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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/GPIO/IOToggle/readme.txt @ 0:c59513fd84fb
Initial commit of STM32 test code.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Mon, 03 Oct 2011 21:19:15 +1030 |
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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>© COPYRIGHT 2011 STMicroelectronics</center></h3> |
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87 */ |