7 files changed, 716 insertions, 764 deletions

diff --git a/quantum/split_common/matrix.c b/quantum/split_common/matrix.c
index e0f094e34b..313f7830b6 100644
--- a/quantum/split_common/matrix.c
+++ b/quantum/split_common/matrix.c
@@ -30,24 +30,24 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "transport.h"
 
 #ifdef ENCODER_ENABLE
-  #include "encoder.h"
+#    include "encoder.h"
 #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)
+#    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)
+#    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)
+#    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
 
 #define ERROR_DISCONNECT_COUNT 5
@@ -87,8 +87,8 @@ inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
 inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
 
 bool matrix_is_modified(void) {
-  if (debounce_active()) return false;
-  return true;
+    if (debounce_active()) return false;
+    return true;
 }
 
 inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
@@ -96,22 +96,22 @@ inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((mat
 inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
 
 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");
-  }
+    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;
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += matrix_bitpop(i);
+    }
+    return count;
 }
 
 // matrix code
@@ -119,224 +119,224 @@ uint8_t matrix_key_count(void) {
 #ifdef DIRECT_PINS
 
 static void init_pins(void) {
-  for (int row = 0; row < MATRIX_ROWS; row++) {
-    for (int col = 0; col < MATRIX_COLS; col++) {
-      pin_t pin = direct_pins[row][col];
-      if (pin != NO_PIN) {
-        setPinInputHigh(pin);
-      }
+    for (int row = 0; row < MATRIX_ROWS; row++) {
+        for (int col = 0; col < MATRIX_COLS; col++) {
+            pin_t pin = direct_pins[row][col];
+            if (pin != NO_PIN) {
+                setPinInputHigh(pin);
+            }
+        }
     }
-  }
 }
 
 static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
-  matrix_row_t last_row_value = current_matrix[current_row];
-  current_matrix[current_row] = 0;
+    matrix_row_t last_row_value = current_matrix[current_row];
+    current_matrix[current_row] = 0;
 
-  for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
-    pin_t pin = direct_pins[current_row][col_index];
-    if (pin != NO_PIN) {
-      current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
+    for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+        pin_t pin = direct_pins[current_row][col_index];
+        if (pin != NO_PIN) {
+            current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
+        }
     }
-  }
 
-  return (last_row_value != current_matrix[current_row]);
+    return (last_row_value != current_matrix[current_row]);
 }
 
 #elif (DIODE_DIRECTION == COL2ROW)
 
 static void select_row(uint8_t row) {
-  setPinOutput(row_pins[row]);
-  writePinLow(row_pins[row]);
+    setPinOutput(row_pins[row]);
+    writePinLow(row_pins[row]);
 }
 
 static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
 
 static void unselect_rows(void) {
-  for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-    setPinInputHigh(row_pins[x]);
-  }
+    for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
+        setPinInputHigh(row_pins[x]);
+    }
 }
 
 static void init_pins(void) {
-  unselect_rows();
-  for (uint8_t x = 0; x < MATRIX_COLS; x++) {
-    setPinInputHigh(col_pins[x]);
-  }
+    unselect_rows();
+    for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+        setPinInputHigh(col_pins[x]);
+    }
 }
 
 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];
+    // 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;
+    // 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);
+    // 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; col_index++) {
-    // Populate the matrix row with the state of the col pin
-    current_matrix[current_row] |= readPin(col_pins[col_index]) ? 0 : (ROW_SHIFTER << col_index);
-  }
+    // For each col...
+    for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+        // Populate the matrix row with the state of the col pin
+        current_matrix[current_row] |= readPin(col_pins[col_index]) ? 0 : (ROW_SHIFTER << col_index);
+    }
 
-  // Unselect row
-  unselect_row(current_row);
+    // Unselect row
+    unselect_row(current_row);
 
-  return (last_row_value != current_matrix[current_row]);
+    return (last_row_value != current_matrix[current_row]);
 }
 
