Relocate backlight drivers (#21444)

builddefs/common_features.mk

@@ -565,18 +565,18 @@ ifeq ($(strip $(BACKLIGHT_ENABLE)), yes)
     endif
 
     COMMON_VPATH += $(QUANTUM_DIR)/backlight
+    COMMON_VPATH += $(DRIVER_PATH)/backlight
     SRC += $(QUANTUM_DIR)/backlight/backlight.c
     SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
     OPT_DEFS += -DBACKLIGHT_ENABLE
 
-    ifeq ($(strip $(BACKLIGHT_DRIVER)), custom)
-        OPT_DEFS += -DBACKLIGHT_CUSTOM_DRIVER
-    else
+    ifneq ($(strip $(BACKLIGHT_DRIVER)), custom)
         SRC += $(QUANTUM_DIR)/backlight/backlight_driver_common.c
-        ifeq ($(strip $(BACKLIGHT_DRIVER)), pwm)
-            SRC += $(QUANTUM_DIR)/backlight/backlight_$(PLATFORM_KEY).c
+
+        ifeq ($(strip $(BACKLIGHT_DRIVER)), software)
+            SRC += $(DRIVER_PATH)/backlight/backlight_software.c
         else
-            SRC += $(QUANTUM_DIR)/backlight/backlight_$(strip $(BACKLIGHT_DRIVER)).c
+            SRC += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/backlight_$(strip $(BACKLIGHT_DRIVER)).c
         endif
     endif
 endif

drivers/backlight/backlight_software.c

@@ -1,6 +1,6 @@
-#include "quantum.h"
 #include "backlight.h"
 #include "backlight_driver_common.h"
+#include "util.h"
 
 #ifdef BACKLIGHT_BREATHING
 #    error "Backlight breathing is not available for software PWM. Please disable."

keyboards/4pplet/eagle_viper_rep/rev_a/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PWM_DRIVER    PWMD2
 #define BACKLIGHT_PWM_CHANNEL   4
-#define BACKLIGHT_PAL_MODE      2
 
 /* Underglow */
 #define WS2812_SPI  SPID1

keyboards/acheron/athena/alpha/alpha.c

@@ -23,7 +23,7 @@ void board_init(void) {
 
 void keyboard_post_init_kb(void){
  // Defining the backlight pin (A6) as an floating (no pullup or pulldown resistor) opendrain output pin
-    palSetLineMode(BACKLIGHT_PIN, PAL_MODE_ALTERNATE(BACKLIGHT_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING);
+    palSetLineMode(BACKLIGHT_PIN, PAL_MODE_ALTERNATE(2) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING);
 }
 
 void led_init_ports(void) {

keyboards/acheron/athena/alpha/config.h

@@ -22,7 +22,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PWM_DRIVER    PWMD3
 #define BACKLIGHT_PWM_CHANNEL   1
-#define BACKLIGHT_PAL_MODE      2
 
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/acheron/athena/beta/config.h

@@ -21,8 +21,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LOCKING_RESYNC_ENABLE
 
 #define BACKLIGHT_PWM_DRIVER    PWMD3
-#define BACKLIGHT_PWM_CHANNEL   3
-#define BACKLIGHT_PAL_MODE      2
 
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/acheron/shark/alpha/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
 
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE

keyboards/acheron/shark/beta/config.h

@@ -22,7 +22,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PWM_DRIVER    PWMD3
 #define BACKLIGHT_PWM_CHANNEL   1
-#define BACKLIGHT_PAL_MODE      2
 
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/checkerboards/nop60/config.h

@@ -17,8 +17,6 @@ Copyright 2021 Nathan Spears
 
 #pragma once
 
-#define BACKLIGHT_PWM_DRIVER    PWMD3
-
 // ws2812 options
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/ebastler/e80_1800/config.h

@@ -16,8 +16,6 @@
 
 #define BACKLIGHT_PWM_DRIVER PWMD1
 #define BACKLIGHT_PWM_CHANNEL 2
-#define BACKLIGHT_PAL_MODE 2
-
 
 #ifdef OLED_ENABLE
 

keyboards/ebastler/isometria_75/rev1/config.h

@@ -20,7 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Backlight */
 #define BACKLIGHT_PWM_DRIVER PWMD1
 #define BACKLIGHT_PWM_CHANNEL 2
-#define BACKLIGHT_PAL_MODE 2
 #define BACKLIGHT_PWM_OUTPUT_FREQUENCY 1000 // Increases backlight PWM freq if compiled with an unmerged PR. Does no harm without it.
 
