RS 485 + komunikacni protokol ?

[Kosta]

To je vse pekne, ale s prechodem na W95/98/00 a hlavne NT, koncite. Pokud
ne, tak jedine s vlastnim driverem. A, mezi nami devcaty,
tady konci sranda a zacina skubani vlasu.

Kosta

kosta@iol.cz
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             Kosta
             P.O.Box 38
             Posta 41
141 00  Praha 4 - Sporilov
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0603 / 33 87 47
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----- Original Message -----
From: Petr Stehlík <petr.stehlik@atlas.cz>
To: Multiple recipients of list <hw-news@list.gin.cz>
Sent: Saturday, April 08, 2000 8:12 PM
Subject: Re: RS 485 + komunikacni protokol ?


> Stejnym spusobem jak je uvedeno dale jsem to vyresil pred 5roky v Qbasicu
> a chodilo to spolehlive bez  problemu ze strany UARTu v PC.
>
> ----- Original Message -----
> From: Straka Matus <magpie@pobox.sk>
> To: Multiple recipients of list <hw-news@list.gin.cz>
> Sent: Saturday, April 08, 2000 12:15 PM
> Subject: RE: RS 485 + komunikacni protokol ?
>
>
> > > >
> > >
> > > Haluz ne, jen draze zaplacene poznani. Skuste poslat prvni bajt s
> natvrdo
> > > nastavenou paritou na 1 a druhy s paritou v 0.
> >
> > No nizsie v maile su zdrojaky v C, ktorymi to realizujem. Na konci
> seriovej
> > linky je 8051 v MultiCPU rezime a funguje mi to. Ovsem prenosove medium
je
> > kabel.
> >
> > > protokol, treba jiz nekolikrat zminovany ProfiBus,
> > > a budu mit jistotu, ze to procpu dratama, TV rozvodem, vzduchem,
modemem
> a
> > > pripadne temer cimko-li jinym.
> >
> > O tom niet pochyb. V pripade, ze chceme pouzit este nejaky medziclanok,
> > naozaj nam neostane nic ine ako pouzit "standardny" protokol.
> >
> > A teraz tie spomenute zdrojaky:
> >
> > #define PORT1 0x2F8  /* Port Address Goes Here */
> > #define INTVECT 0x0B /* Com Port's IRQ here (Must also change PIC
setting)
> > */
> >
> > /* Defines Serial Ports Base Address */
> > /* COM1 0x3F8                        */
> > /* COM2 0x2F8        */
> > /* COM3 0x3E8        */
> > /* COM4 0x2E8        */
> >
> > void send_address(unsigned char b)
> > {
> > outportb(PORT1 + 3 , 43);  /* 8 Bits, Mark Parity , 1 Stop Bit */
> > /* 101011B */
> > outportb(PORT1, b); // Send address
> > delay(3);
> > }
> >
> > void send_data(unsigned char p)
> > {
> > outportb(PORT1 + 3 , 59);  /* 8 Bits, Space Parity, 1 Stop Bit */
> > outportb(PORT1, p); // Send Data
> > delay(3);
> > }
> >
> >
> >
> >
> >
> > void main()
> > {
> > outportb(PORT1 + 1 , 0);        /* Turn off interrupts - Port1 */
> > oldport1isr = getvect(INTVECT); /* Save old Interrupt Vector of later
> > recovery */
> > setvect(INTVECT, PORT1INT);     /* Set Interrupt Vector Entry */
> > /* COM1 - 0x0C */
> > /* COM2 - 0x0B */
> > /* COM3 - 0x0C */
> > /* COM4 - 0x0B */
> > outportb(PORT1 + 3 , 0x80); /* SET DLAB ON */
> > outportb(PORT1 + 0 , 0x18);  /* Set Baud rate - Divisor Latch Low Byte
*/
> > /*         0x06 =  19,200 BPS */
> > /*         0x0C =   9,600 BPS */
> > /*         0x18 =   4,800 BPS */
> > /*         0x30 =   2,400 BPS */
> > outportb(PORT1 + 1 , 0x0);     /* Set Baud rate - Divisor Latch High
Byte
> > */
> > outportb(PORT1 + 3 , 0x03);     /* bolo 0x03, 8 Bits, No Parity, 1 Stop
> Bit
> > */
> > outportb(PORT1 + 2 , 0xC7);     /* FIFO Control Register */
> > outportb(PORT1 + 4 , 0x0B);     /* Turn on DTR, RTS, and OUT2 */
> > outportb(0x21,(inportb(0x21) & 0xF7));  /* Set Programmable Interrupt
> > Controller */ /* COM1 (IRQ4) - 0xEF  */
> > /* COM2 (IRQ3) - 0xF7  */
> > /* COM3 (IRQ4) - 0xEF  */
> > /* COM4 (IRQ3) - 0xF7  */
> > outportb(PORT1 + 1 , 0x01);     /* Interrupt when data received */
> > ..
> > ..
> > ..
> > atd.
> > }
> >
> > Matus Straka
> >
>