diff --git a/boards.txt b/boards.txt
index 65074d3a9f..e0efffe876 100644
--- a/boards.txt
+++ b/boards.txt
@@ -807,7 +807,7 @@ GenF0.build.board=GenF0
GenF0.build.mcu=cortex-m0
GenF0.build.series=STM32F0xx
GenF0.build.cmsis_lib_gcc=arm_cortexM0l_math
-GenF0.build.extra_flags=-D{build.product_line} {build.xSerial}
+GenF0.build.extra_flags=-D{build.product_line} {build.enable_usb} {build.xSerial}
# DEMO_F030F4 board
GenF0.menu.pnum.DEMO_F030F4=STM32F030F4 Demo board
@@ -833,6 +833,14 @@ GenF0.menu.pnum.DEMO_F030F4_HSI.build.board=DEMO_F030F4_HSI
GenF0.menu.pnum.DEMO_F030F4_HSI.build.product_line=STM32F030x6
GenF0.menu.pnum.DEMO_F030F4_HSI.build.variant=DEMO_F030F4
+# Generic_F042Cx
+GenF0.menu.pnum.Gen_F042Cx=Generic_F042C6 (internal RC oscillator)
+GenF0.menu.pnum.Gen_F042Cx.upload.maximum_data_size=6144
+GenF0.menu.pnum.Gen_F042Cx.upload.maximum_size=32768
+GenF0.menu.pnum.Gen_F042Cx.build.board=Gen_F042Cx
+GenF0.menu.pnum.Gen_F042Cx.build.product_line=STM32F042x6
+GenF0.menu.pnum.Gen_F042Cx.build.variant=Generic_F042Cx
+
# Upload menu
GenF0.menu.upload_method.swdMethod=STM32CubeProgrammer (SWD)
GenF0.menu.upload_method.swdMethod.upload.protocol=0
@@ -2359,6 +2367,20 @@ Nucleo_32.menu.xusb.HS.build.usb_speed=-DUSE_USB_HS
Nucleo_32.menu.xusb.HSFS=High Speed in Full Speed mode
Nucleo_32.menu.xusb.HSFS.build.usb_speed=-DUSE_USB_HS -DUSE_USB_HS_IN_FS
+GenF0.menu.usb.none=None
+GenF0.menu.usb.CDCgen=CDC (generic 'Serial' supersede U(S)ART)
+GenF0.menu.usb.CDCgen.build.enable_usb={build.usb_flags} -DUSBD_USE_CDC
+GenF0.menu.usb.CDC=CDC (no generic 'Serial')
+GenF0.menu.usb.CDC.build.enable_usb={build.usb_flags} -DUSBD_USE_CDC -DDISABLE_GENERIC_SERIALUSB
+GenF0.menu.usb.HID=HID (keyboard and mouse)
+GenF0.menu.usb.HID.build.enable_usb={build.usb_flags} -DUSBD_USE_HID_COMPOSITE
+GenF0.menu.xusb.FS=Low/Full Speed
+GenF0.menu.xusb.HS=High Speed
+GenF0.menu.xusb.HS.build.usb_speed=-DUSE_USB_HS
+GenF0.menu.xusb.HSFS=High Speed in Full Speed mode
+GenF0.menu.xusb.HSFS.build.usb_speed=-DUSE_USB_HS -DUSE_USB_HS_IN_FS
+
+
Disco.menu.usb.none=None
Disco.menu.usb.CDCgen=CDC (generic 'Serial' supersede U(S)ART)
Disco.menu.usb.CDCgen.build.enable_usb={build.usb_flags} -DUSBD_USE_CDC
diff --git a/variants/Generic_F042Cx/PeripheralPins.c b/variants/Generic_F042Cx/PeripheralPins.c
new file mode 100644
index 0000000000..fba190e479
--- /dev/null
+++ b/variants/Generic_F042Cx/PeripheralPins.c
@@ -0,0 +1,230 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2020, STMicroelectronics
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ *******************************************************************************
+ * Automatically generated from STM32F042C(4-6)Tx.xml
+ */
+#include "Arduino.h"
+#include "PeripheralPins.h"
+
+/* =====
+ * Note: Commented lines are alternative possibilities which are not used per default.