 /* Underglow */

keyboards/geonworks/frogmini/fms/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER    PWMD1
-#define BACKLIGHT_PWM_CHANNEL   3
 #define BACKLIGHT_PAL_MODE      1
 
 #define I2C_DRIVER I2CD1

keyboards/handwired/onekey/blackpill_f401/config.h

@@ -19,7 +19,6 @@
 
 #define BACKLIGHT_PWM_DRIVER  PWMD5
 #define BACKLIGHT_PWM_CHANNEL 1
-#define BACKLIGHT_PAL_MODE 2
 
 #define ADC_PIN A0
 

keyboards/handwired/onekey/blackpill_f401_tinyuf2/config.h

@@ -19,7 +19,6 @@
 
 #define BACKLIGHT_PWM_DRIVER  PWMD5
 #define BACKLIGHT_PWM_CHANNEL 1
-#define BACKLIGHT_PAL_MODE 2
 
 #define ADC_PIN A0
 

keyboards/handwired/onekey/blackpill_f411/config.h

@@ -19,7 +19,6 @@
 
 #define BACKLIGHT_PWM_DRIVER  PWMD5
 #define BACKLIGHT_PWM_CHANNEL 1
-#define BACKLIGHT_PAL_MODE 2
 
 #define ADC_PIN A0
 

keyboards/handwired/onekey/blackpill_f411_tinyuf2/config.h

@@ -19,7 +19,6 @@
 
 #define BACKLIGHT_PWM_DRIVER  PWMD5
 #define BACKLIGHT_PWM_CHANNEL 1
-#define BACKLIGHT_PAL_MODE 2
 
 #define ADC_PIN A0
 

keyboards/handwired/onekey/evb_wb32f3g71/config.h

@@ -3,13 +3,8 @@
 
 #pragma once
 
-
 #define ADC_PIN A0
 
-#define BACKLIGHT_PWM_DRIVER  PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3
-#define BACKLIGHT_PAL_MODE    2
-
 #define APA102_NOPS (100 / (1000000000L / (CPU_CLOCK / 4)))
 
 #define SOLENOID_PIN B12

keyboards/handwired/onekey/evb_wb32fq95/config.h

@@ -3,13 +3,8 @@
 
 #pragma once
 
-
 #define ADC_PIN A0
 
-#define BACKLIGHT_PWM_DRIVER  PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3
-#define BACKLIGHT_PAL_MODE    2
-
 #define APA102_NOPS (100 / (1000000000L / (CPU_CLOCK / 4)))
 
 #define SOLENOID_PIN B12

keyboards/handwired/onekey/nucleo_f446re/config.h

@@ -2,11 +2,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
-
-#define BACKLIGHT_PWM_DRIVER  PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3
-#define BACKLIGHT_PAL_MODE    2
-
 #define ADC_PIN A0
 
 #define SOLENOID_PINS { B12, B13, B14, B15 }

keyboards/handwired/onekey/nucleo_l432kc/config.h

@@ -2,9 +2,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
-
-#define BACKLIGHT_PWM_DRIVER  PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3
-#define BACKLIGHT_PAL_MODE    2
-
 #define ADC_PIN A0

keyboards/handwired/onekey/proton_c/config.h

@@ -16,9 +16,4 @@
 
 #pragma once
 
-
-#define BACKLIGHT_PWM_DRIVER  PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3
-#define BACKLIGHT_PAL_MODE    2
-
 #define ADC_PIN A0

keyboards/handwired/onekey/rp2040/config.h

@@ -13,7 +13,6 @@
 #define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED GP25
 #define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 500U
 
-#define BACKLIGHT_PWM_DRIVER PWMD4
 #define BACKLIGHT_PWM_CHANNEL RP2040_PWM_CHANNEL_B
 
 #define AUDIO_PIN GP16

keyboards/handwired/onekey/stm32f0_disco/config.h

@@ -16,9 +16,7 @@
 
 #pragma once
 
-
 #define BACKLIGHT_PWM_DRIVER  PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
 #define BACKLIGHT_PAL_MODE    0
 
