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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/GPIO/IOToggle/readme.txt @ 68:cc998b0b2bae

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Handle missing modules in OWGetTemp.
author Daniel O'Connor <darius@dons.net.au>
date Sun, 14 Apr 2013 16:07:29 +0930
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1 /**
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2 @page GPIO_IOToggle GPIO IO Toggle 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 GPIO/IOToggle/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 GPIO IO Toggle 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 GPIO ports are connected on APB2 bus, using BSRRH and BSRRL registers 2 cycles
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24 are required to set a pin and another cycle to reset it. So GPIO pins can toggle
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25 at AHB clock divided by 4.
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26
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27 This example describes how to use BSRR and BRR (Port Bit Set/Reset Register
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28 and Port Bit Reset Register) for maximum IO toggling.
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29
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30 PD0 and PD2 (configured in output pushpull mode) toggles in a forever loop:
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31 - Set PD0 and PD2 by setting corresponding bits in BSRR register
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32 - Reset PD0 and PD2 by setting corresponding bits in BRR register
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33
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34 In this example, HCLK is configured at 72 MHz so PD0 and PD2 toggles at 18MHz.
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35 To achieve the maximum IO toggling frequency, you have to configure your compiler
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36 options for high speed optimization.
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37
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38 @par Directory contents
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39
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40 - GPIO/IOToggle/stm32f10x_conf.h Library Configuration file
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41 - GPIO/IOToggle/stm32f10x_it.c Interrupt handlers
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42 - GPIO/IOToggle/stm32f10x_it.h Header for stm32f10x_it.c
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43 - GPIO/IOToggle/main.c Main program
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44 - GPIO/IOToggle/system_stm32f10x.c STM32F10x system source file
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45
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46 @par Hardware and Software environment
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47
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48 - This example runs on STM32F10x Connectivity line, High-Density, High-Density
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49 Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density
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50 and Low-Density Value line Devices.
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51
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52 - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density
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53 Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL
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54 (Connectivity line), STM3210E-EVAL (High-Density and XL-Density) and
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55 STM3210B-EVAL (Medium-Density) evaluation boards and can be easily tailored
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56 to any other supported device and development board.
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57 To select the STMicroelectronics evaluation board used to run the example,
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58 uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL)
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59
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60 @par How to use it ?
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61
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62 In order to make the program work, you must do the following :
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63 - Copy all source files from this example folder to the template folder under
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64 Project\STM32F10x_StdPeriph_Template
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65 - Open your preferred toolchain
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66 - Rebuild all files and load your image into target memory
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67 - Run the example
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68
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69 @note
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70 - Low-density Value line devices are STM32F100xx microcontrollers where the
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71 Flash memory density ranges between 16 and 32 Kbytes.
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72 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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73 microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
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74 - Medium-density Value line devices are STM32F100xx microcontrollers where
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75 the Flash memory density ranges between 64 and 128 Kbytes.
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76 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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77 microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
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78 - High-density Value line devices are STM32F100xx microcontrollers where
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79 the Flash memory density ranges between 256 and 512 Kbytes.
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80 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
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81 the Flash memory density ranges between 256 and 512 Kbytes.
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82 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
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83 the Flash memory density ranges between 512 and 1024 Kbytes.
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84 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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85
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86 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
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87 */