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establishing connection with e-kermit running on LINUX from my operating system

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Operating Systems Linux Ubuntu establishing connection with e-kermit running on LINUX from my operating system
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Old 10-23-2011
Question establishing connection with e-kermit running on LINUX from my operating system
we designed a primitive operating system for learning basics fundamentals and we created process switching, interrupt/polled IO for device drivers like UART and printers. We accomplish this by using our own tools called SPEDE (for downloading compiled elf image from host ubuntu system that have SPEDE specific old c compiler to the target system RAM using UART com1 port). One of my project work is to extend this to write device drivers for IDE and integrate file system say FAT16 and download files from host to target using another UART cable-connection.
url is
github.com/bicepjai/nanos/tree/master/nanos_src

I am in the last part of downloading and used simple e-kermit to download files from host to target, but i am facing problems like data loss in transmission. I have taken out all the extra code and have the code just for downloading files from host to target in
the url is
github.com/bicepjai/nanos/tree/master/download_file_uart

The code have some printf statements, but they are omitted since it takes more time to execute. I have disabled the interrupt driven system and using polled IO for preventing any kind of loss. still i have data loss in transmission and have been trying to get over it for more than a month.

Any suggestions will be much appreciated.
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LEARN ABOUT MINIX

lpt

LPT(4)							   BSD Kernel Interfaces Manual 						    LPT(4)

NAME

     lpt -- generic printer device driver

SYNOPSIS

     device ppc
     device ppbus
     device lpt

DESCRIPTION

     The current lpt driver is the port of the original lpt driver to the ppbus(4) system.

     One purpose of this port was to allow parallel port sharing with other parallel devices.  Secondly, inb()/outb() calls have been replaced by
     ppbus function calls.  lpt is now arch-independent thanks to the ppbus interface.	See ppbus(4) for more info about the ppbus system.

     The parallel port bus is allocated by lpt when the printer device is opened and released only when the transfer is completed: either when the
     device is closed or when the entire buffer is sent in interrupt driven mode.

     The driver can be configured to be either interrupt-driven, or to poll the printer.  Ports that are configured to be interrupt-driven can be
     switched to polled mode by using the lptcontrol(8) command.

     Depending on your hardware, extended capabilities may be configured with the lptcontrol(8) command.  With an ECP/ISA port, you can take
     advantage of FIFO and DMA.

     In order to retrieve printer info from /dev/lpt0, just apply the cat command to the device.  If the printer supports IEEE1284 nibble mode and
     has data to send to the host, you will get it.

FILES

     /dev/lpt0			       first parallel port driver

SEE ALSO

     ppbus(4), ppc(4), lptcontrol(8)

HISTORY

     This driver replaces the functionality of the lpa driver, which is now defunct.

BUGS

     There are lots of them, especially in cheap parallel port implementations.

     It is only possible to open a lpt port when a printer is connected and on-line, making it impossible to run lptcontrol(8) when there is no
     printer connected.

     This driver could still stand a rewrite.

BSD
								 February 14, 1999							       BSD