From 0656f2fa10e25e160617c3e5d14cfbae35dd9c8d Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Fri, 29 Apr 2016 22:19:40 -0400
Subject: moves backlight functionality to keyboard files and updates template
 makefile

previously there were two backlight.c files (bad)
---
 quantum/template/Makefile   | 46 +++++++++++++++++++++++-----------
 quantum/template/template.c | 61 +++++++++++++++++++++++++++++++++++++++++++++
 quantum/template/template.h |  5 +++-
 3 files changed, 97 insertions(+), 15 deletions(-)

(limited to 'quantum/template')

diff --git a/quantum/template/Makefile b/quantum/template/Makefile
index 4fa195468..1a535ef2c 100644
--- a/quantum/template/Makefile
+++ b/quantum/template/Makefile
@@ -111,23 +111,41 @@ OPT_DEFS += -DBOOTLOADER_SIZE=512
 
 
 # Build Options
-#   comment out to disable the options.
-#
-BOOTMAGIC_ENABLE = yes		# Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = yes		# Mouse keys(+4700)
-EXTRAKEY_ENABLE = yes		# Audio control and System control(+450)
-CONSOLE_ENABLE = yes		# Console for debug(+400)
-COMMAND_ENABLE = yes		# Commands for debug and configuration
-KEYBOARD_LOCK_ENABLE = yes	# Allow locking of keyboard via magic key
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = yes        # Console for debug(+400)
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+KEYBOARD_LOCK_ENABLE = yes  # Allow locking of keyboard via magic key
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-# SLEEP_LED_ENABLE = yes	# Breathing sleep LED during USB suspend
-#NKRO_ENABLE = yes			# USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-# BACKLIGHT_ENABLE = yes	# Enable keyboard backlight functionality
-# MIDI_ENABLE = YES			# MIDI controls
-# UNICODE_ENABLE = YES		# Unicode
-# BLUETOOTH_ENABLE = yes	# Enable Bluetooth with the Adafruit EZ-Key HID
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
 
 
+ifdef KEYMAP
+
+ifeq ("$(wildcard keymaps/$(KEYMAP).c)","")
+ifneq ("$(wildcard keymaps/$(KEYMAP)/makefile.mk)","")
+    include keymaps/$(KEYMAP)/makefile.mk
+endif 
+endif
+
+else
+
+ifneq ("$(wildcard keymaps/default/makefile.mk)","")
+    include keymaps/default/makefile.mk
+endif
+
+endif
+
 # Optimize size but this may cause error "relocation truncated to fit"
 #EXTRALDFLAGS = -Wl,--relax
 
diff --git a/quantum/template/template.c b/quantum/template/template.c
index cc52e496f..6050a2d20 100644
--- a/quantum/template/template.c
+++ b/quantum/template/template.c
@@ -46,3 +46,64 @@ void led_set_kb(uint8_t usb_led) {
 
 	led_set_user(usb_led);
 }
+
+#ifdef BACKLIGHT_ENABLE
+#define CHANNEL OCR1C
+
+void backlight_init_ports()
+{
+
+    // Setup PB7 as output and output low.
+    DDRB |= (1<<7);
+    PORTB &= ~(1<<7);
+    
+    // Use full 16-bit resolution. 
+    ICR1 = 0xFFFF;
+
+    // I could write a wall of text here to explain... but TL;DW
+    // Go read the ATmega32u4 datasheet.
+    // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
+    
+    // Pin PB7 = OCR1C (Timer 1, Channel C)
+    // Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0
+    // (i.e. start high, go low when counter matches.)
+    // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0
+    // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1
+    
+    TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010;
+    TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
+
+    backlight_init();
+}
+
+void backlight_set(uint8_t level)
+{
+    if ( level == 0 )
+    {
+        // Turn off PWM control on PB7, revert to output low.
+        TCCR1A &= ~(_BV(COM1C1));
+        CHANNEL = 0x0;
+        // Prevent backlight blink on lowest level
+        PORTB &= ~(_BV(PORTB7));
+    }
+    else if ( level == BACKLIGHT_LEVELS )
+    {
+        // Prevent backlight blink on lowest level
+        PORTB &= ~(_BV(PORTB7));
+        // Turn on PWM control of PB7
+        TCCR1A |= _BV(COM1C1);
+        // Set the brightness
+        CHANNEL = 0xFFFF;
+    }
+    else        
+    {
+        // Prevent backlight blink on lowest level
+        PORTB &= ~(_BV(PORTB7));
+        // Turn on PWM control of PB7
+        TCCR1A |= _BV(COM1C1);
+        // Set the brightness
+        CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
+    }
+}
+
+#endif
\ No newline at end of file
diff --git a/quantum/template/template.h b/quantum/template/template.h
index b1c34d3cb..22742105a 100644
--- a/quantum/template/template.h
+++ b/quantum/template/template.h
@@ -3,7 +3,10 @@
 
 #include "matrix.h"
 #include "keymap_common.h"
-#include "backlight.h"
+#ifdef BACKLIGHT_ENABLE
+	#include "backlight.h"
+#endif
+#include <avr/io.h>
 #include <stddef.h>
 
 // This a shortcut to help you visually see your layout.
-- 
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