[Keyboard] Add ErgoStrafer keyboard (#21195)

keyboards/custommk/ergostrafer/config.h

@@ -0,0 +1,26 @@
+// Copyright 2023 customMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// FRAM configuration
+#define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN B7
+#define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 4 // 48MHz / 4 = 12MHz; max supported by MB85R64 is 20MHz
+
+// SPI configuration
+#define SPI_DRIVER SPID1
+#define SPI_SCK_PIN B3
+#define SPI_SCK_PAL_MODE 5
+#define SPI_MOSI_PIN B5
+#define SPI_MOSI_PAL_MODE 5
+#define SPI_MISO_PIN B4
+#define SPI_MISO_PAL_MODE 5
+
+#define TAP_CODE_DELAY 10
+
+// Audio configuration
+#define AUDIO_PIN B8
+#define AUDIO_PWM_DRIVER PWMD4
+#define AUDIO_PWM_CHANNEL 3 
+#define AUDIO_PWM_PAL_MODE 2
+#define AUDIO_STATE_TIMER GPTD5