From ffa119941cac14d6e81853da670f8223823112c3 Mon Sep 17 00:00:00 2001
From: Wilba6582 <Jason.S.Wiliams@gmail.com>
Date: Sat, 14 Jul 2018 02:48:14 +1000
Subject: [PATCH] Added pin C6 to hardware PWM backlight
---
quantum/quantum.c | 40 +++++++++++++++++++++++++++-------------
1 file changed, 27 insertions(+), 13 deletions(-)
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 5abd222d19..b9934aee8f 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -898,14 +898,29 @@ static const uint8_t backlight_pin = BACKLIGHT_PIN;
// depending on the pin, we use a different output compare unit
#if BACKLIGHT_PIN == B7
-# define COM1x1 COM1C1
-# define OCR1x OCR1C
+# define TCCRxA TCCR1A
+# define TCCRxB TCCR1B
+# define COMxx1 COM1C1
+# define OCRxx OCR1C
+# define ICRx ICR1
#elif BACKLIGHT_PIN == B6
-# define COM1x1 COM1B1
-# define OCR1x OCR1B
+# define TCCRxA TCCR1A
+# define TCCRxB TCCR1B
+# define COMxx1 COM1B1
+# define OCRxx OCR1B
+# define ICRx ICR1
#elif BACKLIGHT_PIN == B5
-# define COM1x1 COM1A1
-# define OCR1x OCR1A
+# define TCCRxA TCCR1A
+# define TCCRxB TCCR1B
+# define COMxx1 COM1A1
+# define OCRxx OCR1A
+# define ICRx ICR1
+#elif BACKLIGHT_PIN == C6
+# define TCCRxA TCCR3A
+# define TCCRxB TCCR3B
+# define COMxx1 COM1A1
+# define OCRxx OCR3A
+# define ICRx ICR3
#else
# define NO_HARDWARE_PWM
#endif
@@ -987,7 +1002,7 @@ static uint16_t cie_lightness(uint16_t v) {
// range for val is [0..TIMER_TOP]. PWM pin is high while the timer count is below val.
static inline void set_pwm(uint16_t val) {
- OCR1x = val;
+ OCRxx = val;
}
#ifndef BACKLIGHT_CUSTOM_DRIVER
@@ -998,10 +1013,10 @@ void backlight_set(uint8_t level) {
if (level == 0) {
// Turn off PWM control on backlight pin
- TCCR1A &= ~(_BV(COM1x1));
+ TCCRxA &= ~(_BV(COMxx1));
} else {
// Turn on PWM control of backlight pin
- TCCR1A |= _BV(COM1x1);
+ TCCRxA |= _BV(COMxx1);
}
// Set the brightness
set_pwm(cie_lightness(TIMER_TOP * (uint32_t)level / BACKLIGHT_LEVELS));
@@ -1149,11 +1164,10 @@ void backlight_init_ports(void)
"In fast PWM mode, the compare units allow generation of PWM waveforms on the OCnx pins. Setting the COMnx1:0 bits to two will produce a non-inverted PWM [..]."
"In fast PWM mode the counter is incremented until the counter value matches either one of the fixed values 0x00FF, 0x01FF, or 0x03FF (WGMn3:0 = 5, 6, or 7), the value in ICRn (WGMn3:0 = 14), or the value in OCRnA (WGMn3:0 = 15)."
*/
-
- TCCR1A = _BV(COM1x1) | _BV(WGM11); // = 0b00001010;
- TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
+ TCCRxA = _BV(COMxx1) | _BV(WGM11); // = 0b00001010;
+ TCCRxB = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
// Use full 16-bit resolution. Counter counts to ICR1 before reset to 0.
- ICR1 = TIMER_TOP;
+ ICRx = TIMER_TOP;
backlight_init();
#ifdef BACKLIGHT_BREATHING