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diff --git a/lib/chibios/os/hal/boards/MAPLEMINI_STM32_F103/board.h b/lib/chibios/os/hal/boards/MAPLEMINI_STM32_F103/board.h
new file mode 100644
index 000000000..ca9a860b2
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+++ b/lib/chibios/os/hal/boards/MAPLEMINI_STM32_F103/board.h
@@ -0,0 +1,193 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+/*
+ * Setup for the LeafLabs Maple Mini.
+ */
+
+/*
+ * Board identifier.
+ */
+#define BOARD_MAPLEMINI_STM32_F103
+#define BOARD_NAME              "LeafLabs Maple Mini"
+
+/*
+ * Board frequencies.
+ */
+#define STM32_LSECLK            32768
+#define STM32_HSECLK            8000000
+
+/*
+ * MCU type, supported types are defined in ./os/hal/platforms/hal_lld.h.
+ */
+#define STM32F103xB
+
+/*
+ * IO pins assignments
+ *
+ * numbering is sorted by onboard/connectors, as from the schematics in
+ * https://github.com/leaflabs/maplemini
+ */
+
+/* on-board */
+
+#define GPIOB_LED               1
+#define GPIOB_USB_DISC          9
+#define GPIOD_OSC_IN            0
+#define GPIOD_OSC_OUT           1
+
+/* J1 connector */
+
+// pin 1:       AV+
+// pin 2:       AV-
+// pin 3:       VBAT
+#define GPIOC_TAMPER_RTC        13      // pin 4
+#define GPIOC_OSC32_IN          14      // pin 5
+#define GPIOC_OSD32_OUT         15      // pin 6
+// pin 7:       RESET
+#define GPIOA_USART2_CTS        0       // pin 8
+#define GPIOA_USART2_RTS        1       // pin 9
+#define GPIOA_USART2_TX         2       // pin 10
+#define GPIOA_USART2_RX         3       // pin 11
+#define GPIOA_SPI1_NSS          4       // pin 12
+#define GPIOA_SPI1_SCK          5       // pin 13
+#define GPIOA_SPI1_MISO         6       // pin 14
+#define GPIOA_SPI1_MOSI         7       // pin 15
+#define GPIOB_ADC12_IN8         0       // pin 16
+#define GPIOB_BOOT1             2       // pin 17
+#define GPIOB_I2C2_SCL          10      // pin 18
+#define GPIOB_I2C2_SDA          11      // pin 19
+// pin 20: VIN
+
+/* J2 connector */
+
+#define GPIOB_SPI2_NSS          12      // pin 1
+#define GPIOB_SPI2_SCK          13      // pin 2
+#define GPIOB_SPI2_MISO         14      // pin 3
+#define GPIOB_SPI2_MOSI         15      // pin 4
+#define GPIOA_USART1_CK         8       // pin 5
+#define GPIOA_USART1_TX         9       // pin 6
+#define GPIOA_USART1_RX         10      // pin 7
+#define GPIOA_USBDM             11      // pin 8
+#define GPIOA_USBDP             12      // pin 9
+#define GPIOA_JTMS              13      // pin 10
+#define GPIOA_JTCK              14      // pin 11
+#define GPIOA_JTDI              15      // pin 12
+#define GPIOB_JTDO              3       // pin 13
+#define GPIOB_JTRST             4       // pin 14
+#define GPIOB_I2C1_SMBA         5       // pin 15
+#define GPIOB_I2C1_SCL          6       // pin 16
+#define GPIOB_I2C1_SDA          7       // pin 17
+#define GPIOB_BOOT0_BUTTON      8       // pin 18
+// pin 19: GND
+// pin 20: VCC
+
+/*
+ * I/O ports initial setup, this configuration is established soon after reset
+ * in the initialization code.
+ *
+ * The digits have the following meaning:
+ *   0 - Analog input.
+ *   1 - Push Pull output 10MHz.
+ *   2 - Push Pull output 2MHz.
+ *   3 - Push Pull output 50MHz.
+ *   4 - Digital input.
+ *   5 - Open Drain output 10MHz.
+ *   6 - Open Drain output 2MHz.
+ *   7 - Open Drain output 50MHz.
+ *   8 - Digital input with PullUp or PullDown resistor depending on ODR.
+ *   9 - Alternate Push Pull output 10MHz.
+ *   A - Alternate Push Pull output 2MHz.
+ *   B - Alternate Push Pull output 50MHz.
+ *   C - Reserved.
+ *   D - Alternate Open Drain output 10MHz.
+ *   E - Alternate Open Drain output 2MHz.
+ *   F - Alternate Open Drain output 50MHz.
+ * Please refer to the STM32 Reference Manual for details.
+ */
+
+/*
+ * Port A setup.
+ * Everything input with pull-up except:
+ * PA2  - Alternate output  (USART2 TX).
+ * PA3  - Normal input      (USART2 RX).
+ * PA9  - Alternate output  (USART1 TX).
+ * PA10 - Normal input      (USART1 RX).
+ */
+#define VAL_GPIOACRL            0x88884B88      /*  PA7...PA0 */
+#define VAL_GPIOACRH            0x888884B8      /* PA15...PA8 */
+#define VAL_GPIOAODR            0xFFFFFFFF
+
+/*
+ * Port B setup.
+ * Everything input with pull-up except:
+ * PB1    - Push Pull output  (LED).
+ * PB9    - Push Pull output  (USB switch).
+ */
+#define VAL_GPIOBCRL            0x88888838      /*  PB7...PB0 */
+#define VAL_GPIOBCRH            0x88888838      /* PB15...PB8 */
+#define VAL_GPIOBODR            0xFFFFFFFF
+
+/*
+ * Port C setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOCCRL            0x88888888      /*  PC7...PC0 */
+#define VAL_GPIOCCRH            0x88888888      /* PC15...PC8 */
+#define VAL_GPIOCODR            0xFFFFFFFF
+
+/*
+ * Port D setup.
+ * Everything input with pull-up except:
+ * PD0  - Normal input (XTAL).
+ * PD1  - Normal input (XTAL).
+ */
+#define VAL_GPIODCRL            0x88888844      /*  PD7...PD0 */
+#define VAL_GPIODCRH            0x88888888      /* PD15...PD8 */
+#define VAL_GPIODODR            0xFFFFFFFF
+
+/*
+ * Port E setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOECRL            0x88888888      /*  PE7...PE0 */
+#define VAL_GPIOECRH            0x88888888      /* PE15...PE8 */
+#define VAL_GPIOEODR            0xFFFFFFFF
+
+/*
+ * USB bus activation macro, required by the USB driver.
+ */
+#define usb_lld_connect_bus(usbp) palClearPad(GPIOB, GPIOB_USB_DISC)
+
+/*
+ * USB bus de-activation macro, required by the USB driver.
+ */
+#define usb_lld_disconnect_bus(usbp) palSetPad(GPIOB, GPIOB_USB_DISC)
+
+#if !defined(_FROM_ASM_)
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void boardInit(void);
+#ifdef __cplusplus
+}
+#endif
+#endif /* _FROM_ASM_ */
+
+#endif /* _BOARD_H_ */