 #elif (DIODE_DIRECTION == ROW2COL)
 
 static void select_col(uint8_t col) {
-  setPinOutput(col_pins[col]);
-  writePinLow(col_pins[col]);
+    setPinOutput(col_pins[col]);
+    writePinLow(col_pins[col]);
 }
 
 static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); }
 
 static void unselect_cols(void) {
-  for (uint8_t x = 0; x < MATRIX_COLS; x++) {
-    setPinInputHigh(col_pins[x]);
-  }
+    for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+        setPinInputHigh(col_pins[x]);
+    }
 }
 
 static void init_pins(void) {
-  unselect_cols();
-  for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-    setPinInputHigh(row_pins[x]);
-  }
+    unselect_cols();
+    for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
+        setPinInputHigh(row_pins[x]);
+    }
 }
 
 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 < ROWS_PER_HAND; 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 (readPin(row_pins[row_index])) {
-      // Pin HI, clear col bit
-      current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
-    } else {
-      // Pin LO, set col bit
-      current_matrix[row_index] |= (ROW_SHIFTER << 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 < ROWS_PER_HAND; 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 (readPin(row_pins[row_index])) {
+            // Pin HI, clear col bit
+            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+        } else {
+            // Pin LO, set 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;
+        // 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);
+    // Unselect col
+    unselect_col(current_col);
 
-  return matrix_changed;
+    return matrix_changed;
 }
 
 #endif
 
 void matrix_init(void) {
-  debug_enable = true;
-  debug_matrix = true;
-  debug_mouse  = true;
+    debug_enable = true;
+    debug_matrix = true;
+    debug_mouse  = true;
 
-  // Set pinout for right half if pinout for that half is defined
-  if (!isLeftHand) {
+    // Set pinout for right half if pinout for that half is defined
+    if (!isLeftHand) {
 #ifdef DIRECT_PINS_RIGHT
-    const pin_t direct_pins_right[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS_RIGHT;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-      for (uint8_t j = 0; j < MATRIX_COLS; j++) {
-        direct_pins[i][j] = direct_pins_right[i][j];
-      }
-    }
+        const pin_t direct_pins_right[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS_RIGHT;
+        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+            for (uint8_t j = 0; j < MATRIX_COLS; j++) {
+                direct_pins[i][j] = direct_pins_right[i][j];
+            }
+        }
 #endif
 #ifdef MATRIX_ROW_PINS_RIGHT
-    const pin_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-      row_pins[i] = row_pins_right[i];
-    }
+        const pin_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
+        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+            row_pins[i] = row_pins_right[i];
+        }
 #endif
 #ifdef MATRIX_COL_PINS_RIGHT
-    const pin_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
-    for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-      col_pins[i] = col_pins_right[i];
-    }
+        const pin_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
+        for (uint8_t i = 0; i < MATRIX_COLS; i++) {
+            col_pins[i] = col_pins_right[i];
+        }
 #endif
-  }
+    }
 
-  thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
-  thatHand = ROWS_PER_HAND - thisHand;
+    thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
+    thatHand = ROWS_PER_HAND - thisHand;
 
-  // initialize key pins
-  init_pins();
+    // initialize key pins
+    init_pins();
 
-  // initialize matrix state: all keys off
-  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-    matrix[i] = 0;
-  }
+    // initialize matrix state: all keys off
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+    }
 
-  debounce_init(ROWS_PER_HAND);
+    debounce_init(ROWS_PER_HAND);
 
-  matrix_init_quantum();
+    matrix_init_quantum();
 }
 
 uint8_t _matrix_scan(void) {
-  bool changed = false;
+    bool changed = false;
 
 #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
-  // Set row, read cols
-  for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
-    changed |= read_cols_on_row(raw_matrix, current_row);
-  }
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
+        changed |= read_cols_on_row(raw_matrix, current_row);
+    }
 #elif (DIODE_DIRECTION == ROW2COL)
-  // Set col, read rows
-  for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-    changed |= read_rows_on_col(raw_matrix, current_col);
-  }
+    // Set col, read rows
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+        changed |= read_rows_on_col(raw_matrix, current_col);
+    }
 #endif
 
-  debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
+    debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
 
