A UART (Universal Asynchronous Receiver Transmitter) is a piece of logic that sends and receives data on a serial port.

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24 views

UART: no input while connecting to some hosts [on hold]

I have Android tablet with configured UART (console=ttyS0,115200 in /proc/cmdline). When I connect to it from my workstation it ...
1
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2answers
39 views

Serial Communication Rx ISR logic design

If im not wrong, an ISR is supposed to do minimal processing when it receives a data serially(via UART). Im planning on implementing such a protocol for communication between 2 systems via uart. This ...
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1answer
29 views

How to use UART port for sending status in verilog

I am developing various verilog modules with state machine for a fpga board. When i have done simulation of the modules i have used "$display" to get what is happening in the module or otherwise the ...
0
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1answer
69 views

I can't get out from interrupt driven serial communication

program works correctly but after receiving '#' it has to come out from while loop and print "Exit" on lcd but it doesn't.program still in while loop. ...
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0answers
31 views

How to use hc-05 with pic32

I want to use Hc-05 bluetooth module with my pic32 controller for communicating with other bluetooth devices. I want to test the hc-05 module with my pic32 controller. I have made the hardware ...
2
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3answers
61 views

What happens on STM32 when multiple (UART) Interrupts are triggered at the same time? is there an interrupt stack?

I'm implementing a uart daisy-chain communication scheme with a Cortex M4. When a node receives a byte over one UART, an interrupt is generated (RXNE) and the byte ...
0
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2answers
54 views

UART connection using PL 2303. Weird characters

I took a while to errors when playing movies from the player (lock screen, reboots). After updating the firmware, still not working.( Same reboots, lock screen) I open the media player and I have ...
0
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1answer
55 views

RS422 to RS422 and RS232

Is it good to use one UART interface on MCU, RX_UART for receiving data from RS422 receiver and TX_UART for transmitting the same data to the RS232 and RS422 transmitter? I am trying to use UART as ...
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46 views

Single-Chip Ethernet (MAC-PHY) via UART solution [on hold]

I am searching for a low cost solution to equip an ARM based processor with an additional ethernet interface (MAC + PHY) over a UART connection. In theory this should be possible to access over PPP ...
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1answer
53 views

PICDEM board and Linux connection through serial

TL;DR: I can open screen or putty session in terminal to the /dev/ttyUSB0, but characters ...
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0answers
36 views

Voltage-level traslation from 3.3VCMOS to 2.8VCMOS

I'm developing a PCB GPRS Module for ZYBO from a Telit GL865 GSM/GPRS module as a base. The issue is to transform the high levels for the UART comunication between them. ZYBO (3.3V CMOS) has an ...
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1answer
107 views

What's the meaning of “x” in RxD and TxD of UART? [closed]

RxD means Receive Data. TxD means Transmit Data. Where the "x" come from?
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2answers
79 views

Converting serial UART from wire to wireless

I have a device with 4 pins (2 pins RX, 2 pins TX), operating at 9,600 Baud. I want to send the data via an HC11 wireless module which has only 1 RX and 1 TX pin. Is this possible? Or can i merge ...
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5answers
135 views

Baud rate vs. Bit rate

When we initialize a serial communication, we usually have to set the baud rate (e.g. 115200) I notice that many people assume that 115200 means 115200 bits per second. However, each baud(signal ...
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1answer
42 views

Can i directly connect a gsm shield to a computer without using arduino?

