added functionality for just a port
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d639bd2021
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b4e30d3929
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@ -594,19 +594,29 @@ static const uint8_t backlight_pin = BACKLIGHT_PIN;
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# define COM1x1 COM1A1
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# define OCR1x OCR1A
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#else
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# error "Backlight pin not supported - use B5, B6, or B7"
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# define NO_BACKLIGHT_CLOCK
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#endif
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#ifndef BACKLIGHT_ON_STATE
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#define BACKLIGHT_ON_STATE 0
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#endif
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__attribute__ ((weak))
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void backlight_init_ports(void)
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{
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// Setup backlight pin as output and output low.
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// Setup backlight pin as output and output to on state.
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// DDRx |= n
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_SFR_IO8((backlight_pin >> 4) + 1) |= _BV(backlight_pin & 0xF);
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#if BACKLIGHT_ON_STATE == 0
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// PORTx &= ~n
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_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
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#else
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// PORTx |= n
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_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
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#endif
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#ifndef NO_BACKLIGHT_CLOCK
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// Use full 16-bit resolution.
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ICR1 = 0xFFFF;
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@ -622,6 +632,7 @@ void backlight_init_ports(void)
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TCCR1A = _BV(COM1x1) | _BV(WGM11); // = 0b00001010;
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TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
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#endif
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backlight_init();
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#ifdef BACKLIGHT_BREATHING
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@ -633,24 +644,43 @@ __attribute__ ((weak))
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void backlight_set(uint8_t level)
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{
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// Prevent backlight blink on lowest level
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#if BACKLIGHT_ON_STATE == 0
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// PORTx &= ~n
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_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
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#else
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// PORTx |= n
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_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
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#endif
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if ( level == 0 ) {
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#ifndef NO_BACKLIGHT_CLOCK
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// Turn off PWM control on backlight pin, revert to output low.
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TCCR1A &= ~(_BV(COM1x1));
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OCR1x = 0x0;
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} else if ( level == BACKLIGHT_LEVELS ) {
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#else
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#if BACKLIGHT_ON_STATE == 0
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// PORTx |= n
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_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
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#else
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// PORTx &= ~n
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_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
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#endif
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#endif
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}
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#ifndef NO_BACKLIGHT_CLOCK
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else if ( level == BACKLIGHT_LEVELS ) {
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// Turn on PWM control of backlight pin
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TCCR1A |= _BV(COM1x1);
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// Set the brightness
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OCR1x = 0xFFFF;
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} else {
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}
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else {
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// Turn on PWM control of backlight pin
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TCCR1A |= _BV(COM1x1);
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// Set the brightness
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OCR1x = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
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}
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#endif
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#ifdef BACKLIGHT_BREATHING
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breathing_intensity_default();
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