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