Ok, i've bought a gsm900 in alexan, and what i bought was a gsm shield thinking that it is really just the same only that shield can be placed directly in an arduino. The problem is that, im trying to ...
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1answer
94 views

PIC32mx UART to Bluetooth RN4020

I am trying to establish an UART comunication between PIC32MX110F016 and a RN4020 Bluetooth Module. I am new on PIC32mx but I think I am doing enough code/configuration for them to comunication but ...
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0answers
23 views

communication gets disconnected on msp 430f54x

My msp gets disconnected while running a routine that is using port 10 for one-run 4X4 keypad. Is there any connection between the two? I've already tried using different computers and serial ports ...
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1answer
47 views

Can't transmit char on msp430f54

Trying to send a character with UART but it just refuses to work. my code: ...
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1answer
44 views

Sending multiple electrical signal to PC via Serial port

I am doing a project in which I want to control small toy car using EMG signals from my forearm. I want to send 4 electrical signals to the computer. I have made a processing circuit which contains ...
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1answer
71 views

Fingerprint Reader on Pic32mx

I am struggling in trying to put a UART Port working (no flow control and no parity bit) in a PIC32MX in order to comunicate with a Fingerprint for too long, so I decided to get back to you guys. I ...
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2answers
93 views

How to simplify UART interrupt handlers on Tiva TM4C with SIMcom 900

UARTIntHandler0 interfaces to the USB UART for debugging. UARTIntHandler1 interfaces to the SIM900 GSM module. The purpose of ...
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3answers
130 views

UART communication not working with higher baud rate values?

I have a PIC32MX795F512L which is connected to 8MHZ crystal. UART program is working with ...
4
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3answers
108 views

UART, minicom and ASCII

I am trying to send my name (Ziga) through my micro-controller UART periphery to my PC. GND, Tx, Rx lines from micro-controller are directly connected to the UART-USB converter CP2102 which is pluged ...
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18 views

Petalinux zynq uart connection

I have installed petalinux on my zynq board and I want to connect uart to MIO. I have checked vivado schematic (somebody else has done it) and the uart pins are not connected. If I connect it in ...
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2answers
63 views

UART is acting weird

I programmed UART3 peripheral on LPC4088 to send a single unsigned character posiljka over Tx line. This is done by continuously copying this character into the ...
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2answers
94 views

UART signal quality and ESD protection

Our circuit has its UART port connecting with a central control board. And I am thinking on the ESD issues. The UART runs at 56700 baud rate. The UART communication is between two stm32f407 chips. ...
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3answers
156 views

Transmitting PWM binary at 400kbps (or 800kbps)

I need to send a string of bits to a chained set of RGB LEDs, each of which have their own controller IC. The datasheet for that IC, the WS2811, is here. The protocol is quite simple: each bit, both ...
2
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3answers
110 views

Trying to flash STM32f030f4 (ARM, Cortex M0) - what is proper wiring?

I've got STM32F030F4 chips from shop, made a small breadboard adapter for it and tried to connect to its built-in bootloader via USART1. I've failed and I'm somewhat bewildered about wiring. My ...
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0answers
32 views

Getting [VTERM] Parity Error when simulating USART connection in proteus

I'm trying to simulate USART connection between atmega32 and a virtual terminal. But when I push the button to start the transmission, I always get [VTERM] ...
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1answer
32 views

Not able to perform operations based on the data received to MCU through UART?

I have been trying to do a simple operation based on the data byte received by the MCU(pic18F) from the PC terminal through UART. The operation is turning ON an LED depending on the content of the ...
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0answers
142 views

UART reception problem when SysTick Interrupt is enabled

I'm using STM32F411RE-Nucleo board and generating a project with Cube MX for System Workbench. The problem is that, HAL_UART_Receive function doesn't receive input ...
2
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1answer
21 views

LPC1110 confusion about default system clock and uart baud rate

I'm trying to get acquainted with ARMs on example of LPC1110 device. And there is some confusion about selecting baud rate for UART. I suppose it is running at ...
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4answers
128 views

Connecting SIM900 to STM32F4 Nucleo

I'm trying to connect Simcom SIM900 to Nucleo-F411RE using the following configuration for USART1: ...
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1answer
58 views

Buggy VHDL UART receiver

I'm trying to get a simple UART receiver working and am close but I'm receiving slightly off values (some bits are shifted a couple places from where they should be). Based on this answer I tried ...
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1answer
50 views

