Remove legacy USE_SERIAL define (#18292)

* Remove legacy USE_SERIAL define

* tidy up missed comments

37 files changed, 3 insertions, 84 deletions

diff --git a/keyboards/handwired/brain/keymaps/klackygears/config.h b/keyboards/handwired/brain/keymaps/klackygears/config.h
index 4dd99c8b3a..5115f01801 100644
--- a/keyboards/handwired/brain/keymaps/klackygears/config.h
+++ b/keyboards/handwired/brain/keymaps/klackygears/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-//#define USE_SERIAL
-
 #define PERMISSIVE_HOLD
 #define TAPPING_TERM 150
 #define IGNORE_MOD_TAP_INTERRUPT
diff --git a/keyboards/handwired/chiron/keymaps/default/config.h b/keyboards/handwired/chiron/keymaps/default/config.h
index 08134a720b..e67664253c 100644
--- a/keyboards/handwired/chiron/keymaps/default/config.h
+++ b/keyboards/handwired/chiron/keymaps/default/config.h
@@ -16,7 +16,6 @@
 
 #pragma once
 
-#define USE_SERIAL
 #define MASTER_RIGHT
 //#define MASTER_LEFT
 
diff --git a/keyboards/handwired/dactyl_manuform/3x5_3/config.h b/keyboards/handwired/dactyl_manuform/3x5_3/config.h
index 804db6c7e3..ccd9d0cdc4 100644
--- a/keyboards/handwired/dactyl_manuform/3x5_3/config.h
+++ b/keyboards/handwired/dactyl_manuform/3x5_3/config.h
@@ -18,10 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "config_common.h"
 
-// Communication
-// #define USE_I2C
-#define USE_SERIAL
-
 /* key matrix size */
 // Rows are doubled-up
 #define MATRIX_ROWS 8
diff --git a/keyboards/handwired/dactyl_manuform/4x5/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/4x5/keymaps/default/config.h
index 18320c0952..335ac8cd3e 100644
--- a/keyboards/handwired/dactyl_manuform/4x5/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/4x5/keymaps/default/config.h
@@ -20,10 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-//#define USE_I2C
-
 /* Select hand configuration */
 //#define MASTER_LEFT
 //#define MASTER_RIGHT
diff --git a/keyboards/handwired/dactyl_manuform/4x5/keymaps/dvorak/config.h b/keyboards/handwired/dactyl_manuform/4x5/keymaps/dvorak/config.h
index 6b0ddbfe8e..cbacb25ca4 100644
--- a/keyboards/handwired/dactyl_manuform/4x5/keymaps/dvorak/config.h
+++ b/keyboards/handwired/dactyl_manuform/4x5/keymaps/dvorak/config.h
@@ -20,11 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 // #define MASTER_LEFT
diff --git a/keyboards/handwired/dactyl_manuform/4x5/keymaps/ibnuda/config.h b/keyboards/handwired/dactyl_manuform/4x5/keymaps/ibnuda/config.h
index 07a1323db2..a597d848e2 100644
--- a/keyboards/handwired/dactyl_manuform/4x5/keymaps/ibnuda/config.h
+++ b/keyboards/handwired/dactyl_manuform/4x5/keymaps/ibnuda/config.h
@@ -20,11 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/handwired/dactyl_manuform/4x6/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/4x6/keymaps/default/config.h
index 18320c0952..335ac8cd3e 100644
--- a/keyboards/handwired/dactyl_manuform/4x6/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/4x6/keymaps/default/config.h
@@ -20,10 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-//#define USE_I2C
-
 /* Select hand configuration */
 //#define MASTER_LEFT
 //#define MASTER_RIGHT
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/333fred/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/333fred/config.h
index 87b5b66375..9ee1c3e3cb 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/333fred/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/333fred/config.h
@@ -22,7 +22,6 @@
 
 #pragma once
 
-#define USE_SERIAL
 #define EE_HANDS
 
 #undef TAPPING_TERM
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/default/config.h
index 5a20f9473f..4d83c191f3 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 //#define MASTER_RIGHT
 
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/impstyle/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/impstyle/config.h
index d046806eaa..68900af390 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/impstyle/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/impstyle/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 //#define EE_HANDS
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/rishka/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/rishka/config.h
index 98dc760031..bcfea1f14f 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/rishka/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/rishka/config.h
@@ -18,8 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-
-// #define USE_SERIAL
 #define USE_I2C
 // #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/squirrel/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/squirrel/config.h
index e8899a3689..626fe3cbdc 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/squirrel/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/squirrel/config.h
@@ -18,9 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 //#define EE_HANDS
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/swedish/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/swedish/config.h
index 29ab59ad66..b63c5788d1 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/swedish/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/swedish/config.h
@@ -18,9 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 //#define EE_HANDS
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/thattolleyguy/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/thattolleyguy/config.h
index 2caa5b5bd1..8625389eba 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/thattolleyguy/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/thattolleyguy/config.h
@@ -18,10 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-
-#define USE_SERIAL
-// #define USE_I2C
-
 // #define MASTER_LEFT
 // #define MASTER_RIGHT
 #define EE_HANDS
diff --git a/keyboards/handwired/dactyl_manuform/5x6/keymaps/uqs/config.h b/keyboards/handwired/dactyl_manuform/5x6/keymaps/uqs/config.h
index 4eca68c542..af5842e602 100644
--- a/keyboards/handwired/dactyl_manuform/5x6/keymaps/uqs/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6/keymaps/uqs/config.h
@@ -2,8 +2,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
-#define USE_SERIAL
-
 #define RGBLED_NUM 12
 #define RGBLED_SPLIT {6,6}
 #define RGBLIGHT_LIMIT_VAL 127
diff --git a/keyboards/handwired/dactyl_manuform/5x6_2_5/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/5x6_2_5/keymaps/default/config.h
index c4fb3742d9..9c1430e431 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_2_5/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_2_5/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define EE_HANDS
 
