Prune out pure software pwm && custom driver && remove wrapping BACKLIGHT_PIN (#8041)
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1 changed files with 239 additions and 282 deletions
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@ -2,7 +2,9 @@
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#include "backlight.h"
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#include "debug.h"
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#if defined(BACKLIGHT_ENABLE) && (defined(BACKLIGHT_PIN) || defined(BACKLIGHT_PINS))
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#if !defined(BACKLIGHT_PIN) && !defined(BACKLIGHT_PINS)
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# error "Backlight pin/pins not defined. Please configure."
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#endif
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// This logic is a bit complex, we support 3 setups:
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//
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@ -12,262 +14,223 @@
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// depends on the Audio setup (Audio wins over Backlight).
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// 3. Full software PWM, driven by the matrix scan, if both timers are used by Audio.
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# 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)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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#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)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == B5
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# elif BACKLIGHT_PIN == B6
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == B7
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# define COMxx0 COM1C0
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# define COMxx1 COM1C1
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# define OCRxx OCR1C
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# endif
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# 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)
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# define HARDWARE_PWM
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# define ICRx ICR3
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# define TCCRxA TCCR3A
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# define TCCRxB TCCR3B
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# define TIMERx_OVF_vect TIMER3_OVF_vect
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# define TIMSKx TIMSK3
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# define TOIEx TOIE3
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# if BACKLIGHT_PIN == B5
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# elif BACKLIGHT_PIN == B6
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == B7
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# define COMxx0 COM1C0
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# define COMxx1 COM1C1
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# define OCRxx OCR1C
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# endif
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#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)
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# define HARDWARE_PWM
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# define ICRx ICR3
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# define TCCRxA TCCR3A
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# define TCCRxB TCCR3B
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# define TIMERx_OVF_vect TIMER3_OVF_vect
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# define TIMSKx TIMSK3
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# define TOIEx TOIE3
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# if BACKLIGHT_PIN == C4
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# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
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# error This MCU has no C4 pin!
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# else
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# define COMxx0 COM3C0
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# define COMxx1 COM3C1
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# define OCRxx OCR3C
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# endif
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# elif BACKLIGHT_PIN == C5
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# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
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# error This MCU has no C5 pin!
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# else
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# define COMxx0 COM3B0
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# define COMxx1 COM3B1
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# define OCRxx OCR3B
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# endif
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# elif BACKLIGHT_PIN == C6
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# define COMxx0 COM3A0
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# define COMxx1 COM3A1
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# define OCRxx OCR3A
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# endif
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# elif (defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)) && (BACKLIGHT_PIN == B7 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == B7
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# define COMxx0 COM1C0
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# define COMxx1 COM1C1
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# define OCRxx OCR1C
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# elif BACKLIGHT_PIN == C5
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == C6
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# endif
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# elif defined(__AVR_ATmega32A__) && (BACKLIGHT_PIN == D4 || BACKLIGHT_PIN == D5)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == D4
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == D5
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# endif
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# elif defined(__AVR_ATmega328P__) && (BACKLIGHT_PIN == B1 || BACKLIGHT_PIN == B2)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == B1
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# elif BACKLIGHT_PIN == B2
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# endif
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# else
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# if !defined(BACKLIGHT_CUSTOM_DRIVER)
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# if !defined(B5_AUDIO) && !defined(B6_AUDIO) && !defined(B7_AUDIO)
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// Timer 1 is not in use by Audio feature, Backlight can use it
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# pragma message "Using hardware timer 1 with software PWM"
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# define HARDWARE_PWM
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# define BACKLIGHT_PWM_TIMER
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_COMPA_vect TIMER1_COMPA_vect
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# if defined(__AVR_ATmega32A__) // This MCU has only one TIMSK register
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# define TIMSKx TIMSK
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# else
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# define TIMSKx TIMSK1
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# endif
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# define TOIEx TOIE1
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# define OCIExA OCIE1A
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# define OCRxx OCR1A
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# elif !defined(C6_AUDIO) && !defined(C5_AUDIO) && !defined(C4_AUDIO)
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# pragma message "Using hardware timer 3 with software PWM"
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// Timer 3 is not in use by Audio feature, Backlight can use it
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# define HARDWARE_PWM
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# define BACKLIGHT_PWM_TIMER
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# define ICRx ICR1
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# define TCCRxA TCCR3A
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# define TCCRxB TCCR3B
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# define TIMERx_COMPA_vect TIMER3_COMPA_vect
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# define TIMERx_OVF_vect TIMER3_OVF_vect
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# define TIMSKx TIMSK3
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# define TOIEx TOIE3
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# define OCIExA OCIE3A
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# define OCRxx OCR3A
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# else
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# pragma message "Audio in use - using pure software PWM"
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# define NO_HARDWARE_PWM
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# endif
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# if BACKLIGHT_PIN == C4
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# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
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# error This MCU has no C4 pin!