How to avoid garbage values received in UART communication

I am new to the embedded programming. I am doing a UART communication in PIC32MX795F512L MCU. I have somehow managed to transmit and receive data but not able to ...
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1answer
144 views

STM32 UART reliability with high baud rate

I am using STM32F4 (bare metal with HAL library) as an HTTP Server. I don't implement TCP layer, because that is done for me by the WiFi232 D2 module - all I receive in the uC through UART is a string ...
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1answer
43 views

AVR Atmega164P UART / ISP programmer problem

I am having a problem with the USART on an Atmega164P. When the ISP programmer is connected everything works fine. If I disconnect the programmer then all I get is garbled serial and the chip won't ...
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1answer
33 views

XCTU for programming?

I am new to Xbee and XCTU software and I wanted know if it is possible to use XCTU to send a "programmed sequence". By that I mean, send something, wait 10 seconds, if receive this thing send this ...
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1answer
75 views

How to generate UART interrupt for GPIOs?

I am using PIC32 and I have few inputs. I want a UART Tx Interrupt to fire whenever any input becomes HIGH. I have somehow manged to write code for UART tx and rx ...
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4answers
92 views

How to handle polling method in micro controllers.?

I am using PIC32MX795F512L Micro Controller. I need to develop an application where 4 led's connected to pins of controller will blink continuously at a rate of 1sec and there are 15 inputs ...
0
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2answers
71 views

Intel 8051 UART mode 0 doesn't work in Proteus (clock impulses on TXD occur constantly, MCU recieves bytes itself)

I think that I've read everything about 8051's UART but I can't understand what goes wrong even in this simpliest example. According to literature in mode 0 MCU transmits byte only when we write it ...
2
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2answers
114 views

UART - receive buffer

I want to receive and send packets via UART. The problem is that I don't want to immediately react on a received byte but on a certain sequence. That sequence consists of 4 UART bytes and shall only ...
0
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1answer
80 views

UART communication bet controller and smart card reader over UART

I am newbie to UART interface. My query is, in my application, smart card reader is interfaced with controller LPC2138 over UART interface. Connection scheme: uP ( TxD) --> reader (RxD) uP ( RxD) ...
25
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8answers
2k views

When should one switch from ASCII to advanced serial protocols?

All my microcontroller devices that communicate with the PC via UART use ASCII strings for sending commands and receiving data (as implemented in Arduino). That's what I learned when I began digging ...
2
votes
2answers
144 views

Error reading data through UART using peripheral library in PIC32?

I am trying to receive data using UART. I am using PIC32MX795F512L Micro Controller and using 32 bit peripheral library, so I using functions like putsUART or ReadUART1 Now in the code : ...
2
votes
1answer
36 views

PIC16F1788 - how can I reliably determine when EUSART byte transmit is complete?

I have an application where I send semi-duplex messages on an RS485 bus. My slave devices on this bus are normally in receive-mode, listen for commands, and when they get a command they switch to ...
1
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2answers
70 views

Strange issue on Raspberry Pi UART (with FTDI USB <--> RS-232 adapter)

I'm trying to establish a high speed UART communication on Raspberry Pi board. Since internal UART is not quite good at 1+ Mbaud, decided to use FTDI adapter (based on FT232RL chip) instead. I've ...
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1answer
98 views

UART - getting gibberish data from MAX232 with PIC16F877A mcu

I have created a serial communication between my laptop and 16F877A mcu. I have used MAX232EPE IC as level converter also. According to my code If I send a character to the MCU, MCU will return a ...
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0answers
37 views

Xbee UART small signal drop

I have designed a circuit for wireless communication using an Xbee 900HP and a PIC16F1847 using UART. The circuit works and successfully sends data over UART, however when I scope the UART RX and TX ...
3
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214 views

USB to TTL (CH340G) and maybe Logic level converter to program chips

Since i have a bunch of Atmega328p-pu(5v), Attiny85(1-5v), ESP8266(3.3v) & Raspberry's(3.3v) it was time to get: A USB to TTL Logic level converter Now before buying that stuff i read about ...