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Diffstat (limited to 'quantum/backlight/backlight_chibios.c')
| -rw-r--r-- | quantum/backlight/backlight_chibios.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/quantum/backlight/backlight_chibios.c b/quantum/backlight/backlight_chibios.c deleted file mode 100644 index 30e95bd5c8..0000000000 --- a/quantum/backlight/backlight_chibios.c +++ /dev/null @@ -1,173 +0,0 @@ -#include "quantum.h" -#include "backlight.h" -#include <hal.h> -#include "debug.h" - -// Maximum duty cycle limit -#ifndef BACKLIGHT_LIMIT_VAL -# define BACKLIGHT_LIMIT_VAL 255 -#endif - -#ifndef BACKLIGHT_PAL_MODE -# if defined(USE_GPIOV1) -# define BACKLIGHT_PAL_MODE PAL_MODE_ALTERNATE_PUSHPULL -# else -// GPIOV2 && GPIOV3 -# define BACKLIGHT_PAL_MODE 5 -# endif -#endif - -// GENERIC -#ifndef BACKLIGHT_PWM_DRIVER -# define BACKLIGHT_PWM_DRIVER PWMD4 -#endif -#ifndef BACKLIGHT_PWM_CHANNEL -# define BACKLIGHT_PWM_CHANNEL 3 -#endif - -// Support for pins which are on TIM1_CH1N - requires STM32_PWM_USE_ADVANCED -#ifdef BACKLIGHT_PWM_COMPLEMENTARY_OUTPUT -# if BACKLIGHT_ON_STATE == 1 -# define PWM_OUTPUT_MODE PWM_COMPLEMENTARY_OUTPUT_ACTIVE_LOW; -# else -# define PWM_OUTPUT_MODE PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH; -# endif -#else -# if BACKLIGHT_ON_STATE == 1 -# define PWM_OUTPUT_MODE PWM_OUTPUT_ACTIVE_HIGH; -# else -# define PWM_OUTPUT_MODE PWM_OUTPUT_ACTIVE_LOW; -# endif -#endif - -#ifndef BACKLIGHT_PWM_COUNTER_FREQUENCY -# define BACKLIGHT_PWM_COUNTER_FREQUENCY 0xFFFF -#endif - -#ifndef BACKLIGHT_PWM_PERIOD -# define BACKLIGHT_PWM_PERIOD 256 -#endif - -static PWMConfig pwmCFG = { - .frequency = BACKLIGHT_PWM_COUNTER_FREQUENCY, /* PWM clock frequency */ - .period = BACKLIGHT_PWM_PERIOD, /* PWM period in counter ticks. e.g. clock frequency is 10KHz, period is 256 ticks then t_period is 25.6ms */ -}; - -#ifdef BACKLIGHT_BREATHING -static virtual_timer_t breathing_vt; -#endif - -// 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; - } - } -} - -static uint32_t rescale_limit_val(uint32_t val) { - // rescale the supplied backlight value to be in terms of the value limit - return (val * (BACKLIGHT_LIMIT_VAL + 1)) / 256; -} - -void backlight_init_ports(void) { -#ifdef USE_GPIOV1 - palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), BACKLIGHT_PAL_MODE); -#else - palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), PAL_MODE_ALTERNATE(BACKLIGHT_PAL_MODE)); -#endif - - pwmCFG.channels[BACKLIGHT_PWM_CHANNEL - 1].mode = PWM_OUTPUT_MODE; - pwmStart(&BACKLIGHT_PWM_DRIVER, &pwmCFG); - - backlight_set(get_backlight_level()); - -#ifdef BACKLIGHT_BREATHING - chVTObjectInit(&breathing_vt); - if (is_backlight_breathing()) { - breathing_enable(); - } -#endif -} - -void backlight_set(uint8_t level) { - if (level > BACKLIGHT_LEVELS) { - level = BACKLIGHT_LEVELS; - } - - if (level == 0) { - // Turn backlight off - pwmDisableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1); - } else { - // Turn backlight on - uint32_t duty = (uint32_t)(cie_lightness(rescale_limit_val(0xFFFF * (uint32_t)level / BACKLIGHT_LEVELS))); - pwmEnableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty)); - } -} - -void backlight_task(void) {} - -#ifdef BACKLIGHT_BREATHING - -# define BREATHING_STEPS 128 - -/* 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] = {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}; - -static void breathing_callback(virtual_timer_t *vtp, void *p); - -bool is_breathing(void) { - return chVTIsArmed(&breathing_vt); -} - -void breathing_enable(void) { - /* Update frequency is 256Hz -> 3906us intervals */ - chVTSetContinuous(&breathing_vt, TIME_US2I(3906), breathing_callback, NULL); -} - -void breathing_disable(void) { - chVTReset(&breathing_vt); - - // Restore backlight level - backlight_set(get_backlight_level()); -} - -// Use this before the cie_lightness function. -static inline uint16_t scale_backlight(uint16_t v) { - return v / BACKLIGHT_LEVELS * get_backlight_level(); -} - -static void breathing_callback(virtual_timer_t *vtp, void *p) { - uint8_t breathing_period = get_breathing_period(); - uint16_t interval = (uint16_t)breathing_period * 256 / BREATHING_STEPS; - - // resetting after one period to prevent ugly reset at overflow. - static uint16_t breathing_counter = 0; - breathing_counter = (breathing_counter + 1) % (breathing_period * 256); - uint8_t index = breathing_counter / interval % BREATHING_STEPS; - uint32_t duty = cie_lightness(rescale_limit_val(scale_backlight(breathing_table[index] * 256))); - - chSysLockFromISR(); - pwmEnableChannelI(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty)); - chSysUnlockFromISR(); -} - -// TODO: integrate generic pulse solution -void breathing_pulse(void) { - backlight_set(is_backlight_enabled() ? 0 : BACKLIGHT_LEVELS); - wait_ms(10); - backlight_set(is_backlight_enabled() ? get_backlight_level() : 0); -} - -#endif |