/**
@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.
******************************************************************************
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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*
******************************************************************************
@endverbatim
@par Example Description
This example shows how to configure 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 STM32F0xx TIM LL API; peripheral initialization is done
using LL unitary services functions for optimization purpose (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
STM32F072RB-Nucleo RevC). 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/stm32f0xx_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/stm32f0xx_it.c Interrupt handlers
- TIM/TIM_OnePulse/Src/main.c Main program
- TIM/TIM_OnePulse/Src/system_stm32f0xx.c STM32F0xx system source file
@par Hardware and Software environment
- This example runs on STM32F072xB devices.
- This example has been tested with STM32F072RB-Nucleo RevC board and can be
easily tailored to any other supported device and development board.
- STM32F072RB-Nucleo RevC 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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
