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diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/WWDG/WWDG_Reset/readme.txt b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/WWDG/WWDG_Reset/readme.txt new file mode 100644 index 0000000..269ff89 --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/WWDG/WWDG_Reset/readme.txt @@ -0,0 +1,119 @@ +/** + @page WWDG_Reset WWDG Reset example + + @verbatim + ******************** (C) COPYRIGHT 2011 STMicroelectronics ******************* + * @file WWDG/WWDG_Reset/readme.txt + * @author MCD Application Team + * @version V3.5.0 + * @date 08-April-2011 + * @brief Description of the WWDG Reset 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. + ****************************************************************************** + @endverbatim + +@par Example Description + +This example shows how to update at regular period the WWDG counter and how to +simulate a software fault generating an MCU WWDG reset on expiry of a programmed +time period. + +The WWDG timeout is set to 65.53ms and the refresh window is set to 80. +The WWDG counter is refreshed each 50ms in the main program infinite loop to +prevent a WWDG reset. +LED2 is also toggled each 50ms indicating that the program is running. + +An EXTI Line is connected to a GPIO pin, and configured to generate an interrupt +on the rising edge of the signal. + +The EXTI Line is used to simulate a software failure: once the EXTI Line event +occurs, by pressing the Key push-button, the corresponding interrupt is served. +In the ISR, a write to invalid address generates a Hardfault exception containing +an infinite loop and preventing to return to main program (the WWDG counter is +not refreshed). +As a result, when the WWDG counter falls to 63, the WWDG reset occurs. +If the WWDG reset is generated, after the system resumes from reset, LED1 turns on. + +If the EXTI Line event does not occur, the WWDG counter is indefinitely refreshed +in the main program infinite loop, and there is no WWDG reset. + +In this example the system clock is set to 24 MHz on Value line devices and to +72 MHz on other devices. + + +@par Directory contents + + - WWDG/WWDG_Reset/stm32f10x_conf.h Library Configuration file + - WWDG/WWDG_Reset/stm32f10x_it.c Interrupt handlers + - WWDG/WWDG_Reset/stm32f10x_it.h Header for stm32f10x_it.c + - WWDG/WWDG_Reset/main.c Main program + - WWDG/WWDG_Reset/system_stm32f10x.c STM32F10x system source file + +@par Hardware and Software environment + + - This example runs on STM32F10x Connectivity line, High-Density, High-Density + Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density + and Low-Density Value line Devices. + + - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density + Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line), + STM3210E-EVAL (High-Density and XL-Density)and STM3210B-EVAL (Medium-Density) + evaluation boards and can be easily tailored to any other supported device + and development board. + To select the STMicroelectronics evaluation board used to run the example, + uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL) + + - STM32100E-EVAL Set-up + - Use LD1 and LD2 leds connected respectively to PF.06 and PF.07 pins + - Use the KEY push button connected to PG.08 pin (EXTI Line8). + + - STM32100B-EVAL Set-up + - Use LD1 and LD2 leds connected respectively to PC.06 and PC.07 pins + - Use the KEY push button connected to PB.09 pin (EXTI Line9). + + - STM3210C-EVAL Set-up + - Use LD1 and LD2 connected respectively to PD.07 and PD.13 pins + - Use the Key push-button connected to pin PB.09 (EXTI Line9). + + - STM3210E-EVAL Set-up + - Use LD1 and LD2 leds connected respectively to PF.06 and PF.07 pins + - Use the KEY push button connected to PG.08 pin (EXTI Line8). + + - STM3210B-EVAL Set-up + - Use LD1 and LD2 leds connected respectively to PC.06 and PC.07 pins + - Use the KEY push button connected to PB.09 pin (EXTI Line9). + +@par How to use it ? + +In order to make the program work, you must do the following : + - Copy all source files from this example folder to the template folder under + Project\STM32F10x_StdPeriph_Template + - Open your preferred toolchain + - Rebuild all files and load your image into target memory + - Run the example + +@note + - Low-density Value line devices are STM32F100xx microcontrollers where the + Flash memory density ranges between 16 and 32 Kbytes. + - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx + microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes. + - Medium-density Value line devices are STM32F100xx microcontrollers where + the Flash memory density ranges between 64 and 128 Kbytes. + - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx + microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes. + - High-density Value line devices are STM32F100xx microcontrollers where + the Flash memory density ranges between 256 and 512 Kbytes. + - High-density devices are STM32F101xx and STM32F103xx microcontrollers where + the Flash memory density ranges between 256 and 512 Kbytes. + - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where + the Flash memory density ranges between 512 and 1024 Kbytes. + - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers. + + * <h3><center>© COPYRIGHT 2011 STMicroelectronics</center></h3> + */ |