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USART

Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.

We found 101 threads matching "usart"

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The most relevant threads are listed first

How accurate/tolerant is the PIC USART clock rate?

pomerado@hotmail.com - 13:23 18-08-06
I am looking at a design which uses a PIC18F8520 whose USART is connected to a PC serial port running at a fairly high data rate. I am also looking at the design of a serial port instantiated in an FPGA connected to the same data stream in an RS-485 network. Having to deal with the internal de...How accurate/tolerant is the PIC USART clock rate?

USART design consideration

tguclu - 06:50 17-07-07
Hi everyone ,i'm new to group. In my project i need to use 3xUSART ports in order to build a SDLC network. USART ports will function as the phy of SDLC as V.24 Anyway , this is not the point. Each USART will work at 64kbps. So there is a network traffic of almost 192 kps. The problem ise my ...USART design consideration

Re: Strange behaviour in PIC18 interrupt

Richard H. - 21:43 14-01-05
Interesting one... I don't know PIC in depth, but here are some obervations... * I see you are using 8-N-1 in the screenshot, so this isn't a clock slip / parity failure, or you'd see garbage. It'd seem the USART is not sending at all. * The values keep incrementing, so clearly the ISR ...Re: Strange behaviour in PIC18 interrupt

PIC P18F4550 USART Receive Problem

08:00 25-06-07
Hi, I'm using the Microchip PICDEM board to test USART on the 4550 PIC. I'm using the default settings and the test code to tx/rx data via USART. I can Tx data but Rx doesn't work at all. I've tried all routes to get it working - any ideas? Is there any pins I need to set up although I've a...PIC P18F4550 USART Receive Problem

PDC w/ USART

jgoshorn - 10:25 09-07-05
Hello All, I am implementing hardware handshaking with USART on AT91RM9200 board (24.6.3.12 in data sheet). I need to make RTS signal orignating from CP drop to allow the remote device with which the CPU is communicating t transmit information to the CPU. The data sheet states that the USAR ...PDC w/ USART

Re: Simultaneous use of USARTs and SPI on ATmega64

Mark Borgerson - 13:46 18-02-05
In article , none@none.com says... > > "Anon" schreef in bericht > news:W7OdnYg8audYbojfRVnyuQ@giganews.com... > > > > "Meindert Sprang" wrote in message > > news:111bpdu5eksmpd6@corp.supernews.com... > > > "Anon" wrote in message > > > news:9c2dnfgdk6d3RojfRVnyr...Re: Simultaneous use of USARTs and SPI on ATmega64

Atmega8 Sleep mode doesn't work with USART

02:21 20-07-05
Hi. I'd like to use sleep operation with USART but when I use USART with sleep operation, the system was crashed. my code like this. #include #include #include #include void Uart_Put_Char(unsigned char data) { while ( !( UCSRA & (1 < ...Atmega8 Sleep mode doesn't work with USART

USART microcontroller communication

ahmed.sharifi@gmail.com - 15:02 20-02-06
Hello all, Consider the atmega48 microcontroller by Atmel corp. I want to connects its USART to my PC. Basically i want the microcontroller to talk to to computer. How can i do this? 1. Using a serial port? 2. Can a build my own PCI/ISA card for the pc so that it can read from the uC ...USART microcontroller communication

Re: USART Transmit Issue

karthikbalaguru - 04:18 29-11-07
On Nov 28, 11:43 pm, Ted wrote: > You might want to try a delay between initialising the USART and > starting to write to it. Will it need such a time between initalizing and starting to write ? Strange :(:( What could be the possible reasons ? Any ideas ? > The fact that it is outpu...Re: USART Transmit Issue

AT91RM900 USART problem

06:15 11-04-06
We have been developing code for the AT91RM9200 and have found problems with the UART when running the USART 1.5% slower than the selected boaud rate. A natural consequence with certain clocks and the available divisors available. The problem is that framing errors are not correctly detected. i...AT91RM900 USART problem

USART, setting of TRIS register needed (PIC 16F-types) ?

