RS232 or USB to RS485

Started by QBA in comp.arch.embedded16 years ago 34 replies

I need RS232 to RS485 converter or USB to RS485 converter, are there vendors out there you recommend for these converters? More specifically,...

I need RS232 to RS485 converter or USB to RS485 converter, are there vendors out there you recommend for these converters? More specifically, RS485 I am using is 2-wire (ground, don't need 4-wire version) at 19200 baudrate.


Splitting a serial (RS232) port signal?

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

I have a hardware platform that only have one serial port (COM1, a RS232 port) available, but I need to connect to two devices. The following...

I have a hardware platform that only have one serial port (COM1, a RS232 port) available, but I need to connect to two devices. The following diagram shows how A and application B want to talk to device Ad and device Bd respectively (over the single COM port). App A---- | |---- COM1A------ Device Ad COM1---- SPLITTER---- ...


reading in data from rs232 port, require to resend as an email

Started by Lyn in comp.arch.embedded11 years ago 12 replies

I am reading in some temperature sensor data, via RS232 (actually converted to USB via a CP2102 ), approx every hour into a Windows XP PC. It...

I am reading in some temperature sensor data, via RS232 (actually converted to USB via a CP2102 ), approx every hour into a Windows XP PC. It reads fine into Windows Hyperterminal. I want to be able to send this data out via email as it arrives. Is there any application that can do this, free or commerical, please? I have searched using Google but not found anything. Lyndsay Williams www...


USB<->RS232 converter cable recommendations.

Started by Brian Murtha in comp.arch.embedded15 years ago 9 replies

Has anyone torture tested USB RS232 converter cables lately? The ones Dontronics sells with the FTDI chipset have been working great for us,...

Has anyone torture tested USB RS232 converter cables lately? The ones Dontronics sells with the FTDI chipset have been working great for us, but they raised the price through the roof. We need one that supports DSR and DTR signals, works on all Windows OS's except NT & 95, handles 460,800 baud, and has good quantity 100 pricing. -Brian http://www.rabbitsemiconductor.com http://ww


Microprocessor & full fledged RS232

Started by QBA in comp.arch.embedded16 years ago 1 reply

Hello, I need an eval. board preferably with 68HC11/12 that has full fledged RS232, most importantly RTS and parity manipulations -- changing...

Hello, I need an eval. board preferably with 68HC11/12 that has full fledged RS232, most importantly RTS and parity manipulations -- changing mark parity to space parity from one byte to next. Do you know any such eval. board? Thanks! QBA


RS232 to GPIB converter using NAT9914

Started by Mirna in comp.arch.embedded14 years ago 3 replies

Hi, I'm a student at the Faculty of Electrical Engineering and computing in Zagreb, Croatia.For my bachelor degree im designing a sort...

Hi, I'm a student at the Faculty of Electrical Engineering and computing in Zagreb, Croatia.For my bachelor degree im designing a sort of converter.It would be an RS232 to GPIB converter.I'm using microcontroller from 8051 family and NAT9914 as interface to GPIB bus. The NAT9914 handles the communication layer,but doesn't interpret too much of the data, so if I would like to make IEEE 488...


Windows Driver for USB to RS232?

Started by in comp.arch.embedded10 years ago 10 replies

I got a USB to RS232 adapter off eBay. I'm using it in Windows so it comes up as a COM port. The only problem is that the device appears...

I got a USB to RS232 adapter off eBay. I'm using it in Windows so it comes up as a COM port. The only problem is that the device appears as COM5, but all the old programs I have only work with ports COM1 to COM4. When I go to Device Manager, the device shows up as a COM port under "Ports", but when I got into the properties for it, it does _not_ give me the normal option of being able to choo...


USB as standard debug interface

Started by acd in comp.arch.embedded8 years ago 76 replies

In the past the typical debug backdoor was a RS232 interface. I have for instance a BlueWave multi-DSP VME board, which has beside the VME and...

In the past the typical debug backdoor was a RS232 interface. I have for instance a BlueWave multi-DSP VME board, which has beside the VME and an ethernet board an RS 232 for console output. The reason RS232 was chosen for this purpose is obvious, cheap, small, available on most PCs, easy to implement and in a way foolproof (or at least problems such as wrong pinout can be easily fixed). ...


RS232 Full Duplex to Half Duplex

Started by Anonymous in comp.arch.embedded14 years ago 14 replies

Is there any way to make the rs232 port on the 6812 to work like a half duplex port?

Is there any way to make the rs232 port on the 6812 to work like a half duplex port?


Low power USB Microcontroller

Started by Anonymous in comp.arch.embedded12 years ago 9 replies

I wonder if anyone can help, I am looking for a USB Microcontroller with the following specifications USB+USART+SPI , possibly not need...

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 such that current consumption is around 1mA but the RS232 to keep running and the data logged and no p...


Recommend hardware with USB, RS232, A2D, and more...

Started by Rob in comp.arch.embedded15 years ago 1 reply

Looking for a processor board with: - USB Host port (Full-speed, USB v1.1 minimum), - 2x Serial ports (RS232, RS485), - 12-bit A/D converter...

