diff options
Diffstat (limited to 'quantum/quantum.c')
| -rw-r--r-- | quantum/quantum.c | 406 |
1 files changed, 169 insertions, 237 deletions
diff --git a/quantum/quantum.c b/quantum/quantum.c index c80975f21b..88617412c9 100644 --- a/quantum/quantum.c +++ b/quantum/quantum.c @@ -23,6 +23,10 @@ #define TAPPING_TERM 200 #endif +#ifndef BREATHING_PERIOD +#define BREATHING_PERIOD 6 +#endif + #include "backlight.h" extern backlight_config_t backlight_config; @@ -618,7 +622,17 @@ bool process_record_quantum(keyrecord_t *record) { } send_keyboard_report(); + return false; } + +#if defined(BACKLIGHT_ENABLE) && defined(BACKLIGHT_BREATHING) + case BL_BRTG: { + if (record->event.pressed) + breathing_toggle(); + return false; + } +#endif + default: { shift_interrupted[0] = true; shift_interrupted[1] = true; @@ -831,6 +845,7 @@ void matrix_scan_quantum() { 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 @@ -841,17 +856,18 @@ static const uint8_t backlight_pin = BACKLIGHT_PIN; # define COM1x1 COM1A1 # define OCR1x OCR1A #else -# define NO_BACKLIGHT_CLOCK +# define NO_HARDWARE_PWM #endif #ifndef BACKLIGHT_ON_STATE #define BACKLIGHT_ON_STATE 0 #endif +#ifdef NO_HARDWARE_PWM // pwm through software + __attribute__ ((weak)) void backlight_init_ports(void) { - // Setup backlight pin as output and output to on state. // DDRx |= n _SFR_IO8((backlight_pin >> 4) + 1) |= _BV(backlight_pin & 0xF); @@ -862,83 +878,15 @@ void backlight_init_ports(void) // PORTx |= n _SFR_IO8((backlight_pin >> 4) + 2) |= _BV(backlight_pin & 0xF); #endif - - #ifndef NO_BACKLIGHT_CLOCK - // Use full 16-bit resolution. - ICR1 = 0xFFFF; - - // I could write a wall of text here to explain... but TL;DW - // Go read the ATmega32u4 datasheet. - // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on - - // 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.) - // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0 - // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1 - - TCCR1A = _BV(COM1x1) | _BV(WGM11); // = 0b00001010; - TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001; - #endif - - backlight_init(); - #ifdef BACKLIGHT_BREATHING - breathing_defaults(); - #endif } __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 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 { - // 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(); - #endif -} +void backlight_set(uint8_t level) {} uint8_t backlight_tick = 0; void backlight_task(void) { - #ifdef NO_BACKLIGHT_CLOCK - if ((0xFFFF >> ((BACKLIGHT_LEVELS - backlight_config.level) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) { + if ((0xFFFF >> ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) { #if BACKLIGHT_ON_STATE == 0 // PORTx &= ~n _SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF); @@ -955,232 +903,216 @@ void backlight_task(void) { _SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF); #endif } - backlight_tick = (backlight_tick + 1) % 16; - #endif + backlight_tick = backlight_tick + 1 % 16; } #ifdef BACKLIGHT_BREATHING +#error "Backlight breathing only available with hardware PWM. Please disable." +#endif -#ifdef NO_BACKLIGHT_CLOCK -void breathing_defaults(void) {} -void breathing_intensity_default(void) {} -#else +#else // pwm through timer + +#define TIMER_TOP 0xFFFFU + +// See http://jared.geek.nz/2013/feb/linear-led-pwm +static uint16_t cie_lightness(uint16_t v) { + if (v <= 5243) // if below 8% of max + return v / 9; // same as dividing by 900% + else { + uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare + // to get a useful result with integer division, we shift left in the expression above + // and revert what we've done again after squaring. + y = y * y * y >> 8; + if (y > 0xFFFFUL) // prevent overflow + return 0xFFFFU; + else + return (uint16_t) y; + } +} + +// 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; +} + +__attribute__ ((weak)) +void backlight_set(uint8_t level) { + if (level > BACKLIGHT_LEVELS) + level = BACKLIGHT_LEVELS; + + if (level == 0) { + // Turn off PWM control on backlight pin + TCCR1A &= ~(_BV(COM1x1)); + } else { + // Turn on PWM control of backlight pin + TCCR1A |= _BV(COM1x1); + } + // Set the brightness + set_pwm(cie_lightness(TIMER_TOP * (uint32_t)level / BACKLIGHT_LEVELS)); +} + +void backlight_task(void) {} + +#ifdef BACKLIGHT_BREATHING #define BREATHING_NO_HALT 0 #define BREATHING_HALT_OFF 1 #define BREATHING_HALT_ON 2 +#define BREATHING_STEPS 128 -static uint8_t breath_intensity; -static uint8_t breath_speed; -static uint16_t breathing_index; -static uint8_t breathing_halt; +static uint8_t breathing_period = BREATHING_PERIOD; +static uint8_t breathing_halt = BREATHING_NO_HALT; +static uint16_t breathing_counter = 0; -void breathing_enable(void) -{ - if (get_backlight_level() == 0) - { - breathing_index = 0; - } - else - { - // Set breathing_index to be at the midpoint (brightest point) - breathing_index = 0x20 << breath_speed; - } +bool is_breathing(void) { + return !!(TIMSK1 & _BV(TOIE1)); +} - breathing_halt = BREATHING_NO_HALT; +#define breathing_interrupt_enable() do {TIMSK1 |= _BV(TOIE1);} while (0) +#define breathing_interrupt_disable() do {TIMSK1 &= ~_BV(TOIE1);} while (0) +#define breathing_min() do {breathing_counter = 0;} while (0) +#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0) - // Enable breathing interrupt - TIMSK1 |= _BV(OCIE1A); +void breathing_enable(void) +{ + breathing_counter = 0; + breathing_halt = BREATHING_NO_HALT; + breathing_interrupt_enable(); } void breathing_pulse(void) { if (get_backlight_level() == 0) - { - breathing_index = 0; - } + breathing_min(); else - { - // Set breathing_index to be at the midpoint + 1 (brightest point) - breathing_index = 0x21 << breath_speed; - } - + breathing_max(); breathing_halt = BREATHING_HALT_ON; - - // Enable breathing interrupt - TIMSK1 |= _BV(OCIE1A); + breathing_interrupt_enable(); } void breathing_disable(void) { - // Disable breathing interrupt - TIMSK1 &= ~_BV(OCIE1A); + breathing_interrupt_disable(); + // Restore backlight level backlight_set(get_backlight_level()); } void breathing_self_disable(void) { - if (get_backlight_level() == 0) - { - breathing_halt = BREATHING_HALT_OFF; - } - else - { - breathing_halt = BREATHING_HALT_ON; - } - - //backlight_set(get_backlight_level()); + if (get_backlight_level() == 0) + breathing_halt = BREATHING_HALT_OFF; + else + breathing_halt = BREATHING_HALT_ON; } -void breathing_toggle(void) -{ - if (!is_breathing()) - { - if (get_backlight_level() == 0) - { - breathing_index = 0; - } - else - { - // Set breathing_index to be at the midpoint + 1 (brightest point) - breathing_index = 0x21 << breath_speed; - } - - breathing_halt = BREATHING_NO_HALT; - } - - // Toggle breathing interrupt - TIMSK1 ^= _BV(OCIE1A); - - // Restore backlight level - if (!is_breathing()) - { - backlight_set(get_backlight_level()); - } +void breathing_toggle(void) { + if (is_breathing()) + breathing_disable(); + else + breathing_enable(); } -bool is_breathing(void) +void breathing_period_set(uint8_t value) { - return (TIMSK1 && _BV(OCIE1A)); + if (!value) + value = 1; + breathing_period = value; } -void breathing_intensity_default(void) -{ - //breath_intensity = (uint8_t)((uint16_t)100 * (uint16_t)get_backlight_level() / (uint16_t)BACKLIGHT_LEVELS); - breath_intensity = ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2)); +void breathing_period_default(void) { + breathing_period_set(BREATHING_PERIOD); } -void breathing_intensity_set(uint8_t value) +void breathing_period_inc(void) { - breath_intensity = value; + breathing_period_set(breathing_period+1); } -void breathing_speed_default(void) +void breathing_period_dec(void) { - breath_speed = 4; + breathing_period_set(breathing_period-1); } -void breathing_speed_set(uint8_t