 #define ADC_PIN A0

keyboards/handwired/pill60/config.h

@@ -1,19 +0,0 @@
- /* Copyright 2020 Imam Rafii
-  *
-  * 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 <http://www.gnu.org/licenses/>.
-  */
-#pragma once
-
-#define BACKLIGHT_PWM_DRIVER    PWMD5
-#define BACKLIGHT_PWM_CHANNEL   1

keyboards/linworks/fave104/config.h

@@ -19,5 +19,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PWM_DRIVER PWMD2
 #define BACKLIGHT_PWM_CHANNEL 2
-#define BACKLIGHT_PAL_MODE 2
 #define BACKLIGHT_PWM_OUTPUT_FREQUENCY 1000 // Increases backlight PWM freq if compiled with an unmerged PR. Does no harm without it.

keyboards/linworks/whale75/config.h

@@ -15,7 +15,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD1
-#define BACKLIGHT_PWM_CHANNEL 3
 #define BACKLIGHT_PAL_MODE 6
 #define BACKLIGHT_PWM_OUTPUT_FREQUENCY 1000 // Increases backlight PWM freq if compiled with an unmerged PR. Does no harm without it.
 

keyboards/mechlovin/adelais/standard_led/arm/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
 
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/mechlovin/hannah65/config.h

@@ -1,21 +0,0 @@
-/*
-Copyright 2020 Team Mechlovin
-
-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 <http://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#define BACKLIGHT_PWM_DRIVER PWMD4
-#define BACKLIGHT_PWM_CHANNEL 3

keyboards/mechlovin/hex4b/rev2/config.h

@@ -1,20 +0,0 @@
-/*
-Copyright 2020 Team Mechlovin
-
-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 <http://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#define BACKLIGHT_PWM_DRIVER PWMD4

keyboards/mechlovin/hex6c/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
 
 #define WEAR_LEVELING_BACKING_SIZE 4096
 #define WEAR_LEVELING_LOGICAL_SIZE 2048

keyboards/mechlovin/infinity87/rev1/config.h

@@ -17,4 +17,3 @@
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3

keyboards/mechlovin/infinity88/config.h

@@ -18,7 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
 
 /*== all animations enable ==*/#define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

keyboards/mechlovin/mechlovin9/rev1/config.h

@@ -1,21 +0,0 @@
-/*
-Copyright 2021 Mechlovin' Studio
-
-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 <http://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3

keyboards/mechlovin/tmkl/config.h

@@ -17,8 +17,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define BACKLIGHT_PWM_DRIVER PWMD3
-#define BACKLIGHT_PWM_CHANNEL 3
-
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE

keyboards/mode/m75s/config.h

@@ -20,7 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BACKLIGHT_DEFAULT_LEVEL 20
 #define BACKLIGHT_PWM_DRIVER PWMD3
 #define BACKLIGHT_PWM_CHANNEL 1
-#define BACKLIGHT_PAL_MODE 2
 
 #define WEAR_LEVELING_LOGICAL_SIZE 2048
 #define WEAR_LEVELING_BACKING_SIZE 4096

keyboards/smithrune/iron165r2/f411/config.h

@@ -19,7 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PWM_DRIVER    PWMD3
 #define BACKLIGHT_PWM_CHANNEL   1
-#define BACKLIGHT_PAL_MODE      2
 
 #define RGBLIGHT_EFFECT_BREATHING
 #define RGBLIGHT_EFFECT_RAINBOW_MOOD

platforms/avr/drivers/backlight_pwm.c

@@ -1,7 +1,8 @@
-#include "quantum.h"
 #include "backlight.h"
 #include "backlight_driver_common.h"
-#include "debug.h"
+#include "progmem.h"
+#include <avr/io.h>
+#include <avr/interrupt.h>
 
 // Maximum duty cycle limit
 #ifndef BACKLIGHT_LIMIT_VAL
@@ -17,7 +18,6 @@
 //   3. Full software PWM, driven by the matrix scan, if both timers are used by Audio.
 