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# else
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# pragma message "Custom driver defined - using pure software PWM"
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# define NO_HARDWARE_PWM
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# define COMxx0 COM3C0
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# define COMxx1 COM3C1
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# define OCRxx OCR3C
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# endif
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# elif BACKLIGHT_PIN == C5
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# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
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# error This MCU has no C5 pin!
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# else
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# define COMxx0 COM3B0
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# define COMxx1 COM3B1
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# define OCRxx OCR3B
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# endif
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# elif BACKLIGHT_PIN == C6
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# define COMxx0 COM3A0
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# define COMxx1 COM3A1
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# define OCRxx OCR3A
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# endif
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#elif (defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)) && (BACKLIGHT_PIN == B7 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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# ifndef BACKLIGHT_ON_STATE
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# define BACKLIGHT_ON_STATE 1
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# if BACKLIGHT_PIN == B7
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# define COMxx0 COM1C0
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# define COMxx1 COM1C1
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# define OCRxx OCR1C
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# elif BACKLIGHT_PIN == C5
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == C6
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# endif
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#elif defined(__AVR_ATmega32A__) && (BACKLIGHT_PIN == D4 || BACKLIGHT_PIN == D5)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == D4
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# elif BACKLIGHT_PIN == D5
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# endif
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#elif defined(__AVR_ATmega328P__) && (BACKLIGHT_PIN == B1 || BACKLIGHT_PIN == B2)
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# define HARDWARE_PWM
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# define TIMSKx TIMSK1
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# define TOIEx TOIE1
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# if BACKLIGHT_PIN == B1
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# define COMxx0 COM1A0
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# define COMxx1 COM1A1
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# define OCRxx OCR1A
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# elif BACKLIGHT_PIN == B2
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# define COMxx0 COM1B0
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# define COMxx1 COM1B1
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# define OCRxx OCR1B
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# endif
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#elif !defined(B5_AUDIO) && !defined(B6_AUDIO) && !defined(B7_AUDIO)
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// Timer 1 is not in use by Audio feature, Backlight can use it
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# pragma message "Using hardware timer 1 with software PWM"
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# define HARDWARE_PWM
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# define BACKLIGHT_PWM_TIMER
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# define ICRx ICR1
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# define TCCRxA TCCR1A
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# define TCCRxB TCCR1B
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# define TIMERx_COMPA_vect TIMER1_COMPA_vect
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# define TIMERx_OVF_vect TIMER1_OVF_vect
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# if defined(__AVR_ATmega32A__) // This MCU has only one TIMSK register
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# define TIMSKx TIMSK
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# else
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# define TIMSKx TIMSK1
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# endif
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# define TOIEx TOIE1
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# define OCIExA OCIE1A
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# define OCRxx OCR1A
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#elif !defined(C6_AUDIO) && !defined(C5_AUDIO) && !defined(C4_AUDIO)
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# pragma message "Using hardware timer 3 with software PWM"
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// Timer 3 is not in use by Audio feature, Backlight can use it
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# define HARDWARE_PWM
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# define BACKLIGHT_PWM_TIMER
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# define ICRx ICR1
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# define TCCRxA TCCR3A
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# define TCCRxB TCCR3B
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# define TIMERx_COMPA_vect TIMER3_COMPA_vect
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# define TIMERx_OVF_vect TIMER3_OVF_vect
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# define TIMSKx TIMSK3
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# define TOIEx TOIE3
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# define OCIExA OCIE3A
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# define OCRxx OCR3A
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#elif defined(BACKLIGHT_CUSTOM_DRIVER)
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error("Please set 'BACKLIGHT_DRIVER = custom' within rules.mk")
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#else
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error("Please set 'BACKLIGHT_DRIVER = software' within rules.mk")
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#endif
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#ifndef BACKLIGHT_ON_STATE
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# define BACKLIGHT_ON_STATE 1
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#endif
