How to enable multiply serial port sharing irq ?

MyForever · 09-25-2005, 09:09 PM

I am working with a system with 10 serial ports, com1 and com2 are the

stand serial port in the pc , and com 3£_£_£_com6 are extended ports

sharing irq 6 , com7£_£_£_com10 are extended ports sharing irq15 ,

now I want to use them in linux (RH9.0) , com1 and com2 are successful,

but the other 8 coms are not working correctly, I only can send data ,

but can't receive data.

what I do is adding a file named rc.serial in /etc .

Code:

setserial /dev/ttyS2 port 0x300 irq 6 uart 16550A ^fourport
setserial /dev/ttyS3 port 0x308 irq 6 uart 16550A ^fourport
setserial /dev/ttyS4 port 0x310 irq 6 uart 16550A ^fourport
setserial /dev/ttyS5 port 0x318 irq 6 uart 16550A ^fourport
setserial /dev/ttyS6 port 0x320 irq 15 uart 16550A ^fourport
setserial /dev/ttyS7 port 0x328 irq 15 uart 16550A ^fourport
setserial /dev/ttyS8 port 0x330 irq 15 uart 16550A ^fourport
setserial /dev/ttyS9 port 0x338 irq 15 uart 16550A ^fourport

setserial /dev/ttyS2 set_multiport port1 0x340  mask1 0x0F match1 0x0F
setserial /dev/ttyS6 set_multiport port2 0x340  mask2 0xF0 match2 0xF0

the serial port is rs422, what should I do something else to enable them??

maroonbaboon · 09-27-2005, 06:51 AM

Sounds like 1980 all over again! What do you put on there - teletype machines?

Anyway the Serial HOWTO http://www.tldp.org/HOWTO/Serial-HOWTO.html has a section on multiple serial ports. Never used more than two at once myself (and had some problems then I recall

)

MyForever · 09-28-2005, 12:00 AM

Quote:

Originally posted by maroonbaboon
Sounds like 1980 all over again! What do you put on there - teletype machines?

Anyway the Serial HOWTO http://www.tldp.org/HOWTO/Serial-HOWTO.html has a section on multiple serial ports. Never used more than two at once myself (and had some problems then I recall )

thank you!

some serial devices which are in the working condition where there are no screens nor mouse

the embedded system is design to collect some data from serial devices and then send them by network

I know http://www.tldp.org/HOWTO/Serial-HOWTO.html ,and refer to it too.

any other suggestions?