AP_HAL_AVR: Blink sketch - first working code on coreless

libraries/AP_HAL_AVR/examples/Blink/Blink.pde

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+
+#include <AP_Common.h>
+#include <AP_HAL.h>
+#include <AP_HAL_AVR.h>
+
+const AP_HAL::HAL& hal = AP_HAL_AVR_APM1;
+
+void loop (void) {
+    hal.scheduler->delay(1000);
+    hal.gpio->write(13, 1);
+    hal.scheduler->delay(1000);
+    hal.gpio->write(13, 0);
+}
+
+void setup (void) {
+    hal.gpio->pinMode(13, GPIO_OUTPUT);
+    hal.gpio->write(13, 0);
+}
+
+
+extern "C" {
+int main (void) {
+    hal.init(NULL);
+    setup();
+    for(;;) loop();
+    return 0;
+}
+}

libraries/AP_HAL_AVR/examples/Blink/Makefile

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+include ../../../AP_Common/Arduino.mk