DSP Services

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Revision as of 07:42, 29 March 2015 by Purpasmart (talk | contribs) (Undo revision 12136 by Purpasmart (talk))
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DSP service "dsp::DSP"

Command Header Description
0x00010040 RecvData(chan 0-3)
0x00020040 RecvDataIsReady(chan 0-3)
0x00030080 SendData(chan 0-3)
0x00040040 SendDataIsEmpty(chan 0-3)
0x0005... ?
0x0006... ?
0x0007.... WriteReg0x10 SetSemaphore
0x00080000 GetSemaphore
0x00090040 ClearSemaphore
0x000A.... WriteReg0x18
0x000B0000 CheckSemaphoreRequest
0x000C0040 ConvertProcessAddressFromDspDram
0x000D0082 WriteProcessPipe
0x001000C0 ReadPipeIfPossible
0x001100C2 LoadComponent. This requires RSA-signed DSP firmware specified via the input buffer for this command, the firmware data is eventually written to DSPmem+0(0x1FF00000).
0x00120000 UnloadComponent
0x00130082 FlushDataCache (The buffer must be located in the 0x14000000 region)
0x00140082 InvalidateDCache (The buffer must be located in either the 0x14000000 region, or the DSP memory region)
0x00150082 RegisterInterruptEvents(param0, param1, 0, eventhandle)
0x00160000 GetSemaphoreEventHandle
0x00170040 SetSemaphoreMask
0x00180040 GetPhysicalAddress (0x14000000+ -> 0x20000000+, 0x1FF00000+ -> 0x1FF00000+, 0x08000000-0x0E000000 -> 0x00000000+, 0 otherwise)
0x00190040 GetVirtualAddress (0x20000000+ -> 0x14000000+, 0x1FF00000+ -> 0x1FF00000+, 0 otherwise)
0x001A0042 SetIirFilterI2S1. Wrapper for cdc:DSP cmd 1
0x001B0042 SetIirFilterI2S1. Wrapper for cdc:DSP cmd 2
0x001C0082 SetIirFilterEQ. Wrapper for cdc:DSP cmd 3
0x001D.... Wrapper for cdc:DSP cmd 4
0x001E.... Wrapper for cdc:DSP cmd 5
0x001F0000 GetHeadphoneStatus. Wrapper for cdc:DSP cmd 6
0x0020.... Wrapper for cdc:DSP cmd 8
0x00210000 GetIsDspOccupied returns a byte (can be 1 or 0) can be set to 1 in LoadComponent

This is the main service for playing audio. The CSND service can be used for playing audio as well, however most processes use this DSP service for playing audio. The DSP and CSND hardware can play audio simultaneously.