[Keyboard] frobiac custom boards and layout (#19883)

keyboards/frobiac/blackbowl/blackbowl.h

@@ -0,0 +1,32 @@
+// Copyright 2023 @frobiac
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "quantum.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+extern uint8_t expander_status;
+extern uint8_t expander_input_pin_mask;
+extern bool    i2c_initialized;
+
+void init_blackbowl(void);
+void init_expander(void);
+
+// clang-format off
+#define I2C_TIMEOUT     100
+#define IODIRA          0x00            // i/o direction register
+#define IODIRB          0x01
+#define GPPUA           0x0C            // GPIO pull-up resistor register
+#define GPPUB           0x0D
+#define GPIOA           0x12            // general purpose i/o port register (write modifies OLAT)
+#define GPIOB           0x13
+#define OLATA           0x14            // output latch register
+#define OLATB           0x15
+
+#define xxx KC_NO
+
+// clang-format on