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+/* Copyright 2022 customMK
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#pragma once
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+
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+#include "config_common.h"
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+
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+// This file includes example #defines to enable commonly-used functionality
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+// (SPI, PWM backlight, etc.) on specific pins. Capabilities you want to include
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+// should be added to the config.h for your keyboard. Not all capabilities are
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+// shown; for example:
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+// I2C is not shown because the QMK defaults are sufficient for SCL on B6 and SDA on B7
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+// Serial communications (for split keyboards) is not shown because QMK defaults work
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+// for either pins A15 or B6
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+
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+// If you need to change pins for PWM, SPI, I2C, or Serial communications, be aware that
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+// doing this may require changing the driver, channel, PAL (Pin ALternate function) mode,
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+// DMA stream, and/or DMA channel.
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+
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+
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+// Bonsai C4 wires up pin A9 for Vbus sensing pin by default. For spilt keyboards, this
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+// can be used to determine which half of the keyboard is plugged into USB.
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+// For boards using Bonsai C4 merely as a reference design, the VBUS sense pin A9
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+// can be used for purposes other than Vbus sensing (e.g. the switch
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+// matrix).
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+//
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+// If A9 is needed for Vbus sensing, uncomment the line
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+// below. Most keyboards using Bonsai C4 can leave the line below
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+// commented out.
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+//
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+// #undef BOARD_OTG_NOVBUSSENS
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+
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+// FRAM configuration
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+#define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN A0
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+#define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8 // 96MHz / 8 = 12MHz; max supported by MB85R64 is 20MHz
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+#define EXTERNAL_EEPROM_PAGE_SIZE 64 // does not matter for FRAM, just sets the RAM buffer size in STM32F chip
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+#define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 8191
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+
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+// External flash configuration
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+#define EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN B12
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+#define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 1 // 96MHz; max supported by W25Q128JV is 133MHz
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+#define EXTERNAL_FLASH_BYTE_COUNT (16 * 1024 * 1024) //128Mbit or 16MByte
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+#define EXTERNAL_FLASH_PAGE_SIZE 256
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+#define EXTERNAL_FLASH_SPI_TIMEOUT 200000 //datasheet max is 200 seconds for flash chip erase
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+
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+// SPI Configuration (needed for FRAM and FLASH)
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+#define SPI_DRIVER SPID1
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+#define SPI_SCK_PIN B3
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+#define SPI_MOSI_PIN B5
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+#define SPI_MISO_PIN B4
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+
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+// Example code to set up PWM backlight on pin A6
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+// If a different pin is used, a different PWM driver/channel settings may be necessary
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+#define BACKLIGHT_PIN A6
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+#define BACKLIGHT_PWM_DRIVER PWMD3
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+#define BACKLIGHT_PWM_CHANNEL 1
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+
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+// Example code for WS2812 underglow
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+// Only pin A10 is wired to send 5V signals to the WS2812
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+// This also usually requires adding special wiring during board assembly
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+#define RGB_DI_PIN A10
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+#define WS2812_PWM_DRIVER PWMD1
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+#define WS2812_PWM_CHANNEL 3
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+#define WS2812_PWM_PAL_MODE 1
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+#define WS2812_DMA_STREAM STM32_DMA2_STREAM5
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+#define WS2812_DMA_CHANNEL 6
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David Hoelscher