Monitor RS232 Line Communication - PC hookup

Started by Klaus Vestergaard Kragelund in comp.arch.embedded15 years ago 19 replies

Hi I'm communicating to a HP33120a function generator. PC and instrument are both DTE devices and I use a null-modem cable as described by...

Hi I'm communicating to a HP33120a function generator. PC and instrument are both DTE devices and I use a null-modem cable as described by HP. When I run the software I have written in LabWindows I sometimes get errors from the instrument. Header errors and "Input Buffer Overflow" errors Also for purposes of setting up a larger test system which includes scopes and multimeters too I ha...


Monitor RS232 comms with millisecond resolution

Started by rowan.bradley in comp.arch.embedded9 years ago 75 replies

Anyone know the quickest or easiest way of recording a serial data stream and timestamping each byte with a resolution of at least 1ms...

Anyone know the quickest or easiest way of recording a serial data stream and timestamping each byte with a resolution of at least 1ms (preferably finer)? I can only find cheap or free programs with less resolution, or very expensive solutions, often involving special hardware. I only need to monitor one port, and I don't need to send any characters (actually I'm snooping on an RS485 bus). ...


Empty Hub Enclosures?

Started by Mike V. in comp.arch.embedded15 years ago 12 replies

I want to make a board that has: 1. ethernet socket 2. two rs232 ports 3. one rs485 ports And put an enclosure around it. Do you guys know...

I want to make a board that has: 1. ethernet socket 2. two rs232 ports 3. one rs485 ports And put an enclosure around it. Do you guys know of any enclosure companies that sell plastic enclosures that look like your small typical Netgear or Linksys hubs, which i can just get the holes cut out? I need that "cool" look, rather than just going to Digikey and getting a simple plastic rectangu...


Looking for a board with following caracteristics...

Started by Guillaume Chevillot in comp.arch.embedded12 years ago 4 replies

Hi, I'm looking for an embedded board with these minimum caracteristics : - maximum size 150x150mm - low consumption : less than 1A with a...

Hi, I'm looking for an embedded board with these minimum caracteristics : - maximum size 150x150mm - low consumption : less than 1A with a 5-7V power supply - one (or more) i2C link - a free RTOS running on with free tools (to compile, download, ...) eCos would be the better. - one usable (not only for programming) RS232 link with a DB9 connector A do not need a powerfull CPU, ...


Micro Controller Advice/Help Needed

Started by deanvesuvio in comp.arch.embedded11 years ago 14 replies

I'm building a small device that will talk to the world through a modem. I've ordered the XE2422H devkit from XEComm. It basically has a...

I'm building a small device that will talk to the world through a modem. I've ordered the XE2422H devkit from XEComm. It basically has a RJ-11 connector for the phone line and an RS232 connector for the controller. I need a cheap microcontroller that's easy to deal with which I can interface with the XE2422H. It will be doing data collection via the modem, so I'd like it to have at least 256KB ...


PC 104 questions for newbie

Started by leutholl in comp.arch.embedded13 years ago 2 replies

Hi, I'm new here ad new to PC 104. I have a PC104 system in front of me having: - RS232 port - MVB/CAN Bus interface - Parallel port -...

Hi, I'm new here ad new to PC 104. I have a PC104 system in front of me having: - RS232 port - MVB/CAN Bus interface - Parallel port - PS/2 keyboard port - special connector to a touchscreen which i have (working!) - some little rotary switch to dial in a address for something in hexadecimal (now it is 0xF and 0xF) - a loudspeaker output everything boots fine. Having DOS 6.22 instal...


At89C51RD2 ISP Programming

Started by Anonymous in comp.arch.embedded13 years ago 1 reply

Hello all, I'm using the at89C51RD2 in an current application where I;m trying to use the Flip and the RS232 ISP programming. I programmed a...

Hello all, I'm using the at89C51RD2 in an current application where I;m trying to use the Flip and the RS232 ISP programming. I programmed a virgin chip perfectly the first time and was amazed at how easy it was. Now that I'm trying to program it again though I'm having problems. The flip software is giving me an error message about a software timeout. I've done nothing with ALE I've...


need some help programming a pic

Started by david in comp.arch.embedded11 years ago 1 reply

I have some hardware that has a PIC18F6680 pic cpu. This is older hardware that is non programmable that we are starting to replace with...

I have some hardware that has a PIC18F6680 pic cpu. This is older hardware that is non programmable that we are starting to replace with a reprogrammable version. The newer version is the basically the same, but has a maxium max3233e rs232 chip, and a mini headphone jack that we connect to a laptop to program with vendor software via a laptop w/serial port. What would be the easiest way to re...


Help wih design

Started by tguclu in comp.arch.embedded12 years ago 1 reply

Hi everyone I'm upgrading an existing embedded system. This system has 1 serial port and DOS is runnig on it. But customers wanted this device...

Hi everyone I'm upgrading an existing embedded system. This system has 1 serial port and DOS is runnig on it. But customers wanted this device to talk with other 8 devices over RS232(new requirement) First idea i came up with is ; finding a new card with 8 serial ports on it and integrate it to the former system.So that it would be the interface between existing system and other devices. ...


Embedded PC and RT

Started by Sandra in comp.arch.embedded14 years ago 9 replies

Hi folks, I need some advice: For my diploma thesis, I need an embedded PC with CAN, RS232, Ethernet, RT OS and low power consumption (for...

Hi folks, I need some advice: For my diploma thesis, I need an embedded PC with CAN, RS232, Ethernet, RT OS and low power consumption (for use with battery). Finally, I found a system, that would fit best, but the problem is, that it just includes standard linux support. (it=B4s an embedded pc system from janz, with NS Geode GX1, 300MHz, http://www.janz.de/as/files/empcx302.pdf ) An...