-  return (uint8_t)changed;
+    return (uint8_t)changed;
 }
 
 uint8_t matrix_scan(void) {
-  uint8_t ret = _matrix_scan();
-
-  if (is_keyboard_master()) {
-    static uint8_t error_count;
-
-    if (!transport_master(matrix + thatHand)) {
-      error_count++;
-
-      if (error_count > ERROR_DISCONNECT_COUNT) {
-        // reset other half if disconnected
-        for (int i = 0; i < ROWS_PER_HAND; ++i) {
-          matrix[thatHand + i] = 0;
+    uint8_t ret = _matrix_scan();
+
+    if (is_keyboard_master()) {
+        static uint8_t error_count;
+
+        if (!transport_master(matrix + thatHand)) {
+            error_count++;
+
+            if (error_count > ERROR_DISCONNECT_COUNT) {
+                // reset other half if disconnected
+                for (int i = 0; i < ROWS_PER_HAND; ++i) {
+                    matrix[thatHand + i] = 0;
+                }
+            }
+        } else {
+            error_count = 0;
         }
-      }
-    } else {
-      error_count = 0;
-    }
 
-    matrix_scan_quantum();
-  } else {
-    transport_slave(matrix + thisHand);
+        matrix_scan_quantum();
+    } else {
+        transport_slave(matrix + thisHand);
 #ifdef ENCODER_ENABLE
-    encoder_read();
+        encoder_read();
 #endif
-    matrix_slave_scan_user();
-  }
+        matrix_slave_scan_user();
+    }
 
-  return ret;
+    return ret;
 }
diff --git a/quantum/split_common/post_config.h b/quantum/split_common/post_config.h
index ff0fc5e193..5c0b414fb3 100644
--- a/quantum/split_common/post_config.h
+++ b/quantum/split_common/post_config.h
@@ -1,19 +1,19 @@
 #if defined(USE_I2C) || defined(EH)
-  // When using I2C, using rgblight implicitly involves split support.
-  #if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_SPLIT)
-    #define RGBLIGHT_SPLIT
-  #endif
+// When using I2C, using rgblight implicitly involves split support.
+#    if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_SPLIT)
+#        define RGBLIGHT_SPLIT
+#    endif
 
-  #ifndef F_SCL
-    #define F_SCL 100000UL  // SCL frequency
-  #endif
+#    ifndef F_SCL
+#        define F_SCL 100000UL  // SCL frequency
+#    endif
 
 #else  // use serial
-  // When using serial, the user must define RGBLIGHT_SPLIT explicitly
-  //  in config.h as needed.
-  //      see quantum/rgblight_post_config.h
-  #if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    // When using serial and RGBLIGHT_SPLIT need separate transaction
-    #define SERIAL_USE_MULTI_TRANSACTION
-  #endif
+// When using serial, the user must define RGBLIGHT_SPLIT explicitly
+//  in config.h as needed.
+//      see quantum/rgblight_post_config.h
+#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+// When using serial and RGBLIGHT_SPLIT need separate transaction
+#        define SERIAL_USE_MULTI_TRANSACTION
+#    endif
 #endif
diff --git a/quantum/split_common/serial.c b/quantum/split_common/serial.c
index 322ab8030b..c4ef2a97e7 100644
--- a/quantum/split_common/serial.c
+++ b/quantum/split_common/serial.c
@@ -8,7 +8,7 @@
  */
 
