[Keyboard] Pearl Refactors (#5907)

* use pragma once

* remove custom matrix

* remove custom i2c code in favor of QMK's i2c_master

* rename to all lower case readme

* update readme

* turn off bootmagic as it doesn't work anyway

* Update keyboards/pearl/readme.md

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

1 files changed, 0 insertions, 106 deletions

diff --git a/keyboards/pearl/matrix.c b/keyboards/pearl/matrix.c
deleted file mode 100644
index 57aa36b5ff..0000000000
--- a/keyboards/pearl/matrix.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
-Copyright 2017 Luiz Ribeiro <luizribeiro@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 <avr/io.h>
-#include <util/delay.h>
-
-#include "matrix.h"
-
-#ifndef DEBOUNCE
-#define DEBOUNCE	5
-#endif
-
-static uint8_t debouncing = DEBOUNCE;
-
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-void matrix_init(void) {
-    // all outputs for rows high
-    DDRB = 0xFF;
-    PORTB = 0xFF;
-    // all inputs for columns
-    DDRA = 0x00;
-    DDRC &= ~(0x111111<<2);
-    DDRD &= ~(1<<PIND7);
-    // all columns are pulled-up
-    PORTA = 0xFF;
-    PORTC |= (0b111111<<2);
-    PORTD |= (1<<PIND7);
-
-    // initialize matrix state: all keys off
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        matrix[row] = 0x00;
-        matrix_debouncing[row] = 0x00;
-    }
-}
-
-void matrix_set_row_status(uint8_t row) {
-    DDRB = (1 << row);
-    PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
-    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
-    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
-    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
-    return x;
-}
-
-uint8_t matrix_scan(void) {
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        matrix_set_row_status(row);
-        _delay_us(5);
-
-        matrix_row_t cols = (
-            // cols 0..7, PORTA 0 -> 7
-            (~PINA) & 0xFF
-        ) | (
-            // cols 8..13, PORTC 7 -> 0
-            bit_reverse((~PINC) & 0xFF) << 8
-        ) | (
-            // col 14, PORTD 7
-            ((~PIND) & (1 << PIND7)) << 7
-        );
-
-        if (matrix_debouncing[row] != cols) {
-            matrix_debouncing[row] = cols;
-            debouncing = DEBOUNCE;
-        }
-    }
-
-    if (debouncing) {
-        if (--debouncing) {
-            _delay_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-                matrix[i] = matrix_debouncing[i];
-            }
-        }
-    }
-
-    matrix_scan_user();
-
-    return 1;
-}
-
-inline matrix_row_t matrix_get_row(uint8_t row) {
-    return matrix[row];
-}
-
-void matrix_print(void) {
-}