diff --git a/keyboards/handwired/dactyl/config.h b/keyboards/handwired/dactyl/config.h
index 8129b0a67..a990cc720 100644
--- a/keyboards/handwired/dactyl/config.h
+++ b/keyboards/handwired/dactyl/config.h
@@ -30,12 +30,15 @@ along with this program. If not, see .
#define PRODUCT Dactyl
#define DESCRIPTION An ortholinear, split, 3D-curved keyboard with thumb clusters.
-/* key matrix size
- * At this time, "row" in the dactyl's code actually means "column" on the
- * physical keyboard. It's confusing. I'm sorry. Blame Jack Humbert :P
- */
-#define MATRIX_ROWS 12
-#define MATRIX_COLS 6
+#define DIODE_DIRECTION ROW2COL
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 12
+#define COL_EXPANDED { true, true, true, true, true, true, false, false, false, false, false, false}
+#define MATRIX_ONBOARD_ROW_PINS { F0, F1, F4, F5, F6, F7 }
+#define MATRIX_ONBOARD_COL_PINS { 0, 0, 0, 0, 0, 0, B1, B2, B3, D2, D3, C6 }
+#define EXPANDER_COL_REGISTER 0
+#define MATRIX_EXPANDER_COL_PINS {0, 1, 2, 3, 4, 5}
+#define MATRIX_EXPANDER_ROW_PINS {0, 1, 2, 3, 4, 5}
#define MOUSEKEY_INTERVAL 20
#define MOUSEKEY_DELAY 0
diff --git a/keyboards/handwired/dactyl/dactyl.c b/keyboards/handwired/dactyl/dactyl.c
index abe3d9d60..81b9dce0f 100644
--- a/keyboards/handwired/dactyl/dactyl.c
+++ b/keyboards/handwired/dactyl/dactyl.c
@@ -1,80 +1,15 @@
#include "dactyl.h"
#include "i2cmaster.h"
-
-bool i2c_initialized = 0;
-uint8_t mcp23018_status = 0x20;
-
-void matrix_init_kb(void) {
- DDRB &= ~(1<<4); // set B(4) as input
- PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
-
- // unused pins - C7, D4, D5, D7, E6
- // set as input with internal pull-up enabled
- DDRC &= ~(1<<7);
- DDRD &= ~(1<<5 | 1<<4);
- DDRE &= ~(1<<6);
- PORTC |= (1<<7);
- PORTD |= (1<<5 | 1<<4);
- PORTE |= (1<<6);
-
- matrix_init_user();
-}
-
-uint8_t init_mcp23018(void) {
- mcp23018_status = 0x20;
-
- // I2C subsystem
-
- if (i2c_initialized == 0) {
- i2c_init(); // on pins D(1,0)
- i2c_initialized = true;
- _delay_ms(1000);
- }
-
- // set pin direction
- // - unused : input : 1
- // - input : input : 1
- // - driving : output : 0
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(IODIRA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
- i2c_stop();
-
- // set pull-up
- // - unused : on : 1
- // - input : on : 1
- // - driving : off : 0
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPPUA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
-
-out:
- i2c_stop();
-
- return mcp23018_status;
-}
-
#ifdef SWAP_HANDS_ENABLE
__attribute__ ((weak))
// swap-hands action needs a matrix to define the swap
