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/*
Copyright 2018 Massdrop Inc.
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 "alt.h"
#include "d51_util.h"
#include "debug.h"
#include "clks.h"
#include <string.h>
#ifndef MATRIX_IO_DELAY
# define MATRIX_IO_DELAY 1
#endif
matrix_row_t mlatest[MATRIX_ROWS];
matrix_row_t mlast[MATRIX_ROWS];
matrix_row_t mdebounced[MATRIX_ROWS];
uint8_t row_ports[] = { MATRIX_ROW_PORTS };
uint8_t row_pins[] = { MATRIX_ROW_PINS };
uint8_t col_ports[] = { MATRIX_COL_PORTS };
uint8_t col_pins[] = { MATRIX_COL_PINS };
uint32_t row_masks[2]; //NOTE: If more than PA PB used in the future, adjust code to accomodate
__attribute__((weak)) void matrix_io_delay(void) { wait_us(MATRIX_IO_DELAY); }
__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) {
}
void matrix_init(void)
{
memset(mlatest, 0, MATRIX_ROWS * sizeof(matrix_row_t));
memset(mlast, 0, MATRIX_ROWS * sizeof(matrix_row_t));
memset(mdebounced, 0, MATRIX_ROWS * sizeof(matrix_row_t));
row_masks[PA] = 0;
row_masks[PB] = 0;
uint8_t row;
for (row = 0; row < MATRIX_ROWS; row++)
{
PORT->Group[row_ports[row]].DIRCLR.reg = 1 << row_pins[row]; //Input
PORT->Group[row_ports[row]].OUTCLR.reg = 1 << row_pins[row]; //Low
PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.INEN = 1; //Input Enable,
PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.PULLEN = 1; //Pull Enable
row_masks[row_ports[row]] |= 1 << row_pins[row]; //Add pin to proper row mask
}
uint8_t col;
for (col = 0; col < MATRIX_COLS; col++)
{
PORT->Group[col_ports[col]].DIRSET.reg = 1 << col_pins[col]; //Output
PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; //Low
}
matrix_init_quantum();
}
uint64_t mdebouncing = 0;
uint8_t matrix_scan(void)
{
uint8_t mchanged;
uint8_t row;
uint8_t col;
uint32_t scans[2]; //PA PB
if (timer_read64() < mdebouncing) return 1; //mdebouncing == 0 when no debouncing active
memset(mlatest, 0, MATRIX_ROWS * sizeof(matrix_row_t)); //Zero the result buffer
for (col = 0; col < MATRIX_COLS; col++)
{
PORT->Group[col_ports[col]].OUTSET.reg = 1 << col_pins[col]; //Set col output
matrix_io_delay(); //Delay for output
scans[PA] = PORT->Group[PA].IN.reg & row_masks[PA]; //Read PA row pins data
scans[PB] = PORT->Group[PB].IN.reg & row_masks[PB]; //Read PB row pins data
PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; //Clear col output
for (row = 0; row < MATRIX_ROWS; row++)
{
//Move scan bits from scans array into proper row bit locations
if (scans[row_ports[row]] & (1 << row_pins[row]))
mlatest[row] |= 1 << col;
}
}
mchanged = 0; //Default to no matrix change since last
for (row = 0; row < MATRIX_ROWS; row++)
{
if (mlast[row] != mlatest[row])
mchanged = 1;
mlast[row] = mlatest[row];
}
if (!mchanged)
{
for (row = 0; row < MATRIX_ROWS; row++)
mdebounced[row] = mlatest[row];
mdebouncing = 0;
}
else
{
//Begin or extend debounce on change
mdebouncing = timer_read64() + DEBOUNCE;
}
matrix_scan_quantum();
return 1;
}
matrix_row_t matrix_get_row(uint8_t row)
{
return mdebounced[row];
}
void matrix_print(void)
{
char buf[(MATRIX_COLS+8)*(MATRIX_ROWS+1)] = "R C";
char *pbuf = buf+3;
uint32_t cols;
uint32_t rows;
matrix_row_t row;
for (cols = 1; cols <= MATRIX_COLS; cols++)
{
*pbuf = (cols%10)+48;
pbuf++;
}
*pbuf = '\r'; pbuf++;
*pbuf = '\n'; pbuf++;
for (rows = 1; rows <= MATRIX_ROWS; rows++)
{
row = matrix_get_row(rows-1);
if (rows < 10) { *pbuf = rows+48; pbuf++; *pbuf = ' '; pbuf++; *pbuf = ' '; pbuf++; }
else { *pbuf = (rows/10)+48; pbuf++; *pbuf = (rows%10)+48; pbuf++; *pbuf = ' '; pbuf++; }
for (cols = 0; cols < MATRIX_COLS; cols++)
{
if (row & 1 << cols) *pbuf = 'X';
else *pbuf = '.';
pbuf++;
}
*pbuf = '\r'; pbuf++;
*pbuf = '\n'; pbuf++;
}
*pbuf = 0;
dprint(buf);
}
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