All Questions
15
questions
0
votes
2
answers
203
views
Can I Use RS232 Library For RS422 in PIC Microcontroller?
I have this project where I have to use RS422 and Max485 serial communication.
The task is simple: The input from 15 buttons should be send to PC by RS422 using PIC18F4620.
I have no experience in ...
0
votes
2
answers
768
views
1-channel GPIO from industrial PC over RS232 port
I am ordering a computer based on 4x4-R1000V motherboard (Ryzen Embedded, https://www.asrockind.com/overview.asp?Model=4X4-R1000V) for an industrial application.
I need a 1-channel GPIO (0 for zero, >...
- 167
0
votes
1
answer
111
views
How to identify 422 or 485 bus from the PCB
I have a very old CPU card, maybe 1980's. It has following chips on it and most probably these are used for communication with the rest of the system.
SN55188 Quad Line Drivers
SNJ55189 Quad Line ...
- 1,479
2
votes
1
answer
5k
views
RS422 and RS485; full-duplex or half-duplex?
I have extensively used RS232 transceivers in many projects and have fairly good understanding of UART communication using RS232 transceivers. MAX232 and MAX3232.
Now I have to build my understanding ...
- 1,479
0
votes
2
answers
167
views
Help figuring out the interface on this bill validator?
I would like to interface this bill validator to a microcontroller (Arduino Mega). The website says it supports RS232,RS485,Optoisolated RS232 and USB interface.
The one I have is currently intefaced ...
- 17
0
votes
1
answer
1k
views
Use RS232 - RS422 Converter with Encoder
Problem
I am trying to communicate an incremental encoder (TTL/422) with a PC, however, the PC is modern (correct me if I am wrong, It is a Sabertooth Z77) and doesn't have parallel ports...
I found a ...
- 105
37
votes
3
answers
10k
views
What does 232 signify in the RS232 standard?
"RS" in communication standards RS232 and RS485 stands for "Recommended Standard". But what information does "232" or "422" or "485" convey in the name? What naming convention is used for numbers ...
- 441
1
vote
2
answers
697
views
Are RS232 to RS422 converters reversible?
I'm trying to get a MCU with a db9 female serial out port (using RS422 protocol) to communicate with a CY8CKIT-050 PSoC® 5LP Development Kit (running a microcontroller).
The development board comes ...
- 11
0
votes
1
answer
437
views
RS232, RS422 Splitter-- EDIT fot JTAG [closed]
Is it good to use one UART interface on MCU, RX_UART for receiving data from RS422 receiver and TX_UART for transmitting the same data to the RS232 and RS422 transmitter? I am trying to use UART as "...
- 673
1
vote
2
answers
15k
views
STM32 RS485 connection
I want to interface stm32f0 with rs422 (half duplex and full duplex). What I'm not getting how to connect RE and DE signals to rs 232. From UART I'll be having RX, TX, VCC and GND pins which i need to ...
- 11
0
votes
1
answer
3k
views
Wiring RS485/422 to RS232 converter to a given device pins [closed]
I'm trying to establish a full-duplex and then a half duplex communication and need to wire a device output to an RS485/422 to RS232 converter.
Here is the device output pins for full and half ...
- 12.2k
1
vote
2
answers
3k
views
How would I make an Arduino Due recieve RS-232/422 signals?
Background on this question is here: What can I do to decrease the latency from these serial ports which are attached to a PC via a Serial to USB adapter?
I'm looking at purchasing an Arduino Due to ...
- 205
9
votes
4
answers
10k
views
What can I do to decrease the latency from these serial ports which are attached to a PC via a Serial to USB adapter?
I think I have accidentally discovered a need in my life for embedded systems. Which is great! And kind of scary. And I need help.
Background: I got hired to build a GUI application which takes scans ...
- 205
0
votes
1
answer
2k
views
RS232 and RS422 (Isolated and ESD Protected)
I want my RS232 and RS422 to be galvanically isolated and ESD protected. I have two options to implement this requirement.
Option 1: MCU-->OPTO-->DRIVER-->ESD PROTECTION
Use MAX3232 for RS232 driver ...
- 2,303
5
votes
4
answers
848
views
Multidrop one or two lane bus
I like to design a single master, several slave (up to 100) application and looking for a reliable (up to 30meter) multi drop bus. One or two lane is preferred, I will use daisy chain topology ...
- 2,236