const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
- /* Left hand, matrix positions */
- {{0,11}, {1,11}, {2,11}, {3,11}, {4,11}, {5,11}},
- {{0,10}, {1,10}, {2,10}, {3,10}, {4,10}, {5,10}},
- {{0,9}, {1,9}, {2,9}, {3,9}, {4,9}, {5,9}},
- {{0,8}, {1,8}, {2,8}, {3,8}, {4,8}, {5,8}},
- {{0,7}, {1,7}, {2,7}, {3,7}, {4,7}, {5,7}},
- {{0,6}, {1,6}, {2,6}, {3,6}, {4,6}, {5,6}},
-
- /* Right hand, matrix positions */
- {{0,5}, {1,5}, {2,5}, {3,5}, {4,5}, {5,5}},
- {{0,4}, {1,4}, {2,4}, {3,4}, {4,4}, {5,4}},
- {{0,3}, {1,3}, {2,3}, {3,3}, {4,3}, {5,3}},
- {{0,2}, {1,2}, {2,2}, {3,2}, {4,2}, {5,2}},
- {{0,1}, {1,1}, {2,1}, {3,1}, {4,1}, {5,1}},
- {{0,0}, {1,0}, {2,0}, {3,0}, {4,0}, {5,0}},
+ {{0,11}, {0,10}, {0,9}, {0,8}, {0,7}, {0,6}, {0,5}, {0,4}, {0,3}, {0,2}, {0,1}, {0,0}},
+ {{1,11}, {1,11}, {1,9}, {1,8}, {1,7}, {1,6}, {1,5}, {1,4}, {1,3}, {1,2}, {1,1}, {1,0}},
+ {{2,11}, {2,12}, {2,9}, {2,8}, {2,7}, {2,6}, {2,5}, {2,4}, {2,3}, {2,2}, {2,1}, {2,0}},
+ {{3,11}, {3,13}, {3,9}, {3,8}, {3,7}, {3,6}, {3,5}, {3,4}, {3,3}, {3,2}, {3,1}, {3,0}},
+ {{4,11}, {4,14}, {4,9}, {4,8}, {4,7}, {4,6}, {4,5}, {4,4}, {4,3}, {4,2}, {4,1}, {4,0}},
+ {{5,11}, {5,15}, {5,9}, {5,8}, {5,7}, {5,6}, {5,5}, {5,4}, {5,3}, {5,2}, {5,1}, {5,0}},
};
#endif
diff --git a/keyboards/handwired/dactyl/dactyl.h b/keyboards/handwired/dactyl/dactyl.h
index aa573ebd2..3e33930e3 100644
--- a/keyboards/handwired/dactyl/dactyl.h
+++ b/keyboards/handwired/dactyl/dactyl.h
@@ -10,7 +10,6 @@
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
#define CPU_16MHz 0x00
-// I2C aliases and register addresses (see "mcp23018.md")
#define I2C_ADDR 0b0100000
#define I2C_ADDR_WRITE ( (I2C_ADDR<<1) | I2C_WRITE )
#define I2C_ADDR_READ ( (I2C_ADDR<<1) | I2C_READ )
@@ -23,52 +22,46 @@
#define OLATA 0x14 // output latch register
#define OLATB 0x15
-extern uint8_t mcp23018_status;
+extern uint8_t expander_status;
+extern uint8_t expander_input_pin_mask;
+extern bool i2c_initialized;
void init_dactyl(void);
-uint8_t init_mcp23018(void);
+void init_expander(void);
-#define KEYMAP( \
- \
- /* left hand, spatial positions */ \
- k00,k01,k02,k03,k04,k05, \
- k10,k11,k12,k13,k14,k15, \
- k20,k21,k22,k23,k24,k25, \
- k30,k31,k32,k33,k34,k35, \
- k40,k41,k42,k43,k44, \
- k55,k50, \
- k54, \
- k53,k52,k51, \
- \
- /* right hand, spatial positions */ \
- k06,k07,k08,k09,k0A,k0B, \
- k16,k17,k18,k19,k1A,k1B, \
- k26,k27,k28,k29,k2A,k2B, \
- k36,k37,k38,k39,k3A,k3B, \
- k47,k48,k49,k4A,k4B, \
- k5B,k56, \
- k57, \
- k5A,k59,k58 ) \
- \
- /* matrix positions */ \
- { \
- { k00, k10, k20, k30, k40, k50 }, \
