3d6a1c7b41
* Enable proper reuse of PIO programs Rewrite the PIOProgram helper class to properly re-use loaded programs and to try to re-use loaded instructions before allocating a new PIO program. Supersedes #1524 * Less copy-pasta
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
/*
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RP2040 PIO utility class
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Copyright (c) 2023 Earle F. Philhower, III <earlephilhower@yahoo.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include <hardware/pio.h>
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// Wrapper class for PIO programs, abstracting common operations out
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class PIOProgram {
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public:
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PIOProgram(const pio_program_t *pgm);
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~PIOProgram();
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// Possibly load into a PIO and allocate a SM
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bool prepare(PIO *pio, int *sm, int *offset);
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private:
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const pio_program_t *_pgm;
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PIO _pio;
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int _sm;
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};
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