ARM - Initial backlight support (#6487)

* Move AVR backlight to own file, add borrowed ARM implementation

* Tiny fix for backlight custom logic

* Remove duplicate board from rebase

* Fix f303 onekey example

* clang-format

* clang-format

* Remove backlight keymap debug

* Initial pass of ARM backlight docs

* Initial pass of ARM backlight docs - resolve todos

* fix rules validation logic

* Add f072 warning

* Add f072 warning

* tidy up breathing in backlight keymap

* tidy up breathing in backlight keymap

* add missing break to backlight keymap

10 files changed, 70 insertions, 5 deletions

diff --git a/keyboards/handwired/onekey/bluepill/config.h b/keyboards/handwired/onekey/bluepill/config.h
index 3d88ee00e5..81282ae1ff 100644
--- a/keyboards/handwired/onekey/bluepill/config.h
+++ b/keyboards/handwired/onekey/bluepill/config.h
@@ -21,3 +21,7 @@
 #define MATRIX_COL_PINS { B0 }
 #define MATRIX_ROW_PINS { A7 }
 #define UNUSED_PINS
+
+#define BACKLIGHT_PIN           A0
+#define BACKLIGHT_PWM_DRIVER    PWMD2
+#define BACKLIGHT_PWM_CHANNEL   1
diff --git a/keyboards/handwired/onekey/bluepill/halconf.h b/keyboards/handwired/onekey/bluepill/halconf.h
index 72879a575b..53b2f91e33 100644
--- a/keyboards/handwired/onekey/bluepill/halconf.h
+++ b/keyboards/handwired/onekey/bluepill/halconf.h
@@ -146,7 +146,7 @@
  * @brief   Enables the SPI subsystem.
  */
 #if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
-#define HAL_USE_SPI                 TRUE
+#define HAL_USE_SPI                 FALSE
 #endif
 
 /**
diff --git a/keyboards/handwired/onekey/bluepill/mcuconf.h b/keyboards/handwired/onekey/bluepill/mcuconf.h
index fced27289e..a645d3c5d5 100644
--- a/keyboards/handwired/onekey/bluepill/mcuconf.h
+++ b/keyboards/handwired/onekey/bluepill/mcuconf.h
@@ -132,8 +132,8 @@
  * PWM driver system settings.
  */
 #define STM32_PWM_USE_ADVANCED              FALSE
-#define STM32_PWM_USE_TIM1                  TRUE
-#define STM32_PWM_USE_TIM2                  FALSE
+#define STM32_PWM_USE_TIM1                  FALSE
+#define STM32_PWM_USE_TIM2                  TRUE
 #define STM32_PWM_USE_TIM3                  FALSE
 #define STM32_PWM_USE_TIM4                  FALSE
 #define STM32_PWM_USE_TIM5                  FALSE
@@ -168,7 +168,7 @@
  * SPI driver system settings.
  */
 #define STM32_SPI_USE_SPI1                  FALSE
-#define STM32_SPI_USE_SPI2                  TRUE
+#define STM32_SPI_USE_SPI2                  FALSE
 #define STM32_SPI_USE_SPI3                  FALSE
 #define STM32_SPI_SPI1_DMA_PRIORITY         1
 #define STM32_SPI_SPI2_DMA_PRIORITY         1
diff --git a/keyboards/handwired/onekey/bluepill/rules.mk b/keyboards/handwired/onekey/bluepill/rules.mk
index 46274066dd..aeda2782b9 100644
--- a/keyboards/handwired/onekey/bluepill/rules.mk
+++ b/keyboards/handwired/onekey/bluepill/rules.mk
@@ -1,7 +1,11 @@
 # GENERIC STM32F103C8T6 board - stm32duino bootloader
+BOARD = GENERIC_STM32_F103
+
 OPT_DEFS = -DCORTEX_VTOR_INIT=0x2000
 MCU_LDSCRIPT = STM32F103x8_stm32duino_bootloader
-BOARD = GENERIC_STM32_F103
+
+DFU_ARGS = -d 1eaf:0003 -a2 -R
+DFU_SUFFIX_ARGS ?= -v 1eaf -p 0003
 
