Enter the Python program directory and run the command ls -l.The test program of all screens can be called directly by entering the corresponding size.ĭepending on the LCD, one of the following commands should be entered:.Please go into the RaspberryPi directory (demo codes) first and run the commands in the terminal. Open the Raspberry Pi terminal and run the following command:
If it does not appear, it means that there is an installation error # Run gpio -v and version 2.60 will appear. #Bullseye branch system uses the following command: If it does not appear, the installation is wrong # Run gpio -v and version 2.52 will appear. #For Raspberry Pi systems after May 2019 (earlier than before, you may not need to execute), you may need to upgrade: # For more information, please refer to the official website:
#Raspberry pi 2 spi arduino install
configure & sudo make & sudo make check & sudo make install #Open the Raspberry Pi terminal and run the following command Please make sure the SPI is not occupied by other devices, you can check in the middle of /boot/config.txt. Open the terminal, and use the command to enter the configuration page.Ĭhoose Interfacing Options -> SPI -> Yes to enable the SPI interface.PS: If you are using the system of the Bullseye branch, you need to change "apt-get" to "apt", the system of the Bullseye branch only supports Python3. Working with Raspberry Pi Enable SPI interface SPI0 is commonly used, in which CPHL = 0, CPOL = 0.
#Raspberry pi 2 spi arduino serial
However, CPOL has little effect on the transmission.ĬPHA determines whether data is collected at the first clock edge or at the second clock edge of the serial synchronous clock when CPHL = 0, data is collected at the first clock edge. SPI communication has data transfer timing, which is combined by CPHA and CPOL.ĬPOL determines the level of the serial synchronous clock at an idle state. SCL works as the SCLK pins of the SPI interface. SDA: the data pin for transmitting RGB data, it works as the MOSI pin of SPI interface RESX: the reset pin, should be low when powering the module and be higher at other times ĬSX: slave chip selects, when CS is low, the chip is enabled.ĭ/CX: data/command control pin, when DC = 0, write command, when DC = 1, write data Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirements. This LCD uses a four-wire SPI communication interface, which can greatly save the GPIO port, and the communication speed will be faster. The LCD supports 12-bit, 16-bit, and 18-bit input color formats per pixel, namely RGB444, RGB565, and RGB666 three color formats, this demo uses RGB565 color format, which is also a commonly used RGB format.įor most LCD controllers, the communication mode of the controller can be configured, usually with an 8080 parallel interface, three-wire SPI, four-wire SPI, and other communication methods. The color of the wiring in the picture is for reference only, and the actual color shall prevail.) The 2inch LCD uses the PH2.0 8PIN interface, which can be connected to the Raspberry Pi according to the above table: (Please connect according to the pin definition table. Use the pin header or PH2.0 8PIN interface, you need to connect according to the following table: Please connect the LCD to your Raspberry Pi by the 8PIN cable according to the table below: Interface Description Raspberry Pi hardware connection
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