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-/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
-* File Name : readme.txt
-* Author : MCD Application Team
-* Version : V2.0.1
-* Date : 06/13/2008
-* Description : Description of the NVIC CM3 Low Power Example.
-********************************************************************************
-* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
-* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
-* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
-* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
-* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
-* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
-*******************************************************************************/
-
-Example description
-===================
-This example describes how to use the NVIC firmware library to demonstrate the
-Cortex-M3 low power modes capabilities (WFE and WFI).
-
-This example uses three EXTI lines(Wakeup button EXTI Line, Key button EXTI Line
-& Tamper button EXTI Line)to generate interrupts and event on each falling edge.
-The Wakeup button EXTI Line and Tamper button EXTI Line are configured in
-interrupt mode and the Key button EXTI Line in event mode. The user has to select
-which low power mode would execute through a five define in the main code.
-
-These choices are:
-
- - Wait For Interrupt (WFI) Sleep On Exit: in this mode the WFI instruction is
- excecuted automatically on an exception Return. The exception will be executed
- if has enough priority to run and the core will return in the WFI mode.
- To run this behaviour proceed as following:
-
- * Choose the #WFISLEEPONEXIT define and comment others defines
- * run the example
- * The Wakeup button EXTI Line toggles LD4.
- * Push the Tamper button, the SLEEPONEXIT function is selected
- Any edge on the Wakeup button EXTI Line or Tamper button EXTI Line will
- execute the EXTI interrupt, when exit from the ISR the core will enter WFI
- mode. Any time you push the Wakeup button the core exit from WFI mode,
- LD4 is toggled then the core enters again in WFI mode.
- This behavior is repeated in an infinite loop.
-
- - Wait For Interrupt (WFI) Sleep Now: in this mode the WFI instruction is
- excecuted directly. To run this behaviour proceed as following:
-
- * Choose the #WFISLEEPNOW define and comment others defines
- * run the example
- * The Tamper button EXTI Line will toggle LD1 and put the core in the WFI mode.
- * To wakeup the Core use the Wakeup button that will toggle the LD3.
- This behavior is repeated in an infinite loop.
-
- - Wait For Event (WFE) SEV ON PEND: in this mode the WFE instruction is excecuted
- directly and the main instruction stream (execution priority) is boosted by the
- register PRIMASK (main priority = 0).
- To run this behaviour proceed as following:
-
- * Choose the #WFESEVONPEND define and comment others defines
- * run the example
- * The Tamper button EXTI Line will boost the execution priority to 0 (no
- interrupt will be executed after due to the priority boosting), toggle
- LD1 and put the core in WFE mode.
- * To wakeUp the Core use the Wakeup button that will not toggle the LD3 but
- will only wakeup the core from the WFE (SEV ON PEND).
- This EXTI Line interrupt has passed from unpended state to a pended state
- which wakeup the core from the WFE.
- * To wakeup the core also you can use theTamper button configured in event
- mode.
- * if the #RTC_Alarm_WFEWakeUp define is enabled, the RTC alarm will wakeUp
- the Core after 6 seconds (if none of Tamper button EXTI Line and Key
- button EXTI Line was used before this delay to wakeUp the Core)
-
- - Wait For Event (WFE) SEV ON EVENT: in this mode the WFE instruction is
- excecuted directly. To run this behaviour proceed as following:
-
- * Choose the #WFESEVONEVENT define and comment others defines
- * run the example
- * The Tamper button EXTI Line will toggle LD1 and put the core in the WFE mode.
- * To wakeup the Core use the Wakeup button that will toggle the LD3.
- * To wakeup the core also you can use the Key button configured in event mode.
- * if the #RTC_Alarm_WFEWakeUp define is enabled, the RTC alarm will wakeUp
- the Core after 6 seconds (if none of Tamper button EXTI Line and Key button
- EXTI Line was used before this delay to wakeup the Core)
- This behavior is repeated in an infinite loop.
-
-LD4 is toggled to indicate whether the MCU is in RUN or in low power mode.
-
-Directory contents
-==================
-platform_config.h Evaluation board specific configuration file
-stm32f10x_conf.h Library Configuration file
-stm32f10x_it.c Interrupt handlers
-stm32f10x_it.h Interrupt handlers header file
-main.c Main program
-
-
-Hardware environment
-====================
-This example runs on STMicroelectronics STM3210B-EVAL and STM3210E-EVAL evaluation
-boards and can be easily tailored to any other hardware.
-To select the STMicroelectronics evaluation board used to run the example, uncomment
-the corresponding line in platform_config.h file.
-
- + STM3210B-EVAL
- - Use LD1, LD2, LD3 and LD4 leds connected respectively to PC.06, PC.07, PC.08
- and PC.09 pins
- - Use the Key push-button connected to pin PB.09 (EXTI Line9).
- - Use the Wakeup push-button connected to pin PA.00 (EXTI Line0).
- - Use the Tamper push-button connected to pin PC.13 (EXTI Line13).
-
- + STM3210E-EVAL
- - Use LD1, LD2, LD3 and LD4 leds connected respectively to PF.06, PF0.7, PF.08
- and PF.09 pins
- - Use the Key push-button connected to pin PG.08 (EXTI Line8).
- - Use the Wakeup push-button connected to pin PA.00 (EXTI Line0).
- - Use the Tamper push-button connected to pin PC.13 (EXTI Line13).
-
-How to use it
-=============
-In order to make the program work, you must do the following :
-- Create a project and setup all your toolchain's start-up files
-- Compile the directory content files and required Library files :
- + stm32f10x_lib.c
- + stm32f10x_exti.c
- + stm32f10x_gpio.c
- + stm32f10x_rcc.c
- + stm32f10x_nvic.c
- + stm32f10x_rtc.c
- + stm32f10x_pwr.c
- + stm32f10x_bkp.c
- + stm32f10x_flash.c
-
-- Link all compiled files and load your image into target memory
-- Run the example
-
-
-******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE******