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qmk_firmware/keyboards/gboards/gergo/matrix.c

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/*
Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
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 "matrix.h"
#include "wait.h"
#include "debug.h"
#include "util.h"
#include "debounce.h"
#include "gergo.h"
#ifdef BALLER
#include <avr/interrupt.h>
#include "pointing_device.h"
#endif
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
// MCP Pin Defs
#define RROW1 (1u<<3)
#define RROW2 (1u<<2)
#define RROW3 (1u<<1)
#define RROW4 (1u<<0)
#define COL0 (1u<<0)
#define COL1 (1u<<1)
#define COL2 (1u<<2)
#define COL3 (1u<<3)
#define COL4 (1u<<4)
#define COL5 (1u<<5)
#define COL6 (1u<<6)
// ATmega pin defs
#define ROW1 (1u<<6)
#define ROW2 (1u<<5)
#define ROW3 (1u<<4)
#define ROW4 (1u<<1)
#define COL7 (1u<<0)
#define COL8 (1u<<1)
#define COL9 (1u<<2)
#define COL10 (1u<<3)
#define COL11 (1u<<2)
#define COL12 (1u<<3)
#define COL13 (1u<<6)
//Trackball pin defs
#define TRKUP (1u<<4)
#define TRKDN (1u<<5)
#define TRKLT (1u<<6)
#define TRKRT (1u<<7)
#define TRKBTN (1u<<6)
// Multiple for mouse moves
#ifndef TRKSTEP
#define TRKSTEP 20
#endif
// multiple for mouse scroll
#ifndef SCROLLSTEP
#define SCROLLSTEP 5
#endif
// bit masks
#define BMASK (COL7 | COL8 | COL9 | COL10)
#define CMASK (COL13)
#define DMASK (COL11 | COL12)
#define FMASK (ROW1 | ROW2 | ROW3 | ROW4)
#define RROWMASK (RROW1 | RROW2 | RROW3 | RROW4)
#define MCPMASK (COL0 | COL1 | COL2 | COL3 | COL4 | COL5 | COL6)
#define TRKMASK (TRKUP | TRKDN | TRKRT | TRKLT)
// Trackball interrupts accumulate over here. Processed on scan
// Stores prev state of mouse, high bits store direction
uint8_t trkState = 0;
uint8_t trkBtnState = 0;
volatile uint8_t tbUpCnt = 0;
volatile uint8_t tbDnCnt = 0;
volatile uint8_t tbLtCnt = 0;
volatile uint8_t tbRtCnt = 0;
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
/*
* matrix state(1:on, 0:off)
* contains the raw values without debounce filtering of the last read cycle.
*/
static matrix_row_t raw_matrix[MATRIX_ROWS];
// Debouncing: store for each key the number of scans until it's eligible to
// change. When scanning the matrix, ignore any changes in keys that have
// already changed in the last DEBOUNCE scans.
static matrix_row_t read_cols(uint8_t row);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
static void enableInterrupts(void);
static uint8_t mcp23018_reset_loop;
// static uint16_t mcp23018_reset_loop;
__attribute__ ((weak)) void matrix_init_user(void) {}
__attribute__ ((weak)) void matrix_scan_user(void) {}
__attribute__ ((weak))
void matrix_init_kb(void) {
matrix_init_user();
}
__attribute__ ((weak))
void matrix_scan_kb(void) {
matrix_scan_user();
}
inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
void matrix_init(void) {
// initialize row and col
mcp23018_status = init_mcp23018();
unselect_rows();
init_cols();
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
raw_matrix[i] = 0;
}
debounce_init(MATRIX_ROWS);
matrix_init_kb();
}
void matrix_power_up(void) {
mcp23018_status = init_mcp23018();
unselect_rows();
init_cols();
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
}
}
// Reads and stores a row, returning
// whether a change occurred.
