diff --git a/bootloader.mk b/bootloader.mk
index fd76446e99e..ead52cbe3d4 100644
--- a/bootloader.mk
+++ b/bootloader.mk
@@ -137,3 +137,6 @@ ifeq ($(strip $(BOOTLOADER)), stm32duino)
DFU_ARGS = -d 1EAF:0003 -a 2 -R
DFU_SUFFIX_ARGS = -v 1EAF -p 0003
endif
+ifeq ($(strip $(BOOTLOADER)), tinyuf2)
+ OPT_DEFS += -DBOOTLOADER_TINYUF2
+endif
diff --git a/data/schemas/keyboard.jsonschema b/data/schemas/keyboard.jsonschema
index 3034242fd9d..276f66413e2 100644
--- a/data/schemas/keyboard.jsonschema
+++ b/data/schemas/keyboard.jsonschema
@@ -34,7 +34,7 @@
},
"bootloader": {
"type": "string",
- "enum": ["atmel-dfu", "bootloadHID", "caterina", "halfkay", "kiibohd", "lufa-dfu", "lufa-ms", "micronucleus", "qmk-dfu", "stm32-dfu", "stm32duino", "unknown", "USBasp"]
+ "enum": ["atmel-dfu", "bootloadHID", "caterina", "halfkay", "kiibohd", "lufa-dfu", "lufa-ms", "micronucleus", "qmk-dfu", "stm32-dfu", "stm32duino", "unknown", "USBasp", "tinyuf2"]
},
"diode_direction": {
"type": "string",
diff --git a/docs/flashing.md b/docs/flashing.md
index 7804a6bad8d..83c97444e10 100644
--- a/docs/flashing.md
+++ b/docs/flashing.md
@@ -249,3 +249,29 @@ Flashing sequence:
2. Wait for the OS to detect the device
3. Flash a .bin file
4. Reset the device into application mode (may be done automatically)
+
+## tinyuf2
+
+Keyboards may opt into supporting the tinyuf2 bootloader. This is currently only supported on the F411 blackpill.
+
+The `rules.mk` setting for this bootloader is `tinyuf2`, and can be specified at the keymap or user level.
+
+To ensure compatibility with the tinyuf2 bootloader, make sure this block is present in your `rules.mk`:
+
+```make
+# Bootloader selection
+BOOTLOADER = tinyuf2
+```
+
+Compatible flashers:
+
+* Any application able to copy a file from one place to another, such as _macOS Finder_ or _Windows Explorer_.
+
+Flashing sequence:
+
+1. Enter the bootloader using any of the following methods:
+ * Tap the `RESET` keycode
+ * Double-tap the `nRST` button on the PCB.
+2. Wait for the OS to detect the device
+3. Copy the .uf2 file to the new USB disk
+4. Wait for the keyboard to become available
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/chconf.h b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/chconf.h
new file mode 100644
index 00000000000..3d9a3936388
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/chconf.h
@@ -0,0 +1,21 @@
+/* Copyright 2021 QMK
+ *
+ * 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 2 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 .
+ */
+
+#pragma once
+
+#define CH_CFG_ST_FREQUENCY 10000
+
+#include_next
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/config.h b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/config.h
new file mode 100755
index 00000000000..95e99aacc15
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/config.h
@@ -0,0 +1,31 @@
+/* Copyright 2021 QMK
+ *
+ * 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 2 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 .
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+#define MATRIX_COL_PINS { B0 }
+#define MATRIX_ROW_PINS { A7 }
+#define UNUSED_PINS
+
+#define BACKLIGHT_PIN A0
+#define BACKLIGHT_PWM_DRIVER PWMD5
+#define BACKLIGHT_PWM_CHANNEL 1
+
+#define RGB_DI_PIN A1
+
+#define ADC_PIN A0
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/halconf.h b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/halconf.h
new file mode 100644
index 00000000000..e15870984f3
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/halconf.h
@@ -0,0 +1,22 @@
+/* Copyright 2021 QMK
+ *
+ * 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 2 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 .