- { k01, k11, k21, k31, k41, k51 }, \
- { k02, k12, k22, k32, k42, k52 }, \
- { k03, k13, k23, k33, k43, k53 }, \
- { k04, k14, k24, k34, k44, k54 }, \
- { k05, k15, k25, k35, KC_NO, k55 }, \
- \
- { k06, k16, k26, k36, KC_NO, k56 }, \
- { k07, k17, k27, k37, k47, k57 }, \
- { k08, k18, k28, k38, k48, k58 }, \
- { k09, k19, k29, k39, k49, k59 }, \
- { k0A, k1A, k2A, k3A, k4A, k5A }, \
- { k0B, k1B, k2B, k3B, k4B, k5B } \
+#define KEYMAP( \
+ \
+ /* left hand, spatial positions */ \
+ k00,k01,k02,k03,k04,k05, \
+ k10,k11,k12,k13,k14,k15, \
+ k20,k21,k22,k23,k24,k25, \
+ k30,k31,k32,k33,k34,k35, \
+ k40,k41,k42,k43,k44, \
+ k55,k50, \
+ k54, \
+ k53,k52,k51, \
+ \
+ /* right hand, spatial positions */ \
+ k06,k07,k08,k09,k0A,k0B, \
+ k16,k17,k18,k19,k1A,k1B, \
+ k26,k27,k28,k29,k2A,k2B, \
+ k36,k37,k38,k39,k3A,k3B, \
+ k47,k48,k49,k4A,k4B, \
+ k5B,k56, \
+ k57, \
+ k5A,k59,k58 ) \
+ \
+ /* matrix positions */ \
+ { \
+ { k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0A, k0B }, \
+ { k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1A, k1B }, \
+ { k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2A, k2B }, \
+ { k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3A, k3B }, \
+ { k40, k41, k42, k43, k44, KC_NO, KC_NO, k47, k48, k49, k4A, k4B }, \
+ { k50, k51, k52, k53, k54, k55, k56, k57, k58, k59, k5A, k5B }, \
}
-
#define LAYOUT_dactyl KEYMAP
#endif
diff --git a/keyboards/handwired/dactyl/matrix.c b/keyboards/handwired/dactyl/matrix.c
index 0626f93d7..52c76fadd 100644
--- a/keyboards/handwired/dactyl/matrix.c
+++ b/keyboards/handwired/dactyl/matrix.c
@@ -1,5 +1,4 @@
/*
-
Copyright 2013 Oleg Kostyuk
Copyright 2017 Erin Call
@@ -16,10 +15,6 @@ 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 .
*/
-
-/*
- * scan matrix
- */
#include
#include
#include
@@ -31,47 +26,66 @@ along with this program. If not, see .
#include "matrix.h"
#include "dactyl.h"
#include "i2cmaster.h"
-#ifdef DEBUG_MATRIX_SCAN_RATE
-#include "timer.h"
+#include "timer.h"
+
+
+/* Set 0 if debouncing isn't needed */
+
+#ifndef DEBOUNCING_DELAY
+# define DEBOUNCING_DELAY 5
#endif
-/*
- * This constant define not debouncing time in msecs, but amount of matrix
- * scan loops which should be made to get stable debounced results.
- *
- * On the Dactyl, the matrix scan rate is relatively low, because
- * communicating with the left hand's I/O expander is slower than simply
- * selecting local pins.
- * Now it's only 317 scans/second, or about 3.15 msec/scan.
- * According to Cherry specs, debouncing time is 5 msec.
- *
- * And so, there is no sense to have DEBOUNCE higher than 2.