 #define KINETIC_SPEED
diff --git a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/333fred/config.h b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/333fred/config.h
index eea543ae24..68ea3f1933 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/333fred/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/333fred/config.h
@@ -22,7 +22,6 @@
 
 #pragma once
 
-#define USE_SERIAL
 #define EE_HANDS
 
 #undef TAPPING_TERM
diff --git a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/cykedev/config.h b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/cykedev/config.h
index 9ae7b44a69..5a94cd1760 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/cykedev/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/cykedev/config.h
@@ -25,7 +25,6 @@
 #undef BOOTMAGIC_LITE_COLUMN_RIGHT
 
 
-#define USE_SERIAL
 #define SOFT_SERIAL_PIN D2
 #define EE_HANDS
 // #define SPLIT_USB_DETECT
diff --git a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/default/config.h
index c4fb3742d9..9c1430e431 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define EE_HANDS
 
 #define KINETIC_SPEED
diff --git a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/via/config.h b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/via/config.h
index dc2d3ee111..f898b9cbd3 100755
--- a/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/via/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_5/keymaps/via/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define EE_HANDS
 
-#define KINETIC_SPEED
\ No newline at end of file
+#define KINETIC_SPEED
diff --git a/keyboards/handwired/dactyl_manuform/5x7/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/5x7/keymaps/default/config.h
index 5a20f9473f..4d83c191f3 100644
--- a/keyboards/handwired/dactyl_manuform/5x7/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x7/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 //#define MASTER_RIGHT
 
diff --git a/keyboards/handwired/dactyl_manuform/5x7/keymaps/via/config.h b/keyboards/handwired/dactyl_manuform/5x7/keymaps/via/config.h
index 5a20f9473f..4d83c191f3 100644
--- a/keyboards/handwired/dactyl_manuform/5x7/keymaps/via/config.h
+++ b/keyboards/handwired/dactyl_manuform/5x7/keymaps/via/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 //#define MASTER_RIGHT
 
diff --git a/keyboards/handwired/dactyl_manuform/6x6/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/6x6/keymaps/default/config.h
index 5a20f9473f..4d83c191f3 100644
--- a/keyboards/handwired/dactyl_manuform/6x6/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/6x6/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 //#define MASTER_RIGHT
 
diff --git a/keyboards/handwired/dactyl_manuform/dmote/62key/keymaps/default/config.h b/keyboards/handwired/dactyl_manuform/dmote/62key/keymaps/default/config.h
index 2e1d4f8dc3..1809262044 100644
--- a/keyboards/handwired/dactyl_manuform/dmote/62key/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_manuform/dmote/62key/keymaps/default/config.h
@@ -1,5 +1,3 @@
 #pragma once
 
-#define USE_SERIAL
-
 #define EE_HANDS
diff --git a/keyboards/handwired/dactyl_promicro/keymaps/default/config.h b/keyboards/handwired/dactyl_promicro/keymaps/default/config.h
index ce8f3501ad..bbcd4fdcf6 100644
--- a/keyboards/handwired/dactyl_promicro/keymaps/default/config.h
+++ b/keyboards/handwired/dactyl_promicro/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_RIGHT
 // #define MASTER_RIGHT
 //#define EE_HANDS
diff --git a/keyboards/handwired/dactyl_promicro/keymaps/impstyle/config.h b/keyboards/handwired/dactyl_promicro/keymaps/impstyle/config.h
index ce8f3501ad..bbcd4fdcf6 100644
--- a/keyboards/handwired/dactyl_promicro/keymaps/impstyle/config.h
+++ b/keyboards/handwired/dactyl_promicro/keymaps/impstyle/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_RIGHT
 // #define MASTER_RIGHT
 //#define EE_HANDS
diff --git a/keyboards/handwired/elrgo_s/keymaps/default/config.h b/keyboards/handwired/elrgo_s/keymaps/default/config.h
index f3ef42b9b4..b5f8c85421 100644
--- a/keyboards/handwired/elrgo_s/keymaps/default/config.h
+++ b/keyboards/handwired/elrgo_s/keymaps/default/config.h
@@ -12,11 +12,9 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */ 
+ */
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/handwired/ks63/config.h b/keyboards/handwired/ks63/config.h
index 565c48ab9e..31ea4bbe32 100644
--- a/keyboards/handwired/ks63/config.h
+++ b/keyboards/handwired/ks63/config.h
@@ -68,5 +68,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_ONESHOT
 
