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101 lines
4.2 KiB
Plaintext
101 lines
4.2 KiB
Plaintext
/**
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@page TIM_OnePulse TIM example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file Examples_LL/TIM/TIM_OnePulse/readme.txt
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* @author MCD Application Team
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* @brief Description of the TIM_OnePulse example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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Configuration of a timer to generate a positive pulse in
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Output Compare mode with a length of tPULSE and after a delay of tDELAY. This example
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is based on the STM32F1xx TIM LL API. The peripheral initialization uses
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LL unitary service functions for optimization purposes (performance and size).
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The pulse is generated on OC1.
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This example uses 2 timer instances:
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- TIM3 generates a positive pulse of 50 us after a delay of 50 us. User push-button
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is used to start TIM3 counter.
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___
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User push-button ________________________| |________________________________
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___________
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OC1 ______________________________________| |________
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(TIM3_CH1) <---50 us---><---50 us--->
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| |_ uwMeasuredPulseLength
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|_ uwMeasuredDelay
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TIM3_CH1 delay and pulse length are measured every time a pulse is generated.
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Both can be observed through the debugger by monitoring the variables uwMeasuredDelay and
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uwMeasuredPulseLength respectively.
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- TIM2 generates a positive pulse of 3 s after a delay of 2 s. TIM2 counter start
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is controlled through the slave mode controller. TI2FP2 signals is selected as
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trigger input meaning that TIM2 counter starts when a rising edge is detected on
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TI2FP2. The TIM2 output channel is mapped on the pin PA.00.
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___
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TI2 _________________________| |_________________________________________
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(TIM2_CH2)
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___________________________
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OC1 ______________________________________| |____
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(TIM2_CH1) <-----2s-----><----------3 s------------->
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Both TIM3 and TIM2 are configured to generate a single pulse (timer counter
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stops automatically at the next update event (UEV).
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Connecting TIM3 OC1 to TIM2 TI2 allows to trigger TIM2 counter by pressing
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the User push-button.
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@par Directory contents
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- TIM/TIM_OnePulse/Inc/stm32f1xx_it.h Interrupt handlers header file
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- TIM/TIM_OnePulse/Inc/main.h Header for main.c module
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- TIM/TIM_OnePulse/Inc/stm32_assert.h Template file to include assert_failed function
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- TIM/TIM_OnePulse/Src/stm32f1xx_it.c Interrupt handlers
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- TIM/TIM_OnePulse/Src/main.c Main program
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- TIM/TIM_OnePulse/Src/system_stm32f1xx.c STM32F1xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F103xB devices.
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- This example has been tested with STM32F103RB-Nucleo board and can be
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easily tailored to any other supported device and development board.
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- STM32F103RB-Nucleo Set-up:
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- TIM3_CH1 PA.06: connected to pin 5 of CN5 connector
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- TIM2_CH1 PA.00: connected to pin 1 of CN8 connector
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- TIM2_CH2 PA.01: connected to pin 2 of CN8 connector
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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