 #if (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && (BACKLIGHT_PIN == B5 || BACKLIGHT_PIN == B6 || BACKLIGHT_PIN == B7)
-#    define HARDWARE_PWM
 #    define ICRx ICR1
 #    define TCCRxA TCCR1A
 #    define TCCRxB TCCR1B
@@ -39,7 +39,6 @@
 #        define OCRxx OCR1C
 #    endif
 #elif (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && (BACKLIGHT_PIN == C4 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
-#    define HARDWARE_PWM
 #    define ICRx ICR3
 #    define TCCRxA TCCR3A
 #    define TCCRxB TCCR3B
@@ -69,7 +68,6 @@
 #        define OCRxx OCR3A
 #    endif
 #elif (defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)) && (BACKLIGHT_PIN == B7 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
-#    define HARDWARE_PWM
 #    define ICRx ICR1
 #    define TCCRxA TCCR1A
 #    define TCCRxB TCCR1B
@@ -91,7 +89,6 @@
 #        define OCRxx OCR1A
 #    endif
 #elif defined(__AVR_ATmega32A__) && (BACKLIGHT_PIN == D4 || BACKLIGHT_PIN == D5)
-#    define HARDWARE_PWM
 #    define ICRx ICR1
 #    define TCCRxA TCCR1A
 #    define TCCRxB TCCR1B
@@ -109,7 +106,6 @@
 #        define OCRxx OCR1A
 #    endif
 #elif (defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)) && (BACKLIGHT_PIN == B1 || BACKLIGHT_PIN == B2)
-#    define HARDWARE_PWM
 #    define ICRx ICR1
 #    define TCCRxA TCCR1A
 #    define TCCRxB TCCR1B
@@ -129,7 +125,6 @@
 #elif (AUDIO_PIN != B5) && (AUDIO_PIN != B6) && (AUDIO_PIN != B7) && (AUDIO_PIN_ALT != B5) && (AUDIO_PIN_ALT != B6) && (AUDIO_PIN_ALT != B7)
 // Timer 1 is not in use by Audio feature, Backlight can use it
 #    pragma message "Using hardware timer 1 with software PWM"
-#    define HARDWARE_PWM
 #    define BACKLIGHT_PWM_TIMER
 #    define ICRx ICR1
 #    define TCCRxA TCCR1A
@@ -148,7 +143,6 @@
 #elif (AUDIO_PIN != C4) && (AUDIO_PIN != C5) && (AUDIO_PIN != C6)
 #    pragma message "Using hardware timer 3 with software PWM"
 // Timer 3 is not in use by Audio feature, Backlight can use it
-#    define HARDWARE_PWM
 #    define BACKLIGHT_PWM_TIMER
 #    define ICRx ICR1
 #    define TCCRxA TCCR3A
@@ -160,10 +154,6 @@
 
 #    define OCIExA OCIE3A
 #    define OCRxx OCR3A
-#elif defined(BACKLIGHT_CUSTOM_DRIVER)
-error("Please set 'BACKLIGHT_DRIVER = custom' within rules.mk")
-#else
-error("Please set 'BACKLIGHT_DRIVER = software' within rules.mk")
 #endif
 
 #ifndef BACKLIGHT_PWM_TIMER // pwm through software

platforms/chibios/drivers/backlight_pwm.c

@@ -1,7 +1,7 @@
-#include "quantum.h"
 #include "backlight.h"
+#include "gpio.h"
+#include "wait.h"
 #include <hal.h>
-#include "debug.h"
 
 // Maximum duty cycle limit
 #ifndef BACKLIGHT_LIMIT_VAL
@@ -13,7 +13,7 @@
 #        define BACKLIGHT_PAL_MODE PAL_MODE_ALTERNATE_PUSHPULL
 #    else
 // GPIOV2 && GPIOV3
-#        define BACKLIGHT_PAL_MODE 5
+#        define BACKLIGHT_PAL_MODE 2
 #    endif
 #endif
 

platforms/chibios/drivers/backlight_timer.c

@@ -1,7 +1,6 @@
-#include "quantum.h"
 #include "backlight.h"
 #include "backlight_driver_common.h"
-#include "debug.h"
+#include "wait.h"
 
 #ifndef BACKLIGHT_GPT_DRIVER
 #    define BACKLIGHT_GPT_DRIVER GPTD15

quantum/backlight/backlight.c

@@ -15,7 +15,6 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "quantum.h"
 #include "backlight.h"
 #include "eeprom.h"
 #include "eeconfig.h"

quantum/backlight/backlight_driver_common.c

@@ -1,6 +1,7 @@
-#include "quantum.h"
 #include "backlight.h"
 #include "backlight_driver_common.h"
+#include "gpio.h"
+#include "util.h"
 
 #if !defined(BACKLIGHT_PIN) && !defined(BACKLIGHT_PINS)
 #    error "Backlight pin/pins not defined. Please configure."