[Keyboard] Convert ErgoDox EZ to Matrix Lite (#10189)

* Convert ErgoDox EZ to lite matrix

* Add initial config from Dactyl config

Based on ErinCall's work to generalize the mcp i/o expander matrix code

* formatting

* Fix number of pins

* Remove unused defines

5 files changed, 151 insertions, 218 deletions

diff --git a/keyboards/ergodox_ez/config.h b/keyboards/ergodox_ez/config.h
index 8ef600b08..eb0f2066d 100644
--- a/keyboards/ergodox_ez/config.h
+++ b/keyboards/ergodox_ez/config.h
@@ -32,6 +32,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS_PER_SIDE (MATRIX_ROWS / 2)
 #define MATRIX_COLS 6
 
+#define COL_EXPANDED { true, true, true, true, true, true, true, false, false, false, false, false, false, false }
+#define MATRIX_ONBOARD_ROW_PINS { 0, 0, 0, 0, 0, 0, 0, B0,  B1,  B2,  B3,  D2,  D3,  C6 }
+#define MATRIX_ONBOARD_COL_PINS { F0,  F1,  F4,  F5,  F6,  F7 }
+#define DIODE_DIRECTION COL2ROW
+#define EXPANDER_COL_REGISTER GPIOB
+#define EXPANDER_ROW_REGISTER GPIOA
+#define MATRIX_EXPANDER_COL_PINS { 5, 4, 3, 2, 1, 0 }
+#define MATRIX_EXPANDER_ROW_PINS { 0, 1, 2, 3, 4, 5, 6 }
+
+
 #define MOUSEKEY_INTERVAL       20
 #define MOUSEKEY_DELAY          0
 #define MOUSEKEY_TIME_TO_MAX    60
diff --git a/keyboards/ergodox_ez/ergodox_ez.c b/keyboards/ergodox_ez/ergodox_ez.c
index d313f7d5d..6c0b74ec4 100644
--- a/keyboards/ergodox_ez/ergodox_ez.c
+++ b/keyboards/ergodox_ez/ergodox_ez.c
@@ -1,4 +1,4 @@
-#include QMK_KEYBOARD_H
+#include "ergodox_ez.h"
 
 extern inline void ergodox_board_led_on(void);
 extern inline void ergodox_right_led_1_on(void);
diff --git a/keyboards/ergodox_ez/ergodox_ez.h b/keyboards/ergodox_ez/ergodox_ez.h
index 88a0a2ee9..a8b02a96b 100644
--- a/keyboards/ergodox_ez/ergodox_ez.h
+++ b/keyboards/ergodox_ez/ergodox_ez.h
@@ -4,10 +4,6 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "i2c_master.h"
-#include <util/delay.h>
-
-#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
-#define CPU_16MHz       0x00
 
 // I2C aliases and register addresses (see "mcp23018.md")
 #define I2C_ADDR        0b0100000
diff --git a/keyboards/ergodox_ez/matrix.c b/keyboards/ergodox_ez/matrix.c
index 28dc37a09..cfa76c1c3 100644
--- a/keyboards/ergodox_ez/matrix.c
+++ b/keyboards/ergodox_ez/matrix.c
@@ -30,7 +30,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "util.h"
 #include "matrix.h"
 #include "debounce.h"
-#include QMK_KEYBOARD_H
+#include "ergodox_ez.h"
+
 
 /*
  * This constant define not debouncing time in msecs, assuming eager_pr.
@@ -45,8 +46,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /* matrix state(1:on, 0:off) */
-static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
-static matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
 
 static matrix_row_t read_cols(uint8_t row);
 static void         init_cols(void);
@@ -54,132 +55,62 @@ static void         unselect_rows(void);
 static void         select_row(uint8_t row);
 
 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; }
+void matrix_init_custom(void) {
+    // initialize row and col
 
-inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
+    mcp23018_status = init_mcp23018();
 