 #ifndef F_CPU
-#define F_CPU 16000000
+#    define F_CPU 16000000
 #endif
 
 #include <avr/io.h>
@@ -21,252 +21,224 @@
 
 #ifdef SOFT_SERIAL_PIN
 
-#ifdef __AVR_ATmega32U4__
-  // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
-  #ifdef USE_AVR_I2C
-    #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
-      #error Using ATmega32U4 I2C, so can not use PD0, PD1
-    #endif
-  #endif
-
-  #define setPinInputHigh(pin)    (DDRx_ADDRESS(pin)  &= ~_BV((pin) & 0xF), \
-                                   PORTx_ADDRESS(pin) |=  _BV((pin) & 0xF))
-  #define setPinOutput(pin)       (DDRx_ADDRESS(pin)  |=  _BV((pin) & 0xF))
-  #define writePinHigh(pin)       (PORTx_ADDRESS(pin) |=  _BV((pin) & 0xF))
-  #define writePinLow(pin)        (PORTx_ADDRESS(pin) &= ~_BV((pin) & 0xF))
-  #define readPin(pin)            ((bool)(PINx_ADDRESS(pin) & _BV((pin) & 0xF)))
-
-  #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
-    #if SOFT_SERIAL_PIN == D0
-      #define EIMSK_BIT       _BV(INT0)
-      #define EICRx_BIT       (~(_BV(ISC00) | _BV(ISC01)))
-      #define SERIAL_PIN_INTERRUPT INT0_vect
-    #elif  SOFT_SERIAL_PIN == D1
-      #define EIMSK_BIT       _BV(INT1)
-      #define EICRx_BIT       (~(_BV(ISC10) | _BV(ISC11)))
-      #define SERIAL_PIN_INTERRUPT INT1_vect
-    #elif  SOFT_SERIAL_PIN == D2
-      #define EIMSK_BIT       _BV(INT2)
-      #define EICRx_BIT       (~(_BV(ISC20) | _BV(ISC21)))
-      #define SERIAL_PIN_INTERRUPT INT2_vect
-    #elif  SOFT_SERIAL_PIN == D3
-      #define EIMSK_BIT       _BV(INT3)
-      #define EICRx_BIT       (~(_BV(ISC30) | _BV(ISC31)))
-      #define SERIAL_PIN_INTERRUPT INT3_vect
-    #endif
-  #elif  SOFT_SERIAL_PIN == E6
-    #define EIMSK_BIT        _BV(INT6)
-    #define EICRx_BIT        (~(_BV(ISC60) | _BV(ISC61)))
-    #define SERIAL_PIN_INTERRUPT INT6_vect
-  #else
-  #error invalid SOFT_SERIAL_PIN value
-  #endif
-
-#else
- #error serial.c now support ATmega32U4 only
-#endif
-
-#define ALWAYS_INLINE __attribute__((always_inline))
-#define NO_INLINE __attribute__((noinline))
-#define _delay_sub_us(x)    __builtin_avr_delay_cycles(x)
+#    ifdef __AVR_ATmega32U4__
+// if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
+#        ifdef USE_AVR_I2C
+#            if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
+#                error Using ATmega32U4 I2C, so can not use PD0, PD1
+#            endif
+#        endif
+
+#        define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
+#        define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin)&0xF))
+#        define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
+#        define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
+#        define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))
+
+#        if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
+#            if SOFT_SERIAL_PIN == D0
+#                define EIMSK_BIT _BV(INT0)
+#                define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
+#                define SERIAL_PIN_INTERRUPT INT0_vect
+#            elif SOFT_SERIAL_PIN == D1
+#                define EIMSK_BIT _BV(INT1)
+#                define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
+#                define SERIAL_PIN_INTERRUPT INT1_vect
+#            elif SOFT_SERIAL_PIN == D2
+#                define EIMSK_BIT _BV(INT2)
+#                define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
+#                define SERIAL_PIN_INTERRUPT INT2_vect
+#            elif SOFT_SERIAL_PIN == D3
+#                define EIMSK_BIT _BV(INT3)
+#                define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
+#                define SERIAL_PIN_INTERRUPT INT3_vect
+#            endif
+#        elif SOFT_SERIAL_PIN == E6
+#            define EIMSK_BIT _BV(INT6)
+#            define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
+#            define SERIAL_PIN_INTERRUPT INT6_vect
+#        else
+#            error invalid SOFT_SERIAL_PIN value
+#        endif
+
+#    else
+#        error serial.c now support ATmega32U4 only
+#    endif
+
+#    define ALWAYS_INLINE __attribute__((always_inline))
+#    define NO_INLINE __attribute__((noinline))
+#    define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
 
 // parity check
-#define ODD_PARITY 1
-#define EVEN_PARITY 0
-#define PARITY EVEN_PARITY
-
-#ifdef SERIAL_DELAY
-  // custom setup in config.h
-  // #define TID_SEND_ADJUST 2
-  // #define SERIAL_DELAY 6             // micro sec
-  // #define READ_WRITE_START_ADJUST 30 // cycles
-  // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
-#else
+#    define ODD_PARITY 1
+#    define EVEN_PARITY 0
+#    define PARITY EVEN_PARITY
+
+#    ifdef SERIAL_DELAY
+// custom setup in config.h
+// #define TID_SEND_ADJUST 2
+// #define SERIAL_DELAY 6             // micro sec
+// #define READ_WRITE_START_ADJUST 30 // cycles
+// #define READ_WRITE_WIDTH_ADJUST 8 // cycles
+#    else
 // ============ Standard setups ============
 
