1.**GPIO pin connection: * *
GPIO (general input and output) pin is one of the common hardware connection methods in embedded systems. By connecting external devices (such as sensors, light emitting diodes, etc. ) to the GPIO pin on the embedded board, which can realize digital signal transmission between hardware. Pay attention to the level of the pin and the signal direction when connecting.
2.**UART serial connection: * *
UART (Universal Asynchronous Transceiver Transmission) serial connection is a way of data communication through serial port. Embedded systems usually provide UART interface, which can transmit data between development boards and other devices (such as computers, sensors, etc.). ) by connecting a serial line. You need to make sure that the parameters such as baud rate and data bit of the connection cable are set correctly.
3.**I2C or SPI bus connection: * *
I2C(Inter-IntegratedCircuit) and SPI(SerialPeripheralInterface) are two common serial communication protocols, which are used to connect multiple devices to the same bus. By connecting peripheral devices (such as display screen, sensor, etc.). ) to I2C or SPI bus, which can realize parallel communication between multiple devices and improve the scalability of hardware.
The choice of these hardware connection methods depends on the specific application scenarios and requirements. When connecting, be sure to carefully consult the relevant hardware manual or development board documents to ensure that the hardware is connected correctly, and understand the function and electrical characteristics of each pin to avoid damaging the hardware or causing unnecessary problems.
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