- */
+#if (DEBOUNCING_DELAY > 0)
+ static uint16_t debouncing_time;
+ static bool debouncing = false;
+#endif
-#ifndef DEBOUNCE
-# define DEBOUNCE 5
+#ifdef MATRIX_MASKED
+ extern const matrix_row_t matrix_mask[];
+#endif
+
+#if (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
+static const uint8_t onboard_row_pins[MATRIX_ROWS] = MATRIX_ONBOARD_ROW_PINS;
+static const uint8_t onboard_col_pins[MATRIX_COLS] = MATRIX_ONBOARD_COL_PINS;
+static const bool col_expanded[MATRIX_COLS] = COL_EXPANDED;
+static const uint8_t expander_row_pins[MATRIX_ROWS] = MATRIX_EXPANDER_ROW_PINS;
+static const uint8_t expander_col_pins[MATRIX_COLS] = MATRIX_EXPANDER_COL_PINS;
#endif
/* matrix state(1:on, 0:off) */
static matrix_row_t 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 uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-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);
+#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 select_col(uint8_t col);
+ static void unselect_col(uint8_t col);
+#endif
-static uint8_t mcp23018_reset_loop;
+static uint8_t expander_reset_loop;
+uint8_t expander_status;
+uint8_t expander_input_pin_mask;
+bool i2c_initialized = false;
#ifdef DEBUG_MATRIX_SCAN_RATE
uint32_t matrix_timer;
uint32_t matrix_scan_count;
#endif
+#define ROW_SHIFTER ((matrix_row_t)1)
+#if (DIODE_DIRECTION == COL2ROW)
+// bitmask to ensure the row state from the expander only applies to its columns
+#define EXPANDER_MASK ((matrix_row_t)0b00111111)
+#endif
__attribute__ ((weak))
void matrix_init_user(void) {}
@@ -103,20 +117,20 @@ uint8_t matrix_cols(void)
void matrix_init(void)
{
- // initialize row and col
-
- mcp23018_status = init_mcp23018();
-
+ init_expander();
+#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;
- for (uint8_t j=0; j < MATRIX_COLS; ++j) {
- debounce_matrix[i * MATRIX_COLS + j] = 0;
- }
+ matrix_debouncing[i] = 0;
}
#ifdef DEBUG_MATRIX_SCAN_RATE
@@ -125,59 +139,100 @@ void matrix_init(void)
#endif
matrix_init_quantum();
-
}
-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;
+void init_expander(void) {
+ if (! i2c_initialized) {
+ i2c_init();
+ wait_us(1000000);
}
-#ifdef DEBUG_MATRIX_SCAN_RATE
- matrix_timer = timer_read32();
- matrix_scan_count = 0;
+ if (! expander_input_pin_mask) {
+#if (DIODE_DIRECTION == COL2ROW)
+ for (int col = 0; col < MATRIX_COLS; col++) {
+ if (col_expanded[col]) {
+ expander_input_pin_mask |= (1 << expander_col_pins[col]);
+ }
+ }
+#elif (DIODE_DIRECTION == ROW2COL)
+ for (int row = 0; row < MATRIX_ROWS; row++) {
+ expander_input_pin_mask |= (1 << expander_row_pins[row]);
+ }
#endif
-}
-
-// Returns a matrix_row_t whose bits are set if the corresponding key should be
-// eligible to change in this scan.
-matrix_row_t debounce_mask(uint8_t row) {
- matrix_row_t result = 0;
- for (uint8_t j=0; j < MATRIX_COLS; ++j) {
- if (debounce_matrix[row * MATRIX_COLS + j]) {
- --debounce_matrix[row * MATRIX_COLS + j];
- } else {
- result |= (1 << j);
}
- }
- return result;
-}
-// Report changed keys in the given row. Resets the debounce countdowns
-// corresponding to each set bit in 'change' to DEBOUNCE.
