git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7323 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 31 insertions, 14 deletions

diff --git a/os/ext/CMSIS/ST/system_stm32f4xx.h b/os/ext/CMSIS/ST/system_stm32f4xx.h
index 000e382dd..a95324e63 100644
--- a/os/ext/CMSIS/ST/system_stm32f4xx.h
+++ b/os/ext/CMSIS/ST/system_stm32f4xx.h
@@ -2,25 +2,35 @@
   ******************************************************************************

   * @file    system_stm32f4xx.h

   * @author  MCD Application Team

-  * @version V1.2.1

-  * @date    19-September-2013

+  * @version V2.1.0

+  * @date    19-June-2014

   * @brief   CMSIS Cortex-M4 Device System Source File for STM32F4xx devices.       

   ******************************************************************************  

   * @attention

   *

-  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>

+  * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>

   *

-  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");

-  * You may not use this file except in compliance with the License.

-  * You may obtain a copy of the License at:

+  * 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 of STMicroelectronics nor the names of its contributors

+  *      may be used to endorse or promote products derived from this software

+  *      without specific prior written permission.

   *

-  *        http://www.st.com/software_license_agreement_liberty_v2

-  *

-  * Unless required by applicable law or agreed to in writing, software 

-  * distributed under the License is distributed on an "AS IS" BASIS, 

-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-  * See the License for the specific language governing permissions and

-  * limitations under the License.

+  * 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 HOLDER 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.

   *

   ******************************************************************************  

   */ 

@@ -55,7 +65,14 @@
 /** @addtogroup STM32F4xx_System_Exported_types

   * @{

   */

-

+  /* This variable is updated in three ways:

+      1) by calling CMSIS function SystemCoreClockUpdate()

+      2) by calling HAL API function HAL_RCC_GetSysClockFreq()

+      3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency 

+         Note: If you use this function to configure the system clock; then there

+               is no need to call the 2 first functions listed above, since SystemCoreClock

+               variable is updated automatically.

+  */

 extern uint32_t SystemCoreClock;          /*!< System Clock Frequency (Core Clock) */