93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/**
|
|
* 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_M20_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;
|
|
}
|