Luckfox Pico RV1103【Tutorial on how to use UART】

The LuckFox Pico has three serial ports: UART2, UART3, and UART4. Among them, UART2 is the debug port.

The LuckFox Pico Plus has four serial ports: UART2, UART3, UART4, and UART5. Among them, UART2 is the debug port.

】Performing serial port testing using the GPIO sysfs interface：

(The following operations need to be performed in the terminal of the Pico development board.)

1] View serial port：

root@linaro-alip:/home/linaro# ls /dev/ttyS*

/dev/ttyS3 /dev/ttyS4

##The serial port devices here are UART3 and UART4

2] Use the “stty” tool to query the serial port communication parameters：

linaro@linaro-alip:~$ stty -F /dev/ttyS3

speed 9600 baud; line = 0;

-brkint -imaxbel

##The default baud rate is 9600

3] Modify the baud rate, where ispeed is the input rate and ospeed is the output rate：

stty -F /dev/ttyS3 ispeed 115200 ospeed 115200

4] Disable echo：

stty -F /dev/ttyS3 -echo

## Disabling echo refers to the situation where the characters entered in the terminal or serial communication are no longer displayed on the terminal.

5] Operation process screenshot:

】Communicating with a Windows host：

Connect one end of the serial port module to the computer, and the other end to the physical pins 18 (GND), 19 (UART7_TX), and 20 (UART7_RX) of the LuckFox Pico.

Download and open PuTTY (or any other serial port software), select the serial port, and set the baud rate (default is 9600, please adjust it according to your actual modified value).

Execute the following command on the terminal of the development board to write the strings “Hello” and “world!” to the terminal device file using the echo command:

echo Hello > /dev/ttyS3

echo "world !" > /dev/ttyS3

The serial port debugging assistant on Windows will receive the content:

】Test the built-in sample program of the official SDK：

1] Download SDK&Compiling test example code or download Compiled example code.:

SDK GitHub Download

2] Transfer the test example code file to the development board.

(The following operations need to be performed in the terminal of the Pico development board)

3] Run the test sample program:

chmod 777 ./luckfox_uart_test

## Grant executable permissions to the file

./luckfox_uart_test 3

##The parameter 3 in the example represents UART3.

4] Open the serial communication device to receive data:

TAG： Banana Pi Sipeed Tang Primer 25K GW5A RISCV FPGA Development Board Dock SDRAM GW5A-LV25MG121 Retro Game linux JETSON NANO MINI GC9107 Ra Raspberry Pi 1.44inch LCD display HAT 64MP Camera 5inch RS232 to RJ45 Arduino 0.96inch RGB OLED Refractive Prism Raspberry Pi Pico 2 RP2350 1.64 inch AMOLED Development Board Display TouchScreen 280x456 QMI8658 IMU QSPI Luckfox Pico Zero RV1106G3 SD WiFi6 Audio eMMC-8G RAM-256MB Raspberry Pi UPS ESP32 Development Board C3 1.28 inch Round Rotary LCD Smart Screen 1.28inch Knob Display 240x240 LVGL for Arduino RP2040 DeepSeek XiaoZhi AI Voice Chat ESP32-S3 All-in-One-PCB-Kit N16R8 WROOM-1-N16R8 DevKitC-1 Development Board Raspberry Pi CM5 IO BASE B Mini Board a Base Development Platform Compute Module 5 IO Board with EEPROM And Encryption chip Raspberry Pi Pico 2 RP2350B 7inch Capacitive TouchScreen 7 inch LCD Display Development Board 800×480 Raspberry Pi 5 PD Activation Module

【First-level Agency】LuckFox Pico Linux RV1103 Rockchip AI Board ARM better than Raspberry Pi Pico

TAG： ESP32-S3 SIM7670G 4G LTE Cat-1 4G GNSS ESP32 C3 Round LCD Electronic EYE 0.71 inch Display Watch Screen GC9D01 160x160 Raspberry Pi 5 Active Cooler Silver Raspberry Pi DSI display 4 inch e Paper HAT+ E Ink Spectra E6 Full-Color 600x400 Screen Display Arduino Raspberry Pi Jetson Nano STM32 Raspber Pi 5 27W Power X1005 Raspberry Pi 5 PCIe M.2 NVMe Dual SSD Pi5 Double 2230 2242 2260 2280 PC Secondary Screen 1.28 inch Round Rotary LCD Smart Screen 1.28inch Knob Display 240x240 Option Touch/No-Touch Serial UART Magnetic Encoder Bus Servo ST3215-HS 20KG.CM High Speed Raspberry Pi 5 UART Speed Sensor Module Milk-V Duo SG2002 Spotpear Digital Photo Jetson Orin 4G/3G/2G expansion board GNSS GPS SIM7600G-H-M.2 3key Keyboard XIAO-nRF52840 Sense BLE microphone Sensor Arduino MicroPython SeeedStudio Tiny SuperMini spotpear Raspberry Pi 5 Case

Luckfox Pico RV1103【Tutorial on how to use UART﻿】

【First-level Agency】LuckFox Pico Linux RV1103 Rockchip AI Board ARM better than Raspberry Pi Pico

Luckfox Pico RV1103【Tutorial on how to use UART】