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void backlight_on(pin_t backlight_pin) {
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# if BACKLIGHT_ON_STATE == 1
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#if BACKLIGHT_ON_STATE == 1
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writePinHigh(backlight_pin);
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# else
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#else
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writePinLow(backlight_pin);
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# endif
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#endif
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}
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void backlight_off(pin_t backlight_pin) {
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# if BACKLIGHT_ON_STATE == 1
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#if BACKLIGHT_ON_STATE == 1
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writePinLow(backlight_pin);
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# else
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#else
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writePinHigh(backlight_pin);
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# endif
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#endif
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}
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# if defined(NO_HARDWARE_PWM) || defined(BACKLIGHT_PWM_TIMER) // pwm through software
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#ifdef BACKLIGHT_PWM_TIMER // pwm through software
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// we support multiple backlight pins
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# ifndef BACKLIGHT_LED_COUNT
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# define BACKLIGHT_LED_COUNT 1
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# endif
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# ifndef BACKLIGHT_LED_COUNT
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# define BACKLIGHT_LED_COUNT 1
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# endif
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# if BACKLIGHT_LED_COUNT == 1
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# define BACKLIGHT_PIN_INIT \
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{ BACKLIGHT_PIN }
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# else
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# define BACKLIGHT_PIN_INIT BACKLIGHT_PINS
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# endif
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# if BACKLIGHT_LED_COUNT == 1
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# define BACKLIGHT_PIN_INIT \
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{ BACKLIGHT_PIN }
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# else
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# define BACKLIGHT_PIN_INIT BACKLIGHT_PINS
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# endif
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# define FOR_EACH_LED(x) \
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for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
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pin_t backlight_pin = backlight_pins[i]; \
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{ x } \
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}
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# define FOR_EACH_LED(x) \
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for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
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pin_t backlight_pin = backlight_pins[i]; \
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{ x } \
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}
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static const pin_t backlight_pins[BACKLIGHT_LED_COUNT] = BACKLIGHT_PIN_INIT;
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# else // full hardware PWM
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#else // full hardware PWM
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static inline void enable_pwm(void) {
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# if BACKLIGHT_ON_STATE == 1
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# if BACKLIGHT_ON_STATE == 1
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TCCRxA |= _BV(COMxx1);
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# else
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# else
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TCCRxA |= _BV(COMxx1) | _BV(COMxx0);
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# endif
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# endif
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}
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static inline void disable_pwm(void) {
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# if BACKLIGHT_ON_STATE == 1
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# if BACKLIGHT_ON_STATE == 1
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TCCRxA &= ~(_BV(COMxx1));
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# else
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# else
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TCCRxA &= ~(_BV(COMxx1) | _BV(COMxx0));
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# endif
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# endif
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}
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// we support only one backlight pin
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static const pin_t backlight_pin = BACKLIGHT_PIN;
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# define FOR_EACH_LED(x) x
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# define FOR_EACH_LED(x) x
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# endif
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#endif
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# ifdef NO_HARDWARE_PWM
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void backlight_init_ports(void) {
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// Setup backlight pin as output and output to on state.
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FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
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# ifdef BACKLIGHT_BREATHING
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if (is_backlight_breathing()) {
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breathing_enable();
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}
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# endif
|
||||
}
|
||||
|
||||
uint8_t backlight_tick = 0;
|
||||
|
||||
# ifndef BACKLIGHT_CUSTOM_DRIVER
|
||||
void backlight_task(void) {
|
||||
if ((0xFFFF >> ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) {
|
||||
FOR_EACH_LED(backlight_on(backlight_pin);)
|
||||
} else {
|
||||
FOR_EACH_LED(backlight_off(backlight_pin);)
|
||||
}
|
||||
backlight_tick = (backlight_tick + 1) % 16;