Stef Mientki - 13:22 20-05-06
I'm a little bit confused about the TX and RX pins in UART mode. I checked several PIC types: If you read the text carefully, you will read several times: "bit SPEN () and the TRIS register have to be set in order to configure the TX and RX pins as the USART" Now look at the schematics of ...USART, setting of TRIS register needed (PIC 16F-types) ?

Smart Card Connection to ARM Microcontroller

madhurag - 09:14 11-07-07
Friends, I am a newbie to the world of embedded systems. So please bear to read this long message. I have a at91sam9261ek in which I have successfully ported u-boot and linux (after compiling their source code which I have downloaded from Linux Link by TimeSys). Now i wish to connect a smart c...Smart Card Connection to ARM Microcontroller

uC favorites?

Bob Stephens - 16:40 27-04-04
I am currently using a Silicon Labs (Cygnal) 8051 derivative -C8051F060 - in an prototype embedded design. I am looking for a replacement device for future revisions which would have most or all of the following: 8 or 16 bit architecture 4 or more 8 bit +/- 25 mA ports 2 16 bit 1 Msps A/D 2...uC favorites?

Nucleus PLUS sdc.c usart tx buffer seems always full

aclassifier - 07:24 14-06-07
We have a case where we 1) some times loose send character on the usart and now 2) Nucleus _always_ sees a full tx buffer (after sending a "random" number of characters first - several KB) and does a NU_Sleep(1) in a loop forever. This seems to hog the machine. We have sdc.c version "Nucleus PL...Nucleus PLUS sdc.c usart tx buffer seems always full

Re: Review my resume. Please.

Gary Kato - 15:51 21-08-04
> If they don't understand USART chances are they don't understand UART > either. > I doubt if the recruiters/Human Resources people understand much at all, but they pattern match. If the employer is looking for UART experience, then they will look for UART. They might be able to infer that ...Re: Review my resume. Please.

USART, single master (8051), multiple slave (PIC16F876) - suggestions

Bill Davy - 06:06 29-09-06
We built a machine with a CAN bus connecting modules to a CAN board in a PC. We had a useful little Laser Beam Power Meter [LBPM] board based on a PIC16F876 attached to CAN. It had a debug serial port. S/w was developed on MPLAB/CCSC C. The next machine used a Cypress FX2LP (based on an ...USART, single master (8051), multiple slave (PIC16F876) - suggestions

AT91SAM7S256-128-64-321 USB and USART usage (clocking)

jaac - 17:08 06-04-06
Hi, I want to know if it is possible to use at the same time the USB and UART peripheral on the AT91SAM7S256-128-64-321, with zero error on the UART part. The clocking scheme is what concerns me. As far as I understand you have the main clock MCK from an external crystal (or clock signal). ...AT91SAM7S256-128-64-321 USB and USART usage (clocking)

AT91SAM7S256-128-64-321 USB and USART usage (clocking)

jaac - 17:08 06-04-06
Hi, I want to know if it is possible to use at the same time the USB and UART peripheral on the AT91SAM7S256-128-64-321, with zero error on the UART part. The clocking scheme is what concerns me. As far as I understand you have the main clock MCK from an external crystal (or clock signal). ...AT91SAM7S256-128-64-321 USB and USART usage (clocking)

Re: Why should I (not) use an internal oscillator for 8-bit micros

Sergio Masci - 21:35 15-08-04
Neil Bradley wrote in message news:10hvisv6ucimkf3@corp.supernews.com... > "CBFalconer" wrote in message > news:411FC1AD.91751819@yahoo.com... > > Neil Bradley wrote: > > > "CBFalconer" wrote in message > > > > Neil Bradley wrote: > > > > > "Schwob" wrote in message >...Re: Why should I (not) use an internal oscillator for 8-bit micros

Unusual USART behaviour on AVR AT90CAN128

Rav - 07:50 12-07-07
Hi, I have found some unusual USART behaviour when i was trying to send characters from USART1 of my AT90CAN128 to the PC terminal. Below is the code that i have been using for the same. The problem is, what i am getting on my PC hyperterminal is some garbage. I did some calculations and foun...Unusual USART behaviour on AVR AT90CAN128

