qmk_firmware/keyboards/massdrop/alt/matrix.c
patrickmt 6e984a8b5e Update to arm_atsam wait and timer routines
Microsecond (us) delays are now handled by a busy wait loop according to MCU frequency. This replaces the system counter method which had an overhead of around 12us.
TC5 device and supporting routines removed as it was the old us delay counter.
wait_ms is now properly a macro to CLK_delay_ms.
wait_us is now properly a macro to CLK_delay_us.
Removed CLK_get_us as it has no use.
All calls to CLK_get_ms() have been replaced by timer_read64() with corrected typing.
All calls to CLK_delay_ms() have been replaced by wait_ms().
All calls to CLK_delay_us() have been replaced by wait_us() and timings verified or updated as needed after review on scope.
Corrected typing of variables using 64bit ms timer readings if needed.
2019-01-07 12:44:55 -08:00

176 lines
4.8 KiB
C

/*
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>
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_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
wait_us(1); //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() + DEBOUNCING_DELAY;
}
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);
}