static inline bool store_raw_matrix_row(uint8_t index) {
matrix_row_t temp = read_cols(index);
if (raw_matrix[index] != temp) {
raw_matrix[index] = temp;
return true;
}
return false;
}
uint8_t matrix_scan(void) {
// TODO: Find what is trashing interrupts
enableInterrupts();
// First we handle the mouse inputs
#ifdef BALLER
uint8_t pBtn = PINE & TRKBTN;
#ifdef DEBUG_BALLER
// Compare to previous, mod report
if (tbUpCnt + tbDnCnt + tbLtCnt + tbRtCnt != 0)
xprintf("U: %d D: %d L: %d R: %d B: %d\n", tbUpCnt, tbDnCnt, tbLtCnt, tbRtCnt, (trkBtnState >> 6));
#endif
// Modify the report
report_mouse_t pRprt = pointing_device_get_report();
// Scroll by default, move on layer
if (layer_state == 0) {
pRprt.h += tbLtCnt * SCROLLSTEP; tbLtCnt = 0;
pRprt.h -= tbRtCnt * SCROLLSTEP; tbRtCnt = 0;
pRprt.v -= tbUpCnt * SCROLLSTEP; tbUpCnt = 0;
pRprt.v += tbDnCnt * SCROLLSTEP; tbDnCnt = 0;
} else {
pRprt.x -= tbLtCnt * TRKSTEP * (layer_state - 1); tbLtCnt = 0;
pRprt.x += tbRtCnt * TRKSTEP * (layer_state - 1); tbRtCnt = 0;
pRprt.y -= tbUpCnt * TRKSTEP * (layer_state - 1); tbUpCnt = 0;
pRprt.y += tbDnCnt * TRKSTEP * (layer_state - 1); tbDnCnt = 0;
}
#ifdef DEBUG_BALLER
if (pRprt.x != 0 || pRprt.y != 0)
xprintf("X: %d Y: %d\n", pRprt.x, pRprt.y);
#endif
if ((pBtn != trkBtnState) && ((pBtn >> 6) == 0)) pRprt.buttons |= MOUSE_BTN1;
if ((pBtn != trkBtnState) && ((pBtn >> 6) == 1)) pRprt.buttons &= ~MOUSE_BTN1;
// Save state, push update
if (pRprt.x != 0 || pRprt.y != 0 || pRprt.h != 0 || pRprt.v != 0 || (trkBtnState != pBtn))
pointing_device_set_report(pRprt);
trkBtnState = pBtn;
#endif
// Then the keyboard
if (mcp23018_status) { // if there was an error
if (++mcp23018_reset_loop == 0) {
// if (++mcp23018_reset_loop >= 1300) {
// since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
// this will be approx bit more frequent than once per second
print("trying to reset mcp23018\n");
mcp23018_status = init_mcp23018();
if (mcp23018_status) {
print("left side not responding\n");
} else {
print("left side attached\n");
}
}
}
bool changed = false;
for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
// select rows from left and right hands
uint8_t left_index = i;
uint8_t right_index = i + MATRIX_ROWS_PER_SIDE;
select_row(left_index);
select_row(right_index);
// we don't need a 30us delay anymore, because selecting a
// left-hand row requires more than 30us for i2c.
