[Keyboard] add claw44 keyboard (#5511)

* add claw44 keyboard

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/readme.md

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Remove unnecessary code because of default value

* Move layer definition

* Update keyboards/claw44/keymaps/default/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/keymaps/yfuku/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/readme.md

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* default keymap. LAYOUT_kc -> LAYOUT macro

* Move rules.mk from keymaps to keyboard level.

* add Hardware Supported, Hardware Availability

* Update keyboards/claw44/keymaps/default/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/keymaps/yfuku/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Remove depreciated function

1 files changed, 91 insertions, 0 deletions

diff --git a/keyboards/claw44/rev1/split_scomm.c b/keyboards/claw44/rev1/split_scomm.c
new file mode 100644
index 0000000000..a1fe6ba5b8
--- /dev/null
+++ b/keyboards/claw44/rev1/split_scomm.c
@@ -0,0 +1,91 @@
+#ifdef USE_SERIAL
+#ifdef SERIAL_USE_MULTI_TRANSACTION
+/* --- USE flexible API (using multi-type transaction function) --- */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <split_scomm.h>
+#include "serial.h"
+#ifdef CONSOLE_ENABLE
+  #include <print.h>
+#endif
+
+uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
+uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
+uint8_t volatile status_com = 0;
+uint8_t volatile status1 = 0;
+uint8_t slave_buffer_change_count = 0;
+uint8_t s_change_old = 0xff;
+uint8_t s_change_new = 0xff;
+
+SSTD_t transactions[] = {
+#define GET_SLAVE_STATUS 0
+    /* master buffer not changed, only recive slave_buffer_change_count */
+    { (uint8_t *)&status_com,
+      0, NULL,
+      sizeof(slave_buffer_change_count), &slave_buffer_change_count,
+    },
+#define PUT_MASTER_GET_SLAVE_STATUS 1
+    /* master buffer changed need send, and recive slave_buffer_change_count  */
+    { (uint8_t *)&status_com,
+      sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
+      sizeof(slave_buffer_change_count), &slave_buffer_change_count,
+    },
+#define GET_SLAVE_BUFFER 2
+    /* recive serial_slave_buffer */
+    { (uint8_t *)&status1,
+      0, NULL,
+      sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
+    }
+};
+
+void serial_master_init(void)
+{
+    soft_serial_initiator_init(transactions, TID_LIMIT(transactions));
+}
+
+void serial_slave_init(void)
+{
+    soft_serial_target_init(transactions, TID_LIMIT(transactions));
+}
+
+// 0 => no error
+// 1 => slave did not respond
+// 2 => checksum error
+int serial_update_buffers(int master_update)
+{
+    int status, smatstatus;
+    static int need_retry = 0;
+
+    if( s_change_old != s_change_new ) {
+        smatstatus = soft_serial_transaction(GET_SLAVE_BUFFER);
+        if( smatstatus == TRANSACTION_END ) {
+            s_change_old = s_change_new;
+#ifdef CONSOLE_ENABLE
+            uprintf("slave matrix = %b %b %b %b\n",
+                    serial_slave_buffer[0], serial_slave_buffer[1],
+                    serial_slave_buffer[2], serial_slave_buffer[3]);
+#endif
+        }
+    } else {
+        // serial_slave_buffer dosen't change
+        smatstatus = TRANSACTION_END; // dummy status
+    }
+
+    if( !master_update && !need_retry) {
+        status = soft_serial_transaction(GET_SLAVE_STATUS);
+    } else {
+        status = soft_serial_transaction(PUT_MASTER_GET_SLAVE_STATUS);
+    }
+    if( status == TRANSACTION_END ) {
+        s_change_new = slave_buffer_change_count;
+        need_retry = 0;
+    } else {
+        need_retry = 1;
+    }
+    return smatstatus;
+}
+
+#endif // SERIAL_USE_MULTI_TRANSACTION
+#endif /* USE_SERIAL */