+ */
+
+#pragma once
+
+#define HAL_USE_I2C TRUE
+#define HAL_USE_PWM TRUE
+
+#include_next
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/mcuconf.h b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/mcuconf.h
new file mode 100755
index 00000000000..ad8aecdb109
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/mcuconf.h
@@ -0,0 +1,24 @@
+/* Copyright 2021 QMK
+ *
+ * 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 .
+ */
+#pragma once
+
+#include_next "mcuconf.h"
+
+#undef STM32_I2C_USE_I2C1
+#define STM32_I2C_USE_I2C1 TRUE
+
+#undef STM32_PWM_USE_TIM5
+#define STM32_PWM_USE_TIM5 TRUE
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/readme.md b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/readme.md
new file mode 100755
index 00000000000..ff43658f4cf
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/readme.md
@@ -0,0 +1,9 @@
+# f411 blackpill onekey
+
+Supported Hardware: *STM32F411CEU6 WeAct v1.3*.
+
+To trigger keypress, short together pins *B0* and *A7*.
+
+This variant requires the TinyUF2 bootloader to be installed. This can be downloaded from the [tinyuf2 releases page](https://github.com/adafruit/tinyuf2/releases). The F401 blackpill binary works for both F401- and F411-based blackpill devices.
+
+Double-tap reset to enter bootloader mode. Copy the built uf2 file to the device by dragging the file to the new USB disk.
\ No newline at end of file
diff --git a/keyboards/handwired/onekey/blackpill_f411_tinyuf2/rules.mk b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/rules.mk
new file mode 100755
index 00000000000..ec38577b2b0
--- /dev/null
+++ b/keyboards/handwired/onekey/blackpill_f411_tinyuf2/rules.mk
@@ -0,0 +1,10 @@
+# MCU name
+MCU = STM32F411
+
+# Build Options
+# change yes to no to disable
+#
+KEYBOARD_SHARED_EP = yes
+
+# We want to use the tinyuf2 bootloader...
+BOOTLOADER = tinyuf2
\ No newline at end of file
diff --git a/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xC_tinyuf2.ld b/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xC_tinyuf2.ld
new file mode 100644
index 00000000000..82253d3de5d
--- /dev/null
+++ b/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xC_tinyuf2.ld
@@ -0,0 +1,89 @@
+/*
+ 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.
+*/
+
+/*
+ * STM32F411xC memory setup.
+ */
+MEMORY
+{
+ flash0 (rx) : org = 0x08000000 + 64k, len = 256k - 64k /* tinyuf2 bootloader requires app to be located at 64k offset for this MCU */
+ flash1 (rx) : org = 0x00000000, len = 0
+ flash2 (rx) : org = 0x00000000, len = 0
+ flash3 (rx) : org = 0x00000000, len = 0
+ flash4 (rx) : org = 0x00000000, len = 0
+ flash5 (rx) : org = 0x00000000, len = 0
+ flash6 (rx) : org = 0x00000000, len = 0
+ flash7 (rx) : org = 0x00000000, len = 0
+ ram0 (wx) : org = 0x20000000, len = 128k
+ ram1 (wx) : org = 0x00000000, len = 0
+ ram2 (wx) : org = 0x00000000, len = 0
+ ram3 (wx) : org = 0x00000000, len = 0
+ ram4 (wx) : org = 0x00000000, len = 0
+ ram5 (wx) : org = 0x00000000, len = 0
+ ram6 (wx) : org = 0x00000000, len = 0
+ ram7 (wx) : org = 0x00000000, len = 0
+}
+
+/* For each data/text section two region are defined, a virtual region
+ and a load region (_LMA suffix).*/
+
+/* Flash region to be used for exception vectors.*/
