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en:iot-open:embeddedcommunicationprotocols2:uart [2023/06/25 21:32] – ktokarz | en:iot-open:embeddedcommunicationprotocols2:uart [2024/05/27 11:26] (current) – ktokarz | ||
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- | ==== UART ==== | + | ====== UART ====== |
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+ | UART name is an abbreviation of Universal Asynchronous Receiver Transmitter. It is one of the most often used communication methods, traditionally named serial interface or serial port. In contrast to previously presented interfaces, UART uses direct point-to-point communication. | ||
+ | UART is the communication unit implemented in microcontrollers rather than the communication protocol. It sends the series of bits via the TxD pin and receives a stream of bits with the RxD pin (figure {{ref> | ||
- | UART name is an abbreviation of Universal Asynchronous Receiver Transmitter. It is one of the most often used communication methods, traditionally named serial interface or serial port. In opposite to previously presented interfaces, UART uses direct point-to-point communication. | + | < |
- | UART is the communication unit implemented in microcontrollers rather than the communication protocol. It sends the series of bits via TxD pin and receives a stream of bits with RxD pin. It is important to remember that pin TxD from one device should be connected to pin RxD in another device. This is a general rule but please always check the documentation for some non-standard markings. | + | {{ en: |
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- | To properly transmit data the speed of transmission, | + | The transmission |
- | Start and stop bits are used to keep the synchronization between | + | Start and stop bits are used to synchronise |
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- | {{ en: | + | {{ en: |
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- | UART, namely Serial Port is used in many modern microcontrollers to upload the executable program, debug, and as the standard input/ | + | UART, namely Serial Port, is used in many modern microcontrollers to upload the executable program, debug, and as the standard input/ |
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- | Many modern PC computers (except industrial ones) do not have a serial port exposed | + | Many modern PC computers (except industrial ones) do not have a serial port exposed, so USB to serial converters must be used. Some development boards have a USB-serial converter on board (e.g. Arduino Uno, NodeMCU, STM Nucleo, etc.) |
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- | Even if a PC computer has a serial port it is usually compatible with the RS-232 standard, which uses the same frame structure but different voltage levels (with opposite zero-one encoding, known as reverse logic). | + | Even if a PC computer has a serial port, it is usually compatible with the RS-232 standard. It uses the same frame structure but different voltage levels (with opposite zero-one encoding, known as reverse logic). |
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