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software/zig_main/main/app.zig

@@ -3,11 +3,73 @@ const builtin = @import("builtin");
 const idf = @import("esp_idf");
 const ver = idf.ver.Version;
 const mem = std.mem;
+const led = idf.led;
 
 comptime {
     @export(&main, .{ .name = "app_main" });
 }
 
+const LED_STRIP_USE_DMA = false;
+const LED_STRIP_LED_COUNT = 5;
+const LED_STRIP_MEMORY_BLOCK_WORDS = 0;
+const LED_STRIP_GPIO_PIN = 38;
+
+fn configureLED() !led.LedStripHandle {
+    // LED strip general initialization using wrapped types
+    const strip_config = led.LedStripConfig.ws2812(LED_STRIP_GPIO_PIN, LED_STRIP_LED_COUNT);
+
+    // LED strip backend configuration: RMT
+    var rmt_config = led.LedStripRmtConfig.default;
+    rmt_config.mem_block_symbols = LED_STRIP_MEMORY_BLOCK_WORDS;
+
+    if (LED_STRIP_USE_DMA) {
+        // Set DMA flag if needed
+        rmt_config.flags = 1; // with_dma bit
+    }
+
+    var led_strip: led.LedStripHandle = null;
+    const strip = try led.newRmtDevice(&strip_config, &rmt_config, &led_strip);
+
+    log.info("Created LED strip object with RMT backend", .{});
+    return strip;
+}
+
+fn ledStripTask(led_strip_ptr: ?*anyopaque) callconv(.c) void {
+    const led_strip: led.LedStripHandle = @ptrCast(@alignCast(led_strip_ptr.?));
+    var led_on_off = false;
+
+    log.info("Start blinking LED strip", .{});
+
+    while (true) {
+        if (led_on_off) {
+            // Set the LED pixel using RGB from 0 (0%) to 255 (100%) for each color
+            var i: u32 = 0;
+            while (i < LED_STRIP_LED_COUNT) : (i += 1) {
+                led.setPixel(led_strip, i, 5, 5, 5) catch |err| {
+                    log.err("Failed to set LED pixel {}: {s}", .{ i, @errorName(err) });
+                };
+            }
+
+            // Refresh the strip to send data
+            led.refresh(led_strip) catch |err| {
+                log.err("Failed to refresh LED strip: {s}", .{@errorName(err)});
+            };
+
+            log.info("LED ON!", .{});
+        } else {
+            // Set all LED off to clear all pixels
+            led.clear(led_strip) catch |err| {
+                log.err("Failed to clear LED strip: {s}", .{@errorName(err)});
+            };
+
+            log.info("LED OFF!", .{});
+        }
+
+        led_on_off = !led_on_off;
+        idf.rtos.Task.delayMs(500);
+    }
+}
+
 fn main() callconv(.c) void {
     // This allocator is safe to use as the backing allocator w/ arena allocator
 
@@ -57,13 +119,19 @@ fn main() callconv(.c) void {
         log.err("Error: {s}", .{@errorName(err)});
     };
 
+    // Configure and initialize LED strip
+    const led_strip = configureLED() catch |err| {
+        log.err("Failed to configure LED strip: {s}", .{@errorName(err)});
+        @panic("LED strip initialization failed");
+    };
+
     if (builtin.mode == .Debug)
         heap.dump();
 
     // FreeRTOS Tasks — Task.create returns !Handle; on failure panic with a clear message.
+    _ = idf.rtos.Task.create(ledStripTask, "led_strip", 1024 * 4, led_strip, 5) catch @panic("Error: LED strip task not created!");
     _ = idf.rtos.Task.create(fooTask, "foo", 1024 * 3, null, 1) catch @panic("Task foo not created");
     _ = idf.rtos.Task.create(barTask, "bar", 1024 * 3, null, 2) catch @panic("Task bar not created");
-    _ = idf.rtos.Task.create(blinkTask, "blink", 1024 * 2, null, 5) catch @panic("Task blink not created");
 }
 
 fn blinkLED(delay_ms: u32) !void {