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Fix AVR backlight breathing: low brightness limit & exceeding breathing table max index (#16770)

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Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: David Hoelscher <infinityis@users.noreply.github.com>
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customMK 3 years ago committed by GitHub
parent a372ddcfed
commit 0100629fa2
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1 changed files with 6 additions and 2 deletions
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  1. 8
      quantum/backlight/backlight_avr.c

8
quantum/backlight/backlight_avr.c
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@ -405,14 +405,18 @@ ISR(TIMERx_OVF_vect)
uint16_t interval = (uint16_t)get_breathing_period() * breathing_ISR_frequency / BREATHING_STEPS; uint16_t interval = (uint16_t)get_breathing_period() * breathing_ISR_frequency / BREATHING_STEPS;
// resetting after one period to prevent ugly reset at overflow. // resetting after one period to prevent ugly reset at overflow.
breathing_counter = (breathing_counter + 1) % (get_breathing_period() * breathing_ISR_frequency); breathing_counter = (breathing_counter + 1) % (get_breathing_period() * breathing_ISR_frequency);
uint8_t index = breathing_counter / interval % BREATHING_STEPS; uint8_t index = breathing_counter / interval;
// limit index to max step value
if (index >= BREATHING_STEPS) {
index = BREATHING_STEPS - 1;
}
if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) { if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) {
breathing_interrupt_disable(); breathing_interrupt_disable();
} }
// Set PWM to a brightnessvalue scaled to the configured resolution // Set PWM to a brightnessvalue scaled to the configured resolution
set_pwm(cie_lightness(rescale_limit_val(scale_backlight((uint16_t)pgm_read_byte(&breathing_table[index]) * ICRx / 255)))); set_pwm(cie_lightness(rescale_limit_val(scale_backlight((uint32_t)pgm_read_byte(&breathing_table[index]) * ICRx / 255))));
} }
#endif // BACKLIGHT_BREATHING #endif // BACKLIGHT_BREATHING

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