[pso] [tema2][linux] Cannot trigger RDAI

[Alexandru Tudose]

 - am setat masina virtuala ca com1 si com2 sa fie legate si am testat cu
(cum este descris la FAQ):

# cd /usr/src/linux
# make menuconfig
# make modules
# insmod drivers/serial/serial_core.ko
# insmod drivers/serial/8250.ko

# cat /dev/ttyS1
# echo "hello" > /dev/ttyS0

si merge ok; deci i guess ca serialele sunt configurate cum trebuie.

 - am configurat porturile cele doua porturi cum este descris in
http://www.beyondlogic.org/serial/buff1024.c :

        outb(0x00, devs[ i ].baseport + 1);     /* Turn off interrupts -
UART16550_BASEPORT1 */
        outb(0x80, devs[ i ].baseport + 3);  /* SET DLAB ON */
        outb(0x0c, devs[ i ].baseport + 0);  /* Set Baud rate - Divisor
Latch Low Byte */
        outb(0x00, devs[ i ].baseport + 1);  /* Set Baud rate - Divisor
Latch High Byte */
        outb(0x03, devs[ i ].baseport + 3);  /* 8 Bits, No Parity, 1 Stop
Bit , SET DLAB OFF*/
        outb(0xc7, devs[ i ].baseport + 2);  /* FIFO Control Register */
        outb(0x0b, devs[ i ].baseport + 4);  /* Turn on DTR, RTS, and OUT2
*/
        outb(0x03, devs[ i ].baseport + 1 );  /* Interrupt when data
received */ // RDAI && THREI = 0x03

 - am atasat un handler de interrupt liniilor 4 si 3

 - in momentul cand primesc un write pe com1, depun datele in buffer, dupa
care reactivez intreruperea de THREI:

        outb( 0x02, dev->baseport + 1 );

- primesc THREI, iar in handler scriu totul intr-un while cu:

        outb( devs[ i ].baseport, _next_char_ );



Problema este ca oricum a-si da-o, nu primesc RDAI pe parte cealalta cand
fac un echo pe com1 :-(((

M-ai putea ajuta cu o idee pls?

Multumesc mult!
Alex.
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