first and working ethernet

barnum-initial.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "pico/stdlib.h"
+#include "hardware/pio.h"
+#include "hardware/clocks.h"
+#include "ws2812.pio.h"
+
+void put_pixel(uint32_t pixel_grb)
+{
+    pio_sm_put_blocking(pio0, 0, pixel_grb << 8u);
+}
+void put_rgb(uint8_t red, uint8_t green, uint8_t blue)
+{
+    uint32_t mask = (green << 16) | (red << 8) | (blue << 0);
+    put_pixel(mask);
+}
+
+int main()
+{
+    //set_sys_clock_48();
+    stdio_init_all();
+
+    PIO pio = pio0;
+    int sm = 0;
+    uint offset = pio_add_program(pio, &ws2812_program);
+    uint8_t cnt = 0;
+
+    puts("RP2040-Zero WS2812 Test");
+
+    ws2812_program_init(pio, sm, offset, 25, 800000, true);
+
+    while (1)
+    {
+        for (cnt = 0; cnt < 0xff; cnt++)
+        {
+            put_rgb(cnt, 0xff - cnt, 0);
+            sleep_ms(3);
+        }
+        for (cnt = 0; cnt < 0xff; cnt++)
+        {
+            put_rgb(0xff - cnt, 0, cnt);
+            sleep_ms(3);
+        }
+        for (cnt = 0; cnt < 0xff; cnt++)
+        {
+            put_rgb(0, cnt, 0xff - cnt);
+            sleep_ms(3);
+        }
+    }
+}