[libsigrokdecode.git] / decoders / ac97 / __init__.py

##
## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2017 Gerhard Sittig <gerhard.sittig@gmx.net>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, see <http://www.gnu.org/licenses/>.
##

'''
AC'97 (Audio Codec '97) is a protocol for audio and modem I/O functionality
in mainstream PC systems.

AC'97 communicates full duplex data (SDATA_IN, SDATA_OUT), where bits
are clocked by the BIT_CLK and frames are signalled by the SYNC signals.
A low active RESET# line completes the set of signals.

Frames repeat at a nominal frequency of 48kHz, and consist of 256 bits
each. One 16bit slot contains management information, twelve 20bit slots
follow which carry data for three management and nine audio/modem channels.
Optionally two slots of one frame can get combined for higher resolution
on fewer channels, or double data rate.

Details:
http://download.intel.com/support/motherboards/desktop/sb/ac97_r23.pdf
'''

from .pd import Decoder
Commit	Line	Data
93b92702 GS	1	##
	2	## This file is part of the libsigrokdecode project.
	3	##
	4	## Copyright (C) 2017 Gerhard Sittig <gerhard.sittig@gmx.net>
	5	##
	6	## This program is free software; you can redistribute it and/or modify
	7	## it under the terms of the GNU General Public License as published by
	8	## the Free Software Foundation; either version 2 of the License, or
	9	## (at your option) any later version.
	10	##
	11	## This program is distributed in the hope that it will be useful,
	12	## but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	## GNU General Public License for more details.
	15	##
	16	## You should have received a copy of the GNU General Public License
	17	## along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	##
	19
	20	'''
2787cf2a UH	21	AC'97 (Audio Codec '97) is a protocol for audio and modem I/O functionality
2787cf2a UH	22	in mainstream PC systems.
93b92702 GS	23
	24	AC'97 communicates full duplex data (SDATA_IN, SDATA_OUT), where bits
	25	are clocked by the BIT_CLK and frames are signalled by the SYNC signals.
	26	A low active RESET# line completes the set of signals.
	27
	28	Frames repeat at a nominal frequency of 48kHz, and consist of 256 bits
	29	each. One 16bit slot contains management information, twelve 20bit slots
	30	follow which carry data for three management and nine audio/modem channels.
	31	Optionally two slots of one frame can get combined for higher resolution
	32	on fewer channels, or double data rate.
2787cf2a UH	33
	34	Details:
	35	http://download.intel.com/support/motherboards/desktop/sb/ac97_r23.pdf
93b92702 GS	36	'''
	37
	38	from .pd import Decoder