From 9c9d6c153154981fdedbe3f9ed4a1fb61e2b7776 Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@mit.edu>
Date: Tue, 31 Aug 2010 18:28:07 -0400
Subject: added support to enable/disable systick in wirish

---
 libmaple/systick.c | 6 ++++++
 libmaple/systick.h | 1 +
 2 files changed, 7 insertions(+)

(limited to 'libmaple')

diff --git a/libmaple/systick.c b/libmaple/systick.c
index 8b0d92a..456ac2f 100644
--- a/libmaple/systick.c
+++ b/libmaple/systick.c
@@ -52,6 +52,12 @@ void systick_init(uint32 reload_val) {
                          SYSTICK_TICKINT);
 }
 
+void systick_disable() {
+  /* clock the system timer with the core clock, but don't turn it on
+     or enable interrupt. */
+  __write(SYSTICK_CSR, SYSTICK_SRC_HCLK);
+}
+
 void SysTickHandler(void) {
     systick_timer_millis++;
 }
diff --git a/libmaple/systick.h b/libmaple/systick.h
index 57b724a..86284f8 100644
--- a/libmaple/systick.h
+++ b/libmaple/systick.h
@@ -43,6 +43,7 @@ extern "C"{
 #endif
 
 void systick_init(uint32 reload_val);
+void systick_disable();
 
 static inline uint32 systick_get_count(void) {
     return __read(SYSTICK_CNT);
-- 
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