Add Fallback controller_clear

invalidflaw · Oct 10, 2019 · 4de3a0a · 4de3a0a
1 parent 59bde8f
commit 4de3a0a
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Showing 3 changed files with 14 additions and 3 deletions.
diff --git a/include/pros/misc.h b/include/pros/misc.h
@@ -337,7 +337,8 @@ int32_t controller_clear_line(controller_id_e_t id, uint8_t line);
  * Clears all of the lines on the controller screen.
  *
  * \note Controller text setting is currently in beta, so continuous, fast
- * updates will not work well.
+ * updates will not work well. On vexOS version 1.0.0 this function will block
+ * for 110ms.
  *
  * This function uses the following values of errno when an error state is
  * reached:

diff --git a/include/pros/misc.hpp b/include/pros/misc.hpp
@@ -241,7 +241,8 @@ class Controller {
 	 * Clears all of the lines on the controller screen.
 	 *
 	 * \note Controller text setting is currently in beta, so continuous, fast
-	 * updates will not work well.
+	 * updates will not work well. On vexOS version 1.0.0 this function will
+	 * block for 110ms.
 	 *
 	 * This function uses the following values of errno when an error state is
 	 * reached:

diff --git a/src/devices/controller.c b/src/devices/controller.c
@@ -289,7 +289,16 @@ int32_t controller_clear_line(controller_id_e_t id, uint8_t line) {
 }
 
 int32_t controller_clear(controller_id_e_t id) {
-	return controller_print(id, 0, 0, "");
+	if (vexSystemVersion() > 0x01000000) {
+		return controller_print(id, 0, 0, "");
+	} else {
+		for (int i = 0; i < 3; i++) {
+			int32_t rtn = controller_clear_line(id, i);
+			if (rtn == PROS_ERR) return PROS_ERR;
+			if (i != 2) delay(55);
+		}
+		return 1;
+	}
 }
 
 int32_t controller_rumble(controller_id_e_t id, const char* rumble_pattern) {