 #define MASTER_LEFT
-#define USE_SERIAL
 
diff --git a/keyboards/handwired/myskeeb/config.h b/keyboards/handwired/myskeeb/config.h
index 0e64b01274..06e8782290 100644
--- a/keyboards/handwired/myskeeb/config.h
+++ b/keyboards/handwired/myskeeb/config.h
@@ -15,7 +15,6 @@
 
 // Comunication and Split Detection
 
-#define USE_SERIAL
 #define SOFT_SERIAL_PIN D3
 #define SELECT_SOFT_SERIAL_SPEED 1
 #define SPLIT_USB_DETECT
diff --git a/keyboards/handwired/not_so_minidox/config.h b/keyboards/handwired/not_so_minidox/config.h
index e137931a1a..66615a3927 100644
--- a/keyboards/handwired/not_so_minidox/config.h
+++ b/keyboards/handwired/not_so_minidox/config.h
@@ -31,8 +31,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { B6, B2, B3, B1, F7, D4 }
 
-#define USE_SERIAL
-
 /*
  * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
  */
diff --git a/keyboards/handwired/qc60/keymaps/wntrmln/config.h b/keyboards/handwired/qc60/keymaps/wntrmln/config.h
index fabebda534..10887bdf18 100644
--- a/keyboards/handwired/qc60/keymaps/wntrmln/config.h
+++ b/keyboards/handwired/qc60/keymaps/wntrmln/config.h
@@ -1,5 +1,3 @@
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
diff --git a/keyboards/handwired/split89/config.h b/keyboards/handwired/split89/config.h
index 8cb8f4e1ea..b6e8157d2c 100644
--- a/keyboards/handwired/split89/config.h
+++ b/keyboards/handwired/split89/config.h
@@ -54,7 +54,6 @@ COLS = number of cols per side which curently needs to be equal so there are bla
  * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
  */
 #define SOFT_SERIAL_PIN D0  // or D1, D2, D3, E6
-#define USE_SERIAL
 
 //#define LED_NUM_LOCK_PIN B0
 //#define LED_CAPS_LOCK_PIN B1
diff --git a/keyboards/handwired/stef9998/split_5x7/keymaps/default/config.h b/keyboards/handwired/stef9998/split_5x7/keymaps/default/config.h
index 2a19e47502..4afee280a0 100644
--- a/keyboards/handwired/stef9998/split_5x7/keymaps/default/config.h
+++ b/keyboards/handwired/stef9998/split_5x7/keymaps/default/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-// #define USE_SERIAL
 #define USE_I2C
 
 /* Select hand configuration */
diff --git a/keyboards/handwired/stef9998/split_5x7/keymaps/stef9998/config.h b/keyboards/handwired/stef9998/split_5x7/keymaps/stef9998/config.h
index 3b7ee90f92..d8a98f8d40 100644
--- a/keyboards/handwired/stef9998/split_5x7/keymaps/stef9998/config.h
+++ b/keyboards/handwired/stef9998/split_5x7/keymaps/stef9998/config.h
@@ -17,8 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-//#define USE_SERIAL
 #define USE_I2C
 
 /* Select hand configuration */
@@ -31,4 +29,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define TAPPING_TERM_PER_KEY
 #define IGNORE_MOD_TAP_INTERRUPT
-#define IGNORE_MOD_TAP_INTERRUPT_PER_KEY
\ No newline at end of file
+#define IGNORE_MOD_TAP_INTERRUPT_PER_KEY
diff --git a/keyboards/handwired/unk/keymaps/default/config.h b/keyboards/handwired/unk/keymaps/default/config.h
index 3d2b4c7be7..3d8851ac43 100644
--- a/keyboards/handwired/unk/keymaps/default/config.h
+++ b/keyboards/handwired/unk/keymaps/default/config.h
@@ -18,8 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/handwired/unk/rev1/config.h b/keyboards/handwired/unk/rev1/config.h
index 611b415d7a..a3e09f1aad 100644
--- a/keyboards/handwired/unk/rev1/config.h
+++ b/keyboards/handwired/unk/rev1/config.h
@@ -42,7 +42,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
  */
 
-#define USE_SERIAL
 #define SOFT_SERIAL_PIN D0
 
 /* define if matrix has ghost */
diff --git a/keyboards/handwired/xealous/config.h b/keyboards/handwired/xealous/config.h
index 2502b4d196..1d94be5a7e 100644
--- a/keyboards/handwired/xealous/config.h
+++ b/keyboards/handwired/xealous/config.h
@@ -19,7 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 #include "config_common.h"
 
-/* Use I2C or Serial, not both */
 #define USE_I2C
 #define SCL_CLOCK  800000UL