1 files changed, 306 insertions, 0 deletions

diff --git a/keyboards/handwired/promethium/matrix.c b/keyboards/handwired/promethium/matrix.c
new file mode 100644
index 000000000..72dbe8d4d
--- /dev/null
+++ b/keyboards/handwired/promethium/matrix.c
@@ -0,0 +1,306 @@
+/*
+Copyright 2012 Jun Wako
+Copyright 2014 Jack Humbert
+Copyright 2017 Priyadi Iman Nurcahyo
+
+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>
+#if defined(__AVR__)
+#include <avr/io.h>
+#endif
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "timer.h"
+
+
+/* Set 0 if debouncing isn't needed */
+
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+
+#if (DEBOUNCING_DELAY > 0)
+    static uint16_t debouncing_time;
+    static bool debouncing = false;
+#endif
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header()  print("\nr/c 01234567\n")
+#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop(matrix[i])
+#    define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse16(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop16(matrix[i])
+#    define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse32(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop32(matrix[i])
+#    define ROW_SHIFTER  ((uint32_t)1)
+#endif
+
+#ifdef MATRIX_MASKED
+    extern const matrix_row_t matrix_mask[];
+#endif
+
+static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+static const uint8_t tp_pins[3] = TRACKPOINT_PINS;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static void init_cols(void);
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+static void unselect_row(uint8_t row);
+
+__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) {
+}
+
+inline
+uint8_t matrix_rows(void) {
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+    return MATRIX_COLS;
+}
+
+void matrix_init(void) {
+
+    // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
+    #if  (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
+        MCUCR |= _BV(JTD);
+        MCUCR |= _BV(JTD);
+    #endif
+
+    // initialize row and col
+    unselect_rows();
+    init_cols();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+
+    matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void)
+{
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
+
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
+            }
+
+#       else
+            read_cols_on_row(matrix, current_row);
+#       endif
+
+    }
+
+#   if (DEBOUNCING_DELAY > 0)
+        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+                matrix[i] = matrix_debouncing[i];
+            }
+            debouncing = false;
+        }
+#   endif
+
+    matrix_scan_quantum();
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+#if (DEBOUNCING_DELAY > 0)
+    if (debouncing) return false;
+#endif
+    return true;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+
+{
+    return (matrix[row] & ((matrix_row_t)1<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+    // switch blocker installed and the switch is always pressed.
+#ifdef MATRIX_MASKED
+    return matrix[row] & matrix_mask[row];
+#else
+    return matrix[row];
+#endif
+}
+
+void matrix_print(void)
+{
+    print_matrix_header();
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        print_matrix_row(row);
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += matrix_bitpop(i);
+    }
+    return count;
+}
+
+
+#define ROW_MASK 0b11100000
+
+static const uint8_t row_bit[MATRIX_ROWS] = {
+  //  76543210
+    0b00000000,
+    0b00100000,
+    0b01000000,
+    0b01100000,
+    0b10000000,
+    0b10100000,
+    0b11000000,
+    0b11100000,
+};
+
+static void init_cols(void)
+{
+    // columns
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+
+    // rows
+    DDRF  |=  ROW_MASK;
+    PORTF &= ~ROW_MASK;
+
+    // trackpoint
+    for(uint8_t x = 0; x < 3; x++) {
+        uint8_t pin = tp_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
+    {
+        // Store last value of row prior to reading
+        matrix_row_t last_row_value = current_matrix[current_row];
+
+        // Clear data in matrix row
+        current_matrix[current_row] = 0;
+
+        // special case for trackpoint
+        if (current_row == 8) {
+            for(uint8_t tp_index = 0; tp_index < 3; tp_index++) {
+
+                // Select the TP pin to read (active low)
+                uint8_t pin = tp_pins[tp_index];
+                uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+                // Populate the matrix row with the state of the col pin
+                current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << tp_index);
+            }
+            return (last_row_value != current_matrix[current_row]);
+        }
+
+        // Select row and wait for row selecton to stabilize
+        select_row(current_row);
+        _delay_us(5);       // without this wait it won't read stable value.
+        // wait_us(50);
+
+        // For each col...
+        for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+
+            // Select the col pin to read (active low)
+            uint8_t pin = col_pins[col_index];
+            uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+            // Populate the matrix row with the state of the col pin
+            current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
+        }
+
+        // Unselect row
+        unselect_row(current_row);
+
+        return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row)
+{
+    PORTF = row_bit[row] | (PORTF & ~ROW_MASK);
+}
+
+static void unselect_row(uint8_t row)
+{
+}
+
+static void unselect_rows(void)
+{
+}
+