Add code changes from Uros

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3507 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 90 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/stm32/stm32_pwr.c b/nuttx/arch/arm/src/stm32/stm32_pwr.c
new file mode 100644
index 000000000..861d32b64
--- /dev/null
+++ b/nuttx/arch/arm/src/stm32/stm32_pwr.c
@@ -0,0 +1,90 @@
+/************************************************************************************
+ * arch/arm/src/stm32/stm32_pwr.c
+ *
+ *   Copyright (C) 2011 Uros Platise. All rights reserved.
+ *   Author: Uros Platise <uros.platise@isotel.eu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/** \file
+ *  \author Uros Platise
+ *  \brief STM32 Power
+ *  
+ * \addtogroup STM32_PWR
+ * \{
+ */
+
+#include <nuttx/config.h>
+#include <nuttx/arch.h>
+
+#include <stdint.h>
+#include <errno.h>
+
+#include "up_arch.h"
+#include "stm32_pwr.h"
+
+
+#if defined(CONFIG_STM32_PWR)
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+static inline uint16_t stm32_pwr_getreg(uint8_t offset)
+{
+    return getreg32(STM32_PWR_BASE + offset);
+}
+
+
+static inline void stm32_pwr_putreg(uint8_t offset, uint16_t value)
+{
+    putreg32(value, STM32_PWR_BASE + offset);
+}
+
+
+static inline void stm32_pwr_modifyreg(uint8_t offset, uint16_t clearbits, uint16_t setbits)
+{
+    modifyreg32(STM32_PWR_BASE + offset, clearbits, setbits);
+}
+
+
+
+/************************************************************************************
+ * Public Function - Initialization
+ ************************************************************************************/
+
+void stm32_pwr_enablebkp(void)
+{
+    stm32_pwr_modifyreg(STM32_PWR_CR_OFFSET, 0, PWR_CR_DBP);
+}
+
+
+#endif // defined(CONFIG_STM32_PWR)
+/** \} */