+ * If you change them, you will have to know what you do
+ * =====
+ */
+
+//*** ADC ***
+
+#ifdef HAL_ADC_MODULE_ENABLED
+WEAK const PinMap PinMap_ADC[] = {
+ {PA_0, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC_IN0
+ {PA_1, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC_IN1
+ {PA_2, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC_IN2
+ {PA_3, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC_IN3
+ {PA_4, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC_IN4
+ {PA_5, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC_IN5
+ {PA_6, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC_IN6
+ {PA_7, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC_IN7
+ {PB_0, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC_IN8
+ {PB_1, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC_IN9
+ {NC, NP, 0}
+};
+#endif
+
+//*** No DAC ***
+
+//*** I2C ***
+
+#ifdef HAL_I2C_MODULE_ENABLED
+WEAK const PinMap PinMap_I2C_SDA[] = {
+ {PA_10, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PA_12, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF5_I2C1)},
+ {PB_7, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_9, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_11, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_14, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF_NONE)},
+ {PF_0, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_I2C_MODULE_ENABLED
+WEAK const PinMap PinMap_I2C_SCL[] = {
+ {PA_9, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PA_11, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF5_I2C1)},
+ {PB_6, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_8, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_10, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {PB_13, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF_NONE)},
+ {PF_1, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+ {NC, NP, 0}
+};
+#endif
+
+//*** PWM ***
+
+#ifdef HAL_TIM_MODULE_ENABLED
+WEAK const PinMap PinMap_PWM[] = {
+ {PA_0, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 1, 0)}, // TIM2_CH1
+ {PA_1, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 2, 0)}, // TIM2_CH2
+ {PA_2, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 3, 0)}, // TIM2_CH3
+ {PA_3, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 4, 0)}, // TIM2_CH4
+ {PA_4, TIM14, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM14, 1, 0)}, // TIM14_CH1
+ {PA_5, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 1, 0)}, // TIM2_CH1
+ {PA_6, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 1, 0)}, // TIM3_CH1
+ {PA_6, TIM16, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM16, 1, 0)}, // TIM16_CH1
+ {PA_7, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 1, 1)}, // TIM1_CH1N
+ {PA_7, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 2, 0)}, // TIM3_CH2
+ {PA_7, TIM14, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM14, 1, 0)}, // TIM14_CH1
+ {PA_7, TIM17, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM17, 1, 0)}, // TIM17_CH1
+ {PA_8, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 1, 0)}, // TIM1_CH1
+ {PA_9, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 2, 0)}, // TIM1_CH2
+ {PA_10, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 3, 0)}, // TIM1_CH3
+ {PA_11, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 4, 0)}, // TIM1_CH4
+ {PA_15, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 1, 0)}, // TIM2_CH1
+ {PB_0, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 2, 1)}, // TIM1_CH2N
+ {PB_0, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 3, 0)}, // TIM3_CH3
+ {PB_1, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 3, 1)}, // TIM1_CH3N
+ {PB_1, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 4, 0)}, // TIM3_CH4
+ {PB_1, TIM14, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM14, 1, 0)}, // TIM14_CH1
+ {PB_3, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 2, 0)}, // TIM2_CH2
+ {PB_4, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 1, 0)}, // TIM3_CH1
+ {PB_5, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3, 2, 0)}, // TIM3_CH2
+ {PB_6, TIM16, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM16, 1, 1)}, // TIM16_CH1N
+ {PB_7, TIM17, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM17, 1, 1)}, // TIM17_CH1N
+ {PB_8, TIM16, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM16, 1, 0)}, // TIM16_CH1
+ {PB_9, TIM17, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM17, 1, 0)}, // TIM17_CH1
+ {PB_10, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 3, 0)}, // TIM2_CH3
+ {PB_11, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2, 4, 0)}, // TIM2_CH4
+ {PB_13, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 1, 1)}, // TIM1_CH1N
