RS232 using MCC18

Started by Josh in comp.arch.embedded15 years ago 6 replies

I have an application that needs to receive messages via RS232 of variable length and without any control characters or EOF/EOT markers. The...

I have an application that needs to receive messages via RS232 of variable length and without any control characters or EOF/EOT markers. The problem I encounter is that if the application is in a tight loop checking for more characters, it executes fast enough so that the next character has not yet arrived, so it exits. So I thought the only way to be sure that the end of the message has not ...


Demise of the COM port?

Started by Viktor Kesler in comp.arch.embedded15 years ago 100 replies

First it was notebooks, now even desktop PCs are made with just one or no RS232 ports. What's happening? For us embedded engineers who have...

First it was notebooks, now even desktop PCs are made with just one or no RS232 ports. What's happening? For us embedded engineers who have developed uC products that communicate with PCs through COM ports, this situation is getting scary. I know USB/RS232 converters exist, but they're an added cost, very often make rebooting necessary and are often the cause of delays which can cause probl...


RS232 MSP430 help

Started by kung...@gmail.com in comp.arch.embedded12 years ago 3 replies

Hi, I'm new to the world of MSP430 programming. The project I'm currently working on involves communication between an MSP430f149 and a PC...

Hi, I'm new to the world of MSP430 programming. The project I'm currently working on involves communication between an MSP430f149 and a PC using RS232. To start, I'm trying to write a simple routine to echo whatever is sent to the MSP430 via Hyperterminal. However, all attempts to send data have failed. I am using a Max3232 to connect to the serial port of a PC; when I connect the TX and R...


recommendation for 8 port rs232 embedded micro

Started by Anchor in comp.arch.embedded14 years ago 20 replies

We are looking for recommendations for an 8 port rs232 embedded micro. The CPU processing requirement is minimal. Any suggestions?

We are looking for recommendations for an 8 port rs232 embedded micro. The CPU processing requirement is minimal. Any suggestions?


are there reasons why to use SLIP in these days?

Started by jazzisnow in comp.arch.embedded14 years ago 1 reply

hi all i am dealing with a company that should develop a box for me. the box should replace an existing box that is connected via rs232 to a...

hi all i am dealing with a company that should develop a box for me. the box should replace an existing box that is connected via rs232 to a pc. now i have asked them to (instead of going to usb) make a proposal for using ethernet instead of rs232. upfront i described what i have in mind...dhcp support, commands via http, box sending back data in base64-encoded fashion, wrapped with...


Excel-RS232 via Cheapcomm: Where?

Started by Joerg in comp.arch.embedded12 years ago 34 replies

Hello Folks, Since mscomm.ocx for some strange reason will pop a license block unless you also install VB Professional (which most people...

Hello Folks, Since mscomm.ocx for some strange reason will pop a license block unless you also install VB Professional (which most people don't need) I am looking for other methods to communicate with RS232 from Excel VBA, other than directly using the API. Lots of Google searching provided only one alternative, a routine called "cheapcomm". However, none of the download sites from ba...


CAN functional test

Started by Jack in comp.arch.embedded9 years ago 8 replies

Hi, I'm preparing a end of production test for a board. The test will be semi automatic, there will be a guy that push some buttons and...

Hi, I'm preparing a end of production test for a board. The test will be semi automatic, there will be a guy that push some buttons and turn some poti. On the board I have rs232 an CAN communication. For rs232 it's easy, I make a loopback after the tranceiver and just check that the yte I receive is the same that I sent. But for CAN? it's possible to do something similar? The loopback f...


usb to serial port adapter

Started by Nottingham in comp.arch.embedded14 years ago 6 replies

Has anyone seen a device that allows older serial ports only computers to use USB devices? I can only find RS232 to USB adapters turning USB...

Has anyone seen a device that allows older serial ports only computers to use USB devices? I can only find RS232 to USB adapters turning USB ports to RS232. I need the other way around and to work on NT.


Fingerprint scanner w/RS232 interface

Started by S. Harnek in comp.arch.embedded15 years ago 5 replies

Hi group, We have a need for a fingerprint scanner to be connected to our controller, running ROM-DOS, and only having RS232 connectivity...

Hi group, We have a need for a fingerprint scanner to be connected to our controller, running ROM-DOS, and only having RS232 connectivity available. The idea is for staff to id themselves as part of a security protocol to initiate critical processes. The fingerprint ids to match are relatively low, about 10 to 15 at most, and some storage space on the controller can be provided. Anyon...


wiegand protocol

Started by Ali in comp.arch.embedded13 years ago 12 replies

Hey evryOne! How about wiegand protocol? Did some search with my web archive engine and there is lot of info available out...

Hey evryOne! How about wiegand protocol? Did some search with my web archive engine and there is lot of info available out there;-) But I could not understand how a MCU and RS232 can communicate over this protocol? I mean that there are tow data lines representing '0' and '1' in wiegand, where as normally dealing with RS232 we use MAX232 line driver's tow pins that are R...


Please suggest USB to RS232 adapter that works 100%

Started by in comp.arch.embedded11 years ago 28 replies

I've purchased one already made by "Cypress Semiconductor" but it doesn't work. The VID is 04b4 and the PID is 5500. Can anyone suggest a...