 # OPT_DEFS =
 # MCU_LDSCRIPT = STM32F103x8
diff --git a/keyboards/handwired/onekey/config.h b/keyboards/handwired/onekey/config.h
index 6f7ec1289f..64a447481d 100644
--- a/keyboards/handwired/onekey/config.h
+++ b/keyboards/handwired/onekey/config.h
@@ -35,6 +35,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Set 0 if debouncing isn't needed */
 #define DEBOUNCE    5
 
+#define TAPPING_TERM 500
+
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
diff --git a/keyboards/handwired/onekey/keymaps/backlight/config.h b/keyboards/handwired/onekey/keymaps/backlight/config.h
new file mode 100644
index 0000000000..af01528b43
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/backlight/config.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define BACKLIGHT_BREATHING
diff --git a/keyboards/handwired/onekey/keymaps/backlight/keymap.c b/keyboards/handwired/onekey/keymaps/backlight/keymap.c
new file mode 100644
index 0000000000..1f4be16a62
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/backlight/keymap.c
@@ -0,0 +1,40 @@
+#include QMK_KEYBOARD_H
+
+//Tap Dance Declarations
+enum {
+  TD_BL = 0
+};
+
+void dance_cln_finished (qk_tap_dance_state_t *state, void *user_data) {
+  // noop
+}
+
+void dance_cln_reset (qk_tap_dance_state_t *state, void *user_data) {
+  switch (state->count) {
+    case 1:
+      // single tap - step through backlight
+      backlight_step();
+      break;
+#ifdef BACKLIGHT_BREATHING
+    case 2:
+      // double tap - toggle breathing
+      breathing_toggle();
+      break;
+    case 3:
+      //tripple tap - do some pulse stuff
+      breathing_pulse();
+      break;
+#endif
+    default:
+      // more - nothing
+      break;
+  }
+}
+
+qk_tap_dance_action_t tap_dance_actions[] = {
+  [TD_BL]  = ACTION_TAP_DANCE_FN_ADVANCED (NULL, dance_cln_finished, dance_cln_reset)
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  LAYOUT( TD(TD_BL) )
+};
diff --git a/keyboards/handwired/onekey/keymaps/backlight/rules.mk b/keyboards/handwired/onekey/keymaps/backlight/rules.mk
new file mode 100644
index 0000000000..176e099770
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/backlight/rules.mk
@@ -0,0 +1,2 @@
+BACKLIGHT_ENABLE = yes
+TAP_DANCE_ENABLE = yes
diff --git a/keyboards/handwired/onekey/proton_c/config.h b/keyboards/handwired/onekey/proton_c/config.h
index f6bedcfe64..d4fb9c8299 100644
--- a/keyboards/handwired/onekey/proton_c/config.h
+++ b/keyboards/handwired/onekey/proton_c/config.h
@@ -21,3 +21,8 @@
 #define MATRIX_COL_PINS { A3 }
 #define MATRIX_ROW_PINS { A2 }
 #define UNUSED_PINS
+
+#define BACKLIGHT_PIN           B8
+#define BACKLIGHT_PWM_DRIVER    PWMD4
+#define BACKLIGHT_PWM_CHANNEL   3
+#define BACKLIGHT_PAL_MODE      2
diff --git a/keyboards/handwired/onekey/stm32f0_disco/config.h b/keyboards/handwired/onekey/stm32f0_disco/config.h
index 039a1beffd..4024ee1caa 100644
--- a/keyboards/handwired/onekey/stm32f0_disco/config.h
+++ b/keyboards/handwired/onekey/stm32f0_disco/config.h
@@ -21,3 +21,8 @@
 #define MATRIX_COL_PINS { B4 }
 #define MATRIX_ROW_PINS { B5 }
 #define UNUSED_PINS
+
+#define BACKLIGHT_PIN           C8
+#define BACKLIGHT_PWM_DRIVER    PWMD3
+#define BACKLIGHT_PWM_CHANNEL   3
+#define BACKLIGHT_PAL_MODE      0