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author Daniel O'Connor <darius@dons.net.au>
date Fri, 13 Mar 2015 11:39:59 +1030
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1 /**
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2 @page TIM_OnePulse TIM One Pulse 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 TIM/OnePulse/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 TIM One Pulse 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 use the TIM peripheral to generate a One pulse Mode
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24 after a Rising edge of an external signal is received in Timer Input pin.
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25
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26 TIM2CLK = SystemCoreClock, we want to get TIM2 counter clock at 24 MHz:
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27 - Prescaler = (TIM2CLK / TIM2 counter clock) - 1
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28 SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
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29 and Connectivity line devices and to 24 MHz for Low-Density Value line,
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30 Medium-Density Value line and High-Density devices.
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31
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32 The Autoreload value is 65535 (TIM4->ARR), so the maximum frequency value to
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33 trigger the TIM4 input is 24000000/65535 = 300 Hz.
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34
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35 The TIM4 is configured as follows:
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36 The One Pulse mode is used, the external signal is connected to TIM4 CH2 pin (PB.07),
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37 the rising edge is used as active edge, the One Pulse signal is output
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38 on TIM4_CH1 (PB.06).
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39
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40 The TIM_Pulse defines the delay value, the delay value is fixed to:
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41 delay = CCR1/TIM4 counter clock = 16383 / 24000000 = 682.6 us.
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42 The (TIM_Period - TIM_Pulse) defines the One Pulse value, the pulse value is fixed to:
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43 One Pulse value = (TIM_Period - TIM_Pulse)/TIM4 counter clock
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44 = (65535 - 16383) / 24000000 = 2.048 ms.
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45
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46 @par Directory contents
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47
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48 - TIM/OnePulse/stm32f10x_conf.h Library Configuration file
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49 - TIM/OnePulse/stm32f10x_it.c Interrupt handlers
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50 - TIM/OnePulse/stm32f10x_it.h Interrupt handlers header file
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51 - TIM/OnePulse/main.c Main program
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52 - TIM/OnePulse/system_stm32f10x.c STM32F10x system source file
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53
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54 @par Hardware and Software environment
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55
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56 - This example runs on STM32F10x Connectivity line, High-Density, High-Density
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57 Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density
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58 and Low-Density Value line Devices.
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59
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60 - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density
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61 Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line),
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62 STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density)
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63 evaluation boards and can be easily tailored to any other supported device
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64 and development board.
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65
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66 - STM32100B-EVAL, STM3210E-EVAL, STM3210B-EVAL, STM32100E-EVAL and STM3210C-EVAL Set-up
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67 - Connect the external signal to the TIM4_CH2 pin (PB.07)
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68 - Connect the TIM4_CH1 (PB.06) pin to an oscilloscope to monitor the waveform.
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69
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70 @par How to use it ?
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71
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72 In order to make the program work, you must do the following :
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73 - Copy all source files from this example folder to the template folder under
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74 Project\STM32F10x_StdPeriph_Template
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75 - Open your preferred toolchain
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76 - Rebuild all files and load your image into target memory
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77 - Run the example
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78
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79 @note
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80 - Low-density Value line devices are STM32F100xx microcontrollers where the
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81 Flash memory density ranges between 16 and 32 Kbytes.
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82 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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83 microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
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84 - Medium-density Value line devices are STM32F100xx microcontrollers where
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85 the Flash memory density ranges between 64 and 128 Kbytes.
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86 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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87 microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
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88 - High-density Value line devices are STM32F100xx microcontrollers where
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89 the Flash memory density ranges between 256 and 512 Kbytes.
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90 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
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91 the Flash memory density ranges between 256 and 512 Kbytes.
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92 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
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93 the Flash memory density ranges between 512 and 1024 Kbytes.
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94 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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95
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96 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
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97 */