+ {PB_14, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 2, 1)}, // TIM1_CH2N
+ {PB_15, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1, 3, 1)}, // TIM1_CH3N
+ {NC, NP, 0}
+};
+#endif
+
+//*** SERIAL ***
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_TX[] = {
+ {PA_2, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PA_9, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
+ {PA_14, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PB_6, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART1)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_RX[] = {
+ {PA_3, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PA_10, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
+ {PA_15, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PB_7, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART1)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_RTS[] = {
+ {PA_1, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PA_12, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_CTS[] = {
+ {PA_0, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART2)},
+ {PA_11, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_USART1)},
+ {NC, NP, 0}
+};
+#endif
+
+//*** SPI ***
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_MOSI[] = {
+ {PA_7, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_5, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_15, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_MISO[] = {
+ {PA_6, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_4, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_14, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_SCLK[] = {
+ {PA_5, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_3, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_10, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PB_13, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_SSEL[] = {
+ {PA_4, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PA_15, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
+ {PB_9, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PB_12, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
+ {NC, NP, 0}
+};
+#endif
+
+//*** CAN ***
+
+#ifdef HAL_CAN_MODULE_ENABLED
+WEAK const PinMap PinMap_CAN_RD[] = {
+ {PA_11, CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF4_CAN)},
+ {PB_8, CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF4_CAN)},
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_CAN_MODULE_ENABLED
+WEAK const PinMap PinMap_CAN_TD[] = {
+ {PA_12, CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF4_CAN)},
+ {PB_9, CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF4_CAN)},
+ {NC, NP, 0}
+};
+#endif
+
+//*** No ETHERNET ***
+
+//*** No QUADSPI ***
+
+//*** USB ***
+
+#ifdef HAL_PCD_MODULE_ENABLED
+WEAK const PinMap PinMap_USB[] = {
+ //{PA_4, USB, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_USB)}, // USB_NOE
+ {PA_11, USB, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, GPIO_AF_NONE)}, // USB_DM
+ {PA_12, USB, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, GPIO_AF_NONE)}, // USB_DP
+ //{PA_13, USB, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_USB)}, // USB_NOE
+ //{PA_15, USB, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_USB)}, // USB_NOE
+ {NC, NP, 0}
+};
+#endif
+
+//*** No USB_OTG_FS ***
+
+//*** No USB_OTG_HS ***
+
+//*** No SD ***
diff --git a/variants/Generic_F042Cx/PinNamesVar.h b/variants/Generic_F042Cx/PinNamesVar.h
new file mode 100644
index 0000000000..b8cbd7b0fd
--- /dev/null
+++ b/variants/Generic_F042Cx/PinNamesVar.h
@@ -0,0 +1,33 @@
+/* SYS_WKUP */
+#ifdef PWR_WAKEUP_PIN1
+ SYS_WKUP1 = PA_0,
+#endif
+#ifdef PWR_WAKEUP_PIN2
+ SYS_WKUP2 = PC_13,
+#endif
+#ifdef PWR_WAKEUP_PIN3
+ SYS_WKUP3 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN4
+ SYS_WKUP4 = PA_2,
+#endif
+#ifdef PWR_WAKEUP_PIN5
+ SYS_WKUP5 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN6
+ SYS_WKUP6 = PB_5,
+#endif
+#ifdef PWR_WAKEUP_PIN7
+ SYS_WKUP7 = PB_15,
+#endif
+#ifdef PWR_WAKEUP_PIN8
+ SYS_WKUP8 = NC,
+#endif
+/* USB */
+#ifdef USBCON
+ // USB_NOE = PA_4,
+ USB_DM = PA_11,
+ USB_DP = PA_12,
+ // USB_NOE = PA_13,
+ // USB_NOE = PA_15,
+#endif
diff --git a/variants/Generic_F042Cx/ldscript.ld b/variants/Generic_F042Cx/ldscript.ld
new file mode 100644
index 0000000000..e55b2a308b
--- /dev/null
+++ b/variants/Generic_F042Cx/ldscript.ld
@@ -0,0 +1,200 @@
+/*
+******************************************************************************
+**
+** File : LinkerScript.ld
+**
+** Author : Auto-generated by STM32CubeIDE
+**
+** Abstract : Linker script for STM32F042C6Tx Device from STM32F0 series
+** 32Kbytes FLASH
+** 6Kbytes RAM
+**
+** Set heap size, stack size and stack location according
+** to application requirements.
+**
+** Set memory bank area and size if external memory is used.
