473,811 Members | 2,851 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Serial Port commmunications

Hi everyone!

I need your help! I'm writting a program to comunicates a PC with a
PinPad trought serial port... I'm using _bios_serialcom from bios.h...
But when I tried to send some data it doesn't work and the return code
from _bios_serialcom starts with 8... I don't know what I'm doing
wrong... Any help would be appreciate!

Here is my fuction sendcommand:

sendcommand(uns igned serial_port, char *pString, short nStringLen)
{
short i;
short nComStatus;

for(i = 0; i < nStringLen; i++)
nComStatus = _bios_serialcom (_COM_SEND, serial_port, pString[i]);

return(nComStat us);
}
Thanks in advance!

Mar 6 '06 #1
2 1586
Hugo wrote:
Hi everyone!

I need your help! I'm writting a program to comunicates a PC with a
PinPad trought serial port... I'm using _bios_serialcom from bios.h...
But when I tried to send some data it doesn't work and the return code
from _bios_serialcom starts with 8... I don't know what I'm doing
wrong... Any help would be appreciate!

Here is my fuction sendcommand:

sendcommand(uns igned serial_port, char *pString, short nStringLen)
{
short i;
short nComStatus;

for(i = 0; i < nStringLen; i++)
nComStatus = _bios_serialcom (_COM_SEND, serial_port, pString[i]);

return(nComStat us);
}
Thanks in advance!

Since the standard C language knows not of concepts like `serial port',
you'll have to ask this in a forum specific to your platform.[1]

HTH,
--ag

[1] Had you read the FAQ (easily found, GIYF) or lurked (as any
prospective poster should) you would have known this. Now you do.

--
Artie Gold -- Austin, Texas
http://goldsays.blogspot.com
"You can't KISS* unless you MISS**"
[*-Keep it simple, stupid. **-Make it simple, stupid.]
Mar 6 '06 #2
Hugo wrote:
Hi everyone!

I need your help! I'm writting a program to comunicates a PC with a
PinPad trought serial port... I'm using _bios_serialcom from bios.h...
But when I tried to send some data it doesn't work and the return code
from _bios_serialcom starts with 8... I don't know what I'm doing
wrong... Any help would be appreciate!


<snip>

Standard C (which is what we discus here) does not have bios.h or
_bios_serialcom . You need to ask in a group dedicated to your system
whatever that may be. For more information on this group, see the link
in my sig and the other things it links to.
--
Flash Gordon, living in interesting times.
Web site - http://home.flash-gordon.me.uk/
comp.lang.c posting guidelines and intro:
http://clc-wiki.net/wiki/Intro_to_clc
Mar 7 '06 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
9096
by: ^CeFoS^ | last post by:
Hello to everybody, I've done an application that draws in a frame the trajectory of a robot. The robot position is readed through the serial port, and several commands are wrote through the same port to change the direction of the robot. The trajectory frame is managed by an applet, and the project works good when the applet is called by a html document allocated in the same local machine under W98 where the classes and the serial port...
2
13202
by: willie | last post by:
Hi, I'm writing a program which requires the use of three serial ports and one parallel port. My application has a scanning devices on each port, which I can access fine with pyserial. However, I'm unsure of how exactly I should be designing the program, I thought I could use threading to start class: class scanner(Thread): def __init__(self,port):
3
5056
by: collinm | last post by:
hi i send a command to a led display, the led display is suppose to return me some character i write a string on a serial port void ledDisplayExist() { char msg={'\0', '\0', '\0', '\0', '\0', '\1', 'Z', '0', '0',
13
4836
by: Al the programmer | last post by:
I need to access the serial ports on my webserver from an asp.net page. I have no problem accessing the serial ports from a windows form application, but the code doesn't work in asp.net. I have been told it is not possible to access the serial ports from asp.net. The application is used to control custom hardware. The hardware is connected to a PC through serial ports. Our customer wants to control the hardware from a remote...
4
11209
by: joe bloggs | last post by:
I am writing a mobile application to interface with a legacy system and I am planning to use web services to communicate with this system. The legacy system receives data through a serial port. What I would like to do is make the serial port accessible via a web service. The web service and the legacy application would be running on the same machine. The mobile application would access the web service via a network connection. It...
4
17826
by: Frank | last post by:
Hello, how to get information about all serial ports in the PC? I use the following code, but i got only the data of the FIRST serial port. All other serial port information are not available with this code sample: ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * from WIN32_SerialPort");
13
6215
by: Rob | last post by:
Hi all, I am fairly new to python, but not programming and embedded. I am having an issue which I believe is related to the hardware, triggered by the software read I am doing in pySerial. I am sending a short message to a group of embedded boxes daisy chained via the serial port. When I send a 'global' message, all the connected units should reply with their Id and Ack in this format '0 Ack' To be certain that I didn't miss a...
4
11813
by: rowan | last post by:
I'm writing a driver in Python for an old fashioned piece of serial equipment. Currently I'm using the USPP serial module. From what I can see all the serial modules seem to set the timeout when you open a serial port. This is not what I want to do. I need to change the timeout each time I do a "read" on the serial port, depending on which part of the protocol I've got to. Sometimes a return character is expected within half a second,...
6
6672
by: terry | last post by:
Hi, I am trying to send a character to '/dev/ttyS0' and expect the same character and upon receipt I want to send another character. I tired with Pyserial but in vain. Test Set up: 1. Send '%' to serial port and make sure it reached the serial port. 2. Once confirmed, send another character.
0
9722
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10644
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
10393
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10124
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
1
7664
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6882
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5550
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5690
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
3
3015
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.