#use rs232

Started by sirtiffguy in Piclist13 years ago 1 reply

Hi, I am trying to create a full hardware handshaking rs232 port with cts and rts (dsr, dtr) lines... does the rs232 module...

Hi, I am trying to create a full hardware handshaking rs232 port with cts and rts (dsr, dtr) lines... does the rs232 module include these lines as extra lines like the enable function? Also, how do I find out what all the parameters I am allowed to pass to the rs232


Pic16f877->RS232->VB6

Started by onmyownja in Piclist13 years ago 2 replies

WANT TO KNOW IF YOU AR USING RS232 FOR INPUTING AND OUPUTING DATA VIA THE MSCOMM PORTS USING VISUAL BASIC , THE INPUT FROM...

WANT TO KNOW IF YOU AR USING RS232 FOR INPUTING AND OUPUTING DATA VIA THE MSCOMM PORTS USING VISUAL BASIC , THE INPUT FROM THE SESOR THROUGH THE MICROCONTROLLER TO THE RS232 WHAT FORM DOES VISUAL INTERPRET AS? MEANING DOES VB SEE ZEROS AND ONES OR CHARACTERS


Maximum serial lines

Started by George Shaw in Piclist14 years ago

What is the maximum number of output lines you could have that would be outputting RS232 data streams (not Rx) on a say 16F877 ? ...

What is the maximum number of output lines you could have that would be outputting RS232 data streams (not Rx) on a say 16F877 ? These would be sent to a RS232 line driver. Each RS232 stream would be required to send a single ASCII code for 1A, 1B, 2A, 2B, etc up


RS232 Parasitic power

Started by Scott Lingerfelt in Piclist12 years ago 6 replies

Is it possible to power my PIC from an RS232 serial cable connected to my PC? If so were can I find some schematics or can someone tell me...

Is it possible to power my PIC from an RS232 serial cable connected to my PC? If so were can I find some schematics or can someone tell me what I need. Thanks in advance, Scott


Simple RS232

Started by upand_at_them in Piclist12 years ago 9 replies

I'm in need of a low temperature capable RS232 circuit and the MAX232's that I have are only good to 0C. I've found out...

I'm in need of a low temperature capable RS232 circuit and the MAX232's that I have are only good to 0C. I've found out that I can use a 2N3904 and two resistors to TX from PIC to PC. It works great and should be good down to -40C. The transistor is operating as an i


RS232 serial communication problems with 18F458

Started by Gavin Dingley in Piclist10 years ago 1 reply

Hi, I am fairly new to pics, so you will have to forgive me. I am playing with a 18F458, no particular reason for using this device, it's just I...

Hi, I am fairly new to pics, so you will have to forgive me. I am playing with a 18F458, no particular reason for using this device, it's just I had one available, and for this question I think the scope is general to other devices in the range. I have prototyped a circuit on breadbaord using this PIC and a MAX232 chip so that I can communicate from a PC to the device through RS232. Basically ...


RS232/i2c on a 877

Started by stdf23173 in Piclist14 years ago

Hello all, I try to receive rs232 data on my 877 and send it again via i2c. What i found out is that they do not work nicely...

Hello all, I try to receive rs232 data on my 877 and send it again via i2c. What i found out is that they do not work nicely together :( I tried to solve it by clearing and setting sspen and spen when using the uart/mssp module. init_uart(); init_i2c


RS232 to LCD issue

Started by Chas Douvier in Piclist14 years ago 6 replies

I am making the code for a 18F452 "Dumb Terminal" like I previously was working on. I'll post it on a page sometime or on the...

I am making the code for a 18F452 "Dumb Terminal" like I previously was working on. I'll post it on a page sometime or on the piclist site after I am done. It's pretty close except I am having a problem. My incoming RS232 is echoed back to the client (for a rough type of


9 wire RS232

Started by Scott Lingerfelt in Piclist14 years ago 1 reply

Anyone, I am trying to connect to a GSM modem model GM28 from Sony Ericsson. They note that I require a 9 wire RS232...

Anyone, I am trying to connect to a GSM modem model GM28 from Sony Ericsson. They note that I require a 9 wire RS232 connection to communicate with the modem. Am I correct in thinking that the SMS band is always on so I do not require RTS (ready to send) pin on the mode


Doubts on tutorial web site

Started by Fiona Soon in Piclist12 years ago

Hi Everybody,   Has anyone try to assemble the sample program on RS232 test routine at ...

Hi Everybody,   Has anyone try to assemble the sample program on RS232 test routine at http:/ /www.electronic-engineering.ch/microchip/projects/rs232/rs_test/rs_test.html   Does it really work? I found many errors when assembling the


Can I share an external EEPROM

Started by Floyd Sense in Piclist8 years ago 1 reply

I have an existing PIC based application and need to add RS232 communications to a PC. Due to timing constraints and other factors, I can't add...

I have an existing PIC based application and need to add RS232 communications to a PC. Due to timing constraints and other factors, I can't add that code to the existing PIC and intend to do the RS232 work with an additional and separate PIC. What I need is a way to occasionally pass information between the two. I've never used an external EEPROM chip and wonder if there's a way to share access...


RS-232 x 16F628A

Started by fbragasp in Piclist14 years ago 4 replies

Hi! Does anyone has a Rs232 example program using the 16F628A? Tks, Filipe.

Hi! Does anyone has a Rs232 example program using the 16F628A? Tks, Filipe.


PIC w/ spi, i2c & rs232

Started by Andrew Ritchie in Piclist14 years ago

Hi all Just wondering if anyone out there could help me with a little problem I have currently... Basically I want to...

Hi all Just wondering if anyone out there could help me with a little problem I have currently... Basically I want to create a prototype MP3 player using a PIC16F877. This bit is easy - there is heaps of info on the web about how to do this. Where the trouble l


[EE] serial multiplexer

Started by Vic Fraenckel in Piclist12 years ago 2 replies

I am looking for a device that can connect one RS232 port (TX and RX) on an embedded processor to one of several devices with serial...

I am looking for a device that can connect one RS232 port (TX and RX) on an embedded processor to one of several devices with serial ports and can be controlled by a couple of I/O bits on the controller. Can this be done? Any enlightenment will be appreciated. TIA


RS232 Level Shifting

Started by Scott Lingerfelt in Piclist12 years ago 6 replies

I need a solution that allows me to communicate with a modem that has max 3.3Volt interface and my PIC must run at 5Volt due to other ...

I need a solution that allows me to communicate with a modem that has max 3.3Volt interface and my PIC must run at 5Volt due to other interfacing. I have been looking at using the MAX3243 to handle the shifting from the PIC at 5V to 3V then from the modem at 3V to 5V. The only reason I do not want to use this chip is I only need 1 TX and 1 RX line and


plotter

Started by Lez in Piclist11 years ago 2 replies

Few years ago I bought an old calcomp model 83(m83) I fiddled with it and it did a self test. well here I am five years or so later and I...

Few years ago I bought an old calcomp model 83(m83) I fiddled with it and it did a self test. well here I am five years or so later and I finally deiced to try it again, but cant remember what button combination I used to get a self test out of it. It says rs232 on th back with dip switches for baud rate etc. Does anyone have one of thse still, I'm wondering what type of serial cabl...


PIC Dumb Terminal

Started by Charles Douvier in Piclist14 years ago 2 replies

I am sure anyone who has been around for at least a months has an idea of most of the projects on piclist.com. I was poking around...

I am sure anyone who has been around for at least a months has an idea of most of the projects on piclist.com. I was poking around serial IO and came across the PIC Dumb terminal and thought of it as a great project. I would like to have something that took rs232 from a pc and display it o


interrupt called getc()

Started by sirtiffguy in Piclist13 years ago

Hello, I've just spent a *very* long time fooling around with a rs232 asyncronous reciever on an RB interrupt. The...

Hello, I've just spent a *very* long time fooling around with a rs232 asyncronous reciever on an RB interrupt. The interrupt looks something like this: #int_RB void RxChar() // input through RB7 { INTCON.RBIE=0; RCREG_X=fgetc(MCP


Xport connection

Started by Scott Lingerfelt in Piclist14 years ago

I have just received my Xport from Lantronix for evaluation! Has anyone else used the Xport with their PIC's? If so how are you...

I have just received my Xport from Lantronix for evaluation! Has anyone else used the Xport with their PIC's? If so how are you powering your Xport? RS232 or direct 3.3V? Anyone contacted Lantronix about the CPK programming kit? If so do they require you to go through their training


IEE802 help

Started by Vasile Surducan in Piclist13 years ago 1 reply

Hi piclisters@jallisters, I'm interested in IEE802 specifications Do you know a place where I can found those ? Any...

Hi piclisters@jallisters, I'm interested in IEE802 specifications Do you know a place where I can found those ? Any experiences in implementing direct PIC to ethernet communication? (no ethernet/PC to RS232-PIC...) thank you in advance, Vasile