-#ifndef SELECT_SOFT_SERIAL_SPEED
-#define SELECT_SOFT_SERIAL_SPEED 1
+#        ifndef SELECT_SOFT_SERIAL_SPEED
+#            define SELECT_SOFT_SERIAL_SPEED 1
 //  0: about 189kbps (Experimental only)
 //  1: about 137kbps (default)
 //  2: about 75kbps
 //  3: about 39kbps
 //  4: about 26kbps
 //  5: about 20kbps
-#endif
-
-#if __GNUC__ < 6
-  #define TID_SEND_ADJUST 14
-#else
-  #define TID_SEND_ADJUST 2
-#endif
-
-#if SELECT_SOFT_SERIAL_SPEED == 0
-  // Very High speed
-  #define SERIAL_DELAY 4             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 34 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 1
-  // High speed
-  #define SERIAL_DELAY 6             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 30 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 2
-  // Middle speed
-  #define SERIAL_DELAY 12            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 3
-  // Low speed
-  #define SERIAL_DELAY 24            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 4
-  // Very Low speed
-  #define SERIAL_DELAY 36            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 5
-  // Ultra Low speed
-  #define SERIAL_DELAY 48            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#else
-#error invalid SELECT_SOFT_SERIAL_SPEED value
-#endif /* SELECT_SOFT_SERIAL_SPEED */
-#endif /* SERIAL_DELAY */
-
-#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
-#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
-
-#define SLAVE_INT_WIDTH_US 1
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-  #define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-#else
-  #define SLAVE_INT_ACK_WIDTH_UNIT 2
-  #define SLAVE_INT_ACK_WIDTH 4
-#endif
-
-static SSTD_t *Transaction_table = NULL;
+#        endif
+
+#        if __GNUC__ < 6
+#            define TID_SEND_ADJUST 14
+#        else
+#            define TID_SEND_ADJUST 2
+#        endif
+
+#        if SELECT_SOFT_SERIAL_SPEED == 0
+// Very High speed
+#            define SERIAL_DELAY 4  // micro sec
+#            if __GNUC__ < 6
+#                define READ_WRITE_START_ADJUST 33  // cycles
+#                define READ_WRITE_WIDTH_ADJUST 3   // cycles
+#            else
+#                define READ_WRITE_START_ADJUST 34  // cycles
+#                define READ_WRITE_WIDTH_ADJUST 7   // cycles
+#            endif
+#        elif SELECT_SOFT_SERIAL_SPEED == 1
+// High speed
+#            define SERIAL_DELAY 6  // micro sec
+#            if __GNUC__ < 6
+#                define READ_WRITE_START_ADJUST 30  // cycles
+#                define READ_WRITE_WIDTH_ADJUST 3   // cycles
+#            else
+#                define READ_WRITE_START_ADJUST 33  // cycles
+#                define READ_WRITE_WIDTH_ADJUST 7   // cycles
+#            endif
+#        elif SELECT_SOFT_SERIAL_SPEED == 2
+// Middle speed
+#            define SERIAL_DELAY 12             // micro sec
+#            define READ_WRITE_START_ADJUST 30  // cycles
+#            if __GNUC__ < 6
+#                define READ_WRITE_WIDTH_ADJUST 3  // cycles
+#            else
+#                define READ_WRITE_WIDTH_ADJUST 7  // cycles
+#            endif
+#        elif SELECT_SOFT_SERIAL_SPEED == 3
+// Low speed
+#            define SERIAL_DELAY 24             // micro sec
+#            define READ_WRITE_START_ADJUST 30  // cycles
+#            if __GNUC__ < 6
+#                define READ_WRITE_WIDTH_ADJUST 3  // cycles
+#            else
+#                define READ_WRITE_WIDTH_ADJUST 7  // cycles
+#            endif
+#        elif SELECT_SOFT_SERIAL_SPEED == 4
+// Very Low speed
+#            define SERIAL_DELAY 36             // micro sec
+#            define READ_WRITE_START_ADJUST 30  // cycles
+#            if __GNUC__ < 6
+#                define READ_WRITE_WIDTH_ADJUST 3  // cycles
+#            else
+#                define READ_WRITE_WIDTH_ADJUST 7  // cycles
+#            endif
+#        elif SELECT_SOFT_SERIAL_SPEED == 5
+// Ultra Low speed
+#            define SERIAL_DELAY 48             // micro sec
+#            define READ_WRITE_START_ADJUST 30  // cycles
+#            if __GNUC__ < 6
+#                define READ_WRITE_WIDTH_ADJUST 3  // cycles
+#            else
+#                define READ_WRITE_WIDTH_ADJUST 7  // cycles
+#            endif
+#        else
+#            error invalid SELECT_SOFT_SERIAL_SPEED value
+#        endif /* SELECT_SOFT_SERIAL_SPEED */
+#    endif     /* SERIAL_DELAY */
+
+#    define SERIAL_DELAY_HALF1 (SERIAL_DELAY / 2)
+#    define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY / 2)
+
+#    define SLAVE_INT_WIDTH_US 1
+#    ifndef SERIAL_USE_MULTI_TRANSACTION
+#        define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
+#    else
+#        define SLAVE_INT_ACK_WIDTH_UNIT 2
+#        define SLAVE_INT_ACK_WIDTH 4
+#    endif
+
+static SSTD_t *Transaction_table      = NULL;
 static uint8_t Transaction_table_size = 0;
 
