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qmk_firmware/keyboards/dc01/left/matrix.c

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/*
Copyright 2012 Jun Wako
Copyright 2014 Jack Humbert
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 <stdint.h>
#include <stdbool.h>
#if defined(__AVR__)
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#endif
#include "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "timer.h"
#include "i2c_master.h"
#define SLAVE_I2C_ADDRESS_RIGHT 0x19
#define SLAVE_I2C_ADDRESS_NUMPAD 0x21
#define SLAVE_I2C_ADDRESS_ARROW 0x23
#define ERROR_DISCONNECT_COUNT 5
static uint8_t error_count_right = 0;
static uint8_t error_count_numpad = 0;
static uint8_t error_count_arrow = 0;
/* Set 0 if debouncing isn't needed */
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
#if (DEBOUNCE > 0)
static uint16_t debouncing_time;
static bool debouncing = false;
#endif
#if (MATRIX_COLS <= 8)
# define print_matrix_header() print("\nr/c 01234567\n")
# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
# define matrix_bitpop(i) bitpop(matrix[i])
# define ROW_SHIFTER ((uint8_t)1)
#elif (MATRIX_COLS <= 16)
# define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
# define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
# define matrix_bitpop(i) bitpop16(matrix[i])
# define ROW_SHIFTER ((uint16_t)1)
#elif (MATRIX_COLS <= 32)
# define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
# define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
# define matrix_bitpop(i) bitpop32(matrix[i])
# define ROW_SHIFTER ((uint32_t)1)
#endif
#ifdef MATRIX_MASKED
extern const matrix_row_t matrix_mask[];
#endif
#if (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const uint8_t col_pins[MATRIX_COLS_SCANNED] = MATRIX_COL_PINS;
#endif
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
#if (DIODE_DIRECTION == COL2ROW)
static void init_cols(void);
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
static void unselect_rows(void);
static void select_row(uint8_t row);
static void unselect_row(uint8_t row);
#elif (DIODE_DIRECTION == ROW2COL)
static void init_rows(void);
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
static void unselect_cols(void);
static void unselect_col(uint8_t col);
static void select_col(uint8_t col);
#endif
__attribute__ ((weak))
void matrix_init_quantum(void) {
matrix_init_kb();
}
__attribute__ ((weak))
void matrix_scan_quantum(void) {
matrix_scan_kb();
}
__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) {
}
inline
uint8_t matrix_rows(void) {
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void) {
return MATRIX_COLS;
}
i2c_status_t i2c_transaction(uint8_t address, uint32_t mask, uint8_t col_offset);
//this replases tmk code
void matrix_setup(void){
i2c_init();
}
void matrix_init(void) {
// initialize row and col
#if (DIODE_DIRECTION == COL2ROW)
unselect_rows();
init_cols();
#elif (DIODE_DIRECTION == ROW2COL)
unselect_cols();
init_rows();
#endif
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
matrix_debouncing[i] = 0;
}
matrix_init_quantum();
}
uint8_t matrix_scan(void)
{
#if (DIODE_DIRECTION == COL2ROW)
// Set row, read cols
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
# if (DEBOUNCE > 0)
bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
if (matrix_changed) {
debouncing = true;
debouncing_time = timer_read();
}
# else
read_cols_on_row(matrix, current_row);
# endif
}
#elif (DIODE_DIRECTION == ROW2COL)
// Set col, read rows
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
# if (DEBOUNCE > 0)
bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
if (matrix_changed) {
debouncing = true;
debouncing_time = timer_read();
}
# else
read_rows_on_col(matrix, current_col);
# endif
}
#endif
# if (DEBOUNCE > 0)
if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = matrix_debouncing[i];
}
debouncing = false;
}
# endif
if (i2c_transaction(SLAVE_I2C_ADDRESS_RIGHT, 0x3F, 0)){ //error has occured for main right half
error_count_right++;
if (error_count_right > ERROR_DISCONNECT_COUNT){ //disconnect half
for (uint8_t i = 0; i < MATRIX_ROWS ; i++) {
matrix[i] &= 0x3F; //mask bits to keep
}
}
}else{ //no error
error_count_right = 0;
}
if (i2c_transaction(SLAVE_I2C_ADDRESS_ARROW, 0X3FFF, 8)){ //error has occured for arrow cluster
error_count_arrow++;
if (error_count_arrow > ERROR_DISCONNECT_COUNT){ //disconnect arrow cluster
for (uint8_t i = 0; i < MATRIX_ROWS ; i++) {
matrix[i] &= 0x3FFF; //mask bits to keep
}
}
}else{ //no error
error_count_arrow = 0;
}
if (i2c_transaction(SLAVE_I2C_ADDRESS_NUMPAD, 0x1FFFF, 11)){ //error has occured for numpad
error_count_numpad++;
if (error_count_numpad > ERROR_DISCONNECT_COUNT){ //disconnect numpad
for (uint8_t i = 0; i < MATRIX_ROWS ; i++) {
matrix[i] &= 0x1FFFF; //mask bits to keep
}
}
}else{ //no error
error_count_numpad = 0;
}
matrix_scan_quantum();
return 1;
}
bool matrix_is_modified(void)
{
#if (DEBOUNCE > 0)
if (debouncing) return false;
#endif
return true;
}
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)
{
// Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
// switch blocker installed and the switch is always pressed.
