- RASPBERRY PI USB SERIAL PORT IDENTIFICATION HOW TO
- RASPBERRY PI USB SERIAL PORT IDENTIFICATION SOFTWARE
There are serial communication protocols that support data transfer of fixed and variable data-packet size. However, it is possible to interface and communicate with hundreds of peripherals/devices using only two, three, or four channels of a serial port. It’s next-to-impossible to interface several external peripherals and devices with parallel ports because it would require several digital input/output (GPIO) pins. Also, embedded controllers/computers may interface with several devices, communicating with them in a single user program. There are many reasons for this.įor one, serial ports involve less complex circuitry and can easily be integrated on a microcontroller or system on a chip (SoC). While general-purpose computers often use parallel ports for data communication because of their high transfer rates, embedded controllers and computers typically rely on serial ports. Where a parallel port uses complex circuitry for data communication, a serial port simplifies data communication by reducing the number of required channels for data transfer. On the other hand, a serial port can transfer data of fixed-units and communicate data of variable size. Additionally, a parallel port can provide high-transfer rates with 1 bit of data-unit on each wire of the parallel data bus and the parallel port. For example, the data may consist of fixed-size units of 8, 16, 32, or 64-bit, etc. Serial ports: data is communicated as a bit-streamĪ parallel port is useful for fast data communication of fixed-size data.
Parallel ports: data is communicated over parallel data linesĢ.
There can be two types of wired communication ports:ġ. The channels (pins) on a device (or component of a device) that communicate data are collectively called a communication port. In wired communication, the data (information) is communicated between two devices over wires. Larger units include kilobytes, megabytes, gigabytes, and so on.ĭata communication between two devices can be wired or wireless. A byte is made up of 8 bits whereas a nibble comprises 4 bits. A nibble or byte is the smallest unit of information. Serial communication refers to the sequential transfer of data over a wire. In this tutorial, we’ll cover the basics of serial communication and review several serial communication options with RPi. The universal asynchronous receiver/transmitter or UART is the most common serial communication protocol used by embedded devices. As an embedded computer, RPi is capable of digital input, digital output, PWM, and implementation of various serial communication protocols (such as UART/USART, I2C, and SPI). The PWM output can also be used for other applications, such as for speed control of a DC motor or controlling a servo motor.
RASPBERRY PI USB SERIAL PORT IDENTIFICATION SOFTWARE
We also showed how software PWM can be used to fade an LED.
RASPBERRY PI USB SERIAL PORT IDENTIFICATION HOW TO
In the previous tutorial, we learned how to generate analog output in the form of software PWM when using Raspberry Pi (RPi).
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