From afbb4cc73c44b6321cae39dbe46b97155805097d Mon Sep 17 00:00:00 2001 From: Trygve Laugstøl Date: Sun, 13 Dec 2015 21:03:11 +0100 Subject: wip --- .../TIM/PWM_Input/readme.txt | 97 ++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/readme.txt (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/readme.txt') diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/readme.txt b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/readme.txt new file mode 100644 index 0000000..10772aa --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/readme.txt @@ -0,0 +1,97 @@ +/** + @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. + + *

© COPYRIGHT 2011 STMicroelectronics

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