From b80b6b369c5ecb5c7232edf1e8cebe8c12078d6e Mon Sep 17 00:00:00 2001 From: Wilba6582 Date: Tue, 17 Mar 2015 00:51:36 +1100 Subject: Added backlight.h, backlight.c --- keyboard/planck/backlight.c | 46 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 keyboard/planck/backlight.c (limited to 'keyboard/planck/backlight.c') diff --git a/keyboard/planck/backlight.c b/keyboard/planck/backlight.c new file mode 100644 index 0000000000..d12dcf2386 --- /dev/null +++ b/keyboard/planck/backlight.c @@ -0,0 +1,46 @@ + +#include +#include "backlight.h" + + +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; + + // Default to zero duty cycle. + OCR1C = 0x0000; +} + +void backlight_set(uint8_t level) +{ + if ( level == 0 ) + { + // Turn off PWM control on PB7, revert to output low. + TCCR1A &= ~(_BV(COM1C1)); + } + else + { + // Turn on PWM control of PB7 + TCCR1A |= _BV(COM1C1); + OCR1C = level << 12 | 0x0FFF; + } +} + -- cgit v1.2.3 From 65680819df13585a563296f008be1a4b0ee8045a Mon Sep 17 00:00:00 2001 From: Wilba6582 Date: Tue, 17 Mar 2015 00:56:41 +1100 Subject: Replaced tabs with spaces to match TMK convention. --- keyboard/planck/backlight.c | 64 ++++++++++++++++++++++----------------------- 1 file changed, 32 insertions(+), 32 deletions(-) (limited to 'keyboard/planck/backlight.c') diff --git a/keyboard/planck/backlight.c b/keyboard/planck/backlight.c index d12dcf2386..ee7e31ee9c 100644 --- a/keyboard/planck/backlight.c +++ b/keyboard/planck/backlight.c @@ -5,42 +5,42 @@ void backlight_init_ports() { - // Setup PB7 as output and output low. - DDRB |= (1<<7); - PORTB &= ~(1<<7); - - // Use full 16-bit resolution. - ICR1 = 0xFFFF; + // 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; - - // Default to zero duty cycle. - OCR1C = 0x0000; + // 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; + + // Default to zero duty cycle. + OCR1C = 0x0000; } void backlight_set(uint8_t level) { - if ( level == 0 ) - { - // Turn off PWM control on PB7, revert to output low. - TCCR1A &= ~(_BV(COM1C1)); - } - else - { - // Turn on PWM control of PB7 - TCCR1A |= _BV(COM1C1); - OCR1C = level << 12 | 0x0FFF; - } + if ( level == 0 ) + { + // Turn off PWM control on PB7, revert to output low. + TCCR1A &= ~(_BV(COM1C1)); + } + else + { + // Turn on PWM control of PB7 + TCCR1A |= _BV(COM1C1); + OCR1C = level << 12 | 0x0FFF; + } } -- cgit v1.2.3 From cb3e499cc7dbff2607bc43cb05fc8c29a2eb9d30 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Thu, 7 May 2015 15:34:46 -0400 Subject: backlight stuff --- keyboard/planck/backlight.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'keyboard/planck/backlight.c') diff --git a/keyboard/planck/backlight.c b/keyboard/planck/backlight.c index ee7e31ee9c..a560687ec0 100644 --- a/keyboard/planck/backlight.c +++ b/keyboard/planck/backlight.c @@ -2,9 +2,11 @@ #include #include "backlight.h" +#define CHANNEL OCR1C -void backlight_init_ports() +void backlight_init_ports(uint8_t level) { + // Setup PB7 as output and output low. DDRB |= (1<<7); PORTB &= ~(1<<7); @@ -24,9 +26,8 @@ void backlight_init_ports() TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010; TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001; - - // Default to zero duty cycle. - OCR1C = 0x0000; + + backlight_init(); } void backlight_set(uint8_t level) @@ -35,12 +36,14 @@ void backlight_set(uint8_t level) { // Turn off PWM control on PB7, revert to output low. TCCR1A &= ~(_BV(COM1C1)); + // CHANNEL = level << OFFSET | 0x0FFF; + CHANNEL = ((1 << level) - 1); } else { // Turn on PWM control of PB7 TCCR1A |= _BV(COM1C1); - OCR1C = level << 12 | 0x0FFF; + // CHANNEL = level << OFFSET | 0x0FFF; + CHANNEL = ((1 << level) - 1); } -} - +} \ No newline at end of file -- cgit v1.2.3 From 0e189b6bddb6b71d2aaa019689fbdb03beafa8a3 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Fri, 15 May 2015 21:57:29 -0400 Subject: quark --- keyboard/planck/backlight.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'keyboard/planck/backlight.c') diff --git a/keyboard/planck/backlight.c b/keyboard/planck/backlight.c index a560687ec0..06f103b4ac 100644 --- a/keyboard/planck/backlight.c +++ b/keyboard/planck/backlight.c @@ -4,7 +4,7 @@ #define CHANNEL OCR1C -void backlight_init_ports(uint8_t level) +void backlight_init_ports() { // Setup PB7 as output and output low. -- cgit v1.2.3