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diff --git a/platforms/chibios/boards/BONSAI_C4/configs/config.h b/platforms/chibios/boards/BONSAI_C4/configs/config.h
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+++ b/platforms/chibios/boards/BONSAI_C4/configs/config.h
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+/* Copyright 2022 David Hoelscher, customMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+// Bonsai C4 includes Vbus sensing; derived designs that use PA9 for other purposes
+// may disable Vbus sensing with #define BOARD_OTG_NOVBUSSENS 1
+
+#ifndef EARLY_INIT_PERFORM_BOOTLOADER_JUMP
+# define EARLY_INIT_PERFORM_BOOTLOADER_JUMP TRUE
+#endif
+
+// FRAM configuration
+#ifndef EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN
+# define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN PAL_LINE(GPIOA, 0)
+# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8 // 96MHz / 8 = 12MHz; max supported by MB85R64 is 20MHz
+# define EXTERNAL_EEPROM_BYTE_COUNT 8192
+# define EXTERNAL_EEPROM_PAGE_SIZE 64 // does not matter for FRAM, just sets the RAM buffer size in STM32F chip
+# define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 8191
+#endif
+
+// External flash configuration
+#ifndef EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN
+# define EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN PAL_LINE(GPIOB, 12)
+# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 2 // 48MHz; max supported by W25Q128JV is 133MHz
+# define EXTERNAL_FLASH_BYTE_COUNT (16 * 1024 * 1024) //128Mbit or 16MByte
+# define EXTERNAL_FLASH_PAGE_SIZE 256
+# define EXTERNAL_FLASH_SPI_TIMEOUT 200000 //datasheet max is 200 seconds for flash chip erase
+#endif
+
+// SPI Configuration (needed for FRAM and FLASH)
+#ifndef SPI_DRIVER
+# define SPI_DRIVER SPID1
+#endif
+#ifndef SPI_SCK_PIN
+# define SPI_SCK_PIN PAL_LINE(GPIOB, 3)
+#endif
+#ifndef SPI_MOSI_PIN
+# define SPI_MOSI_PIN PAL_LINE(GPIOB, 5)
+#endif
+#ifndef SPI_MISO_PIN
+# define SPI_MISO_PIN PAL_LINE(GPIOB, 4)
+#endif
+
+
+// I2C Configuration
+#ifdef CONVERT_TO_BONSAI_C4
+# ifndef I2C1_SCL_PIN
+# define I2C1_SCL_PIN PAL_LINE(GPIOB, 6)
+# endif
+# ifndef I2C1_SDA_PIN
+# define I2C1_SDA_PIN PAL_LINE(GPIOB, 9)
+# endif
+#endif
+
+// WS2812-style LED control on pin A10
+#ifdef WS2812_DRIVER_PWM
+# ifndef RGB_DI_PIN
+# define RGB_DI_PIN PAL_LINE(GPIOA, 10)
+# endif
+# ifndef WS2812_PWM_DRIVER
+# define WS2812_PWM_DRIVER PWMD1
+# endif
+# ifndef WS2812_PWM_CHANNEL
+# define WS2812_PWM_CHANNEL 3
+# endif
+# ifndef WS2812_PWM_PAL_MODE
+# define WS2812_PWM_PAL_MODE 1
+# endif
+# ifndef WS2812_DMA_STREAM
+# define WS2812_DMA_STREAM STM32_DMA2_STREAM5
+# endif
+# ifndef WS2812_DMA_CHANNEL
+# define WS2812_DMA_CHANNEL 6
+# endif
+#endif
+
+#ifndef USB_VBUS_PIN
+# define USB_VBUS_PIN PAL_LINE(GPIOA, 9)
+#endif \ No newline at end of file