74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#if !defined(__IMXRT1052__) && !defined(__IMXRT1062__)
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#ifndef pdb_h_
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#define pdb_h_
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#include "kinetis.h"
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// Multiple input & output objects use the Programmable Delay Block
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// to set their sample rate. They must all configure the same
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// period to avoid chaos.
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#define PDB_CONFIG (PDB_SC_TRGSEL(15) | PDB_SC_PDBEN | PDB_SC_CONT | PDB_SC_PDBIE | PDB_SC_DMAEN)
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#if F_BUS == 120000000
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#define PDB_PERIOD (2720-1)
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#elif F_BUS == 108000000
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#define PDB_PERIOD (2448-1)
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#elif F_BUS == 96000000
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#define PDB_PERIOD (2176-1)
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#elif F_BUS == 90000000
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#define PDB_PERIOD (2040-1)
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#elif F_BUS == 80000000
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#define PDB_PERIOD (1813-1) // small ?? error
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#elif F_BUS == 72000000
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#define PDB_PERIOD (1632-1)
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#elif F_BUS == 64000000
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#define PDB_PERIOD (1451-1) // small ?? error
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#elif F_BUS == 60000000
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#define PDB_PERIOD (1360-1)
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#elif F_BUS == 56000000
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#define PDB_PERIOD (1269-1) // 0.026% error
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#elif F_BUS == 54000000
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#define PDB_PERIOD (1224-1)
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#elif F_BUS == 48000000
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#define PDB_PERIOD (1088-1)
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#elif F_BUS == 40000000
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#define PDB_PERIOD (907-1) // small ?? error
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#elif F_BUS == 36000000
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#define PDB_PERIOD (816-1)
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#elif F_BUS == 24000000
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#define PDB_PERIOD (544-1)
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#elif F_BUS == 16000000
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#define PDB_PERIOD (363-1) // 0.092% error
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#else
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#error "Unsupported F_BUS speed"
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#endif
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#endif
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#endif |