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Refactor ARM backlight (#7959)

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Joel Challis 2020-07-10 09:12:40 +01:00 committed by GitHub
parent c272b2422b
commit aec4125989
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1 changed files with 68 additions and 106 deletions
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174
quantum/backlight/backlight_chibios.c
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@ -3,27 +3,37 @@
#include <hal.h> #include <hal.h>
#include "debug.h" #include "debug.h"
// TODO: remove short term bodge when refactoring BACKLIGHT_CUSTOM_DRIVER out
#ifdef BACKLIGHT_PIN
// GPIOV2 && GPIOV3 // GPIOV2 && GPIOV3
# ifndef BACKLIGHT_PAL_MODE #ifndef BACKLIGHT_PAL_MODE
# define BACKLIGHT_PAL_MODE 2 # define BACKLIGHT_PAL_MODE 2
# endif #endif
// GENERIC // GENERIC
# ifndef BACKLIGHT_PWM_DRIVER #ifndef BACKLIGHT_PWM_DRIVER
# define BACKLIGHT_PWM_DRIVER PWMD4 # define BACKLIGHT_PWM_DRIVER PWMD4
# endif #endif
# ifndef BACKLIGHT_PWM_CHANNEL #ifndef BACKLIGHT_PWM_CHANNEL
# define BACKLIGHT_PWM_CHANNEL 3 # define BACKLIGHT_PWM_CHANNEL 3
# endif #endif
static void breathing_callback(PWMDriver *pwmp); // 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
static PWMConfig pwmCFG = {0xFFFF, /* PWM clock frequency */ static PWMConfig pwmCFG = {0xFFFF, /* PWM clock frequency */
256, /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */ 256, /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
NULL, /* No Callback */ NULL, /* Breathing Callback */
{ /* Default all channels to disabled - Channels will be configured durring init */ { /* Default all channels to disabled - Channels will be configured durring init */
{PWM_OUTPUT_DISABLED, NULL}, {PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL}, {PWM_OUTPUT_DISABLED, NULL},
@ -32,17 +42,6 @@ static PWMConfig pwmCFG = {0xFFFF, /* PWM clock frequency */
0, /* HW dependent part.*/ 0, /* HW dependent part.*/
0}; 0};
static PWMConfig pwmCFG_breathing = {0xFFFF, /** PWM clock frequency */
256, /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
breathing_callback, /* Breathing Callback */
{ /* Default all channels to disabled - Channels will be configured durring init */
{PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL}},
0, /* HW dependent part.*/
0};
// See http://jared.geek.nz/2013/feb/linear-led-pwm // See http://jared.geek.nz/2013/feb/linear-led-pwm
static uint16_t cie_lightness(uint16_t v) { static uint16_t cie_lightness(uint16_t v) {
if (v <= 5243) // if below 8% of max if (v <= 5243) // if below 8% of max
@ -60,125 +59,88 @@ static uint16_t cie_lightness(uint16_t v) {
} }
void backlight_init_ports(void) { void backlight_init_ports(void) {
// printf("backlight_init_ports()\n"); #ifdef USE_GPIOV1
# ifdef USE_GPIOV1
palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL); palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
# else #else
palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), PAL_MODE_ALTERNATE(BACKLIGHT_PAL_MODE)); palSetPadMode(PAL_PORT(BACKLIGHT_PIN), PAL_PAD(BACKLIGHT_PIN), PAL_MODE_ALTERNATE(BACKLIGHT_PAL_MODE));
# endif #endif
pwmCFG.channels[BACKLIGHT_PWM_CHANNEL - 1].mode = PWM_OUTPUT_ACTIVE_HIGH; pwmCFG.channels[BACKLIGHT_PWM_CHANNEL - 1].mode = PWM_OUTPUT_MODE;
pwmCFG_breathing.channels[BACKLIGHT_PWM_CHANNEL - 1].mode = PWM_OUTPUT_ACTIVE_HIGH;
pwmStart(&BACKLIGHT_PWM_DRIVER, &pwmCFG); pwmStart(&BACKLIGHT_PWM_DRIVER, &pwmCFG);
backlight_set(get_backlight_level()); backlight_set(get_backlight_level());
#ifdef BACKLIGHT_BREATHING
if (is_backlight_breathing()) { if (is_backlight_breathing()) {
breathing_enable(); breathing_enable();
} }
#endif
} }
void backlight_set(uint8_t level) { void backlight_set(uint8_t level) {
// printf("backlight_set(%d)\n", level); if (level > BACKLIGHT_LEVELS) level = BACKLIGHT_LEVELS;
if (level == 0) { if (level == 0) {
