- /*
- Copyright 2021 mtei
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- // clang-format off
-
- #if defined(MATRIX_EXTENSION_74HC157)
- # define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb
- # define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb)
- # define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC157
- #elif defined(MATRIX_EXTENSION_74HC153)
- # define MATRIX_DEVICES MCU_GPIOa, MCU_GPIOb, MCU_GPIOc, MCU_GPIOd
- # define IS_74HC15x(dev) ((dev)==MCU_GPIOa || (dev)==MCU_GPIOb || (dev)==MCU_GPIOc || (dev)==MCU_GPIOd)
- # define MATRIX_EXT_74HC15x MATRIX_EXTENSION_74HC153
- #endif
-
- static const pin_t sel_pins[] = { MATRIX_EXT_74HC15x };
-
- #ifdef MATRIX_GPIO_NEED_SEPARATE_ATOMIC
- # define setMatrixInputHigh(dev, port, bit) \
- do { \
- if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
- setPortBitInputHigh_atomic(port, bit); \
- }
- } while(0)
- #else
- # define setMatrixInputHigh(dev, port, bit) \
- do { \
- if ((dev) == MCU_GPIO || IS_74HC15x(dev)) { \
- setPortBitInputHigh(port, bit); \
- } \
- } while(0)
- #endif
-
- LOCAL_FUNC ALWAYS_INLINE void select74HC15x(uint8_t devid);
- LOCAL_FUNC
- void select74HC15x(uint8_t devid) {
- writePin(sel_pins[0], devid&1);
- #if defined(MATRIX_EXTENSION_74HC153)
- writePin(sel_pins[1], devid&2);
- #endif
- }
-
- LOCAL_FUNC ALWAYS_INLINE port_width_t readPortMultiplexer(uint8_t devid, pin_t port);
- LOCAL_FUNC port_width_t readPortMultiplexer(uint8_t devid, pin_t port) {
- select74HC15x(devid);
- waitInputPinDelay();
- return readPort(port);
- }
-
- #define readMatrixPort(dev, port) \
- ((dev) == MCU_GPIO)? readPort(port): (IS_74HC15x(dev))? readPortMultiplexer((dev)-MCU_GPIOa, port):0
-
- #define INIT_74HC15X(x) setPinOutput(x); writePinLow(x);
- LOCAL_FUNC
- void init_74hc15x(void) {
- MAP(INIT_74HC15X, MATRIX_EXT_74HC15x)
- }
- #define init_extension() init_74hc15x()
-
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