-void debounce_report(matrix_row_t change, uint8_t row) {
- for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
- if (change & (1 << i)) {
- debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
- }
- }
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
+ expander_status = i2c_write(IODIRA); if (expander_status) goto out;
+
+ /*
+ Pin direction and pull-up depends on both the diode direction
+ and on whether the column register is 0 ("A") or 1 ("B"):
+ +-------+---------------+---------------+
+ | | ROW2COL | COL2ROW |
+ +-------+---------------+---------------+
+ | Reg 0 | input, output | output, input |
+ +-------+---------------+---------------+
+ | Reg 1 | output, input | input, output |
+ +-------+---------------+---------------+
+ */
+
+#if (EXPANDER_COLUMN_REGISTER == 0)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+ expander_status = i2c_write(0); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(0); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+# endif
+#elif (EXPANDER_COLUMN_REGISTER == 1)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(0); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+ expander_status = i2c_write(0); if (expander_status) goto out;
+# endif
+#endif
+
+ i2c_stop();
+
+ // set pull-up
+ // - unused : off : 0
+ // - input : on : 1
+ // - driving : off : 0
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
+ expander_status = i2c_write(GPPUA); if (expander_status) goto out;
+#if (EXPANDER_COLUMN_REGISTER == 0)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+ expander_status = i2c_write(0); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(0); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+# endif
+#elif (EXPANDER_COLUMN_REGISTER == 1)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(0); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
+ expander_status = i2c_write(0); if (expander_status) goto out;
+# endif
+#endif
+
+out:
+ i2c_stop();
}
uint8_t matrix_scan(void)
{
- if (mcp23018_status) { // if there was an error
- if (++mcp23018_reset_loop == 0) {
- // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
+ if (expander_status) { // if there was an error
+ if (++expander_reset_loop == 0) {
+ // since expander_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("trying to reset expander\n");
+ init_expander();
+ if (expander_status) {
print("left side not responding\n");
} else {
print("left side attached\n");
@@ -199,37 +254,71 @@ uint8_t matrix_scan(void)
}
#endif
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- select_row(i);
- wait_us(30); // without this wait read unstable value.
- matrix_row_t mask = debounce_mask(i);
- matrix_row_t cols = (read_cols(i) & mask) | (matrix[i] & ~mask);
- debounce_report(cols ^ matrix[i], i);
- matrix[i] = cols;
+#if (DIODE_DIRECTION == COL2ROW)
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+# if (DEBOUNCING_DELAY > 0)
+ bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
- unselect_rows();
+ if (matrix_changed) {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+# else
+ read_cols_on_row(matrix, current_row);
+# endif
}
- matrix_scan_quantum();
+#elif (DIODE_DIRECTION == ROW2COL)
+ for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+# if (DEBOUNCING_DELAY > 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 (DEBOUNCING_DELAY > 0)
+ if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ debouncing = false;
+ }
+# endif
+
+ matrix_scan_quantum();
return 1;
}
bool matrix_is_modified(void) // deprecated and evidently not called.
{
+#if (DEBOUNCING_DELAY > 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<> 4) + 1) &= ~_BV(pin & 0xF); // IN
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
- } else {
- // read from teensy
- return
- (PINF&(1<<0) ? 0 : (1<<0)) |
- (PINF&(1<<1) ? 0 : (1<<1)) |
- (PINF&(1<<4) ? 0 : (1<<2)) |
- (PINF&(1<<5) ? 0 : (1<<3)) |
- (PINF&(1<<6) ? 0 : (1<<4)) |
- (PINF&(1<<7) ? 0 : (1<<5)) ;
}
}
-/* Row pin configuration
- *
- * Teensy
- * row: 6 7 8 9 10 11
- * pin: B1 B2 B3 D2 D3 C6
- *
- * MCP23018
- * row: 0 1 2 3 4 5
- * pin: A0 A1 A2 A3 A4 A5
- */
-static void unselect_rows(void)
-{
- // unselect on mcp23018
- if (mcp23018_status) { // if there was an error
- // do nothing
- } else {
- // set all rows hi-Z : 1
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0xFF); if (mcp23018_status) goto out;
+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 selection to stabilize
+ select_row(current_row);
