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authorchrysn2012-10-18 21:42:12 +0200
committerchrysn2012-10-18 21:45:20 +0200
commite20f1c0d8fb6c75c434b93834a9d67262198d908 (patch)
tree521777dbc351ab9f0b6c416fedc344e6b5fd3e9e /lib/cm3/scb.c
parent75c9cfc287439afb24a6aee1fc26a0b4e8dfeb9f (diff)
unify scb (system control block)
these register definitions are common to all cortex mcus. some of the registers might not be implemented everywhere (especially the floating point registers), but defining them does no harm. this modification does not result in any changes in the example binaries.
Diffstat (limited to 'lib/cm3/scb.c')
-rw-r--r--lib/cm3/scb.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/cm3/scb.c b/lib/cm3/scb.c
new file mode 100644
index 0000000..904bd7c
--- /dev/null
+++ b/lib/cm3/scb.c
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/scb.h>
+
+void scb_reset_core(void)
+{
+ SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_VECTRESET;
+}
+
+void scb_reset_system(void)
+{
+ SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_SYSRESETREQ;
+}
+
+void scb_set_priority_grouping(u32 prigroup)
+{
+ SCB_AIRCR = SCB_AIRCR_VECTKEY | prigroup;
+}