+**
+** Target : STMicroelectronics STM32
+**
+** Distribution: The file is distributed as is without any warranty
+** of any kind.
+**
+*****************************************************************************
+** @attention
+**
+** <h2><center>© COPYRIGHT(c) 2020 STMicroelectronics</center></h2>
+**
+** Redistribution and use in source and binary forms, with or without modification,
+** are permitted provided that the following conditions are met:
+** 1. Redistributions of source code must retain the above copyright notice,
+** this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright notice,
+** this list of conditions and the following disclaimer in the documentation
+** and/or other materials provided with the distribution.
+** 3. Neither the name of STMicroelectronics nor the names of its contributors
+** may be used to endorse or promote products derived from this software
+** without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200 ; /* required amount of heap */
+_Min_Stack_Size = 0x400 ; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 6K
+ FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 32K
+}
+
+/* Sections */
+SECTIONS
+{
+ /* The startup code into "FLASH" Rom type memory */
+ .isr_vector :
+ {
+ . = ALIGN(4);
+ KEEP(*(.isr_vector)) /* Startup code */
+ . = ALIGN(4);
+ } >FLASH
+
+ /* The program code and other data into "FLASH" Rom type memory */
+ .text :
+ {
+ . = ALIGN(4);
+ *(.text) /* .text sections (code) */
+ *(.text*) /* .text* sections (code) */
+ *(.glue_7) /* glue arm to thumb code */
+ *(.glue_7t) /* glue thumb to arm code */
+ *(.eh_frame)
+
+ KEEP (*(.init))
+ KEEP (*(.fini))
+
+ . = ALIGN(4);
+ _etext = .; /* define a global symbols at end of code */
+ } >FLASH
+
+ /* Constant data into "FLASH" Rom type memory */
+ .rodata :
+ {
+ . = ALIGN(4);
+ *(.rodata) /* .rodata sections (constants, strings, etc.) */
+ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
+ . = ALIGN(4);
+ } >FLASH
+
+ .ARM.extab : {
+ . = ALIGN(4);
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+ . = ALIGN(4);
+ } >FLASH
+
+ .ARM : {
+ . = ALIGN(4);
+ __exidx_start = .;
+ *(.ARM.exidx*)
+ __exidx_end = .;
+ . = ALIGN(4);
+ } >FLASH
+
+ .preinit_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array*))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ .init_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array*))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ .fini_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(SORT(.fini_array.*)))
+ KEEP (*(.fini_array*))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ /* Used by the startup to initialize data */
+ _sidata = LOADADDR(.data);
+
+ /* Initialized data sections into "RAM" Ram type memory */
+ .data :
+ {
+ . = ALIGN(4);
+ _sdata = .; /* create a global symbol at data start */
+ *(.data) /* .data sections */
+ *(.data*) /* .data* sections */
+
+ . = ALIGN(4);
+ _edata = .; /* define a global symbol at data end */
+
+ } >RAM AT> FLASH
+
+ /* Uninitialized data section into "RAM" Ram type memory */
+ . = ALIGN(4);
+ .bss :
+ {
+ /* This is used by the startup in order to initialize the .bss section */
+ _sbss = .; /* define a global symbol at bss start */
+ __bss_start__ = _sbss;
+ *(.bss)
+ *(.bss*)
+ *(COMMON)
+
+ . = ALIGN(4);
+ _ebss = .; /* define a global symbol at bss end */
+ __bss_end__ = _ebss;
+ } >RAM
+
+ /* User_heap_stack section, used to check that there is enough "RAM" Ram type memory left */
+ ._user_heap_stack :
+ {
+ . = ALIGN(8);
+ PROVIDE ( end = . );
+ PROVIDE ( _end = . );