+ wait_us(30);
+
+ // Read columns from expander, unless it's in an error state
+ if (! expander_status) {
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
+ expander_status = i2c_write(GPIOA); if (expander_status) goto out;
+ expander_status = i2c_start(I2C_ADDR_READ); if (expander_status) goto out;
+
+ current_matrix[current_row] |= (~i2c_readNak()) & EXPANDER_MASK;
+
+ out:
+ i2c_stop();
+ }
+
+ // Read columns from onboard pins
+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+ if (! col_expanded[col_index]) {
+ uint8_t pin = onboard_col_pins[col_index];
+ uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+ current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
+ }
+ }
+
+ unselect_row(current_row);
+
+ return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row) {
+ // select on expander, unless it's in an error state
+ if (! expander_status) {
+ // set active row low : 0
+ // set other rows hi-Z : 1
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
+ expander_status = i2c_write(GPIOB); if (expander_status) goto out;
+ expander_status = i2c_write(0xFF & ~(1<> 4) + 1) |= _BV(pin & 0xF); // OUT
+ _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
-/* Row pin configuration
- *
- * Teensy
- * row: 6 7 8 9 10 11
- * pin: B1 B2 B3 D2 D3 C6
- *
- * MCP23018
- * row: 0 1 2 3 4 5
- * pin: A0 A1 A2 A3 A4 A5
- */
-static void select_row(uint8_t row)
+static void unselect_row(uint8_t row)
{
- if (row < 6) {
- // select on mcp23018
- if (mcp23018_status) { // if there was an error
+ // No need to explicitly unselect expander pins--their I/O state is
+ // set simultaneously, with a single bitmask sent to i2c_write. When
+ // select_row selects a single pin, it implicitly unselects all the
+ // other ones.
+
+ // unselect on teensy
+ uint8_t pin = onboard_row_pins[row];
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // OUT
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // LOW
+}
+
+static void unselect_rows(void) {
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ unselect_row(x);
+ }
+}
+
+#elif (DIODE_DIRECTION == ROW2COL)
+
+static void init_rows(void)
+{
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ uint8_t pin = onboard_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;
+
+ uint8_t column_state = 0;
+
+ //select col and wait for selection to stabilize
+ select_col(current_col);
+ wait_us(30);
+
+ if (current_col < 6) {
+ // read rows from expander
+ if (expander_status) {
+ // it's already in an error state; nothing we can do
+ return false;
+ }
+
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
+ expander_status = i2c_write(GPIOB); if (expander_status) goto out;
+ expander_status = i2c_start(I2C_ADDR_READ); if (expander_status) goto out;
+ column_state = i2c_readNak();
+
+ out:
+ i2c_stop();
+
+ column_state = ~column_state;
+ } else {
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+ if ((_SFR_IO8(onboard_row_pins[current_row] >> 4) & _BV(onboard_row_pins[current_row] & 0xF)) == 0) {
+ column_state |= (1 << current_row);
+ }
+ }
+ }
+
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[current_row];
+
+ if (column_state & (1 << current_row)) {
+ // key closed; set state bit in matrix
+ current_matrix[current_row] |= (ROW_SHIFTER << current_col);
+ } else {
+ // key open; clear state bit in matrix
+ current_matrix[current_row] &= ~(ROW_SHIFTER << current_col);
+ }
+
+ // Determine whether the matrix changed state
+ if ((last_row_value != current_matrix[current_row]) && !(matrix_changed))
+ {
+ matrix_changed = true;
+ }
+ }
+
+ unselect_col(current_col);
+
+ return matrix_changed;
+}
+
+static void select_col(uint8_t col)
+{
+ if (col_expanded[col]) {
+ // select on expander
+ if (expander_status) { // if there was an error
// do nothing
} else {
- // set active row low : 0
- // set other rows hi-Z : 1
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0xFF & ~(1<> 4) + 1) |= _BV(pin & 0xF); // OUT
+ _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
}
+static void unselect_col(uint8_t col)
+{
+ if (col_expanded[col]) {
+ // No need to explicitly unselect expander pins--their I/O state is
+ // set simultaneously, with a single bitmask sent to i2c_write. When
+ // select_col selects a single pin, it implicitly unselects all the
+ // other ones.
+ } else {
+ // unselect on teensy
+ uint8_t pin = onboard_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; x++) {
+ unselect_col(x);
+ }
+}
+#endif