101 lines
4.2 KiB
Plaintext
101 lines
4.2 KiB
Plaintext
/**
|
|
@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 STM32F1xx 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:
|
|
|
|
- TIM3 generates a positive pulse of 50 us after a delay of 50 us. User push-button
|
|
is used to start TIM3 counter.
|
|
___
|
|
| |
|
|
User push-button ________________________| |________________________________
|
|
___________
|
|
| |
|
|
OC1 ______________________________________| |________
|
|
(TIM3_CH1) <---50 us---><---50 us--->
|
|
| |_ uwMeasuredPulseLength
|
|
|_ uwMeasuredDelay
|
|
|
|
TIM3_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.00.
|
|
___
|
|
| |
|
|
TI2 _________________________| |_________________________________________
|
|
(TIM2_CH2)
|
|
___________________________
|
|
| |
|
|
OC1 ______________________________________| |____
|
|
(TIM2_CH1) <-----2s-----><----------3 s------------->
|
|
|
|
|
|
|
|
Both TIM3 and TIM2 are configured to generate a single pulse (timer counter
|
|
stops automatically at the next update event (UEV).
|
|
|
|
Connecting TIM3 OC1 to TIM2 TI2 allows to trigger TIM2 counter by pressing
|
|
the User push-button.
|
|
|
|
@par Directory contents
|
|
|
|
- TIM/TIM_OnePulse/Inc/stm32f1xx_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/stm32f1xx_it.c Interrupt handlers
|
|
- TIM/TIM_OnePulse/Src/main.c Main program
|
|
- TIM/TIM_OnePulse/Src/system_stm32f1xx.c STM32F1xx system source file
|
|
|
|
|
|
@par Hardware and Software environment
|
|
|
|
- This example runs on STM32F103xB devices.
|
|
|
|
- This example has been tested with STM32F103RB-Nucleo board and can be
|
|
easily tailored to any other supported device and development board.
|
|
|
|
- STM32F103RB-Nucleo Set-up:
|
|
- TIM3_CH1 PA.06: connected to pin 5 of CN5 connector
|
|
- TIM2_CH1 PA.00: connected to pin 1 of CN8 connector
|
|
- TIM2_CH2 PA.01: connected to pin 2 of CN8 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
|
|
|
|
|
|
*/
|