+ . = . + _Min_Heap_Size;
+ . = . + _Min_Stack_Size;
+ . = ALIGN(8);
+ } >RAM
+
+ /* Remove information from the compiler libraries */
+ /DISCARD/ :
+ {
+ libc.a ( * )
+ libm.a ( * )
+ libgcc.a ( * )
+ }
+
+ .ARM.attributes 0 : { *(.ARM.attributes) }
+}
diff --git a/variants/Generic_F042Cx/variant.cpp b/variants/Generic_F042Cx/variant.cpp
new file mode 100644
index 0000000000..b16cca4e89
--- /dev/null
+++ b/variants/Generic_F042Cx/variant.cpp
@@ -0,0 +1,134 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2019, STMicroelectronics
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ *******************************************************************************
+ */
+
+#include "pins_arduino.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Digital PinName array
+// This array allows to wrap Arduino pin number(Dx or x)
+// to STM32 PinName (PX_n)
+const PinName digitalPin[] = {
+ PA_0, //USART2_CTS TIM2_CH1/TIM2_ETR TSC_G1_IO1
+ PA_1, //EVENTOUT USART2_DE/USART2_RTS TIM2_CH2 TSC_G1_IO2
+ PA_2, //USART2_TX TIM2_CH3 TSC_G1_IO3
+ PA_3, //USART2_RX TIM2_CH4 TSC_G1_IO4
+ PA_4, //I2S1_WS/SPI1_NSS USART2_CK USB_NOE TSC_G2_IO1 TIM14_CH1
+ PA_5, //I2S1_CK/SPI1_SCK CEC TIM2_CH1/TIM2_ETR TSC_G2_IO2
+ PA_6, //I2S1_MCK/SPI1_MISO TIM3_CH1 TIM1_BKIN TSC_G2_IO3 TIM16_CH1
+ PA_7, //I2S1_SD/SPI1_MOSI TIM3_CH2 TIM1_CH1N TSC_G2_IO4 TIM14_CH1 TIM17_CH1
+ PA_8, //RCC_MCO USART1_CK TIM1_CH1 EVENTOUT CRS_SYNC
+ PA_9, //USART1_TX TIM1_CH2 TSC_G4_IO1 I2C1_SCL
+ PA_10, //TIM17_BKIN USART1_RX TIM1_CH3 TSC_G4_IO2 I2C1_SDA
+ PA_11, //USB_DM EVENTOUT USART1_CTS TIM1_CH4 TSC_G4_IO3 CAN_RX I2C1_SCL
+ PA_12, //USB_DP EVENTOUT USART1_DE/USART1_RTS TIM1_ETR TSC_G4_IO4 CAN_TX I2C1_SDA
+ PA_13, //SYS_SWDIO IR_OUT USB_NOE
+ PA_14, //SYS_SWCLK USART2_TX
+ PA_15, //I2S1_WS/SPI1_NSS USART2_RX TIM2_CH1/TIM2_ETR EVENTOUT USB_NOE
+ PB_0, //EVENTOUT TIM3_CH3 TIM1_CH2N TSC_G3_IO2
+ PB_1, //TIM14_CH1 TIM3_CH4 TIM1_CH3N TSC_G3_IO3
+ PB_2, //TSC_G3_IO4
+ PB_3, //I2S1_CK/SPI1_SCK EVENTOUT TIM2_CH2 TSC_G5_IO1
+ PB_4, //I2S1_MCK/SPI1_MISO TIM3_CH1 EVENTOUT TSC_G5_IO2 TIM17_BKIN
+ PB_5, //I2S1_SD/SPI1_MOSI TIM3_CH2 TIM16_BKIN I2C1_SMBA
+ PB_6, //USART1_TX I2C1_SCL TIM16_CH1N TSC_G5_IO3
+ PB_7, //USART1_RX I2C1_SDA TIM17_CH1N TSC_G5_IO4
+ PB_8, //CEC I2C1_SCL TIM16_CH1 TSC_SYNC CAN_RX
+ PB_9, //IR_OUT I2C1_SDA TIM17_CH1 EVENTOUT CAN_TX SPI2_NSS
+ PB_10, //CEC I2C1_SCL TIM2_CH3 TSC_SYNC SPI2_SCK
+ PB_11, //EVENTOUT I2C1_SDA TIM2_CH4
+ PB_12, //SPI2_NSS EVENTOUT TIM1_BKIN
+ PB_13, //SPI2_SCK TIM1_CH1N
+ PB_14, //SPI2_MISO TIM1_CH2N
+ PB_15, //SPI2_MOSI TIM1_CH3N
+ PC_13, //
+ PF_0, //I2C1_SDA CRS_SYNC I2C1_SDA
+ PF_1, //I2C1_SCL I2C1_SCL
+ PF_11 //
+};
+
+// If analog pins are not contiguous in the digitalPin array:
+// Add the analogInputPin array without defining NUM_ANALOG_FIRST
+// Analog (Ax) pin number array
+// where x is the index to retrieve the digital pin number
+const uint32_t analogInputPin[] = {
+ 0,
+ 1,
+ 2,
+ 3,
+ 4,
+ 5,
+ 6,
+ 7
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+// ----------------------------------------------------------------------------
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief System Clock Configuration
+ * @param None
+ * @retval None
+ */
+WEAK void SystemClock_Config(void)
+{
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_PeriphCLKInitTypeDef PeriphClkInit;
+ RCC_CRSInitTypeDef RCC_CRSInitStruct;
+
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
+ RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+ HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1;