I've purchased one already made by "Cypress Semiconductor" but it doesn't work. The VID is 04b4 and the PID is 5500. Can anyone suggest a USB to RS232 adapter that does its job perfectly 100% of the time under Microsoft Windows, i.e. it trully behaves exactly just like any other serial port?


PIC/AVR PWM + RS232 simultaneously?

Started by Anonymous in comp.arch.embedded11 years ago 6 replies

Are there any sub 10 USD AVR or PIC uC that can do hardware PWM at the same time as hardware RS232 ..? The source of my question is that I...

Are there any sub 10 USD AVR or PIC uC that can do hardware PWM at the same time as hardware RS232 ..? The source of my question is that I suspect that same timer is used both for bitrate generation and for PWM frequency+duty cycle.


8 output pins to RS232 UART/USB

Started by Niek in comp.arch.embedded15 years ago 5 replies

Hello, Does somebody know if there is a chip with 8 input ports to send 1 byte parallel and then automatically sends the byte out by USB...

Hello, Does somebody know if there is a chip with 8 input ports to send 1 byte parallel and then automatically sends the byte out by USB (first choice) or by RS232?? My problem is that I need 3 com-ports on my microcontroller and my processor (zilog Z8S180) only has 2!!! I have an 1 byte output register that I am not using so I thought maby I can use it in this way.... Can somebody he...


Has anybody tried using Lauterbach's TRACE32 Simulator?

Started by marL in comp.arch.embedded11 years ago

Hi guys. I'm doing some investigation regarding TRACE32 Simulator. I'll be simulating a board with a PowerPC chip installed running in pSOS....

Hi guys. I'm doing some investigation regarding TRACE32 Simulator. I'll be simulating a board with a PowerPC chip installed running in pSOS. When using the board, I simply connect it through RS232 to my PC. To test it, I use the Hyperterminal in Windows. But what I want is, instead of using the board, I want to use TRACE32 Simulator as if it was connected to my PC through RS232. I want to hav...


RX/TX RS232 using USART0 & 1 MSP430F1611

Started by Anonymous in comp.arch.embedded12 years ago 5 replies

Hello everybody ! I am a beginer in MSP430 programing... I have juste finished to code a sofware that generate a a frame and send it to a PC...

Hello everybody ! I am a beginer in MSP430 programing... I have juste finished to code a sofware that generate a a frame and send it to a PC using USART1 (RS232)... Not an hard work :p Now I would like to receive frames from USART0 and then to Send these frame using USART1... for example : TXBUF1=3DRXBUF0; (every RX1 interrupt.) Anyway I have try something : Initialize USART0 and ...


USB for embedded controller

Started by dyrl in comp.arch.embedded7 years ago 10 replies

Hello, I am designing an embedded system to run 7/24/365, so it should be robust. The point now is that for a accelerating the design I am...

Hello, I am designing an embedded system to run 7/24/365, so it should be robust. The point now is that for a accelerating the design I am thinking going for an USB-rs232 converter that can handle up to 625Kbps. I would like to know if the USB-rs232 converter solution is a good one, since no human handling will take place on this system, so there will be no one to insert or remove US...


HDLC Synchronous RS232

Started by sunil in comp.arch.embedded14 years ago 8 replies

hi all, iam currently programming MC68360 board processor SCC's to work for Synchronous HDLC and iam taking out RS232 pin outs from the...

hi all, iam currently programming MC68360 board processor SCC's to work for Synchronous HDLC and iam taking out RS232 pin outs from the P2 connector. I have initialized the registers and set jumpers according to the instructions. but iam not getting the Clock signals from the TXCLK lines. can u pls give me some hints what r the things that can go wrong which will lead to this kind of ...


Using an X Windows Terminal as an RS232 debug interface

Started by howy in comp.arch.embedded12 years ago 13 replies

In all my embedded DSP based products I use an RS232 port (driven with printf) as a means of seeing whats going on inside a CPU or DSP. I am...

In all my embedded DSP based products I use an RS232 port (driven with printf) as a means of seeing whats going on inside a CPU or DSP. I am looking for a way to increase the flexability of the displayed data since there is often data from differnt processes all competing for my attention before it scrolls off the screen. I was considering using an X Windows terminal emulator program (whi...


LIN and RS232

Started by Jones in comp.arch.embedded13 years ago 15 replies

I have an embedded target I am trying to program (MC9S08DZ60 microcontroller) that has the SCI pins connected to a TJA1020T LIN transceiver...

I have an embedded target I am trying to program (MC9S08DZ60 microcontroller) that has the SCI pins connected to a TJA1020T LIN transceiver with single-wire output. My question is, can I connect this single-wire LIN directly to a pin (or pins) of the RS232 port on the back of an old DOS PC, and if so, how? Can anyone provide link(s) to FAQs or tutorials to help me get started? Or, ar...


rs232 to vga converter

Started by Hul Tytus in comp.arch.embedded11 years ago 2 replies

comp.arch.embedded rs232 to vga converter The fonts were chosen to reduce storage space which is a bit rough on the eye. As Grant...

comp.arch.embedded rs232 to vga converter The fonts were chosen to reduce storage space which is a bit rough on the eye. As Grant mentioned, the 'R' is ugly. The 'K' is about the same, maybe a little worse. This and the lack of lower case letters make reading a novel on the rs-big-print painful. But, if reading a thermal monitor in a casting process or the digital readouts on a mach...