Questions tagged [uart]
A UART (Universal Asynchronous Receiver Transmitter) is a piece of logic that sends and receives data on a serial port.
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Three UART connections to an ATMega328?
I'm looking at the ATMega328p data sheet, and an Arduino Pin diagram, trying to determine if the chip can support three UART connections. I see that PD0 and PD1 are "USART" In and Out. So does that ...
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What causes a UART device to continuously repeat its last transmission?
I just got this awesome Bluetooth module in the mail. I connected power and UART pins, and tied pin 34 to +3.3v with a 1k resistor (that puts the module into AT command mode rather than pass-through ...
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RS-232 Buffer circuit
I wanted to sniff communication between two RS232 devices. This link presents a simple solution but I want to make sure that my 'sniffer' does not load the communication link.
To that effect, I was ...
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Can the Arduino be used to "spy" on a UART connection between two devices?
I have a need to install an Arduino (actually just the IC) into existing hardware to enhance functionality.
What I would like to do is connect the Arduino so that it "spys" on the I/O lines between ...
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Software to create timing diagrams
In my professional life, I sometimes need to create timing diagrams for protocols: UART, SPI, etc. However, I can't find any good programs available. What programs can be recommended for this and what ...
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Anything special I need to know about RS232 & FT232R?
I'm trying to interface an XSens IMU with my computer, and I'm running into interesting difficulties. The IMU has an RS232 connector that just uses the pins VCC, GND, TX, RX, nothing else. The SDK ...
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How do I calibrate an AVR's RC oscillator using the UART?
I would like to set my AVR's OSCCAL for proper RS-232 communication using the other end's transmission as the calibration clock, without having to solder the RX pin to a timer pin. Is there firmware ...
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USB-to-UART bridge: protocol mapping?
I was wondering how does the protocol mapping work between the USB side and the UART side when dealing with the Microchip MCP2200?
What sort of USB transfer type is used?
bulk?
isochronous?
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RFID Reader UART
Was wondering if someone could give me a hand with a project that I am undertaking. I have searched forums high and low and am yet to find the information to solve my problems.
Basically I have an ...
Bash
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It's been more than 10 years (since I designed hardware with RS-232), and we're still using RS-232?
Are there any alternatives to this ancient yet still popular way of communication?
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Injecting a communication signal over DC power supply lines
I'd like to be able to daisy chain multiple devices using just the power supply wires and then inject a communications signal over the power lines to turn it into a half duplex network.
Are there any ...
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FTDI FT2232H (USB <-> UART) baud rates?
Anyone used one of the FT2232H chips from FTDI?
Specifically, how do you figure out the permissible baud rates?
The data sheet is kind of vague, and I have to pick something in the 1-3 MBaud range ...
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Minimum ATMega328 speed with UART
I am looking at designing a low-power project that will have an ATMega328 running at a low speed for lower power consumption.
The current plan is to have the UART hooked up to a RF Link Receiver for ...
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