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/**
* matrix.c
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "quantum.h"
#include "matrix.h"
#include "tca6424.h"
#include "m20add.h"
static const uint16_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
void matrix_init_custom(void)
{
tca6424_init();
// set port0
tca6424_write_config(TCA6424_PORT0, 0);
// set port1
tca6424_write_config(TCA6424_PORT1, 0);
// set port2
tca6424_write_config(TCA6424_PORT2, 0xF5);
// clear output
tca6424_write_port(TCA6424_PORT0, 0);
tca6424_write_port(TCA6424_PORT1, 0);
tca6424_write_port(TCA6424_PORT2, 0);
}
static uint8_t row_mask[] = {ROW1_MASK,ROW2_MASK,ROW3_MASK,ROW4_MASK,ROW5_MASK,ROW6_MASK};
static uint8_t col_mask[] = {COL1_MASK, COL2_MASK, COL3_MASK, COL4_MASK, COL5_MASK, COL6_MASK, COL7_MASK, COL8_MASK, COL9_MASK, COL10_MASK, COL11_MASK, COL12_MASK, COL13_MASK, COL14_MASK, COL15_MASK, COL16_MASK};
bool matrix_scan_custom(matrix_row_t current_matrix[])
{
bool changed = false;
uint8_t p0_data = tca6424_read_port(TCA6424_PORT0);
for (int col = 0; col < MATRIX_COLS; col++) {
// Select col and wait for col selecton to stabilize
switch(col) {
case 0:
set_pin(col_pins[col]);
break;
case 1 ... 8:
tca6424_write_port(TCA6424_PORT1, col_mask[col]);
break;
default:
tca6424_write_port(TCA6424_PORT0, col_mask[col]|(p0_data&0x01));
break;
}
matrix_io_delay();
// read row port for all rows
uint8_t row_value = tca6424_read_port(ROW_PORT);
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
uint8_t tmp = row;
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[tmp];
// Check row pin state
if (row_value & row_mask[row]) {
// Pin HI, set col bit
current_matrix[tmp] |= (1 << col);
} else {
// Pin LOW, clear col bit
current_matrix[tmp] &= ~(1 << col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[tmp]) && !(changed)) {
changed = true;
}
}
// Unselect col
switch(col) {
case 0:
clear_pin(col_pins[col]);
break;
case 8:
tca6424_write_port(TCA6424_PORT1, 0);
break;
case 15:
tca6424_write_port(TCA6424_PORT0, p0_data&0x01);
break;
default:
break;
}
}
return changed;
}
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