1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* Copyright 2019
*
* 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 <avr/io.h>
#include <string.h>
#include "matrix.h"
#include "pca9555.h"
#include "quantum.h"
#include "debug.h"
// PCA9555 slave addresses
#define IC1 0x20
#define IC2 0x21
//_____Utility funcs___________________________________________________________
static void init_pins(void) {
// init all rows - IC1 port0 input
pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state
// init all cols high - IC2 all input
pca9555_set_config(IC1, PCA9555_PORT1, ALL_INPUT); // same as initial state
pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state
pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state
pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW);
}
static void select_row(uint8_t row) {
// For the Southpaw Ext 65% pins 1-6 are used for the rows
uint8_t pin = row;
uint8_t mask = 2 << pin;
pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
}
static uint32_t read_cols(void) {
//Read column inputs. Pins 13-31 are used. Split across both ICs but they are sequential
uint32_t state_1 = pca9555_readPins(IC1, PCA9555_PORT1);
uint32_t state_2 = pca9555_readPins(IC2, PCA9555_PORT0);
uint32_t state_3 = pca9555_readPins(IC2, PCA9555_PORT1);
uint32_t state = (((state_3 & 0b01111111) << 12) | (state_2 << 4) | ((state_1 & 0b11110000) >> 4));
return ~state;
}
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;
// Select row and wait for row selection to stabilize
select_row(current_row);
// Skip the wait_us(30); as i2c is slow enough to debounce the io changes
current_matrix[current_row] = read_cols();
// No need to Unselect row as the next `select_row` will blank everything
return (last_row_value != current_matrix[current_row]);
}
//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________
void matrix_init_custom(void) {
pca9555_init(IC1);
pca9555_init(IC2);
init_pins();
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
changed |= read_cols_on_row(current_matrix, current_row);
}
return changed;
}
|