+REGION_ALIAS("VECTORS_FLASH", flash0);
+REGION_ALIAS("VECTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for constructors and destructors.*/
+REGION_ALIAS("XTORS_FLASH", flash0);
+REGION_ALIAS("XTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for code text.*/
+REGION_ALIAS("TEXT_FLASH", flash0);
+REGION_ALIAS("TEXT_FLASH_LMA", flash0);
+
+/* Flash region to be used for read only data.*/
+REGION_ALIAS("RODATA_FLASH", flash0);
+REGION_ALIAS("RODATA_FLASH_LMA", flash0);
+
+/* Flash region to be used for various.*/
+REGION_ALIAS("VARIOUS_FLASH", flash0);
+REGION_ALIAS("VARIOUS_FLASH_LMA", flash0);
+
+/* Flash region to be used for RAM(n) initialization data.*/
+REGION_ALIAS("RAM_INIT_FLASH_LMA", flash0);
+
+/* RAM region to be used for Main stack. This stack accommodates the processing
+ of all exceptions and interrupts.*/
+REGION_ALIAS("MAIN_STACK_RAM", ram0);
+
+/* RAM region to be used for the process stack. This is the stack used by
+ the main() function.*/
+REGION_ALIAS("PROCESS_STACK_RAM", ram0);
+
+/* RAM region to be used for data segment.*/
+REGION_ALIAS("DATA_RAM", ram0);
+REGION_ALIAS("DATA_RAM_LMA", flash0);
+
+/* RAM region to be used for BSS segment.*/
+REGION_ALIAS("BSS_RAM", ram0);
+
+/* RAM region to be used for the default heap.*/
+REGION_ALIAS("HEAP_RAM", ram0);
+
+/* Generic rules inclusion.*/
+INCLUDE rules.ld
+
+/* TinyUF2 bootloader reset support */
+_board_dfu_dbl_tap = ORIGIN(ram0) + 64k - 4; /* this is based off the linker file for tinyuf2 */
+
diff --git a/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xE_tinyuf2.ld b/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xE_tinyuf2.ld
new file mode 100644
index 00000000000..1656c67bf75
--- /dev/null
+++ b/platforms/chibios/BLACKPILL_STM32_F411/ld/STM32F411xE_tinyuf2.ld
@@ -0,0 +1,89 @@
+/*
+ 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.
+*/
+
+/*
+ * STM32F411xE memory setup.
+ */
+MEMORY
+{
+ flash0 (rx) : org = 0x08000000 + 64k, len = 512k - 64k /* tinyuf2 bootloader requires app to be located at 64k offset for this MCU */
+ flash1 (rx) : org = 0x00000000, len = 0
+ flash2 (rx) : org = 0x00000000, len = 0
+ flash3 (rx) : org = 0x00000000, len = 0
+ flash4 (rx) : org = 0x00000000, len = 0
+ flash5 (rx) : org = 0x00000000, len = 0
+ flash6 (rx) : org = 0x00000000, len = 0
+ flash7 (rx) : org = 0x00000000, len = 0
+ ram0 (wx) : org = 0x20000000, len = 128k
+ ram1 (wx) : org = 0x00000000, len = 0
+ ram2 (wx) : org = 0x00000000, len = 0
+ ram3 (wx) : org = 0x00000000, len = 0
+ ram4 (wx) : org = 0x00000000, len = 0
+ ram5 (wx) : org = 0x00000000, len = 0
+ ram6 (wx) : org = 0x00000000, len = 0
+ ram7 (wx) : org = 0x00000000, len = 0
+}
+
+/* For each data/text section two region are defined, a virtual region
+ and a load region (_LMA suffix).*/
+
+/* Flash region to be used for exception vectors.*/
+REGION_ALIAS("VECTORS_FLASH", flash0);
+REGION_ALIAS("VECTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for constructors and destructors.*/
+REGION_ALIAS("XTORS_FLASH", flash0);
+REGION_ALIAS("XTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for code text.*/
+REGION_ALIAS("TEXT_FLASH", flash0);
+REGION_ALIAS("TEXT_FLASH_LMA", flash0);
+
+/* Flash region to be used for read only data.*/
