Cirrus-logic AN298 Manuel d'utilisateur

Copyright  Cirrus Logic, Inc. 2013(All Rights Reserved)http://www.cirrus.comCS485xx Firmware User’s Manual: General Overview and Common Firmware Modu

AN298RC14 109* = 2, 4, or 6 for the three different memory maps** = revision number for codeAudyssey Adaptive Bass eXtension (ABX) Module(ANPPMT)V06 0

AN298RC14 11 2.4 Firmware Modules and Associated Application NotesTable 2-2. OS Version/Memory Map by ProductProduct OS OS Version/Memory Map Support

12 AN298RC143 Firmware Messaging 3 Firmware MessagingWhile using the CS485xx, it is necessary to communicate with the DSP in order to control or monit

AN298RC14 13 3.1 Communication OverviewThe following diagram provides shows the format of a solicited read message:3.1.3 Unsolicited MessageThe DSP ne

14 AN298RC144 Operating System (OS) Firmware Module 4 Operating System (OS) Firmware ModuleIndices of the Firmware Module can differ in properties tha

AN298RC14 15 4.2 OS ManagerTable 4-1. OS Module APIIndex Variable Description0x0000 KICKSTART Bit 22: 0/1 Disable/Enable unsolicited message on sampl

16 AN298RC144.2 OS Manager 0x0003 SAMPLE_RATE† Set by hostBits 3:0 Sample Rate0x0 = 48 kHz0x1 = 44.1 kHz0x2 = 32 kHz0x3 = <Reserved>0x4 = 96 kHz

AN298RC14 17 4.3 OS Manager in DSP Composer4.3 OS Manager in DSP ComposerMost configuration information described in Section 4.2 can be controlled in

18 AN298RC144.4 Unsolicited Messages Table 4-2. Unsolicited MessagesIndex Message Description0x0000 MALLOC_FAILURE Bits 19:161 = MALLOC_ERROR_REQ_LIS

AN298RC14 19 5 Audio Manager Firmware Module5 Audio Manager Firmware Module5.1 OverviewThe Audio Manager Firmware module provides the ability for the

2 AN298RC141 Document Strategy 1 Document StrategyThe CS485xx has been designed with an inherent flexibility in terms of firmware usage. Each instance

20 AN298RC145.2 Audio Manager 0x000D Reserved Reserved0x000E CHAN_8_TRIM† 0x00000000–0x80000000 (0.0 to 1.0)Volume trim for channel 8 (Left Downmix Ch

AN298RC14 21 5.3 Audio Manager in DSP Composer Environment* This is only available on the CS48520.** This is only available on the CS48540 and CS48560

22 AN298RC145.4 DSP Composer Sample Projects 5.4 DSP Composer Sample ProjectsSample projects for various firmware applications have been provided in

AN298RC14 23 6 PCM Firmware Module6 PCM Firmware Module6.1 OverviewThe PCM firmware module provides routing and control functions for stereo and multi

24 AN298RC146.2 PCM Manager * Not available on the CS48520.** Not available on the CS48520 and CS48540.0x0008 IO_BUFF_CH7_SOURCE* Input Source for Cha

AN298RC14 25 6.3 PCM Manager in DSP Composer6.3 PCM Manager in DSP ComposerAll configuration information described in Section 6.2 can be controlled i

26 AN298RC146.4 PCM Module Notes 6.4 PCM Module NotesThe following are the possible PCM input modes:• Stereo Mode: Stereo PCM into DAI_D4. 2 Channel

AN298RC14 27 7 Low Power Mode7Low Power ModeNote: The Low Power Mode section will be moving to the CS485xx Hardware User’s Manual in the next revision

28 AN298RC147.3 Getting Out of Low Power Mode Table 7-1. wakeup_uld .uld Options ValuesWAKEUP_P2.ULD 080044090000000200000000b485aa01ffffffff437a11f5

AN298RC14 29 8 Watchdog Timer8 Watchdog TimerThe CS485xx has an integrated hardware watchdog timer that acts as a “health” monitor for the DSP. The wa

AN298RC14 3 2 Overview2 OverviewThe firmware that runs on this device expects a stereo or multi-channel PCM input source. This section describes the d

30 AN298RC149 Document Revisions 9 Document RevisionsRevision Date ChangesRC1 December, 2006 Initial ReleaseRC2 September, 2007 Updated KICKSTART and

4 AN298RC142.2 Code Image (.uld) Files 2.2 Code Image (.uld) FilesEach overlay is a separate code image file (.uld) that is loaded individually into

AN298RC14 5 2.3 Download SequenceThis variable is the specific memory map for the various overlays and can be specific to a particular version of ROMC

6 AN298RC142.3 Download Sequence Figure 2-2. Download SequenceStep 2 (optional): Download a matrix processing module (e.g. Crossbar Mixer, Pro Logic I

AN298RC14 72.4 Firmware Modules and Associated Application NotesTable 2-1. Firmware Module Read and Write Addresses with Associated Application Note

AN298RC14 8Virtualizer-Processor Overlay: (Continued)SRS TruSurround XT®(AN298VPMH)V01 0xBA00HHHH 0xhhhhhhhh 0xBAC0HHHH 0x3AC0HHHH 0xhhhhhhhhDolby He

AN298RC14 9Post Processing Overlays:(Continued)Cinema Re-EQ(AN298PPMK)All20xDC00HHHH 0xhhhhhhhh 0xDCC0HHHH 0x5CC0HHHH 0xhhhhhhhhSRS TruVolume™ Module