-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_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;
-  }
+    unselect_rows();
+    init_cols();
 }
 
 // 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;
+    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) {
-  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");
-        ergodox_blink_all_leds();
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+    if (mcp23018_status) {  // if there was an error
+        if (++mcp23018_reset_loop == 0) {
+            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");
+                ergodox_blink_all_leds();
 #ifdef RGB_MATRIX_ENABLE
-        rgb_matrix_init(); // re-init driver on reconnect
+                rgb_matrix_init();  // re-init driver on reconnect
 #endif
-      }
+            }
+        }
     }
-  }
 
 #ifdef LEFT_LEDS
-  mcp23018_status = ergodox_left_leds_update();
+    mcp23018_status = ergodox_left_leds_update();
 #endif  // LEFT_LEDS
-  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_quantum();
-
-  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");
-  }
-}
+    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);
+
+        changed |= store_raw_matrix_row(left_index);
+        changed |= store_raw_matrix_row(right_index);
+
+        unselect_rows();
+    }
 
-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;
+    return changed;
 }
 
 /* Column pin configuration
@@ -193,42 +124,43 @@ uint8_t matrix_key_count(void) {
  * pin: B5  B4  B3  B2  B1  B0
  */
 static void init_cols(void) {
-  // init on mcp23018
-  // not needed, already done as part of init_mcp23018()
-
-  // init on teensy
-  // Input with pull-up(DDR:0, PORT:1)
-  DDRF &= ~(1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
-  PORTF |= (1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
+    // init on mcp23018
+    // not needed, already done as part of init_mcp23018()
+
+    // init on teensy
+    setPinInputHigh(F0);
+    setPinInputHigh(F1);
+    setPinInputHigh(F4);
+    setPinInputHigh(F5);
+    setPinInputHigh(F6);
+    setPinInputHigh(F7);
 }
 
 static matrix_row_t read_cols(uint8_t row) {
-  if (row < 7) {
-    if (mcp23018_status) {  // if there was an error
-      return 0;
+    if (row < 7) {
+        if (mcp23018_status) {  // if there was an error
+            return 0;
+        } else {
+            uint8_t data = 0;
+            // reading GPIOB (column port) since in mcp23018's sequential mode
+            // it is addressed directly after writing to GPIOA in select_row()
+            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();
+            return data;
+        }
     } else {
-      uint8_t data    = 0;
-      // reading GPIOB (column port) since in mcp23018's sequential mode
-      // it is addressed directly after writing to GPIOA in select_row()
-      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();
-      return data;
-    }
-  } else {
-    /* read from teensy
-     * bitmask is 0b11110011, but we want those all
-     * in the lower six bits.
-     * we'll return 1s for the top two, but that's harmless.
-     */
+        /* read from teensy
+         * bitmask is 0b11110011, but we want those all
+         * in the lower six bits.
+         * we'll return 1s for the top two, but that's harmless.
+         */
 
-    return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
-  }
+        return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
+    }
 }
 
 /* Row pin configuration
@@ -242,69 +174,64 @@ static matrix_row_t read_cols(uint8_t row) {
  * pin: A0  A1  A2  A3  A4  A5  A6
  */
 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
-
-  // unselect on teensy
-  // Hi-Z(DDR:0, PORT:0) to unselect
-  DDRB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
-  PORTB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
-  DDRD &= ~(1 << 2 | 1 << 3);
-  PORTD &= ~(1 << 2 | 1 << 3);
-  DDRC &= ~(1 << 6);
-  PORTC &= ~(1 << 6);
+    // 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
+
+    // unselect on teensy
+    setPinInput(B0);
+    setPinInput(B1);
+    setPinInput(B2);
+    setPinInput(B3);
+    setPinInput(D2);
+    setPinInput(D3);
+    setPinInput(C6);
 }
 
