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Diffstat (limited to 'keyboards/converter/hp_46010a/matrix.c')
| -rw-r--r-- | keyboards/converter/hp_46010a/matrix.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/keyboards/converter/hp_46010a/matrix.c b/keyboards/converter/hp_46010a/matrix.c new file mode 100644 index 000000000..2ca7d0357 --- /dev/null +++ b/keyboards/converter/hp_46010a/matrix.c @@ -0,0 +1,244 @@ +/* +Copyright 2018 listofoptions <listofoptions@gmail.com> + +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/>. +*/ + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#if defined(__AVR__) +#include <avr/io.h> +#endif +#include <util/delay.h> + +#include "wait.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" +#include "timer.h" +#include "LUFA/Drivers/Peripheral/SPI.h" + +#include "config.h" + + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#endif + +#if ( DEBOUNCING_DELAY > 0 ) +static uint16_t debouncing_time ; +static bool debouncing = false ; +#endif + +static uint8_t matrix [MATRIX_ROWS] = {0}; + +#if ( DEBOUNCING_DELAY > 0 ) +static uint8_t matrix_debounce_old [MATRIX_ROWS] = {0}; +static uint8_t matrix_debounce_new [MATRIX_ROWS] = {0}; +#endif + +__attribute__ ((weak)) +void matrix_init_quantum(void) { + matrix_init_kb(); +} + +__attribute__ ((weak)) +void matrix_scan_quantum(void) { + matrix_scan_kb(); +} + +__attribute__ ((weak)) +void matrix_init_kb(void) { + matrix_init_user(); +} + +__attribute__ ((weak)) +void matrix_scan_kb(void) { + matrix_scan_user(); +} + +__attribute__ ((weak)) +void matrix_init_user(void) { +} + +__attribute__ ((weak)) +void matrix_scan_user(void) { +} + +// the keyboard's internal wiring is such that the inputs to the logic are +// a clock signal, and a reset line. +// the output is a single output pin. im bitbanging here, but the SPI controller +// would work normally +// +// the device functions, by using the clock signal to count 128 bits, the lower +// 3 bits of this 7 bit counter are tied to a 1-of-8 multiplexer, this forms +// the columns. +// the upper 4 bits form the rows, and are decoded using bcd to decimal +// decoders, so that 14 out of 16 of the outputs are wired to the rows of the +// matrix. each switch has a diode, such that the row signal feeds into the +// switch, and then into the diode, then into one of the columns into the +// matrix. the reset pin can be used to reset the entire counter. + +#define RESET _BV(PB0) +#define SCLK _BV(PB1) +#define SDATA _BV(PB3) +#define LED _BV(PD6) + +inline +static +void SCLK_increment(void) { + PORTB &= ~SCLK ; + _delay_us( 4 ) ; // make sure the line is stable + PORTB |= SCLK ; + _delay_us( 4 ) ; + + return ; +} + +inline +static +void Matrix_Reset(void) { + PORTB |= RESET ; + _delay_us( 4 ) ; // make sure the line is stable + PORTB &= ~RESET ; + + return ; +} + +inline +static +uint8_t Matrix_ReceiveByte (void) { + uint8_t received = 0 ; + uint8_t temp = 0 ; + for ( uint8_t bit = 0; bit < MATRIX_COLS; ++bit ) { + // toggle the clock + SCLK_increment(); + temp = (PINB & SDATA) << 4 ; + received |= temp >> bit ; + } + + return received ; +} + +inline +static +void Matrix_ThrowByte(void) { + // we use MATRIX_COLS - 1 here because that would put us at 7 clocks + for ( uint8_t bit = 0; bit < MATRIX_COLS - 1; ++bit ) { + // toggle the clock + SCLK_increment(); + } + + return ; +} + +void matrix_init () { + // debug_matrix = 1; + // PB0 (SS) and PB1 (SCLK) set to outputs + DDRB |= RESET | SCLK ; + // PB2, is unused, and PB3 is our serial input + DDRB &= ~SDATA ; + + // SS is reset for this board, and is active High + // SCLK is the serial clock and is active High + PORTB &= ~RESET ; + PORTB |= SCLK ; + + // led pin + DDRD |= LED ; + PORTD &= ~LED ; + + matrix_init_quantum(); + + //toggle reset, to put the keyboard logic into a known state + Matrix_Reset() ; +} + +uint8_t matrix_scan(void) { + + // the first byte of the keyboard's output data can be ignored + Matrix_ThrowByte(); + +#if ( DEBOUNCING_DELAY > 0 ) + + for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) { + //transfer old debouncing values + matrix_debounce_old[row] = matrix_debounce_new[row] ; + // read new key-states in + matrix_debounce_new[row] = Matrix_ReceiveByte() ; + + if ( matrix_debounce_new[row] != matrix_debounce_old[row] ) { + debouncing = true ; + debouncing_time = timer_read() ; + } + } + +#else + // without debouncing we simply just read in the raw matrix + for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) { + matrix[row] = Matrix_ReceiveByte ; + } +#endif + + +#if ( DEBOUNCING_DELAY > 0 ) + if ( debouncing && ( timer_elapsed( debouncing_time ) > DEBOUNCING_DELAY ) ) { + + for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) { + matrix[row] = matrix_debounce_new[row] ; + } + + debouncing = false ; + } +#endif + Matrix_Reset() ; + + matrix_scan_quantum() ; + return 1; +} + +inline +uint8_t matrix_get_row( uint8_t row ) { + return matrix[row]; +} + +void matrix_print(void) +{ + print("\nr/c 01234567\n"); + + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + phex(row); print(": "); + print_bin_reverse8(matrix_get_row(row)); + print("\n"); + } +} + +inline +uint8_t matrix_rows(void) { + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) { + return MATRIX_COLS; +} + +// as an aside, I used the M0110 converter: +// tmk_core/common/keyboard.c, quantum/matrix.c, and the project layout of the planck +// the online ducmentation starting from : +// https://docs.qmk.fm/#/config_options +// https://docs.qmk.fm/#/understanding_qmk +// and probably a few i forgot....
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