1 files changed, 38 insertions, 0 deletions
diff --git a/source/tests/led.c b/source/tests/led.c
new file mode 100644
index 0000000..82913ae
--- /dev/null
+++ b/source/tests/led.c
@@ -0,0 +1,38 @@
+#define ET_TEST_IMPL
+#include "../test.h"
+#include <inttypes.h>
+
+static int flash_led_tick(const struct et_state *state, void *data, struct et_next_state *next_state) {
+  struct et_test_state_private_base *priv = data;
+  struct et_test_plan *plan = priv->plan;
+  struct et_test_plan_entry *cur = test_current(plan);
+  et_test_status status = TEST_PASS;
+
+  for (int i = 0; i < 1024; ++i) {
+    u16 cmd_orig, cmd;
+
+    if (i & 1) {
+      /* LED off */
+      cmd_orig = 0x7000;
+    } else {
+      /* LED on */
+      cmd_orig = 0x8000;
+    }
+
+    cmd = cmd_orig;
+    if ((status = test_exi_readwrite(plan, &cmd, sizeof(cmd), TEST_EPRIV_BASE)) != TEST_PASS) {
+      break;
+    }
+
+    if (cmd != 0x0000) {
+      status = TEST_FAIL;
+      test_plan_entry_set_error(cur, "spurious response to 0x%04" PRIx16 ": 0x%04" PRIx16 " (should be 0x0000)", cmd_orig, cmd);
+      break;
+    }
+  }
+
+  cur->status = status;
+  return test_next(plan, next_state);
+}
+
+TEST_DEF(flash_led, "Flash LED", 0, NULL, flash_led_tick, NULL, struct et_test_state_private_base);