// Turn backlight off // Turn backlight off
pwmDisableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1); pwmDisableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1);
} else { } else {
// Turn backlight on // Turn backlight on
if (!is_breathing()) { uint32_t duty = (uint32_t)(cie_lightness(0xFFFF * (uint32_t)level / BACKLIGHT_LEVELS));
uint32_t duty = (uint32_t)(cie_lightness(0xFFFF * (uint32_t)level / BACKLIGHT_LEVELS)); pwmEnableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty));
// printf("duty: (%d)\n", duty);
pwmEnableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty));
}
} }
} }
uint8_t backlight_tick = 0;
void backlight_task(void) {} void backlight_task(void) {}
# define BREATHING_NO_HALT 0 #ifdef BACKLIGHT_BREATHING
# define BREATHING_HALT_OFF 1
# define BREATHING_HALT_ON 2
# define BREATHING_STEPS 128 # define BREATHING_STEPS 128
static uint8_t breathing_halt = BREATHING_NO_HALT;
static uint16_t breathing_counter = 0;
bool is_breathing(void) { return BACKLIGHT_PWM_DRIVER.config == &pwmCFG_breathing; }
static inline void breathing_min(void) { breathing_counter = 0; }
static inline void breathing_max(void) { breathing_counter = get_breathing_period() * 256 / 2; }
void breathing_interrupt_enable(void) {
pwmStop(&BACKLIGHT_PWM_DRIVER);
pwmStart(&BACKLIGHT_PWM_DRIVER, &pwmCFG_breathing);
chSysLockFromISR();
pwmEnablePeriodicNotification(&BACKLIGHT_PWM_DRIVER);
pwmEnableChannelI(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, 0xFFFF));
chSysUnlockFromISR();
}
void breathing_interrupt_disable(void) {
pwmStop(&BACKLIGHT_PWM_DRIVER);
pwmStart(&BACKLIGHT_PWM_DRIVER, &pwmCFG);
}
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_min();
else
breathing_max();
breathing_halt = BREATHING_HALT_ON;
breathing_interrupt_enable();
}
void breathing_disable(void) {
// printf("breathing_disable()\n");
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;
}
/* To generate breathing curve in python: /* To generate breathing curve in python:
* from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)] * 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 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};
void breathing_callback(PWMDriver *pwmp);
bool is_breathing(void) { return pwmCFG.callback != NULL; }
void breathing_enable(void) {
pwmCFG.callback = breathing_callback;
pwmEnablePeriodicNotification(&BACKLIGHT_PWM_DRIVER);
}
void breathing_disable(void) {
pwmCFG.callback = NULL;
pwmDisablePeriodicNotification(&BACKLIGHT_PWM_DRIVER);
// Restore backlight level
backlight_set(get_backlight_level());
}
// Use this before the cie_lightness function. // Use this before the cie_lightness function.
static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); } static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); }
static void breathing_callback(PWMDriver *pwmp) { void breathing_callback(PWMDriver *pwmp) {
(void)pwmp;
uint8_t breathing_period = get_breathing_period(); uint8_t breathing_period = get_breathing_period();
uint16_t interval = (uint16_t)breathing_period * 256 / BREATHING_STEPS; uint16_t interval = (uint16_t)breathing_period * 256 / 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) % (breathing_period * 256); static uint16_t breathing_counter = 0;
uint8_t index = breathing_counter / interval % BREATHING_STEPS; breathing_counter = (breathing_counter + 1) % (breathing_period * 256);
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))) { uint32_t duty = cie_lightness(scale_backlight(breathing_table[index] * 256));
breathing_interrupt_disable();
}
uint32_t duty = cie_lightness(scale_backlight(breathing_table[index] * 256));
chSysLockFromISR(); chSysLockFromISR();
pwmEnableChannelI(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty)); pwmEnableChannelI(pwmp, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty));
chSysUnlockFromISR(); 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 #endif