD> <MM> <YY> <hh> <mm> <ss>:
  Set Real Time Clock
  Parameters: new date (DD MM YY) new time in 24-hour format (hh mm ss)
	e.g.:setrtc 16 3 21 0 4 0

date:
 Print current date and time

lliot <drive#>:
 !DESTRUCTIVE! Low Level I/O Driver Test
	e.g.: lliot 1

format [<drive#:>]:
  Creates an FAT/exFAT volume on the logical drive.
	e.g.: format 0:

mount [<drive#:>]:
  Register the work area of the volume
	e.g.: mount 0:

unmount <drive#:>:
  Unregister the work area of the volume

chdrive <drive#:>:
  Changes the current directory of the logical drive.
  <path> Specifies the directory to be set as current directory.
	e.g.: chdrive 1:

getfree [<drive#:>]:
  Print the free space on drive

cd <path>:
  Changes the current directory of the logical drive.
  <path> Specifies the directory to be set as current directory.
	e.g.: cd 1:/dir1

mkdir <path>:
  Make a new directory.
  <path> Specifies the name of the directory to be created.
	e.g.: mkdir /dir1

ls:
  List directory

cat <filename>:
  Type file contents

simple:
  Run simple FS tests

big_file_test <pathname> <size in bytes> <seed>:
 Writes random data to file <pathname>.
 <size in bytes> must be multiple of 512.
	e.g.: big_file_test bf 1048576 1
	or: big_file_test big3G-3 0xC0000000 3

cdef:
  Create Disk and Example Files
  Expects card to be already formatted and mounted

start_logger:
  Start Data Log Demo

stop_logger:
  Stop Data Log Demo

Arduino Demo

01-DVI

• This demo is based on the modification of Wren6991 PicoDVI.

Hello Dvi

• The Hello DVI demo is located in the "Hello DVI" directory.
• Scrolling display of a test image with a resolution of 320x240p in RGB565 format is in a 640x480p 60Hz DVI mode.

02-USB

• This demo is based on the modification of sekigon-gonnoc Pico-PIO-USB.

device_in

• The device_in demo is located in the "device_in" directory.
• The PIO-USB will be used as a USB host example demo for printing HID reports received from the device.

Core1 setup to run TinyUSB host with pio-usb
Device attached, address = 1
Device 1: ID 05ac:0256
Device Descriptor:
  bLength             18
  bDescriptorType     1
  bcdUSB              0110
  bDeviceClass        0
  bDeviceSubClass     0
  bDeviceProtocol     0
  bMaxPacketSize0     64
  idVendor            0x05ac
  idProduct           0x0256
  bcdDevice           0310
  iManufacturer       1     CX
  iProduct            2     2.4G Wireless Receiver
  iSerialNumber       0     
  bNumConfigurations  1
TinyUSB Dual Device Info Example

03-MicroSD

Demo

• Insert the SD card and run the demo to write data to the SD card.

Hello, world!
V2-Version Card
R3/R7: 0x1aa
R3/R7: 0x40ff8000
R3/R7: 0xc0ff8000
Card Initialized: High Capacity Card
SD card initialized
SDHC/SDXC Card: hc_c_size: 30475
Sectors: 31207424
Capacity:    15238 MB
Goodbye, world!

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