Dear All,

I have AT91SAM9G20-EK with Linux(Angstrom distro). In linux, /dev directory I have ttyS0,ttyS1 and ttyS2 files. The device files tty(S3-S6) are not persist.

1.But I want to access the ttyS3,ttyS4,ttyS5 and ttyS6 also, through linux. So,I have created the device file using "mknod" its not working.....

2.I have deleted some tty file and taken the major and minor number and created a ttyS3 file with those numbers its also not working.....

Please help me to access all UART ports(7) through /dev/tty(S3-S6)!!!!?