|
||||
}
|
||||
# endif
|
||||
|
||||
# ifdef BACKLIGHT_BREATHING
|
||||
# ifndef BACKLIGHT_CUSTOM_DRIVER
|
||||
# error "Backlight breathing only available with hardware PWM. Please disable."
|
||||
# endif
|
||||
# endif
|
||||
|
||||
# else // hardware pwm through timer
|
||||
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
#ifdef BACKLIGHT_PWM_TIMER
|
||||
|
||||
// The idea of software PWM assisted by hardware timers is the following
|
||||
// we use the hardware timer in fast PWM mode like for hardware PWM, but
|
||||
|
@ -288,11 +251,11 @@ ISR(TIMERx_COMPA_vect) { FOR_EACH_LED(backlight_off(backlight_pin);) }
|
|||
// Triggered when the counter reaches the TOP value
|
||||
// this one triggers at F_CPU/65536 =~ 244 Hz
|
||||
ISR(TIMERx_OVF_vect) {
|
||||
# ifdef BACKLIGHT_BREATHING
|
||||
# ifdef BACKLIGHT_BREATHING
|
||||
if (is_breathing()) {
|
||||
breathing_task();
|
||||
}
|
||||
# endif
|
||||
# endif
|
||||
// for very small values of OCRxx (or backlight level)
|
||||
// we can't guarantee this whole code won't execute
|
||||
// at the same time as the compare match interrupt
|
||||
|
@ -306,9 +269,9 @@ ISR(TIMERx_OVF_vect) {
|
|||
}
|
||||
}
|
||||
|
||||
# endif
|
||||
#endif
|
||||
|
||||
# define TIMER_TOP 0xFFFFU
|
||||
#define TIMER_TOP 0xFFFFU
|
||||
|
||||
// See http://jared.geek.nz/2013/feb/linear-led-pwm
|
||||
static uint16_t cie_lightness(uint16_t v) {
|
||||
|
@ -329,88 +292,86 @@ 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) { OCRxx = val; }
|
||||
|
||||
# ifndef BACKLIGHT_CUSTOM_DRIVER
|
||||
void backlight_set(uint8_t level) {
|
||||
if (level > BACKLIGHT_LEVELS) level = BACKLIGHT_LEVELS;
|
||||
|
||||
if (level == 0) {
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
#ifdef BACKLIGHT_PWM_TIMER
|
||||
if (OCRxx) {
|
||||
TIMSKx &= ~(_BV(OCIExA));
|
||||
TIMSKx &= ~(_BV(TOIEx));
|
||||
}
|
||||
# else
|
||||
#else
|
||||
// Turn off PWM control on backlight pin
|
||||
disable_pwm();
|
||||
# endif
|
||||
#endif
|
||||
FOR_EACH_LED(backlight_off(backlight_pin);)
|
||||
} else {
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
#ifdef BACKLIGHT_PWM_TIMER
|
||||
if (!OCRxx) {
|
||||
TIMSKx |= _BV(OCIExA);
|
||||
TIMSKx |= _BV(TOIEx);
|
||||
}
|
||||
# else
|
||||
#else
|
||||
// Turn on PWM control of backlight pin
|
||||
enable_pwm();
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
// Set the brightness
|
||||
set_pwm(cie_lightness(TIMER_TOP * (uint32_t)level / BACKLIGHT_LEVELS));
|
||||
}
|
||||
|
||||
void backlight_task(void) {}
|
||||
# endif // BACKLIGHT_CUSTOM_DRIVER
|
||||
|
||||
# ifdef BACKLIGHT_BREATHING
|
||||
#ifdef BACKLIGHT_BREATHING
|
||||
|
||||
# define BREATHING_NO_HALT 0
|
||||
# define BREATHING_HALT_OFF 1
|
||||
# define BREATHING_HALT_ON 2
|
||||
# define BREATHING_STEPS 128
|
||||
# define BREATHING_NO_HALT 0
|
||||
# define BREATHING_HALT_OFF 1
|
||||
# define BREATHING_HALT_ON 2
|
||||
# define BREATHING_STEPS 128
|
||||
|
||||
static uint8_t breathing_halt = BREATHING_NO_HALT;
|
||||
static uint8_t breathing_halt = BREATHING_NO_HALT;
|
||||
static uint16_t breathing_counter = 0;
|
||||
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
static bool breathing = false;
|
||||
|
||||
bool is_breathing(void) { return breathing; }
|
||||
|
||||
# define breathing_interrupt_enable() \
|
||||
do { \
|
||||
breathing = true; \
|
||||
} while (0)
|
||||
# define breathing_interrupt_disable() \
|
||||
do { \
|
||||
breathing = false; \
|
||||
} while (0)
|
||||
# else
|
||||
# define breathing_interrupt_enable() \
|
||||
do { \
|
||||
breathing = true; \
|
||||
} while (0)
|
||||
# define breathing_interrupt_disable() \
|
||||
do { \
|
||||
breathing = false; \
|
||||
} while (0)
|
||||
# else
|
||||
|
||||
bool is_breathing(void) { return !!(TIMSKx & _BV(TOIEx)); }
|
||||
|
||||
# define breathing_interrupt_enable() \
|
||||
do { \
|
||||
TIMSKx |= _BV(TOIEx); \
|
||||
} while (0)
|
||||
# define breathing_interrupt_disable() \
|
||||
do { \
|
||||
TIMSKx &= ~_BV(TOIEx); \
|
||||
} while (0)
|
||||
# endif
|
||||
# define breathing_interrupt_enable() \
|
||||
do { \
|
||||
TIMSKx |= _BV(TOIEx); \
|
||||
} while (0)
|
||||
# define breathing_interrupt_disable() \
|
||||
do { \
|
||||
TIMSKx &= ~_BV(TOIEx); \
|
||||
} while (0)
|
||||
# endif
|
||||
|
||||
# define breathing_min() \
|
||||
do { \
|
||||
breathing_counter = 0; \
|
||||
} while (0)
|
||||
# define breathing_max() \
|
||||
do { \
|
||||
breathing_counter = get_breathing_period() * 244 / 2; \
|
||||
} while (0)
|
||||
# define breathing_min() \
|
||||
do { \
|
||||
breathing_counter = 0; \
|
||||
} while (0)
|
||||
# define breathing_max() \
|
||||
do { \
|
||||
breathing_counter = get_breathing_period() * 244 / 2; \
|
||||
} while (0)
|
||||
|
||||
void breathing_enable(void) {
|
||||
breathing_counter = 0;
|
||||
breathing_halt = BREATHING_NO_HALT;
|
||||
breathing_halt = BREATHING_NO_HALT;
|
||||
breathing_interrupt_enable();
|
||||
}
|
||||
|
||||
|
@ -451,20 +412,20 @@ static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0,
|
|||
// Use this before the cie_lightness function.
