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added functionality for just a port

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This commit is contained in:
Jack Humbert 2017-02-07 15:23:56 -05:00
parent d639bd2021
commit b4e30d3929
1 changed files with 62 additions and 32 deletions
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38
quantum/quantum.c
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@ -594,19 +594,29 @@ static const uint8_t backlight_pin = BACKLIGHT_PIN;
# define COM1x1 COM1A1
# define OCR1x OCR1A
#else
# error "Backlight pin not supported - use B5, B6, or B7"
# define NO_BACKLIGHT_CLOCK
#endif
#ifndef BACKLIGHT_ON_STATE
#define BACKLIGHT_ON_STATE 0
#endif
__attribute__ ((weak))
void backlight_init_ports(void)
{
// Setup backlight pin as output and output low.
// Setup backlight pin as output and output to on state.
// DDRx |= n
_SFR_IO8((backlight_pin >> 4) + 1) |= _BV(backlight_pin & 0xF);
#if BACKLIGHT_ON_STATE == 0
// PORTx &= ~n
_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
#else
// PORTx |= n
_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
#endif
#ifndef NO_BACKLIGHT_CLOCK
// Use full 16-bit resolution.
ICR1 = 0xFFFF;
@ -622,6 +632,7 @@ void backlight_init_ports(void)
TCCR1A = _BV(COM1x1) | _BV(WGM11); // = 0b00001010;
TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
#endif
backlight_init();
#ifdef BACKLIGHT_BREATHING
@ -633,24 +644,43 @@ __attribute__ ((weak))
void backlight_set(uint8_t level)
{
// Prevent backlight blink on lowest level
#if BACKLIGHT_ON_STATE == 0
// PORTx &= ~n
_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
#else
// PORTx |= n
_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
#endif
if ( level == 0 ) {
#ifndef NO_BACKLIGHT_CLOCK
// Turn off PWM control on backlight pin, revert to output low.
TCCR1A &= ~(_BV(COM1x1));
OCR1x = 0x0;
} else if ( level == BACKLIGHT_LEVELS ) {
#else
#if BACKLIGHT_ON_STATE == 0
// PORTx |= n
_SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF);
#else
// PORTx &= ~n
_SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
#endif
#endif
}
#ifndef NO_BACKLIGHT_CLOCK
else if ( level == BACKLIGHT_LEVELS ) {
// Turn on PWM control of backlight pin
TCCR1A |= _BV(COM1x1);
// Set the brightness
OCR1x = 0xFFFF;
} else {
}
else {
// Turn on PWM control of backlight pin
TCCR1A |= _BV(COM1x1);
// Set the brightness
OCR1x = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
}
#endif
#ifdef BACKLIGHT_BREATHING
breathing_intensity_default();