Roland RAP-10 Music Card Device Driver for Eisa Bus
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PURPOSE
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This directory contains a sample device driver for IRIX 5.2 EISA bus.
In particular, this device driver is used to demonstrate:
- Writing a character device driver for EISA bus.
- How to obtain an Interrupt number (IRQ)
- How to allocate and program EISA DMA chipsets.
- How to program Eisa Dma channels for hardware recognition.
- How to use EISA Dma chips to move data from/to a device.
- How to manage and use a circular buffers between kernel and
user's read/write calls.
- and many more ..
Driver Installation:
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You should have the following files:
rap.c: The driver source code.
rap.h: The driver's header file.
record.c: The program to records a song.
play.c: The program to Play a previously recorded song.
rapMap.c: Sample program to use mmap() to access the card.
Makefile: The 'make' file to compile everything.
It is better to make a sub-directory for these files and
copy them there.
Copy your current unix to a safe place (ie. cp /unix /usr/unix.orig)
and compile the programs by typing:
make all
Select an unused major number to assign for Rap card (refer
to your sys/major.h file). Once you have an unused major number,
(assuming the number you have is <major>) do the following to
install the driver:
Login as root and do:
mknod /dev/rap c <major> 0
cp rap.o /var/sysgen/boot
cp rap.master /var/sysgen/master.d
cp rap.sm /var/sysgen/system
autoconfig -f -v
reboot
If you do not have /var/sysgen, then try /usr/var/sysgen directory.
Recording and Playback of a song
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Connect a CD player to the Mic/Line connector using a standard
RCA connectors as follow: You need two cables, each with one
RCA male connectors in one end and one RCA male connector on
another end. Use two RCA male-to-male connectros to connect
the two-connector ends of the cable together. Now, connect one
single-connector to Mic/Line of the Rap-10 board and another
one to the Headphone of the CD player. Start the CD (either
through the start button on CD player or from a separate
CD player program) and type "record <file_name>", where
<file_name> is the name of the file in which the song will be
recorded. You can stop the recording by entering a Ctrl-C at
any time. You can hear the song while it is being recorded
by connecting a headphone to the Out connector of the Rap-10
card.
To play back, connect a headphone to Out connector of the
Rap-10 card. Then enter "play <file_name>".
TECHNICAL REFERENCES:
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Roland RAP-10 Technical Reference and Programmer's Guide, Ver. 1.1
IRIX Device Driver Programming Guide
IRIX Device Driver Reference Pages.
Intel 82357 Preliminary Reference, Section: 3.7.8 Mode Register (pp: 223)
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Copyright 1994, Silicon Graphics Inc., Mountain View, CA.
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