Hi all
I have two linux boxes (2.2.13) each with Hayes-ESP single port
communication accelerator connected by null-modem cable having the length
only of 1 meter:
Rx-----------------------Tx
Tx-----------------------Rx
RTS----------------------CTS
CTS----------------------RTS
GND----------------------GND
I successfully compiled your driver (ver.2.2) as a module and fire-up it
/sbin/insmod /lib/modules/2.2.13/misc/esp.o irq=0,11,0,0,0,0,0,0 \
dma=1 divisor=0,0x1,0,0,0,0,0,0 rx_trigger=900 tx_trigger=800 \
flow_off=1014 flow_on=944 rx_timeout=3 pio_threshold=0
Then I'd like to establish ppp connection between two machines using
ppp-2.3.10. Here is my /etc/ppp/options file
/dev/ttyP8
38400
192.168.1.1:
asyncmap 0
noauth
crtscts
local
mru 768
nodetach
noproxyarp
lcp-echo-interval 30
lcp-echo-failure 4
nodeflate
nobsdcomp
novj
novjccomp
nopcomp
noaccomp
noccp
Everything seems OK. Then I'm testing the line speed.
Setting the port speed at 115200 (divisor=8) I have a resulting ftp speed
11 kbytes/sec. It's OK.
Setting the port speed at 230400 (divisor=4) I have a resulting ftp speed
22 kbytes/sec. It's also OK.
Setting the port speed at 460800 (divisor=2) I have a resulting ftp speed
44 kbytes/sec. It's OK as well.
But setting port speed to it max. value 921600 (divisor=1) I cannot achive
the speed more then 47 kbytes/sec.... It's strange... The quantity of errors
on the line from ifconfig is less then 0.5%. I have watch by oscilloscope
the wave-form of signals on the line and can say that there is really a
signal having the frequency about 920 kHz. Everything seems correct,
but the speed .... :-)
Thanx in advance
Best regards
********************************************************
* Tigran Zakaryan *
* Institute of Radiophysics & Electronics *
* Armenian Ac.Sci., Ashtarak-2 *
* 378410, ARMENIA *
* -----------------------------------------------------*
* Phones: (+374-2) 287850 (office) *
* (+374-2) 278549 (home) *
* E-mail: [EMAIL PROTECTED] *
* Fax: (+1-425) 944-7310 *
* http://www.irphe.am/ *
* http://www.brainbench.com/ (id=37875) *
********************************************************
Best regards
********************************************************
* Tigran Zakaryan *
* Institute of Radiophysics & Electronics *
* Armenian Ac.Sci., Ashtarak-2 *
* 378410, ARMENIA *
* -----------------------------------------------------*
* Phones: (+374-2) 287850 (office) *
* (+374-2) 278549 (home) *
* E-mail: [EMAIL PROTECTED] *
* Fax: (+1-425) 944-7310 *
* http://www.irphe.am/ *
* http://www.brainbench.com/ (id=37875) *
********************************************************
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