I am a Beginners for linux ,and i have 2. Close the window for the port that you just tested to speed up the testing of the remaining serial ports. Browse to the Drivers folder and open the bit or the bit folder, depending on your system type. Note that the firmware uses ttyS1 as the serial console on the Maxine and ttyS3 on the others using this driver. Email Newsletter Signup Email me the latest products, deals, contests and promotions. This disables RS half-duplex operation. Test each cable individually.

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2 Port 16C550 Serial and 1 Port EPP/ECP Parallel Slot Saver PCI Card

Reorient the receiving antenna. This disables RS half-duplex operation. Prior to installing this device, ensure that your operating system is up to date for example, you have installed the most recent service pack.

Contents 1 Introduction 2 Hardware Configuration 2. Are you new to LinuxQuestions. I use embedded system linux ,now,the hardware should modified,and linux kernel should from 2.

Select the appropriate folder for your operating system. Select the Let me pick from a list of device drivers on my computer option.

Linux source code: drivers/tty/serial/c (v) – Bootlin

If you have a card like this, say Y here, otherwise say N. 16c5550 enabling this option you take advantage of dma feature available with the omap-serial driver.


The time now is On-board logic automatically controls transmit enable for half duplex operation. Please, contact Technologic Systems to arrange for any repair service and to obtain repair charge information.

You must select at least one bus for the driver to be built. When the session is open, anything you type into it you should see. The ttySn nodes are legally reserved for the serial driver but are often misused by other serial drivers. The question does not have to be directly related to Linux and any language is fair game. Find More Posts by first The loopback test fails when you cannot see what you are typing.

In Device Managerunder the appropriate heading, confirm that your expansion card is listed and that there isn’t an exclamation mark next to it. Say ‘Y’ here if you wish to use the on-board serial port. Ljnux is enabled with “earlycon” on the kernel command line. If you would like to use them, you must answer Y or M to this option. If you’d like to contribute content, let us know.

It is found e. This limited warranty does not cover damages resulting from lightning or other power linjx, misuse, abuse, abnormal conditions of operation, or attempts to alter or modify the function of the product.


I know the hardware and related aspects have been pretty stable on the PC architecture for decades. To check whether or not an RS serial port is working, perform an RS loopback test by doing the following: DMA support can be enabled from platform data.

Use the setserial utility to 166c550 sure the TSISO serial ports are configured properly, or to change any parameter. Please visit this page to clear all LQ-related cookies.

TS-ISO – Technologic Systems Manuals

Make a new iso image to install my modified kernel. When you test the serial or parallel ports and serial or parallel device, it is recommended that you do the following: If the loopback test fails, make sure that the serial cable or gender changer that you are using works and that the adapter is in the correct port. Follow the on-screen prompts to install the device drivers and restart the computer when prompted.