Update to ws2812 driver (internal behavior only)

diff --git a/extdrv/ws2812.c b/extdrv/ws2812.c
index ee67d6d..4c0c300 100644 (file)
--- a/extdrv/ws2812.c
+++ b/extdrv/ws2812.c
@@ -45,7 +45,7 @@ void ws2812_config(const struct pio* gpio)
 }
 
 static uint8_t led_data[NB_LEDS * 3];
-static int16_t max_led = -1;
+static uint16_t max_led = 0;
 static uint32_t nb_bytes = 0;
 
 
@@ -133,12 +133,7 @@ int ws2812_send_frame(uint16_t nb_leds)
                return -1;
        }
        if (nb_leds == 0) {
-               if (max_led == -1) {
-                       return 0;
-               }
                nb_leds = max_led;
-               /* All leds set previously will be sent, back to no leds set */
-               max_led = -1;
        }
        nb_bytes = (nb_leds + 1) * 3;
        ws2812_bit_sender();
@@ -177,7 +172,7 @@ int ws2812_get_pixel(uint16_t pixel_num, uint8_t* red, uint8_t* green, uint8_t*
 void ws2812_clear_buffer(void)
 {
        memset(led_data, 0, (NB_LEDS * 3));
-       max_led = -1;
+       max_led = 0;
 }
 
 /* Clear the internal data buffer and send it to the Leds, turning them all off */
@@ -186,7 +181,7 @@ void ws2812_clear(void)
        /* Start at first led and send all leds off */
        ws2812_clear_buffer();
        ws2812_send_frame(NB_LEDS);
-       max_led = -1;
+       max_led = 0;
 }
 
 void ws2812_stop(void) __attribute__ ((alias ("ws2812_clear")));