From c506b8f2b1bf2446442040cd3f00f8750754d5aa Mon Sep 17 00:00:00 2001
From: barthess <barthess@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Wed, 4 Jan 2012 20:03:49 +0000
Subject: PVD. Checked compilability on F1x, L1x, F4x. Testhal fro F1x

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/pvd2_dev@3732 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/platforms/STM32F4xx/hal_lld.c   | 11 ++++++-----
 os/hal/platforms/STM32F4xx/stm32_rcc.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 5 deletions(-)

(limited to 'os/hal/platforms/STM32F4xx')

diff --git a/os/hal/platforms/STM32F4xx/hal_lld.c b/os/hal/platforms/STM32F4xx/hal_lld.c
index d9bf8374e..71b8ad219 100644
--- a/os/hal/platforms/STM32F4xx/hal_lld.c
+++ b/os/hal/platforms/STM32F4xx/hal_lld.c
@@ -74,14 +74,15 @@ void hal_lld_init(void) {
   /* DWT cycle counter enable.*/
   DWT_CTRL |= DWT_CTRL_CYCCNTENA;
 
-#if STM32_PVD_ENABLE
-  /* Programmable voltage detector initialization */
-  PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
-#endif /* STM32_PVD_ENABLE */
-
 #if defined(STM32_DMA_REQUIRED)
   dmaInit();
 #endif
+
+  /* Programmable voltage detector enable. */
+#if STM32_PVD_ENABLE
+  rccEnablePWRInterface(FALSE);
+  PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
+#endif /* STM32_PVD_ENABLE */
 }
 
 /**
diff --git a/os/hal/platforms/STM32F4xx/stm32_rcc.h b/os/hal/platforms/STM32F4xx/stm32_rcc.h
index 4971a71c5..a20274b26 100644
--- a/os/hal/platforms/STM32F4xx/stm32_rcc.h
+++ b/os/hal/platforms/STM32F4xx/stm32_rcc.h
@@ -390,6 +390,38 @@
 #define rccResetDMA2() rccResetAHB1(RCC_AHB1RSTR_DMA2RST)
 /** @} */
 
+/**
+ * @brief   PWR interface specific RCC operations
+ * @{
+ */
+/**
+ * @brief   Enables the PWR interface clock.
+ * @note    The @p lp parameter is ignored in this family.
+ *
+ * @param[in] lp        low power enable flag
+ *
+ * @api
+ */
+#define rccEnablePWRInterface(lp) rccEnableAPB1(RCC_APB1ENR_PWREN, lp)
+
+/**
+ * @brief   Disables PWR interface clock.
+ * @note    The @p lp parameter is ignored in this family.
+ *
+ * @param[in] lp        low power enable flag
+ *
+ * @api
+ */
+#define rccDisablePWRInterface(lp) rccDisableAPB1(RCC_APB1ENR_BKPEN, lp)
+
+/**
+ * @brief   Resets the PWR interface.
+ *
+ * @api
+ */
+#define rccResetPWRInterface() rccResetAPB1(RCC_APB1ENR_BKPRST)
+/** @} */
+
 /**
  * @brief   I2C peripherals specific RCC operations
  * @{
-- 
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