+REGION_ALIAS("RODATA_FLASH", flash0);
+REGION_ALIAS("RODATA_FLASH_LMA", flash0);
+
+/* Flash region to be used for various.*/
+REGION_ALIAS("VARIOUS_FLASH", flash0);
+REGION_ALIAS("VARIOUS_FLASH_LMA", flash0);
+
+/* Flash region to be used for RAM(n) initialization data.*/
+REGION_ALIAS("RAM_INIT_FLASH_LMA", flash0);
+
+/* RAM region to be used for Main stack. This stack accommodates the processing
+ of all exceptions and interrupts.*/
+REGION_ALIAS("MAIN_STACK_RAM", ram0);
+
+/* RAM region to be used for the process stack. This is the stack used by
+ the main() function.*/
+REGION_ALIAS("PROCESS_STACK_RAM", ram0);
+
+/* RAM region to be used for data segment.*/
+REGION_ALIAS("DATA_RAM", ram0);
+REGION_ALIAS("DATA_RAM_LMA", flash0);
+
+/* RAM region to be used for BSS segment.*/
+REGION_ALIAS("BSS_RAM", ram0);
+
+/* RAM region to be used for the default heap.*/
+REGION_ALIAS("HEAP_RAM", ram0);
+
+/* Generic rules inclusion.*/
+INCLUDE rules.ld
+
+/* TinyUF2 bootloader reset support */
+_board_dfu_dbl_tap = ORIGIN(ram0) + 64k - 4; /* this is based off the linker file for tinyuf2 */
+
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index 2e4d2500897..437d354fbe3 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -304,7 +304,12 @@ ifneq ($(findstring STM32F411, $(MCU)),)
# Linker script to use
# - it should exist either in /os/common/ports/ARMCMx/compilers/GCC/ld/
# or /ld/
- MCU_LDSCRIPT ?= STM32F411xE
+ ifeq ($(strip $(BOOTLOADER)), tinyuf2)
+ MCU_LDSCRIPT ?= STM32F411xE_tinyuf2
+ FIRMWARE_FORMAT ?= uf2
+ else
+ MCU_LDSCRIPT ?= STM32F411xE
+ endif
# Startup code to use
# - it should exist in /os/common/startup/ARMCMx/compilers/GCC/mk/
diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index 40595a1e3b2..cdf9ba6495c 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -190,6 +190,8 @@ else ifneq ("$(wildcard $(KEYBOARD_PATH_2)/ld/$(MCU_LDSCRIPT).ld)","")
LDSCRIPT = $(KEYBOARD_PATH_2)/ld/$(MCU_LDSCRIPT).ld
else ifneq ("$(wildcard $(KEYBOARD_PATH_1)/ld/$(MCU_LDSCRIPT).ld)","")
LDSCRIPT = $(KEYBOARD_PATH_1)/ld/$(MCU_LDSCRIPT).ld
+else ifneq ("$(wildcard $(TOP_DIR)/platforms/chibios/$(BOARD)/ld/$(MCU_LDSCRIPT).ld)","")
+ LDSCRIPT = $(TOP_DIR)/platforms/chibios/$(BOARD)/ld/$(MCU_LDSCRIPT).ld
else ifneq ("$(wildcard $(TOP_DIR)/platforms/chibios/common/ld/$(MCU_LDSCRIPT).ld)","")
LDSCRIPT = $(TOP_DIR)/platforms/chibios/common/ld/$(MCU_LDSCRIPT).ld
else ifneq ("$(wildcard $(STARTUPLD_CONTRIB)/$(MCU_LDSCRIPT).ld)","")
diff --git a/tmk_core/common/chibios/bootloader.c b/tmk_core/common/chibios/bootloader.c
index 4a175a62834..f91ac7d9ebe 100644
--- a/tmk_core/common/chibios/bootloader.c
+++ b/tmk_core/common/chibios/bootloader.c
@@ -13,7 +13,22 @@
# define STM32_BOOTLOADER_DUAL_BANK FALSE
#endif
-#if STM32_BOOTLOADER_DUAL_BANK
+#ifdef BOOTLOADER_TINYUF2
+
+# define DBL_TAP_MAGIC 0xf01669ef // From tinyuf2's board_api.h
+
+// defined by linker script
+extern uint32_t _board_dfu_dbl_tap[];
+# define DBL_TAP_REG _board_dfu_dbl_tap[0]
+
+void bootloader_jump(void) {
+ DBL_TAP_REG = DBL_TAP_MAGIC;
+ NVIC_SystemReset();
+}
+
+void enter_bootloader_mode_if_requested(void) { /* not needed, no two-stage reset */ }
+
+#elif STM32_BOOTLOADER_DUAL_BANK
// Need pin definitions
# include "config_common.h"