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led_clock-old
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improve: set only LED if changed

This commit is contained in:
King Kévin 2016-03-26 14:58:21 +01:00
parent c8e5c4f7fd
commit 6edccc845d
1 changed files with 14 additions and 8 deletions
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22
main.c
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@ -206,23 +206,29 @@ static void clock_show_time(uint32_t time)
uint8_t brightness_second = (255*(time%ticks_second))/ticks_second; // get brightness for seconds
// set second LED
clock_leds[led_second*3+0] = brightness_second;
//clock_leds[led_second*3+1] = 0;
//clock_leds[led_second*3+2] = 0;
//clock_leds[led_second*3+1] = 0; // clear other colors (minutes/hours indication)
//clock_leds[led_second*3+2] = 0; // clear other colors (minutes/hours indication)
// set previous LED
led_second = (led_second==0) ? WS2812B_LEDS-1 : led_second-1; // previous LED
clock_leds[led_second*3+0] = 0xff-brightness_second;
//clock_leds[led_second*3+1] = 0;
//clock_leds[led_second*3+2] = 0;
//clock_leds[led_second*3+1] = 0; // clear other colors (minutes/hours indication)
//clock_leds[led_second*3+2] = 0; // clear other colors (minutes/hours indication)
}
/** @brief set the LEDs
* @details set the LED colors on WS2812b LEDs
* @note WS2812b LED color values need to be transmitted separately
*/
static void leds_set(void)
static void clock_leds_set(void)
{
static uint8_t clock_leds_old[WS2812B_LEDS*3] = {0}; // backup so to only set when value changed
for (uint16_t i=0; i<LENGTH(clock_leds)/3; i++) {
ws2812b_set_rgb(i,clock_leds[i*3+0],clock_leds[i*3+1],clock_leds[i*3+2]);
if (clock_leds[i*3+0]!=clock_leds_old[i*3+0] || clock_leds[i*3+1]!=clock_leds_old[i*3+1] || clock_leds[i*3+2]!=clock_leds_old[i*3+2]) { // only set when value changed (since this costs time)
clock_leds_old[i*3+0] = clock_leds[i*3+0]; // memorise change
clock_leds_old[i*3+1] = clock_leds[i*3+1]; // memorise change
clock_leds_old[i*3+2] = clock_leds[i*3+2]; // memorise change
ws2812b_set_rgb(i,clock_leds[i*3+0],clock_leds[i*3+1],clock_leds[i*3+2]); // set new value (this costs time)
}
}
}
@ -232,7 +238,7 @@ static void leds_set(void)
static void clock_set_time(uint32_t time)
{
clock_show_time(time); // set time
leds_set(); // set the colors of all LEDs
clock_leds_set(); // set the colors of all LEDs
ws2812b_transmit(); // transmit set color
}
@ -294,7 +300,7 @@ int main(void)
ws2812b_setup(); // setup WS2812b LEDs
clock_hours(); // show hour markers
clock_clear(); // clear all LEDs
leds_set(); // set the colors of all LEDs
clock_leds_set(); // set the colors of all LEDs
ws2812b_transmit(); // transmit set color
// setup RTC module