A56(1) General Commands Manual A56(1)NAME
A56 - Motorola DSP56001 assembler
SYNOPSIS
a56 [-b] [-l] [-o output-file] file [...]
DESCRIPTION
This manual page documents briefly the a56 command.
a56 is an assembler for the Motorola DSP56001 family of microcontrollers. It is capable of compiling the firmware used in Linux dsp56k.c
driver.
OPTIONS -b Adds binary to the listing.
-l Causes included files to be listed.
-o Directs the output to the specified file rather than the default.
AUTHORS
Copyright (C) 1990-1998 Quinn C. Jensen. This manual page was written by Denis Briand <denis@narcan.fr>, for the Debian GNU/Linux system
(but may be used by others).
April 28, 2010 A56(1)
Check Out this Related Man Page
DSP56K(4) Linux Programmer's Manual DSP56K(4)NAME
dsp56k - DSP56001 interface device
SYNOPSIS
#include <asm/dsp56k.h>
ssize_t read(int fd, void *data, size_t length);
ssize_t write(int fd, void *data, size_t length);
int ioctl(int fd, DSP56K_UPLOAD, struct dsp56k_upload *program);
int ioctl(int fd, DSP56K_SET_TX_WSIZE, int wsize);
int ioctl(int fd, DSP56K_SET_RX_WSIZE, int wsize);
int ioctl(int fd, DSP56K_HOST_FLAGS, struct dsp56k_host_flags *flags);
int ioctl(int fd, DSP56K_HOST_CMD, int cmd);
CONFIGURATION
The dsp56k device is a character device with major number 55 and minor number 0.
DESCRIPTION
The Motorola DSP56001 is a fully programmable 24-bit digital signal processor found in Atari Falcon030-compatible computers. The dsp56k
special file is used to control the DSP56001, and to send and receive data using the bidirectional handshaked host port.
To send a data stream to the signal processor, use write(2) to the device, and read(2) to receive processed data. The data can be sent or
received in 8, 16, 24, or 32-bit quantities on the host side, but will always be seen as 24-bit quantities in the DSP56001.
The following ioctl(2) calls are used to control the dsp56k device:
DSP56K_UPLOAD
resets the DSP56001 and uploads a program. The third ioctl(2) argument must be a pointer to a struct dsp56k_binary with members bin
pointing to a DSP56001 binary program, and len set to the length of the program, counted in 24-bit words.
DSP56K_SET_TX_WSIZE
sets the transmit word size. Allowed values are in the range 1 to 4, and is the number of bytes that will be sent at a time to the
DSP56001. These data quantities will either be padded with zero bytes, or truncated to fit the native 24-bit data format of the
DSP56001.
DSP56K_SET_RX_WSIZE
sets the receive word size. Allowed values are in the range 1 to 4, and is the number of bytes that will be received at a time from
the DSP56001. These data quantities will either truncated, or padded with a null byte (' ') to fit the native 24-bit data format
of the DSP56001.
DSP56K_HOST_FLAGS
read and write the host flags. The host flags are four general-purpose bits that can be read by both the hosting computer and the
DSP56001. Bits 0 and 1 can be written by the host, and bits 2 and 3 can be written by the DSP56001.
To access the host flags, the third ioctl(2) argument must be a pointer to a struct dsp56k_host_flags. If bit 0 or 1 is set in the
dir member, the corresponding bit in out will be written to the host flags. The state of all host flags will be returned in the
lower four bits of the status member.
DSP56K_HOST_CMD
sends a host command. Allowed values are in the range 0 to 31, and is a user-defined command handled by the program running in the
DSP56001.
FILES
/dev/dsp56k
SEE ALSO
linux/include/asm-m68k/dsp56k.h, linux/drivers/char/dsp56k.c, <http://dsp56k.nocrew.org/>, DSP56000/DSP56001 Digital Signal Processor
User's Manual
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-08-05 DSP56K(4)