Diff: systick.h

Revision:

1:bc492a93e116

diff -r 7a91348b4a02 -r bc492a93e116 systick.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/systick.h	Sun Jul 17 16:03:50 2011 +0000
@@ -0,0 +1,56 @@
+/* Copyright (C) 2011 by Ivo van Poorten <ivop@euronet.nl>
+ * This file is licensed under the terms of the GNU Lesser
+ * General Public License, version 3.
+ */
+
+#ifndef FASTLIB_SYSTICK_H
+#define FASTLIB_SYSTICK_H
+
+#include "fastlib/common.h"
+
+#define FL_STCTRL       ((volatile uint32_t *) 0xE000E010)
+#define FL_STRELOAD     ((volatile uint32_t *) 0xE000E014)
+#define FL_STCURR       ((volatile uint32_t *) 0xE000E018)
+#define FL_STCALIB      ((volatile uint32_t *) 0xE000E01C)
+
+static inline void fl_systick_control(const unsigned enable,
+                                      const unsigned interrupt_enable,
+                                      const unsigned use_cpu_clock) {
+    *FL_STCTRL = enable | (interrupt_enable<<1) | (use_cpu_clock<<2);
+}
+
+static inline unsigned fl_systick_get_counter_flag(void) {
+    return *FL_STCTRL & (1U<<16);
+}
+
+static inline void fl_systick_set_reload_value(const unsigned value) {
+    *FL_STRELOAD = value;
+}
+
+static inline unsigned fl_systick_get_reload_value(void) {
+    return *FL_STRELOAD;
+}
+
+static inline unsigned fl_systick_get_current_value(void) {
+    return *FL_STCURR;
+}
+
+static inline void fl_systick_set_calibration(const unsigned reload_value,
+                                              const unsigned has_skew,
+                                              const unsigned no_ext_ref_clock) {
+    *FL_STCALIB = reload_value | (has_skew<<30) | (no_ext_ref_clock<<31);
+}
+
+static inline unsigned fl_systick_get_calibration_reload_value(void) {
+    return *FL_STCALIB & ((1U<<24)-1);
+}
+
+static inline unsigned fl_systick_get_calibration_skew(void) {
+    return *FL_STCALIB & (1U<<30);
+}
+
+static inline unsigned fl_systick_get_calibration_noref(void) {
+    return *FL_STCALIB & (1U<<31);
+}
+
+#endif
\ No newline at end of file