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authorTrygve Laugstøl <trygvis@inamo.no>2017-01-25 22:24:18 +0100
committerTrygve Laugstøl <trygvis@inamo.no>2017-01-25 22:29:25 +0100
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-/**
- @page TIM_PWM_Input TIM PWM Input example
-
- @verbatim
- ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
- * @file TIM/PWM_Input/readme.txt
- * @author MCD Application Team
- * @version V3.5.0
- * @date 08-April-2011
- * @brief Description of the TIM PWM Input example.
- ******************************************************************************
- * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
- * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
- * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
- * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
- * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
- * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
- ******************************************************************************
- @endverbatim
-
-@par Example Description
-
-This example shows how to use the TIM peripheral to measure the frequency and
-duty cycle of an external signal.
-
-The TIMxCLK frequency is set to SystemCoreClock (Hz), the Prescaler is 0 so the
-TIM3 counter clock is SystemCoreClock (Hz).
-SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
-and Connectivity line devices. For Low-Density Value line, Medium-Density
-Value line and High-Density devices, SystemCoreClock is set to 24 MHz.
-
-TIM3 is configured in PWM Input Mode: the external signal is connected to
-TIM3 Channel2 used as input pin.
-To measure the frequency and the duty cycle we use the TIM3 CC2 interrupt request,
-so In the TIM3_IRQHandler routine, the frequency and the duty cycle of the external
-signal are computed.
-The "Frequency" variable contains the external signal frequency:
-Frequency = TIM3 counter clock / TIM3_CCR2 in Hz,
-The "DutyCycle" variable contains the external signal duty cycle:
-DutyCycle = (TIM3_CCR1*100)/(TIM3_CCR2) in %.
-
-For Low-density, Medium-density, High-density and Connectivity line devices,
-the minimum frequency value to measure is 1100 Hz.
-For Low-Density Value line and Medium-Density Value line devices, the minimum
-frequency value to measure is 366 Hz.
-
-@par Directory contents
-
- - TIM/PWM_Input/stm32f10x_conf.h Library Configuration file
- - TIM/PWM_Input/stm32f10x_it.c Interrupt handlers
- - TIM/PWM_Input/stm32f10x_it.h Interrupt handlers header file
- - TIM/PWM_Input/main.c Main program
- - TIM/PWM_Input/system_stm32f10x.c STM32F10x system source file
-
-@par Hardware and Software environment
-
- - This example runs on STM32F10x Connectivity line, High-Density, High-Density
- Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density
- and Low-Density Value line Devices.
-
- - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density
- Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line),
- STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density)
- evaluation boards and can be easily tailored to any other supported device
- and development board.
-
- - STM32100B-EVAL, STM3210E-EVAL, STM32100E-EVAL, STM3210B-EVAL and STM3210C-EVAL Set-up
- - Connect the external signal to measure to the TIM3 CH2 pin (PA.07).
-
-@par How to use it ?
-
-In order to make the program work, you must do the following :
- - Copy all source files from this example folder to the template folder under
- Project\STM32F10x_StdPeriph_Template
- - Open your preferred toolchain
- - Rebuild all files and load your image into target memory
- - Run the example
-
-@note
- - Low-density Value line devices are STM32F100xx microcontrollers where the
- Flash memory density ranges between 16 and 32 Kbytes.
- - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
- microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
- - Medium-density Value line devices are STM32F100xx microcontrollers where
- the Flash memory density ranges between 64 and 128 Kbytes.
- - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
- microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
- - High-density Value line devices are STM32F100xx microcontrollers where
- the Flash memory density ranges between 256 and 512 Kbytes.
- - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
- the Flash memory density ranges between 256 and 512 Kbytes.
- - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
- the Flash memory density ranges between 512 and 1024 Kbytes.
- - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
-
- * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
- */