value) -{ - bool is_breathing_now = is_breathing(); - uint8_t old_breath_speed = breath_speed; - - if (is_breathing_now) - { - // Disable breathing interrupt - TIMSK1 &= ~_BV(OCIE1A); - } - - breath_speed = value; - - if (is_breathing_now) - { - // Adjust index to account for new speed - breathing_index = (( (uint8_t)( (breathing_index) >> old_breath_speed ) ) & 0x3F) << breath_speed; - - // Enable breathing interrupt - TIMSK1 |= _BV(OCIE1A); - } - -} +/* To generate breathing curve in python: + * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)] + */ +static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; -void breathing_speed_inc(uint8_t value) -{ - if ((uint16_t)(breath_speed - value) > 10 ) - { - breathing_speed_set(0); - } - else - { - breathing_speed_set(breath_speed - value); - } +// Use this before the cie_lightness function. +static inline uint16_t scale_backlight(uint16_t v) { + return v / BACKLIGHT_LEVELS * get_backlight_level(); } -void breathing_speed_dec(uint8_t value) +/* 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(TIMER1_OVF_vect) { - if ((uint16_t)(breath_speed + value) > 10 ) - { - breathing_speed_set(10); - } - else - { - breathing_speed_set(breath_speed + value); - } -} + 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; + + if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || + ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) + { + breathing_interrupt_disable(); + } -void breathing_defaults(void) -{ - breathing_intensity_default(); - breathing_speed_default(); - breathing_halt = BREATHING_NO_HALT; + set_pwm(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U))); } -/* Breathing Sleep LED brighness(PWM On period) table - * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle - * - * http://www.wolframalpha.com/input/?i=%28sin%28+x%2F64*pi%29**8+*+255%2C+x%3D0+to+63 - * (0..63).each {|x| p ((sin(x/64.0*PI)**8)*255).to_i } - */ -static const uint8_t breathing_table[64] PROGMEM = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 10, - 15, 23, 32, 44, 58, 74, 93, 113, 135, 157, 179, 199, 218, 233, 245, 252, -255, 252, 245, 233, 218, 199, 179, 157, 135, 113, 93, 74, 58, 44, 32, 23, - 15, 10, 6, 4, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -}; +#endif // BACKLIGHT_BREATHING -ISR(TIMER1_COMPA_vect) +__attribute__ ((weak)) +void backlight_init_ports(void) { - // OCR1x = (pgm_read_byte(&breathing_table[ ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F ] )) * breath_intensity; - - - uint8_t local_index = ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F; - - if (((breathing_halt == BREATHING_HALT_ON) && (local_index == 0x20)) || ((breathing_halt == BREATHING_HALT_OFF) && (local_index == 0x3F))) - { - // Disable breathing interrupt - TIMSK1 &= ~_BV(OCIE1A); - } - - OCR1x = (uint16_t)(((uint16_t)pgm_read_byte(&breathing_table[local_index]) * 257)) >> breath_intensity; + // 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 + // I could write a wall of text here to explain... but TL;DW + // Go read the ATmega32u4 datasheet. + // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on + + // 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.) + // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0 + // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1 + + /* + 14.8.3: + "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; + // Use full 16-bit resolution. Counter counts to ICR1 before reset to 0. + ICR1 = TIMER_TOP; + backlight_init(); + #ifdef BACKLIGHT_BREATHING + breathing_enable(); + #endif } -#endif // NO_BACKLIGHT_CLOCK -#endif // breathing +#endif // NO_HARDWARE_PWM #else // backlight __attribute__ ((weak)) -void backlight_init_ports(void) -{ - -} +void backlight_init_ports(void) {} __attribute__ ((weak)) -void backlight_set(uint8_t level) -{ - -} +void backlight_set(uint8_t level) {} #endif // backlight |