/**
@page TIM_OnePulse TIM example
@verbatim
******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
* @file Examples_LL/TIM/TIM_OnePulse/readme.txt
* @author MCD Application Team
* @brief Description of the TIM_OnePulse example.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@endverbatim
@par Example Description
Configuration of a timer to generate a positive pulse in
Output Compare mode with a length of tPULSE and after a delay of tDELAY. This example
is based on the STM32F3xx TIM LL API. The peripheral initialization uses
LL unitary service functions for optimization purposes (performance and size).
The pulse is generated on OC1.
This example uses 2 timer instances:
- TIM1 generates a positive pulse of 50 us after a delay of 50 us. User push-button
is used to start TIM1 counter.
________________________ ________________________________
| |
User push-button |___|
___________
| |
OC1 ______________________________________| |________
(TIM1_CH1) <---50 us---><---50 us--->
| |_ uwMeasuredPulseLength
|_ uwMeasuredDelay
TIM1_CH1 delay and pulse length are measured every time a pulse is generated.
Both can be observed through the debugger by monitoring the variables uwMeasuredDelay and
uwMeasuredPulseLength respectively.
- TIM2 generates a positive pulse of 3 s after a delay of 2 s. TIM2 counter start
is controlled through the slave mode controller. TI2FP2 signals is selected as
trigger input meaning that TIM2 counter starts when a rising edge is detected on
TI2FP2. The TIM2 output channel is mapped on the pin PA.05 (connected to LED2 on board
STM32F334R8-Nucleo Rev C). Thus LED2 status (on/off) mirrors the timer output level (active v.s. inactive).
___
| |
TI2 _________________________| |_________________________________________
(TIM2_CH2)
___________________________
| |
OC1 ______________________________________| |____
(TIM2_CH1) <-----2s-----><----------3 s------------->
Both TIM1 and TIM2 are configured to generate a single pulse (timer counter
stops automatically at the next update event (UEV).
Connecting TIM1 OC1 to TIM2 TI2 allows to trigger TIM2 counter by pressing
the User push-button.
@par Directory contents
- TIM/TIM_OnePulse/Inc/stm32f3xx_it.h Interrupt handlers header file
- TIM/TIM_OnePulse/Inc/main.h Header for main.c module
- TIM/TIM_OnePulse/Inc/stm32_assert.h Template file to include assert_failed function
- TIM/TIM_OnePulse/Src/stm32f3xx_it.c Interrupt handlers
- TIM/TIM_OnePulse/Src/main.c Main program
- TIM/TIM_OnePulse/Src/system_stm32f3xx.c STM32F3xx system source file
@par Hardware and Software environment
- This example runs on STM32F334x8 devices.
- This example has been tested with STM32F334R8-Nucleo Rev C board and can be
easily tailored to any other supported device and development board.
- STM32F334R8-Nucleo Rev C Set-up:
- TIM1_CH1 PA.8: connected to pin 23 of CN10 connector
- TIM2_CH1 PA.05: connected to pin 11 of CN10 connector
- TIM2_CH2 PA.01: connected to pin 30 of CN7 connector
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example
*/
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