Pic18f252 usart problem

PigPOg - 09:13 11-07-08
Hello all I'm probably overlooking the obvious but I can't seem to get the USART on the 18F252 working. I've tested Port RC6 to see if anything is being transmitted but the output remains high. I suspect that I haven't configured the associated registers properly or the Test Routine is wrong...Pic18f252 usart problem

Re: Choice between CMOS 4099 or 74HC259

MM - 07:22 29-10-05
antedeluvian wrote: > MM, > > The way I understand your question is that you want to replace a 74HC259 > with a 4099. If this is the case, then you should know that aside from > anything else, they are not pin compatible. Secondly the Clear function > appears to be inverse between the de...Re: Choice between CMOS 4099 or 74HC259

how to initializatize/re-configure usart?

bcincin - 07:44 28-09-07
Hi. I want to change reset uart and change baud rate with an interface (combobox) on windows. At the beginning default baud rate is 2400. ME2 |= UTXE1 + URXE1; // Enable USART1 TXD/RXD UCTL1 |= CHAR; // 8-bit character UTCTL1 |= SSEL0; // UCLK = ACLK UBR01 = 0x0D; // 32k/2400 - 13.65 ...how to initializatize/re-configure usart?

Re: Need uC (ARM preferably) with USB device port, internal FLASH and USB device.

Ulf Samuelsson - 02:34 04-02-05
> > I'm looking for uC that has an external bus interface, > > on-board flash and USB device simalar STMicroelectronics STR710. > > Package - 144PQFP / 100PQFP or less. > > May be anybody now another chip with USB device port, internal flash. > > Two chip solution also is possible. >...Re: Need uC (ARM preferably) with USB device port, internal FLASH and USB device.

Re: Microchip PIC 18f8722 USART2 Interrupt Problem

Anthony Fremont - 11:41 25-01-08
also posted to alt.microcontrollers.8bit gary.ireland@ams-neve.com wrote: > Hi, > > Microchip PIC 18f8722 USART2 Interrupt is not working - I have USART1 > working fine with interrupts but cannot get interrupt on usart2 - the > RC2IF interrupt flag never gets set although data is coming i...Re: Microchip PIC 18f8722 USART2 Interrupt Problem

Re: Need DSP recommendation

Paul Keinanen - 02:52 08-01-04
On 5 Jan 2004 10:56:46 -0800, ragarwal@fit.edu (Rahul Agarwal) wrote: > My application is the following. The processor is connected to an > analog sensor. It needs to sample the sensor to a 10-bit digital value That should not be a problem, so I do not think that you need a DSP. > and tr...Re: Need DSP recommendation

Re: PIC usart problem

techie_alison - 19:15 29-06-06
wrote in message news:1151333610.439573.258960@u72g2000cwu.googlegroups.com... > Hi everyone, > I am having a big trouble with my PIC's serial communication. I have > codes like these: Try following the examples on www.piclist.com and then expand on them. :) You can get some pret...Re: PIC usart problem

Re: msp430 beginner

Tim Wescott - 15:38 06-04-08
On Sun, 06 Apr 2008 09:32:39 -0500, Grant Edwards wrote: > On 2008-04-06, darknightx wrote: > > > I recently bought a msp-fet430u80 kit form TI and installed MSPGCC . Im > > used to make desings with PICs from Microchip but this TI MCU for me is > > really new and I think that I requ...Re: msp430 beginner

New to PIC

2Penny - 01:56 30-11-04
Hey Folks: I got a PIC DEMO 2+ board & ICD2 recently. I've used 68k and x86 asm before and now need to find out about PIC asm. I've got a program that gets the USART going in a PIC 18C452, but I have an 18F452. How much damage would it do if I just changed all the references in the asm cod...New to PIC

Re: Which microcontroller do I need?

Jay Maynard - 12:34 28-07-07
On Jul 28, 10:39 am, Petter Gustad wrote: > Freescale M5223x and the M52235EVB dev board. I'm using a GNU > toolchain=B9 under Linux. Haven't tried MacOSX. Unfortunately there are > no free drivers available for the USB FLASH programmer that I know > of. That looks like a very good cho...Re: Which microcontroller do I need?

