1 files changed, 402 insertions, 0 deletions

diff --git a/keyboards/georgi/matrix.c b/keyboards/georgi/matrix.c
new file mode 100644
index 000000000..22079ac61
--- /dev/null
+++ b/keyboards/georgi/matrix.c
@@ -0,0 +1,402 @@
+/*
+Note for ErgoDox EZ customizers: Here be dragons!
+This is not a file you want to be messing with.
+All of the interesting stuff for you is under keymaps/ :)
+Love, Erez
+
+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 <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include "wait.h"
+#include "action_layer.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "keymap_steno.h"
+#include QMK_KEYBOARD_H
+#ifdef DEBUG_MATRIX_SCAN_RATE
+#include  "timer.h"
+#endif
+
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE     5
+#endif
+
+// MCP Pin Defs
+#define RROW1 (1<<3)
+#define RROW2 (1<<2)
+#define RROW3 (1<<1)
+#define RROW4 (1<<0)
+#define COL0 (1<<0)
+#define COL1 (1<<1)
+#define COL2 (1<<2)
+#define COL3 (1<<3)
+#define COL4 (1<<4)
+#define COL5 (1<<5)
+#define COL6 (1<<6)
+
+// ATmega pin defs
+#define ROW1  (1<<6)
+#define ROW2  (1<<5)
+#define ROW3  (1<<4)
+#define ROW4  (1<<1)
+#define COL7 (1<<0)
+#define COL8 (1<<1)
+#define COL9 (1<<2)
+#define COL10 (1<<3)
+#define COL11 (1<<2)
+#define COL12 (1<<3)
+#define COL13 (1<<6)
+
+
+// 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)
+
+/* 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 uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
+
+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 uint8_t mcp23018_reset_loop;
+// static uint16_t mcp23018_reset_loop;
+
+#ifdef DEBUG_MATRIX_SCAN_RATE
+uint32_t matrix_timer;
+uint32_t matrix_scan_count;
+#endif
+
+
+__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;
+        for (uint8_t j=0; j < MATRIX_COLS; ++j) {
+            debounce_matrix[i * MATRIX_COLS + j] = 0;
+        }
+    }
+
+#ifdef DEBUG_MATRIX_SCAN_RATE
+    matrix_timer = timer_read32();
+    matrix_scan_count = 0;
+#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;
+    }
+
+#ifdef DEBUG_MATRIX_SCAN_RATE
+    matrix_timer = timer_read32();
+    matrix_scan_count = 0;
+#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(matrix_row_t rawcols, uint8_t row) {
+  matrix_row_t result = 0;
+  matrix_row_t change = rawcols ^ raw_matrix[row];
+  raw_matrix[row] = rawcols;
+  for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
+    if (debounce_matrix[row * MATRIX_COLS + i]) {
+      --debounce_matrix[row * MATRIX_COLS + i];
+    } else {
+      result |= (1 << i);
+    }
+    if (change & (1 << i)) {
+      debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
+    }
+  }
+  return result;
+}
+
+matrix_row_t debounce_read_cols(uint8_t row) {
+  // Read the row without debouncing filtering and store it for later usage.
+  matrix_row_t cols = read_cols(row);
+  // Get the Debounce mask.
+  matrix_row_t mask = debounce_mask(cols, row);
+  // debounce the row and return the result.
+  return (cols & mask) | (matrix[row] & ~mask);;
+}
+
+uint8_t matrix_scan(void)
+{
+  // 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");
+          }
+      }
+  }
+
+#ifdef DEBUG_MATRIX_SCAN_RATE
+    matrix_scan_count++;
+    uint32_t timer_now = timer_read32();
+    if (TIMER_DIFF_32(timer_now, matrix_timer)>1000) {
+        print("matrix scan frequency: ");
+        pdec(matrix_scan_count);
+        print("\n");
+
+        matrix_timer = timer_now;
+        matrix_scan_count = 0;
+    }
+#endif
+    for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
+        select_row(i);
+        // and select on left hand
+        select_row(i + MATRIX_ROWS_PER_SIDE);
+        // we don't need a 30us delay anymore, because selecting a
+        // left-hand row requires more than 30us for i2c.
+
+        // grab cols from left hand
+        matrix[i] = debounce_read_cols(i);
+        // grab cols from right hand
+        matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);
+
+        unselect_rows();
+    }
+
+    matrix_scan_quantum();
+
+#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;
+}
+
+bool matrix_is_modified(void) // deprecated and evidently not called.
+{
+    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)
+{
+    return matrix[row];
+}
+
+void matrix_print(void)
+{
+    print("\nr/c 0123456789ABCDEF\n");
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        pbin_reverse16(matrix_get_row(row));
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += bitpop16(matrix[i]);
+    }
+    return count;
+}
+
+// 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, ERGODOX_EZ_I2C_TIMEOUT);    if (mcp23018_status) goto out;
+            mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);             if (mcp23018_status) goto out;
+            mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);     if (mcp23018_status) goto out;
+            mcp23018_status = i2c_read_nack(ERGODOX_EZ_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);
+    PORTB &= ~(BMASK);
+    DDRC  &= ~CMASK;
+    PORTC &= ~CMASK;
+    DDRD  &= ~DMASK;
+    PORTD &= ~DMASK;
+}
+
+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, ERGODOX_EZ_I2C_TIMEOUT);        if (mcp23018_status) goto out;
+            mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT);                 if (mcp23018_status) goto out;
+            mcp23018_status = i2c_write(0xFF & ~(1<<row), ERGODOX_EZ_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;
+        }
+    }
+}