update led tester

non_catalog_apps/ws2812b_tester/README.md

@@ -23,6 +23,8 @@ This application has three submenu items:
 The "About" menu item contains information about the application.
 
 # Updates
+- Version 1.9
+  - Use logic LOW instead of HIGH as resting state.  Fixes first LED was "laggy" issue.
 - Version 1.8
   - Renamed app to fit on Flipper Zero main menu screen
   - Improved initialization to only happen when configuring the LEDs

non_catalog_apps/ws2812b_tester/application.fam

@@ -3,7 +3,7 @@ App(
     name="[WS2812B] LED Tester",
     apptype=FlipperAppType.EXTERNAL,
     entry_point="ws2812b_led_tester_app",
-    fap_version=(1, 8),
+    fap_version=(1, 9),
     stack_size=4 * 1024,
     requires=[
         "gui",

non_catalog_apps/ws2812b_tester/led_driver.c

@@ -23,6 +23,7 @@
 #define LED_DRIVER_T0L 850U
 #define LED_DRIVER_T1L 450U
 #define LED_DRIVER_TRESETL 55 * 1000U
+#define LED_DRIVER_TDONE 2000U
 
 // Wait for 35ms for the DMA to complete. NOTE: 1000 leds*(850ns+450ns)*24 = 32ms
 #define LED_DRIVER_SETINEL_WAIT_MS 35
@@ -250,18 +251,18 @@ void led_driver_transmit(LedDriver* led_driver, bool transmit_if_clean) {
     const uint32_t bit_set = led_driver->gpio->pin << GPIO_BSRR_BS0_Pos;
     const uint32_t bit_reset = led_driver->gpio->pin << GPIO_BSRR_BR0_Pos;
 
-    // Always start with LOW (reset)
-    led_driver->gpio_buf[0] = bit_reset;
-    led_driver->gpio_buf[1] = bit_set;
+    // Our initial state is LOW, so first pulse is HIGH (set)
+    led_driver->gpio_buf[0] = bit_set;
+    led_driver->gpio_buf[1] = bit_reset;
 
     for(size_t i = 0; i < LED_DRIVER_BUFFER_SIZE; i++) {
         led_driver->timer_buffer[i] = LED_DRIVER_TIMER_SETINEL;
     }
 
-    led_driver_add_period(led_driver, LED_DRIVER_TRESETL);
     for(size_t i = 0; i < led_driver->count_leds; i++) {
         led_driver_add_color(led_driver, led_driver->led_data[i]);
     }
+    led_driver_add_period(led_driver, LED_DRIVER_TDONE);
     led_driver->dma_led_transition_timer.NbData = led_driver->write_pos + 1;
 
     FURI_CRITICAL_ENTER();