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comparison libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/InputCapture/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 /** | |
2 @page TIM_Input_Capture TIM Input Capture example | |
3 | |
4 @verbatim | |
5 ******************** (C) COPYRIGHT 2011 STMicroelectronics ******************* | |
6 * @file TIM/InputCapture/readme.txt | |
7 * @author MCD Application Team | |
8 * @version V3.5.0 | |
9 * @date 08-April-2011 | |
10 * @brief Description of the TIM Input Capture example. | |
11 ****************************************************************************** | |
12 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS | |
13 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE | |
14 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY | |
15 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING | |
16 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE | |
17 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. | |
18 ****************************************************************************** | |
19 @endverbatim | |
20 | |
21 @par Example Description | |
22 | |
23 This example shows how to use the TIM peripheral to measure the frequency of an | |
24 external signal. | |
25 | |
26 The TIMxCLK frequency is set to SystemCoreClock (Hz), the Prescaler is 0 so the | |
27 TIM3 counter clock is SystemCoreClock (Hz). | |
28 SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density | |
29 and Connectivity line devices. For Low-Density Value line and Medium-Density | |
30 Value line devices, SystemCoreClock is set to 24 MHz. | |
31 | |
32 TIM3 is configured in Input Capture Mode: the external signal is connected to | |
33 TIM3 Channel2 used as input pin. | |
34 To measure the frequency we use the TIM3 CC2 interrupt request, | |
35 so In the TIM3_IRQHandler routine, the frequency of the external signal is computed. | |
36 The "TIM3Freq" variable contains the external signal frequency: | |
37 TIM3Freq = TIM3 counter clock / Capture in Hz, | |
38 where the Capture is the difference between two consecutive TIM3 captures. | |
39 | |
40 For Low-density, Medium-density, High-density and Connectivity line devices, | |
41 the minimum frequency value to measure is 1100 Hz. | |
42 For Low-Density Value line, Medium-Density and High-Density Value line devices, | |
43 the minimum frequency value to measure is 366 Hz. | |
44 | |
45 @par Directory contents | |
46 | |
47 - TIM/InputCapture/stm32f10x_conf.h Library Configuration file | |
48 - TIM/InputCapture/stm32f10x_it.c Interrupt handlers | |
49 - TIM/InputCapture/stm32f10x_it.h Interrupt handlers header file | |
50 - TIM/InputCapture/main.c Main program | |
51 - TIM/InputCapture/system_stm32f10x.c STM32F10x system source file | |
52 | |
53 @par Hardware and Software environment | |
54 | |
55 - This example runs on STM32F10x Connectivity line, High-Density, High-Density | |
56 Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density | |
57 and Low-Density Value line Devices. | |
58 | |
59 - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density | |
60 Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line), | |
61 STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density) | |
62 evaluation boards and can be easily tailored to any other supported device | |
63 and development board. | |
64 | |
65 - STM32100E-EVAL, STM32100B-EVAL, STM3210C-EVAL, STM3210E-EVAL and STM3210B-EVAL Set-up | |
66 - Connect the external signal to measure to the TIM3 CH2 pin (PA.07). | |
67 | |
68 @par How to use it ? | |
69 | |
70 In order to make the program work, you must do the following : | |
71 - Copy all source files from this example folder to the template folder under | |
72 Project\STM32F10x_StdPeriph_Template | |
73 - Open your preferred toolchain | |
74 - Rebuild all files and load your image into target memory | |
75 - Run the example | |
76 | |
77 @note | |
78 - Low-density Value line devices are STM32F100xx microcontrollers where the | |
79 Flash memory density ranges between 16 and 32 Kbytes. | |
80 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx | |
81 microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes. | |
82 - Medium-density Value line devices are STM32F100xx microcontrollers where | |
83 the Flash memory density ranges between 64 and 128 Kbytes. | |
84 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx | |
85 microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes. | |
86 - High-density Value line devices are STM32F100xx microcontrollers where | |
87 the Flash memory density ranges between 256 and 512 Kbytes. | |
88 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where | |
89 the Flash memory density ranges between 256 and 512 Kbytes. | |
90 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where | |
91 the Flash memory density ranges between 512 and 1024 Kbytes. | |
92 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers. | |
93 | |
94 * <h3><center>© COPYRIGHT 2011 STMicroelectronics</center></h3> | |
95 */ |