 static void select_row(uint8_t row) {
-  if (row < 7) {
-    // select on mcp23018
-    if (mcp23018_status) {  // if there was an error
-                            // do nothing
+    if (row < 7) {
+        // select on mcp23018
+        if (!mcp23018_status) {
+            // 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 {
-      // 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 {
-    // select on teensy
-    // Output low(DDR:1, PORT:0) to select
-    switch (row) {
-      case 7:
-        DDRB |= (1 << 0);
-        PORTB &= ~(1 << 0);
-        break;
-      case 8:
-        DDRB |= (1 << 1);
-        PORTB &= ~(1 << 1);
-        break;
-      case 9:
-        DDRB |= (1 << 2);
-        PORTB &= ~(1 << 2);
-        break;
-      case 10:
-        DDRB |= (1 << 3);
-        PORTB &= ~(1 << 3);
-        break;
-      case 11:
-        DDRD |= (1 << 2);
-        PORTD &= ~(1 << 2);
-        break;
-      case 12:
-        DDRD |= (1 << 3);
-        PORTD &= ~(1 << 3);
-        break;
-      case 13:
-        DDRC |= (1 << 6);
-        PORTC &= ~(1 << 6);
-        break;
+        // select on teensy
+        // Output low(DDR:1, PORT:0) to select
+        switch (row) {
+            case 7:
+                setPinOutput(B0);
+                writePinLow(B0);
+                break;
+            case 8:
+                setPinOutput(B1);
+                writePinLow(B1);
+                break;
+            case 9:
+                setPinOutput(B2);
+                writePinLow(B2);
+                break;
+            case 10:
+                setPinOutput(B3);
+                writePinLow(B3);
+                break;
+            case 11:
+                setPinOutput(D2);
+                writePinLow(D2);
+                break;
+            case 12:
+                setPinOutput(D3);
+                writePinLow(D3);
+                break;
+            case 13:
+                setPinOutput(C6);
+                writePinLow(C6);
+                break;
+        }
     }
-  }
 }
diff --git a/keyboards/ergodox_ez/rules.mk b/keyboards/ergodox_ez/rules.mk
index 579e4f59d..9ad4eaa18 100644
--- a/keyboards/ergodox_ez/rules.mk
+++ b/keyboards/ergodox_ez/rules.mk
@@ -19,20 +19,20 @@ BOOTLOADER = halfkay
 # Build Options
 #   comment out to disable the options.
 #
-BOOTMAGIC_ENABLE = no  # Virtual DIP switch configuration
-MOUSEKEY_ENABLE  = yes # Mouse keys
-EXTRAKEY_ENABLE  = yes # Audio control and System control
-CONSOLE_ENABLE   = no  # Console for debug
-COMMAND_ENABLE   = yes # Commands for debug and configuration
-CUSTOM_MATRIX    = yes # Custom matrix file for the ErgoDox EZ
-NKRO_ENABLE      = yes # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-UNICODE_ENABLE   = yes # Unicode
-SWAP_HANDS_ENABLE= yes # Allow swapping hands of keyboard
+BOOTMAGIC_ENABLE = no   # Virtual DIP switch configuration
+MOUSEKEY_ENABLE  = yes  # Mouse keys
+EXTRAKEY_ENABLE  = yes  # Audio control and System control
+CONSOLE_ENABLE   = no   # Console for debug
+COMMAND_ENABLE   = yes  # Commands for debug and configuration
+CUSTOM_MATRIX    = lite # Custom matrix file for the ErgoDox EZ
+NKRO_ENABLE      = yes  # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+UNICODE_ENABLE   = yes  # Unicode
+SWAP_HANDS_ENABLE= yes  # Allow swapping hands of keyboard
 SLEEP_LED_ENABLE = no
 API_SYSEX_ENABLE = no
 RGBLIGHT_ENABLE = yes
 
-RGB_MATRIX_ENABLE = no # enable later
+RGB_MATRIX_ENABLE = no  # enable later
 DEBOUNCE_TYPE = eager_pr
 
 # project specific files