Make FreeRTOS changes comply with the coding standard.

Don't modify the core FreeRTOS code; only change source that's
specific to libmaple.

1 files changed, 4 insertions, 2 deletions

diff --git a/libmaple/systick.c b/libmaple/systick.c
index 388f7aa..5025328 100644
--- a/libmaple/systick.c
+++ b/libmaple/systick.c
@@ -66,7 +66,9 @@ void systick_enable() {
 }
 
 /**
- * Attach a callback called each ms.
+ * @brief Attach a callback to be called from the SysTick exception handler.
+ *
+ * To detach a callback, call this function again with a null argument.
  */
 void systick_attach_callback(void (*callback)(void)) {
     systick_user_callback = callback;
@@ -77,7 +79,7 @@ void systick_attach_callback(void (*callback)(void)) {
  */
 
 void __exc_systick(void) {
-	if (systick_user_callback) {
+    if (systick_user_callback) {
         systick_user_callback();
     }
     systick_uptime_millis++;