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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/WWDG/WWDG_Reset/readme.txt @ 85:18b154c447bb

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Add note about 1-wire wiring
author Daniel O'Connor <darius@dons.net.au>
date Thu, 12 Mar 2015 23:22:11 +1030
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1 /**
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2 @page WWDG_Reset WWDG Reset example
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3
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4 @verbatim
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5 ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
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6 * @file WWDG/WWDG_Reset/readme.txt
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7 * @author MCD Application Team
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8 * @version V3.5.0
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9 * @date 08-April-2011
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10 * @brief Description of the WWDG Reset example.
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11 ******************************************************************************
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12 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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13 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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14 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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15 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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16 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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17 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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18 ******************************************************************************
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19 @endverbatim
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20
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21 @par Example Description
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22
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23 This example shows how to update at regular period the WWDG counter and how to
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24 simulate a software fault generating an MCU WWDG reset on expiry of a programmed
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25 time period.
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26
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27 The WWDG timeout is set to 65.53ms and the refresh window is set to 80.
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28 The WWDG counter is refreshed each 50ms in the main program infinite loop to
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29 prevent a WWDG reset.
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30 LED2 is also toggled each 50ms indicating that the program is running.
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31
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32 An EXTI Line is connected to a GPIO pin, and configured to generate an interrupt
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33 on the rising edge of the signal.
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34
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35 The EXTI Line is used to simulate a software failure: once the EXTI Line event
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36 occurs, by pressing the Key push-button, the corresponding interrupt is served.
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37 In the ISR, a write to invalid address generates a Hardfault exception containing
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38 an infinite loop and preventing to return to main program (the WWDG counter is
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39 not refreshed).
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40 As a result, when the WWDG counter falls to 63, the WWDG reset occurs.
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41 If the WWDG reset is generated, after the system resumes from reset, LED1 turns on.
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42
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43 If the EXTI Line event does not occur, the WWDG counter is indefinitely refreshed
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44 in the main program infinite loop, and there is no WWDG reset.
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45
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46 In this example the system clock is set to 24 MHz on Value line devices and to
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47 72 MHz on other devices.
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48
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49
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50 @par Directory contents
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51
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52 - WWDG/WWDG_Reset/stm32f10x_conf.h Library Configuration file
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53 - WWDG/WWDG_Reset/stm32f10x_it.c Interrupt handlers
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54 - WWDG/WWDG_Reset/stm32f10x_it.h Header for stm32f10x_it.c
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55 - WWDG/WWDG_Reset/main.c Main program
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56 - WWDG/WWDG_Reset/system_stm32f10x.c STM32F10x system source file
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57
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58 @par Hardware and Software environment
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59
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60 - This example runs on STM32F10x Connectivity line, High-Density, High-Density
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61 Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density
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62 and Low-Density Value line Devices.
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63
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64 - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density
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65 Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line),
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66 STM3210E-EVAL (High-Density and XL-Density)and STM3210B-EVAL (Medium-Density)
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67 evaluation boards and can be easily tailored to any other supported device
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68 and development board.
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69 To select the STMicroelectronics evaluation board used to run the example,
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70 uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL)
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71
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72 - STM32100E-EVAL Set-up
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73 - Use LD1 and LD2 leds connected respectively to PF.06 and PF.07 pins
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74 - Use the KEY push button connected to PG.08 pin (EXTI Line8).
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75
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76 - STM32100B-EVAL Set-up
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77 - Use LD1 and LD2 leds connected respectively to PC.06 and PC.07 pins
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78 - Use the KEY push button connected to PB.09 pin (EXTI Line9).
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79
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80 - STM3210C-EVAL Set-up
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81 - Use LD1 and LD2 connected respectively to PD.07 and PD.13 pins
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82 - Use the Key push-button connected to pin PB.09 (EXTI Line9).
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83
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84 - STM3210E-EVAL Set-up
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85 - Use LD1 and LD2 leds connected respectively to PF.06 and PF.07 pins
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86 - Use the KEY push button connected to PG.08 pin (EXTI Line8).
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87
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88 - STM3210B-EVAL Set-up
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89 - Use LD1 and LD2 leds connected respectively to PC.06 and PC.07 pins
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90 - Use the KEY push button connected to PB.09 pin (EXTI Line9).
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91
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92 @par How to use it ?
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93
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94 In order to make the program work, you must do the following :
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95 - Copy all source files from this example folder to the template folder under
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96 Project\STM32F10x_StdPeriph_Template
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97 - Open your preferred toolchain
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98 - Rebuild all files and load your image into target memory
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99 - Run the example
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100
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101 @note
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102 - Low-density Value line devices are STM32F100xx microcontrollers where the
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103 Flash memory density ranges between 16 and 32 Kbytes.
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104 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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105 microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
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106 - Medium-density Value line devices are STM32F100xx microcontrollers where
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107 the Flash memory density ranges between 64 and 128 Kbytes.
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108 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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109 microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
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110 - High-density Value line devices are STM32F100xx microcontrollers where
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111 the Flash memory density ranges between 256 and 512 Kbytes.
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112 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
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113 the Flash memory density ranges between 256 and 512 Kbytes.
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114 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
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115 the Flash memory density ranges between 512 and 1024 Kbytes.
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116 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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117
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118 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
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119 */