Sponsored Content
Top Forums Shell Programming and Scripting Communicating with ethernet to serial LED sign - is this feasible? Post 303042853 by jgt on Wednesday 8th of January 2020 12:07:32 PM
Old 01-08-2020
Device address probably should be one, not zero.

The concept of device address stems from RS485 serial communications that allow for daisy chained devices.


Are there possibly dip switches or a ROM config process to set the device address?
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

How to use 2 Proccess communicating with each other using 2 pipe

Hi, Guys ... I want to know how to use to 2 processes (A & B) communicating with each others through 2 pipes (Pipe1 & Pinpe2) : such that process A write to Pipe1 and Process B read from Pipe1 and process B write to Pipe2 and Process A read from Pipe2 . Does anyone have an idea about... (1 Reply)
Discussion started by: someone33
1 Replies

2. Shell Programming and Scripting

Sign on/Sign off logging script

I'd like to make a script that I can execute every time I sign on to my linux box that keeps track of the time and allows to me to add a remark to a file. So basically once I log in, I run the script, and it outputs the date and time to a text file (log.txt). But that isn't my problem. I need... (1 Reply)
Discussion started by: Glider
1 Replies

3. UNIX for Advanced & Expert Users

Communicating with Serial Port

I am using system running on red hat linux 4. I had connected health measuring machine to the serial port and configured it stty -F /dev/ttyS0 9600 -parenb cs8 -cstopb this machine requires a command to be passed to it for giving output. I am unable to pass command hexa format(0x68) to the... (4 Replies)
Discussion started by: netsavant
4 Replies

4. UNIX for Dummies Questions & Answers

Communicating Via Terminals With Other Computers

Hello, I would like to know if it is possible to communicate between two terminals on seperate computers for free - e.g. not using proprietary software or using the built in UNIX terminals on operating systems of the UNIX flavor. Thanks, photray94 (2 Replies)
Discussion started by: photray94
2 Replies

5. AIX

how to know my serial port is communicating and running fine

i want to know that my serial port ( pci slot with 2 port ) is working fine and communicating is there any way to know the serialport is working and communicating? please help (3 Replies)
Discussion started by: pchangba
3 Replies

6. Ubuntu

Ubuntu 9.04 Serial application to telnet to serial device

Hello! I am working on an application which reads environmental instruments which have serial ports. The application requires a serial port to be present to talk to the device (i.e. /dev/ttyS0 ). In some instances the environmental devices will be 100's of yards away from the computer, so a... (5 Replies)
Discussion started by: mvona
5 Replies

7. Programming

ERROR while communicating with gmail

$./a.out smtp.gmail.com 25 220 mx.google.com ESMTP 9sm2923369yxf.23 250 mx.google.com at your service 220 2.0.0 Ready to start TLS after handshake Common Name: smtp.gmail.com after get cert dn -----BEGIN SSL SESSION PARAMETERS-----... (0 Replies)
Discussion started by: darshan.ghumare
0 Replies

8. IP Networking

Need a bridge from an ethernet interface to a serial interface

This is my situation DOS pc serial cable (sl0) Linux Pc eth1 192.168.0.10 <-------------------->192.168.0.2 <------------>192.168.0.1 (router) I connected the linux pc and the dos pc with a SLIP (serial line internet protocol), so they can communicate in the sl0 interface. ... (3 Replies)
Discussion started by: mghis
3 Replies

9. Programming

Child threads communicating with main thread via pipes

I have a simple client/server program I am using for learning purposes. I have it setup so that after server is setup and listening it than goes into a loop where it accepts incoming client connections. After each connection, the client socket is than passed to a thread routine where it can be... (3 Replies)
Discussion started by: Majortom71
3 Replies

10. Shell Programming and Scripting

Script to send serial commands over ethernet

Hi there, I have a Debian server (192.168.1.1) connected through ethernet to a RS232 device servers (192.168.1.5) that is then connected through RS232 to a Video Projector. The idea is that I want to send commands to the video projector (eg. turn on/off) via the device server. According to... (4 Replies)
Discussion started by: chebarbudo
4 Replies
ddi_peek(9F)						   Kernel Functions for Drivers 					      ddi_peek(9F)

NAME
ddi_peek, ddi_peek8, ddi_peek16, ddi_peek32, ddi_peek64, ddi_peekc, ddi_peeks, ddi_peekl, ddi_peekd - read a value from a location SYNOPSIS
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_peek8(dev_info_t *dip, int8_t *addr, int8_t *valuep); int ddi_peek16(dev_info_t *dip, int16_t *addr, int16_t *valuep); int ddi_peek32(dev_info_t *dip, int32_t *addr, int32_t *valuep); int ddi_peek64(dev_info_t *dip, int64_t *addr, int64_t *valuep); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). The ddi_peekc(), ddi_peeks(), ddi_peekl(), and ddi_peekd() functions are obsolete. Use, respectively, ddi_peek8(), ddi_peek16(), ddi_peek32(), and ddi_peek64(), instead. PARAMETERS
dip A pointer to the device's dev_info structure. addr Virtual address of the location to be examined. valuep Pointer to a location to hold the result. If a null pointer is specified, then the value read from the location will simply be discarded. DESCRIPTION
These routines cautiously attempt to read a value from a specified virtual address, and return the value to the caller, using the parent nexus driver to assist in the process where necessary. If the address is not valid, or the value cannot be read without an error occurring, an error code is returned. The routines are most useful when first trying to establish the presence of a device on the system in a driver's probe(9E) or attach(9E) routines. RETURN VALUES
DDI_SUCCESS The value at the given virtual address was successfully read, and if valuep is non-null, *valuep will have been updated. DDI_FAILURE An error occurred while trying to read the location. *valuep is unchanged. CONTEXT
These functions can be called from user or interrupt context. EXAMPLES
Example 1: Checking to see that the status register of a device is mapped into the kernel address space: if (ddi_peek8(dip, csr, (int8_t *)0) != DDI_SUCCESS) { cmn_err(CE_WARN, "Status register not mapped"); return (DDI_FAILURE); } Example 2: Reading and logging the device type of a particular device: int xx_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { ... /* map device registers */ ... if (ddi_peek32(dip, id_addr, &id_value) != DDI_SUCCESS) { cmn_err(CE_WARN, "%s%d: cannot read device identifier", ddi_get_name(dip), ddi_get_instance(dip)); goto failure; } else cmn_err(CE_CONT, "!%s%d: device type 0x%x ", ddi_get_name(dip), ddi_get_instance(dip), id_value); ... ... ddi_report_dev(dip); return (DDI_SUCCESS); failure: /* free any resources allocated */ ... return (DDI_FAILURE); } SEE ALSO
attach(9E), probe(9E), ddi_poke(9F) Writing Device Drivers NOTES
The functions described in this manual page previously used symbolic names which specified their data access size; the function names have been changed so they now specify a fixed-width data size. See the following table for the new name equivalents: +-----------------------------------------------------------+ |Previous Name New Name | | ddi_peekc ddi_peek8 | | ddi_peeks ddi_peek16 | | ddi_peekl ddi_peek32 | | ddi_peekd ddi_peek64 | +-----------------------------------------------------------+ SunOS 5.10 27 Sep 2002 ddi_peek(9F)
All times are GMT -4. The time now is 02:00 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy