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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-12-21 18:49:04 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-12-21 18:49:04 +0000 |
| commit | 334c7d645d1eccc59b9e19678b5e47d1e3ae2320 (patch) | |
| tree | 7d10743985bd29c48c818f872f4fd7365fe19d96 /os/ports/common/ARMCMx/nvic.c | |
| parent | 6100dc08a6a9f4592f324204bad26ba11239a030 (diff) | |
| download | ChibiOS-334c7d645d1eccc59b9e19678b5e47d1e3ae2320.tar.gz ChibiOS-334c7d645d1eccc59b9e19678b5e47d1e3ae2320.tar.bz2 ChibiOS-334c7d645d1eccc59b9e19678b5e47d1e3ae2320.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3645 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/ports/common/ARMCMx/nvic.c')
| -rw-r--r-- | os/ports/common/ARMCMx/nvic.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/os/ports/common/ARMCMx/nvic.c b/os/ports/common/ARMCMx/nvic.c new file mode 100644 index 000000000..5c8d52f55 --- /dev/null +++ b/os/ports/common/ARMCMx/nvic.c @@ -0,0 +1,74 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file common/ARMCMx/nvic.c
+ * @brief Cortex-Mx NVIC support code.
+ *
+ * @addtogroup COMMON_ARMCMx_NVIC
+ * @{
+ */
+
+#include "ch.h"
+#include "nvic.h"
+
+/**
+ * @brief Sets the priority of an interrupt handler and enables it.
+ * @note The parameters are not tested for correctness.
+ *
+ * @param[in] n the interrupt number
+ * @param[in] prio the interrupt priority mask
+ */
+void nvicEnableVector(uint32_t n, uint32_t prio) {
+ unsigned sh = (n & 3) << 3;
+
+ NVIC_IPR(n >> 2) = (NVIC_IPR(n >> 2) & ~(0xFF << sh)) | (prio << sh);
+ NVIC_ICPR(n >> 5) = 1 << (n & 0x1F);
+ NVIC_ISER(n >> 5) = 1 << (n & 0x1F);
+}
+
+/**
+ * @brief Disables an interrupt handler.
+ * @note The parameters are not tested for correctness.
+ *
+ * @param[in] n the interrupt number
+ */
+void nvicDisableVector(uint32_t n) {
+ unsigned sh = (n & 3) << 3;
+
+ NVIC_ICER(n >> 5) = 1 << (n & 0x1F);
+ NVIC_IPR(n >> 2) = NVIC_IPR(n >> 2) & ~(0xFF << sh);
+}
+
+/**
+ * @brief Changes the priority of a system handler.
+ * @note The parameters are not tested for correctness.
+ *
+ * @param[in] handler the system handler number
+ * @param[in] prio the system handler priority mask
+ */
+void nvicSetSystemHandlerPriority(uint32_t handler, uint32_t prio) {
+ unsigned sh = (handler & 3) * 8;
+
+ SCB_SHPR(handler >> 2) = (SCB_SHPR(handler >> 2) &
+ ~(0xFF << sh)) | (prio << sh);
+}
+
+/** @} */
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