Low power USB Microcontroller

10:11 10-07-07
I wonder if anyone can help, I am looking for a USB Microcontroller with the following specifications USB+USART+SPI , possibly not need SPI USB slow or fast, RS232-300-19200 baud min, prefer upto 115200. When the USB is in suspend or not connected Microcontroller needs to run at low speed suc...Low power USB Microcontroller

Re: ATmega8535 and USART post-initialisation delay required?

Michal Machowski - 08:21 16-03-05
Użytkownik "Joe" napisał w wiadomości news:d11ulf$umv$1@news7.svr.pol.co.uk... > correction: > with the short delay, it is CORRECT 20% of the time. > > > I also needed delay when slave, (ATmega32) responsed to master, ( PC ) by rs485 wire. In my case it was coused by fact that oth...Re: ATmega8535 and USART post-initialisation delay required?

Re: ESD problems with PIC 16F88

Paul Rosen - 14:58 22-11-07
lloydcam@gmail.com wrote: > PIC16F88s. > Sometimes when you touch the socket with your finger, the PIC responds > in a manner suggesting that it has received some random data on the Rx > pin of the USART. The problem occurs much more frequently in cold dry > weather which I know is worse fo...Re: ESD problems with PIC 16F88

Rewriting putchar() on MSP430F149

16:57 14-01-05
I think, that only reasonable way to make terminal connection between MSP430F149 PC, is to rewrite low-level fuction putchar() to use USART and let upper-level functions like printf() to make all the conversions needed. I'm using IAR and/or mspgcc. How do I replace putchar.o in library files...Rewriting putchar() on MSP430F149

Re: RS-485 implementation on Lantronix XPort-485

Frank - 15:13 06-02-07
On 6 Feb., 13:58, "Frank" wrote: > Hi, > > just browsed the manuals for Lantronix' XPort-485 (http://www.lantronix.com/support/documentation.html) and I'm a little bit > confused: Thanks to you all, especially to Jim Beck. I traced back, where I took the wrong direction: Application N...Re: RS-485 implementation on Lantronix XPort-485

Re: Looking for 3 serial port processor

Ulf Samuelsson - 18:39 25-08-04
"Sérgio Correia (Sapo News)" skrev i meddelandet news:412cd782$0$30339$a729d347@news.telepac.pt... > Does anyone know such a uP? > > Thanks. > > * ATM55800A. - 3 UARTs * AT91RM3400 - 5 UARTs * AT91RM9200 - 5 UARTs * AT94K05/10/40 (with the right confiuration in the FPGA)...Re: Looking for 3 serial port processor

Re: Profiling tools for Microchip?

Knopf - 12:24 20-02-06
> > Does anyone know software profiling tools for microchip PICs? Can I > > hack this together with an ICD2 or do I really have to get an ICE? > > I'd recommend an I/O line and an oscilloscope. Ok. That's a feasible approach, however, the advantage of standard profiling software is, t...Re: Profiling tools for Microchip?

Re: Could PIC handle this?

Noel Henson - 17:46 13-12-04
David wrote: > Could a PIC handle interfacing via rs232 with a GPS unit, and > comparing the location against a list of ~5000 stored positions, and > alerting (LED/LCD) if any points are considered close enough (~1-2km, > using haversine formula, perhaps)? > > I guess the points would...Re: Could PIC handle this?

HELP!! Pleas....PIC16F627a can't make usart receive interrupt work

Anbeyon - 08:39 15-12-06
Hi Can someone take a peek at the code below and see if I have enabled the USART on the PIC16F627A correctly please. All I want to do right now is set up a pic running @ 10MHz to 28800 baud and jump to my interrupt routine when it see a char. I can't make it happen. I have done this lots...HELP!! Pleas....PIC16F627a can't make usart receive interrupt work

help with msp 430 interface and dip-switches

bcincin - 05:00 28-11-07
1- I got a board with dip-switches. How do they work? What do they use for? 2- I'm tring to do a c# interface to change baud rate of msp430 but it does not work properly. I got a blinking led to see if it works fine. The problem is, when i change baud rate, led stops blinkind. When I set change ...help with msp 430 interface and dip-switches
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