73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
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/*
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Copyright 2021 mtei
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// clang-format off
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#if defined(MATRIX_EXTENSION_74HC157)
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# define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb
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# define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb)
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# define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC157
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#elif defined(MATRIX_EXTENSION_74HC153)
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# define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb, MCU_GPIOc, MCU_GPIOd
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# define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb || (dev)==MCU_GPIOc || (dev)==MCU_GPIOd)
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# define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC153
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#endif
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static const pin_t sel_pins[] = { MATRIX_EXT_74HC15x };
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#ifdef MATRIX_GPIO_NEED_SEPARATE_ATOMIC
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# define setMatrixInputHigh(dev, port, bit) \
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do { \
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if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
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setPortBitInputHigh_atomic(port, bit); \
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}
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} while(0)
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#else
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# define setMatrixInputHigh(dev, port, bit) \
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do { \
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if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
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setPortBitInputHigh(port, bit); \
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} \
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} while(0)
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#endif
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LOCAL_FUNC ALWAYS_INLINE void select74HC15x(uint8_t devid);
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LOCAL_FUNC
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void select74HC15x(uint8_t devid) {
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writePin(sel_pins[0], devid&1);
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#if defined(MATRIX_EXTENSION_74HC153)
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writePin(sel_pins[1], devid&2);
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#endif
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}
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LOCAL_FUNC ALWAYS_INLINE port_width_t readPortMultiplexer(uint8_t devid, pin_t port);
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LOCAL_FUNC port_width_t readPortMultiplexer(uint8_t devid, pin_t port) {
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select74HC15x(devid);
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waitInputPinDelay();
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return readPort(port);
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}
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#define readMatrixPort(dev, port) \
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((dev) == MCU_GPIO)? readPort(port): (IS_74HC15x(dev))? readPortMultiplexer((dev)-MCU_GPIOa, port):0
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#define INIT_74HC15X(x) setPinOutput(x); writePinLow(x);
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LOCAL_FUNC
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void init_74hc15x(void) {
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MAP(INIT_74HC15X, MATRIX_EXT_74HC15x)
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}
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#define init_extension() init_74hc15x()
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