 inline static void serial_delay(void) ALWAYS_INLINE;
-inline static
-void serial_delay(void) {
-  _delay_us(SERIAL_DELAY);
-}
+inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); }
 
 inline static void serial_delay_half1(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half1(void) {
-  _delay_us(SERIAL_DELAY_HALF1);
-}
+inline static void serial_delay_half1(void) { _delay_us(SERIAL_DELAY_HALF1); }
 
 inline static void serial_delay_half2(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half2(void) {
-  _delay_us(SERIAL_DELAY_HALF2);
-}
+inline static void serial_delay_half2(void) { _delay_us(SERIAL_DELAY_HALF2); }
 
 inline static void serial_output(void) ALWAYS_INLINE;
-inline static
-void serial_output(void) {
-  setPinOutput(SOFT_SERIAL_PIN);
-}
+inline static void serial_output(void) { setPinOutput(SOFT_SERIAL_PIN); }
 
 // make the serial pin an input with pull-up resistor
 inline static void serial_input_with_pullup(void) ALWAYS_INLINE;
-inline static
-void serial_input_with_pullup(void) {
-  setPinInputHigh(SOFT_SERIAL_PIN);
-}
+inline static void serial_input_with_pullup(void) { setPinInputHigh(SOFT_SERIAL_PIN); }
 
 inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
-inline static
-uint8_t serial_read_pin(void) {
-  return !! readPin(SOFT_SERIAL_PIN);
-}
+inline static uint8_t serial_read_pin(void) { return !!readPin(SOFT_SERIAL_PIN); }
 
 inline static void serial_low(void) ALWAYS_INLINE;
-inline static
-void serial_low(void) {
-  writePinLow(SOFT_SERIAL_PIN);
-}
+inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
 
 inline static void serial_high(void) ALWAYS_INLINE;
-inline static
-void serial_high(void) {
-  writePinHigh(SOFT_SERIAL_PIN);
-}
+inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
 
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
+void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size) {
+    Transaction_table      = sstd_table;
     Transaction_table_size = (uint8_t)sstd_table_size;
     serial_output();
     serial_high();
 }
 
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
+void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
+    Transaction_table      = sstd_table;
     Transaction_table_size = (uint8_t)sstd_table_size;
     serial_input_with_pullup();
 