Looking for a processor board with: - USB Host port (Full-speed, USB v1.1 minimum), - 2x Serial ports (RS232, RS485), - 12-bit A/D converter (under 2k samples/s) - Several general purpose I/O or parallel port. - Real-time clock (battery backed) and timers. - Low power consumption; few Watts. - Support an embedded operating system, like Linux preferably (but not essential). - Flash and RAM...


[OT?] a SIMPLISTIC RS232 data logger using some flash device --- does it exist commercially?

Started by Richard Owlett in comp.arch.embedded14 years ago 33 replies

Caution: I explicitly stated "simplistic" on purpose. I did not say simple, elegant, robust or many other adjectives. The input...

Caution: I explicitly stated "simplistic" on purpose. I did not say simple, elegant, robust or many other adjectives. The input sequences will be a rs232 level 4800 baud data stream of


FLIP only works on 9600

Started by aleksa in comp.arch.embedded10 years ago 1 reply

I've made two programming cables, both with the same result: the AT89C51ED2 can only be programmed with the lowest speed, 9600. First cable...

I've made two programming cables, both with the same result: the AT89C51ED2 can only be programmed with the lowest speed, 9600. First cable had MAX232 directly on RS232, then 1m flat cable to C51. Second cable has 1m flat cable from RS232 to MAX, then 20cm to C51. GND is between every wire. I can connect on max 57600, and successfuly read the flash, but cannot program it on 5760...


24C16A EEPROM programmer

Started by pozz in comp.arch.embedded11 months ago 1 reply

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware...

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware interface (USB to IIC or RS232 to IIC). I have a PicKit2, but I'm not sure if they can be used to program IIC EEPROM. If yes, what is the software to use? I could write a simple firmware for an MCU with IIC that connects to a PC (via RS232 or...


rs232 to vga converter

Started by Hul Tytus in comp.arch.embedded12 years ago

comp.arch.embedded rs232 to vga converter Some of the displays showing rs-big-print messages were changed to full size to make the purpose...

comp.arch.embedded rs232 to vga converter Some of the displays showing rs-big-print messages were changed to full size to make the purpose more visable. If you get a chance to look, it's at www.rs-big-print.com. Hul - Due in large part to messages here and rec.crafts.metalworking about -searches for various type of crt controllers I've built one & placed it on -the market. It gener...


Trying to implement RS232 hardware handshaking between a PC Serial port and an Analog Devices Blackfin 533

Started by Anonymous in comp.arch.embedded15 years ago 3 replies

Ahh the ever popular confusing with RS232 continues. So the first thing I'm asking myself is if my dsp (the blackfin 533) is a DCE or DTE. I'm...

Ahh the ever popular confusing with RS232 continues. So the first thing I'm asking myself is if my dsp (the blackfin 533) is a DCE or DTE. I'm assuming it's a DTE for the time being. So I figure that all I need to do is use a null modem cable that has the TX and RX lines crossed as well as the RTS and CTS lines. I figure I will just use two of the Blackfin's Programmable Flags to behave a...


bluetooth->RS232

Started by Anonymous in comp.arch.embedded15 years ago 3 replies

My company makes an embedded device which normally is controlled by a wintel host via RS232. The communication method is 8-bit binary,...

My company makes an embedded device which normally is controlled by a wintel host via RS232. The communication method is 8-bit binary, packet based, with no hardware flow-control (3-wire interface). I now have a new requirement: My device must communicate with a bluetooth enabled wireless host. The host may be either a bluetooth enabled wintel box(running winxp) or a PocketPC(windows CE). ...


GPS tracking application

Started by pozzugno in comp.arch.embedded5 years ago 1 reply

I need to log GPS coordinates (time and position) every x seconds. I have a GPS receiver connected through RS232. Together I have to log...

I need to log GPS coordinates (time and position) every x seconds. I have a GPS receiver connected through RS232. Together I have to log measures from sensors connected to another RS232 port (proprietary protocol). I think the GPS real-time tracking is almost standard so I think there are many hw/sw already available. Is there a software sufficiently flexible to join my custom sensors...


Non Standard Ethernet pass through connector

Started by steve in comp.arch.embedded7 years ago 9 replies

I have been asked by a customer if we can mount my networked product in a IP67 case. It has three connectors, power, RS232(D connector) and...

I have been asked by a customer if we can mount my networked product in a IP67 case. It has three connectors, power, RS232(D connector) and Ethernet(RJ45 10/100) which need to pass through the case wall. For the power and RS232 I am intending to use Souriau UTS Hi seal connectors (basically circular IP68 waterproof connectors) I am wondering if the same connector could be used for t


RS232 related query

Started by Anonymous in comp.arch.embedded15 years ago 2 replies

Hi, I have some confusion related to the RTS and CTS hardware flow control in RS232 serial communication. RTS is request to send.Is it...

Hi, I have some confusion related to the RTS and CTS hardware flow control in RS232 serial communication. RTS is request to send.Is it send by device A if it wants to send data to another device B or when it is ready to receive data from another device? How about the CTS signal. How can sender be stopped sending using these signals? Please clarify my doubt. Thanks in advance...