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Rescale both ChibiOS and AVR backlighting.

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Nick Brassel 2020-09-07 11:05:50 +10:00 • committed by James Young
parent c4ecae1d77
commit f22a61e7e9
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GPG key ID: 8E1085BF6FCFBD74
3 changed files with 33 additions and 12 deletions
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14
quantum/backlight/backlight_chibios.c
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@ -3,6 +3,11 @@
#include <hal.h>
#include "debug.h"
// Maximum duty cycle limit
#ifndef BACKLIGHT_LIMIT_VAL
# define BACKLIGHT_LIMIT_VAL 255
#endif
// GPIOV2 && GPIOV3
#ifndef BACKLIGHT_PAL_MODE
# define BACKLIGHT_PAL_MODE 2
@ -58,6 +63,11 @@ static uint16_t cie_lightness(uint16_t v) {
}
}
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), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
@ -85,7 +95,7 @@ void backlight_set(uint8_t level) {
pwmDisableChannel(&BACKLIGHT_PWM_DRIVER, BACKLIGHT_PWM_CHANNEL - 1);
} else {
// Turn backlight on
uint32_t duty = (uint32_t)(cie_lightness(0xFFFF * (uint32_t)level / BACKLIGHT_LEVELS));
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));
}
}
@ -129,7 +139,7 @@ void breathing_callback(PWMDriver *pwmp) {
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(scale_backlight(breathing_table[index] * 256));
uint32_t duty = cie_lightness(rescale_limit_val(scale_backlight(breathing_table[index] * 256)));
chSysLockFromISR();
pwmEnableChannelI(pwmp, BACKLIGHT_PWM_CHANNEL - 1, PWM_FRACTION_TO_WIDTH(&BACKLIGHT_PWM_DRIVER, 0xFFFF, duty));