What is the best USB-to-RS232 adapter out there?

Started by Chris_99 in comp.arch.embedded13 years ago 28 replies

Gang: Now that all the cuel new laptops have no serial ports and no PCMCIA card slot, and I am stuck haplessly with USB, does anyone have a...

Gang: Now that all the cuel new laptops have no serial ports and no PCMCIA card slot, and I am stuck haplessly with USB, does anyone have a good experience with any USB (or fire-wire) serial devices? I have many legacy apps that want to talk to a UART real bad and the quality of the driver would be the issue here. I would really appreciate a couple of names of devices I could purchase...


GPS modules ?

Started by Alex Gibson in comp.arch.embedded14 years ago 32 replies

Could someone recommend a gps module suitable for use in embedded projects (pic and lpc21xx) , robotics and hooking up to a (laptop/pc with...

Could someone recommend a gps module suitable for use in embedded projects (pic and lpc21xx) , robotics and hooking up to a (laptop/pc with windows and osx drivers). Either 3V or 5V powered, ASCI output via rs232 or i2c or spi - (NMEA 0183) and under 10cm by 10cm (5cm by 5cm or under would be better). Start up time isn't a concern , up to a couple of minutes is fine Quite a few out th...


ESD problems with PIC 16F88

Started by Anonymous in comp.arch.embedded11 years ago 14 replies

I have built a number of battery operated circuits using PIC16F88s. They are housed in a plastic case with a socket to plug in a...

I have built a number of battery operated circuits using PIC16F88s. They are housed in a plastic case with a socket to plug in a serial connection for controlling LED outputs by RS232 comms. 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 ...


USB OTG host to host communication

Started by Mark Piffer in comp.arch.embedded8 years ago 2 replies

Hi c.a.e, I was asked to implement a bidirectional communication via USB (on an AVR32, which is OTG capable) between two identical devices....

Hi c.a.e, I was asked to implement a bidirectional communication via USB (on an AVR32, which is OTG capable) between two identical devices. After some time of searching I couldn't even come up with a definitive answer if this is possible at all. Effectively this connection should work like a RS232, i.e. when you connect the two devices with a cable they should start talking to each other wi...


pic16f627 with different baudrates

Started by rose fay in comp.arch.embedded12 years ago 2 replies

Hi! I am a newbee of using PIC USART and internal clock. I am developing a program that will send a data to an instrument to enable it to...

Hi! I am a newbee of using PIC USART and internal clock. I am developing a program that will send a data to an instrument to enable it to send an output to the PC via RS232. The problem is, my hardware has 8 channels with different instruments which run with different baudrates. The data sent is similar on all channels. How could i send the correct data to the corresponding channel which i...


Isolated UART communication

Started by Rohan in comp.arch.embedded12 years ago 3 replies

Hi All, Any suggestions about making high-speed (16k baud) opto-isolated UART communications between 1. Microcoltroller to Microcontroller...

Hi All, Any suggestions about making high-speed (16k baud) opto-isolated UART communications between 1. Microcoltroller to Microcontroller at TTL Levels. 2. RS232 port and microcontroller How do you guys do it. I use two opto couplers (4n35) for receive and transmit side but it has its speed limitations. Thanks, Rohan


PROBLEM with MSP430F2121 and BSL

Started by Anonymous in comp.arch.embedded12 years ago 4 replies

Hi, I'm new here. I'm italian and so my english is not very good...pardon! I have need to program MSP430F2121 (28 pin, 4KB, UART) using...

Hi, I'm new here. I'm italian and so my english is not very good...pardon! I have need to program MSP430F2121 (28 pin, 4KB, UART) using BSL (Bootstrap Loader) controlled by PC. By Visual Basic 6, I'm be able to driver RS232 (TX, RX, RTS, and DTR) and I'm be able to communicate to MSP430F2121. I make thing step-by-step, reading before sall0089d and slaa0096d. First Step: I send to MSP...


Low power SBC with large memory

Started by Anonymous in comp.arch.embedded13 years ago 4 replies

I've got an application that needs an SBC (a redundant pair, actualy) which will survive 24 hours on battery power. I either spec a bank of big...

I've got an application that needs an SBC (a redundant pair, actualy) which will survive 24 hours on battery power. I either spec a bank of big batteries, or find something less hungry than the 12-watt Ampro board I was originally looking at. I need Ethernet, 4 RS232 ports, USB, and 512MB of DRAM. I did some searching for Alchemy or XScale SBCs, but everything strikes out on the memory ...


MyBlueRoom.com is now www.BlueRoomElectronics.com

Started by William at MyBlueRoom in comp.arch.embedded13 years ago

If you're looking for the schematics on www.myblueroom.com Inchworm ICD2 & Cricket Thermostat. I've had to move domains and transferring was a...

If you're looking for the schematics on www.myblueroom.com Inchworm ICD2 & Cricket Thermostat. I've had to move domains and transferring was a royal pain. I've not updated the site though, I want to put the PCB layout for the ICD2 compatable (easy to build and very basic VDD 5V and VPP ~12.5 which is plenty and generated using a common RS232 level converter) I'm also a big fan of PICs ...


bit file fpga to pc

Started by wluiscam in comp.arch.embedded11 years ago 5 replies

Hello everyone, I'm working on a project that requires sending pixel data from an fpga to a PC, RS232 would be fine but Ethernet is also...

Hello everyone, I'm working on a project that requires sending pixel data from an fpga to a PC, RS232 would be fine but Ethernet is also considered. (need to create a bit file to process the image in the PC). Any VHDL code reference for the transmission process and any advice on generating the bit file would be highly appreciated. Thanks,