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-rw-r--r--keyboards/handwired/practice60/led.c220
1 files changed, 213 insertions, 7 deletions
diff --git a/keyboards/handwired/practice60/led.c b/keyboards/handwired/practice60/led.c
index f15baed169..a9ede5bbaa 100644
--- a/keyboards/handwired/practice60/led.c
+++ b/keyboards/handwired/practice60/led.c
@@ -18,34 +18,240 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "hal.h"
#include "backlight.h"
#include "led.h"
+#include "led_custom.h"
#include "printf.h"
+static void breathing_callback(PWMDriver *pwmp);
+
+static PWMConfig pwmCFG = {
+ 0xFFFF, /* PWM clock frequency */
+ 256, /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
+ NULL, /* No Callback */
+ {
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL}, /* Enable Channel 0 */
+ {PWM_OUTPUT_DISABLED, NULL},
+ {PWM_OUTPUT_DISABLED, NULL},
+ {PWM_OUTPUT_DISABLED, NULL}
+ },
+ 0, /* HW dependent part.*/
+ 0
+};
+
+static PWMConfig pwmCFG_breathing = {
+ 0xFFFF, /* 10kHz PWM clock frequency */
+ 256, /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
+ breathing_callback, /* Breathing Callback */
+ {
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL}, /* Enable Channel 0 */
+ {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
+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;
+ }
+}
+
+
void backlight_init_ports(void) {
printf("backlight_init_ports()\n");
#ifdef BACKLIGHT_ENABLE
- palSetPadMode(GPIOA, 8, PAL_MODE_OUTPUT_PUSHPULL);
- palSetPad(GPIOA, 8);
+
+ palSetPadMode(GPIOA, 8, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
+ pwmStart(&PWMD1, &pwmCFG);
+ pwmEnableChannel(&PWMD1, 0, PWM_FRACTION_TO_WIDTH(&PWMD1, 0xFFFF,cie_lightness(0xFFFF)));
#endif
}
void backlight_set(uint8_t level) {
printf("backlight_set(%d)\n", level);
#ifdef BACKLIGHT_ENABLE
+ uint32_t duty = (uint32_t)(cie_lightness(0xFFFF * (uint32_t) level / BACKLIGHT_LEVELS));
+ printf("duty: (%d)\n", duty);
if (level == 0) {
// Turn backlight off
- palSetPad(GPIOA, 8);
+ pwmDisableChannel(&PWMD1, 0);
} else {
- // Turn backlight on
- palClearPad(GPIOA, 8);
+ // Turn backlight on
+ if(!is_breathing()){
+ pwmEnableChannel(&PWMD1, 0, PWM_FRACTION_TO_WIDTH(&PWMD1,0xFFFF,duty));
+ }
}
#endif
}
+
+uint8_t backlight_tick = 0;
+
+void backlight_task(void) {
+}
+
+#define BREATHING_NO_HALT 0
+#define BREATHING_HALT_OFF 1
+#define BREATHING_HALT_ON 2
+#define BREATHING_STEPS 128
+
+static uint8_t breathing_period = BREATHING_PERIOD;
+static uint8_t breathing_halt = BREATHING_NO_HALT;
+static uint16_t breathing_counter = 0;
+
+bool is_breathing(void) {
+ return PWMD1.config == &pwmCFG_breathing;
+}
+
+#define breathing_min() do {breathing_counter = 0;} while (0)
+#define breathing_max() do {breathing_counter = breathing_period * 256 / 2;} while (0)
+
+
+void breathing_interrupt_enable(void){
+ pwmStop(&PWMD1);
+ printf("starting with callback\n");
+ pwmStart(&PWMD1, &pwmCFG_breathing);
+ chSysLockFromISR();
+ pwmEnablePeriodicNotification(&PWMD1);
+ pwmEnableChannelI(
+ &PWMD1,
+ 0,
+ PWM_FRACTION_TO_WIDTH(
+ &PWMD1,
+ 0xFFFF,
+ 0xFFFF
+ )
+ );
+ chSysUnlockFromISR();
+}
+
+void breathing_interrupt_disable(void){
+ pwmStop(&PWMD1);
+ printf("starting without callback\n");
+ pwmStart(&PWMD1, &pwmCFG);
+}
+
+void breathing_enable(void)
+{
+ printf("breathing_enable()\n");
+ 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;
+}
+
+void breathing_toggle(void) {
+ if (is_breathing()){
+ printf("disable breathing\n");
+ breathing_disable();
+ } else {
+ printf("enable breathing\n");
+ breathing_enable();
+ }
+}
+
+void breathing_period_set(uint8_t value)
+{
+ if (!value)
+ value = 1;
+ breathing_period = value;
+}
+
+void breathing_period_default(void) {
+ breathing_period_set(BREATHING_PERIOD);
+}
+
+void breathing_period_inc(void)
+{
+ breathing_period_set(breathing_period+1);
+}
+
+void breathing_period_dec(void)
+{
+ breathing_period_set(breathing_period-1);
+}
+
+/* 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};
+
+// 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(PWMDriver *pwmp)
+{
+ (void)pwmp;
+ uint16_t interval = (uint16_t) breathing_period * 256 / BREATHING_STEPS;
+ // resetting after one period to prevent ugly reset at overflow.
+ 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)))
+ {
+ breathing_interrupt_disable();
+ }
+
+ uint32_t duty = cie_lightness(scale_backlight(breathing_table[index] * 256));
+
+ chSysLockFromISR();
+ pwmEnableChannelI(
+ &PWMD1,
+ 0,
+ PWM_FRACTION_TO_WIDTH(
+ &PWMD1,
+ 0xFFFF,
+ duty
+ )
+ );
+ chSysUnlockFromISR();
+}
+
+
void led_set(uint8_t usb_led)
{
if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
- palClearPad(GPIOC, 13);
+ palSetPad(GPIOC, 13);
} else {
- palSetPad(GPIOC, 13);
+ palClearPad(GPIOC, 13);
}
}