#ifdef MATRIX_MASKED
return matrix[row] & matrix_mask[row];
#else
return matrix[row];
#endif
}
void matrix_print(void)
{
print_matrix_header();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
phex(row); print(": ");
print_matrix_row(row);
print("\n");
}
}
uint8_t matrix_key_count(void)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
count += matrix_bitpop(i);
}
return count;
}
#if (DIODE_DIRECTION == COL2ROW)
static void init_cols(void)
{
for(uint8_t x = 0; x < MATRIX_COLS_SCANNED; x++) {
uint8_t pin = col_pins[x];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
{
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[current_row];
// Clear data in matrix row
current_matrix[current_row] = 0;
// Select row and wait for row selecton to stabilize
select_row(current_row);
wait_us(30);
// For each col...
for(uint8_t col_index = 0; col_index < MATRIX_COLS_SCANNED; col_index++) {
// Select the col pin to read (active low)
uint8_t pin = col_pins[col_index];
uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
// Populate the matrix row with the state of the col pin
current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
}
// Unselect row
unselect_row(current_row);
return (last_row_value != current_matrix[current_row]);
}
static void select_row(uint8_t row)
{
uint8_t pin = row_pins[row];
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
static void unselect_row(uint8_t row)
{
uint8_t pin = row_pins[row];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
static void unselect_rows(void)
{
for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
uint8_t pin = row_pins[x];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
}
#elif (DIODE_DIRECTION == ROW2COL)
static void init_rows(void)
{
for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
uint8_t pin = row_pins[x];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
}
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
{
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
select_col(current_col);
wait_us(30);
// For each row...
for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
{
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[row_index];
// Check row pin state
if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
{
// Pin LO, set col bit
current_matrix[row_index] |= (ROW_SHIFTER << current_col);
}
else
{
// Pin HI, clear col bit
current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
{
matrix_changed = true;
}
}
// Unselect col
unselect_col(current_col);
return matrix_changed;
}
static void select_col(uint8_t col)
{
uint8_t pin = col_pins[col];
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
static void unselect_col(uint8_t col)
{
uint8_t pin = col_pins[col];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
static void unselect_cols(void)
{
for(uint8_t x = 0; x < MATRIX_COLS_SCANNED; x++) {
uint8_t pin = col_pins[x];
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
}
#endif
// Complete rows from other modules over i2c
i2c_status_t i2c_transaction(uint8_t address, uint32_t mask, uint8_t col_offset) {
i2c_status_t err = i2c_start((address << 1) | I2C_WRITE, 10);
i2c_write(0x01, 10); //request data in address 1
i2c_start((address << 1) | I2C_READ, 5);
err = i2c_read_ack(10);
if (err == 0x55) { //synchronization byte
for (uint8_t i = 0; i < MATRIX_ROWS-1 ; i++) { //assemble slave matrix in main matrix
matrix[i] &= mask; //mask bits to keep
err = i2c_read_ack(10);
matrix[i] |= ((uint32_t)err << (MATRIX_COLS_SCANNED + col_offset)); //add new bits at the end
}
//last read request must be followed by a NACK
matrix[MATRIX_ROWS - 1] &= mask; //mask bits to keep
err = i2c_read_nack(10);
matrix[MATRIX_ROWS - 1] |= ((uint32_t)err << (MATRIX_COLS_SCANNED + col_offset)); //add new bits at the end
} else {
i2c_stop();
return 1;
}
i2c_stop();
return 0;
}
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