|
||||
static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); }
|
||||
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
void breathing_task(void)
|
||||
# else
|
||||
# else
|
||||
/* Assuming a 16MHz CPU clock and a timer that resets at 64k (ICR1), the following interrupt handler will run
|
||||
* about 244 times per second.
|
||||
*/
|
||||
ISR(TIMERx_OVF_vect)
|
||||
# endif
|
||||
# endif
|
||||
{
|
||||
uint8_t breathing_period = get_breathing_period();
|
||||
uint16_t interval = (uint16_t)breathing_period * 244 / BREATHING_STEPS;
|
||||
uint8_t breathing_period = get_breathing_period();
|
||||
uint16_t interval = (uint16_t)breathing_period * 244 / BREATHING_STEPS;
|
||||
// resetting after one period to prevent ugly reset at overflow.
|
||||
breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
|
||||
uint8_t index = breathing_counter / interval % BREATHING_STEPS;
|
||||
uint8_t index = breathing_counter / interval % BREATHING_STEPS;
|
||||
|
||||
if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) {
|
||||
breathing_interrupt_disable();
|
||||
|
@ -473,7 +434,7 @@ ISR(TIMERx_OVF_vect)
|
|||
set_pwm(cie_lightness(scale_backlight((uint16_t)pgm_read_byte(&breathing_table[index]) * 0x0101U)));
|
||||
}
|
||||
|
||||
# endif // BACKLIGHT_BREATHING
|
||||
#endif // BACKLIGHT_BREATHING
|
||||
|
||||
void backlight_init_ports(void) {
|
||||
// Setup backlight pin as output and output to on state.
|
||||
|
@ -483,12 +444,12 @@ void backlight_init_ports(void) {
|
|||
// Go read the ATmega32u4 datasheet.
|
||||
// And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
|
||||
|
||||
# ifdef BACKLIGHT_PWM_TIMER
|
||||
#ifdef BACKLIGHT_PWM_TIMER
|
||||
// TimerX setup, Fast PWM mode count to TOP set in ICRx
|
||||
TCCRxA = _BV(WGM11); // = 0b00000010;
|
||||
// clock select clk/1
|
||||
TCCRxB = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
|
||||
# else // hardware PWM
|
||||
#else // hardware PWM
|
||||
// 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.)
|
||||
|
@ -500,25 +461,21 @@ 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)."
|
||||
*/
|
||||
# if BACKLIGHT_ON_STATE == 1
|
||||
# if BACKLIGHT_ON_STATE == 1
|
||||
TCCRxA = _BV(COMxx1) | _BV(WGM11);
|
||||
# else
|
||||
# else
|
||||
TCCRxA = _BV(COMxx1) | _BV(COMxx0) | _BV(WGM11);
|
||||
# endif
|
||||
# endif
|
||||
|
||||
TCCRxB = _BV(WGM13) | _BV(WGM12) | _BV(CS10);
|
||||
# endif
|
||||
#endif
|
||||
// Use full 16-bit resolution. Counter counts to ICR1 before reset to 0.
|
||||
ICRx = TIMER_TOP;
|
||||
|
||||
backlight_init();
|
||||
# ifdef BACKLIGHT_BREATHING
|
||||
#ifdef BACKLIGHT_BREATHING
|
||||
if (is_backlight_breathing()) {
|
||||
breathing_enable();
|
||||
}
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
|
||||
# endif // hardware backlight
|
||||
|
||||
#endif // backlight
|
||||
|
|
Loading…
Reference in a new issue