changed |= store_raw_matrix_row(left_index);
changed |= store_raw_matrix_row(right_index);
unselect_rows();
}
debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
matrix_scan_kb();
enableInterrupts();
#ifdef DEBUG_MATRIX
for (uint8_t c = 0; c < MATRIX_COLS; c++)
for (uint8_t r = 0; r < MATRIX_ROWS; r++)
if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
#endif
return 1;
}
inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
void matrix_print(void) {
print("\nr/c 0123456789ABCDEF\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
print_hex8(row); print(": ");
print_bin_reverse16(matrix_get_row(row));
print("\n");
}
}
// Remember this means ROWS
static void init_cols(void) {
// init on mcp23018
// not needed, already done as part of init_mcp23018()
// Input with pull-up(DDR:0, PORT:1)
DDRF &= ~FMASK;
PORTF |= FMASK;
}
static matrix_row_t read_cols(uint8_t row) {
if (row < 7) {
if (mcp23018_status) { // if there was an error
return 0;
} else {
uint8_t data = 0;
mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(GPIOB, I2C_TIMEOUT); if (mcp23018_status) goto out;
mcp23018_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT); if (mcp23018_status) goto out;
mcp23018_status = i2c_read_nack(I2C_TIMEOUT); if (mcp23018_status < 0) goto out;
data = ~((uint8_t)mcp23018_status);
mcp23018_status = I2C_STATUS_SUCCESS;
out:
i2c_stop();
#ifdef DEBUG_MATRIX
if (data != 0x00) xprintf("I2C: %d\n", data);
#endif
return data;
}
} else {
/* read from teensy
* bitmask is 0b0111001, but we want the lower four
* we'll return 1s for the top two, but that's harmless.
*/
// So I need to confuckulate all this
//return ~(((PIND & DMASK) >> 1 | ((PINC & CMASK) >> 6) | (PIN)));
//return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
return ~(
(((PINF & ROW4) >> 1)
| ((PINF & (ROW1 | ROW2 | ROW3)) >> 3))
& 0xF);
}
}
// Row pin configuration
static void unselect_rows(void)
{
// no need to unselect on mcp23018, because the select step sets all
// the other row bits high, and it's not changing to a different
// direction
// Hi-Z(DDR:0, PORT:0) to unselect
DDRB &= ~(BMASK | TRKMASK);
PORTB &= ~(BMASK);
DDRC &= ~CMASK;
PORTC &= ~CMASK;
DDRD &= ~DMASK;
PORTD &= ~DMASK;
// Fix trashing of DDRB for TB
PORTB |= TRKMASK;
}
static void select_row(uint8_t row)
{
if (row < 7) {
// select on mcp23018
if (mcp23018_status) { // do nothing on error
} else { // set active row low : 0 // set other rows hi-Z : 1
mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(GPIOA, I2C_TIMEOUT); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0xFF & ~(1<<row), I2C_TIMEOUT); if (mcp23018_status) goto out;
out:
i2c_stop();
}
} else {
// Output low(DDR:1, PORT:0) to select
switch (row) {
case 7:
DDRB |= COL7;
PORTB &= ~COL7;
break;
case 8:
DDRB |= COL8;
PORTB &= ~COL8;
break;
case 9:
DDRB |= COL9;
PORTB &= ~COL9;
break;
case 10:
DDRB |= COL10;
PORTB &= ~COL10;
break;
case 11:
DDRD |= COL11;
PORTD &= ~COL11;
break;
case 12:
DDRD |= COL12;
PORTD &= ~COL12;
break;
case 13:
DDRC |= COL13;
PORTC &= ~COL13;
break;
}
}
}
// Trackball Interrupts
static void enableInterrupts(void) {
#ifdef BALLER
// Set interrupt mask
// Set port defs
DDRB &= ~TRKMASK;
PORTB |= TRKMASK;
DDRE &= ~TRKBTN;
PORTE |= TRKBTN;
// Interrupt shenanigans
//EIMSK |= (1 << PCIE0);
PCMSK0 |= TRKMASK;
PCICR |= (1 << PCIE0);
sei();
#endif
return;
}
#ifdef BALLER
ISR (PCINT0_vect) {
// Don't get fancy, we're in a interrupt here
// PCINT reports a interrupt for a change on the bus
// We hand the button at scantime for debounce
volatile uint8_t pState = PINB & TRKMASK;
if ((pState & TRKUP) != (trkState & TRKUP)) tbUpCnt++;
if ((pState & TRKDN) != (trkState & TRKDN)) tbDnCnt++;
if ((pState & TRKLT) != (trkState & TRKLT)) tbLtCnt++;
if ((pState & TRKRT) != (trkState & TRKRT)) tbRtCnt++;
trkState = pState;
}
#endif
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