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+ HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);
+
+ PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
+ PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
+ HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
+
+ __HAL_RCC_CRS_CLK_ENABLE();
+
+ RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
+ RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
+ RCC_CRSInitStruct.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
+ RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000, 1000);
+ RCC_CRSInitStruct.ErrorLimitValue = 34;
+ RCC_CRSInitStruct.HSI48CalibrationValue = 32;
+ HAL_RCCEx_CRSConfig(&RCC_CRSInitStruct);
+
+ HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);
+
+ HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+ /* SysTick_IRQn interrupt configuration */
+ HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/variants/Generic_F042Cx/variant.h b/variants/Generic_F042Cx/variant.h
new file mode 100644
index 0000000000..79387a8783
--- /dev/null
+++ b/variants/Generic_F042Cx/variant.h
@@ -0,0 +1,99 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2019, STMicroelectronics
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ *******************************************************************************
+ */
+
+#ifndef _VARIANT_ARDUINO_STM32_
+#define _VARIANT_ARDUINO_STM32_
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+/*----------------------------------------------------------------------------
+ * Pins
+ *----------------------------------------------------------------------------*/
+
+#define PA0 A0
+#define PA1 A1
+#define PA2 A2
+#define PA3 A3
+#define PA4 A4
+#define PA5 A5
+#define PA6 A6
+#define PA7 A7
+#define PA8 8
+#define PA9 9
+#define PA10 10
+#define PA11 11
+#define PA12 12
+#define PA13 13
+#define PA14 14
+#define PA15 15
+#define PB0 16
+#define PB1 17
+#define PB2 18
+#define PB3 19
+#define PB4 20
+#define PB5 21
+#define PB6 22
+#define PB7 23
+#define PB8 24
+#define PB9 25
+#define PB10 26
+#define PB11 27
+#define PB12 28
+#define PB13 29
+#define PB14 30
+#define PB15 31
+#define PC13 32
+#define PF0 33
+#define PF1 34
+#define PF11 35
+
+
+#define NUM_DIGITAL_PINS 36
+#define NUM_ANALOG_INPUTS 8
+
+// UART Definitions
+#define SERIAL_UART_INSTANCE 2
+
+#define PIN_SERIAL_RX PA3
+#define PIN_SERIAL_TX PA2
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+/*----------------------------------------------------------------------------
+ * Arduino objects - C++ only
+ *----------------------------------------------------------------------------*/
+
+#ifdef __cplusplus
+ // These serial port names are intended to allow libraries and architecture-neutral
+ // sketches to automatically default to the correct port name for a particular type
+ // of use. For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
+ // the first hardware serial port whose RX/TX pins are not dedicated to another use.
+ //
+ // SERIAL_PORT_MONITOR Port which normally prints to the Arduino Serial Monitor
+ //
+ // SERIAL_PORT_USBVIRTUAL Port which is USB virtual serial
+ //
+ // SERIAL_PORT_LINUXBRIDGE Port which connects to a Linux system via Bridge library
+ //
+ // SERIAL_PORT_HARDWARE Hardware serial port, physical RX & TX pins.
+ //
+ // SERIAL_PORT_HARDWARE_OPEN Hardware serial ports which are open for use. Their RX & TX
+ // pins are NOT connected to anything by default.
+ #define SERIAL_PORT_MONITOR Serial
+ #define SERIAL_PORT_HARDWARE Serial
+#endif
+
+#endif /* _VARIANT_ARDUINO_STM32_ */