     // Enable INT0-INT3,INT6
     EIMSK |= EIMSK_BIT;
-#if SOFT_SERIAL_PIN == E6
+#    if SOFT_SERIAL_PIN == E6
     // Trigger on falling edge of INT6
     EICRB &= EICRx_BIT;
-#else
+#    else
     // Trigger on falling edge of INT0-INT3
     EICRA &= EICRx_BIT;
-#endif
+#    endif
 }
 
 // Used by the sender to synchronize timing with the reciver.
 static void sync_recv(void) NO_INLINE;
-static
-void sync_recv(void) {
-  for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
-  }
-  // This shouldn't hang if the target disconnects because the
-  // serial line will float to high if the target does disconnect.
-  while (!serial_read_pin());
+static void sync_recv(void) {
+    for (uint8_t i = 0; i < SERIAL_DELAY * 5 && serial_read_pin(); i++) {
+    }
+    // This shouldn't hang if the target disconnects because the
+    // serial line will float to high if the target does disconnect.
+    while (!serial_read_pin())
+        ;
 }
 
 // Used by the reciver to send a synchronization signal to the sender.
 static void sync_send(void) NO_INLINE;
-static
-void sync_send(void) {
-  serial_low();
-  serial_delay();
-  serial_high();
+static void sync_send(void) {
+    serial_low();
+    serial_delay();
+    serial_high();
 }
 
 // Reads a byte from the serial line
@@ -274,92 +246,94 @@ static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
 static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
     uint8_t byte, i, p, pb;
 
-  _delay_sub_us(READ_WRITE_START_ADJUST);
-  for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
-      serial_delay_half1();   // read the middle of pulses
-      if( serial_read_pin() ) {
-          byte = (byte << 1) | 1; p ^= 1;
-      } else {
-          byte = (byte << 1) | 0; p ^= 0;
-      }
-      _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
-      serial_delay_half2();
-  }
-  /* recive parity bit */
-  serial_delay_half1();   // read the middle of pulses
-  pb = serial_read_pin();
-  _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
-  serial_delay_half2();
-
-  *pterrcount += (p != pb)? 1 : 0;
-
-  return byte;
+    _delay_sub_us(READ_WRITE_START_ADJUST);
+    for (i = 0, byte = 0, p = PARITY; i < bit; i++) {
+        serial_delay_half1();  // read the middle of pulses
+        if (serial_read_pin()) {
+            byte = (byte << 1) | 1;
+            p ^= 1;
+        } else {
+            byte = (byte << 1) | 0;
+            p ^= 0;
+        }
+        _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
+        serial_delay_half2();
+    }
+    /* recive parity bit */
+    serial_delay_half1();  // read the middle of pulses
+    pb = serial_read_pin();
+    _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
+    serial_delay_half2();
+
+    *pterrcount += (p != pb) ? 1 : 0;
+
+    return byte;
 }
 
 // Sends a byte with MSB ordering
 void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
 void serial_write_chunk(uint8_t data, uint8_t bit) {
     uint8_t b, p;
-    for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
-        if(data & b) {
-            serial_high(); p ^= 1;
+    for (p = PARITY, b = 1 << (bit - 1); b; b >>= 1) {
+        if (data & b) {
+            serial_high();
+            p ^= 1;
         } else {
-            serial_low();  p ^= 0;
+            serial_low();
+            p ^= 0;
         }
         serial_delay();
     }
     /* send parity bit */
-    if(p & 1) { serial_high(); }
-    else      { serial_low(); }
+    if (p & 1) {
+        serial_high();
+    } else {
+        serial_low();
+    }
     serial_delay();
 
-    serial_low(); // sync_send() / senc_recv() need raise edge
+    serial_low();  // sync_send() / senc_recv() need raise edge
 }
 
 static void serial_send_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-void serial_send_packet(uint8_t *buffer, uint8_t size) {
-  for (uint8_t i = 0; i < size; ++i) {
-    uint8_t data;
-    data = buffer[i];
-    sync_send();
-    serial_write_chunk(data,8);
-  }
+static void serial_send_packet(uint8_t *buffer, uint8_t size) {
+    for (uint8_t i = 0; i < size; ++i) {
+        uint8_t data;
+        data = buffer[i];
+        sync_send();
+        serial_write_chunk(data, 8);
+    }
 }
 
 static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) {
-  uint8_t pecount = 0;