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/**
@page TIM_6steps Timers Synchronization example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file TIM/TIM_6steps/readme.txt
* @author MCD Application Team
* @brief Description of the TIM 6 Steps 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
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
@endverbatim
@par Example Description
This example shows how to configure the TIM1 peripheral to generate 6 Steps.
The STM32F446xx TIM1 peripheral offers the possibility to program in advance the
configuration for the next TIM1 outputs behaviour (step) and change the configuration
of all the channels at the same time. This operation is possible when the COM
(commutation) event is used.
The COM event can be generated by software by setting the COM bit in the TIM1_EGR
register or by hardware (on TRC rising edge).
In this example, a software COM event is generated each 1 ms: using the SysTick
interrupt.
The TIM1 is configured in Timing Mode, each time a COM event occurs, a new TIM1
configuration will be set in advance. Only changed states are programmed.
The break Polarity is used at High level.
The following Table describes the TIM1 Channels states:
@verbatim
-----------------------------------------------
| Step1 | Step2 | Step3 | Step4 | Step5 | Step6 |
----------------------------------------------------------
|Channel1 | 1(PWM)| 0 | 0 | 0 | 0 |1(PWM) |
----------------------------------------------------------
|Channel1N | 0 | 0 |1(PWM) |1(PWM) | 0 | 0 |
----------------------------------------------------------
|Channel2 | 0 | 0 | 0 |1(PWM) |1(PWM) | 0 |
----------------------------------------------------------
|Channel2N |1(PWM) |1(PWM) | 0 | 0 | 0 | 0 |
----------------------------------------------------------
|Channel3 | 0 |1(PWM) |1(PWM) | 0 | 0 | 0 |
----------------------------------------------------------
|Channel3N | 0 | 0 | 0 | 0 |1(PWM) |1(PWM) |
-----------------------------------------------------------
Channel1 (PA.08) |||||||_________________________________||||||||||||||_________________________________|||||||
Channel1N (PB.13) _______________||||||||||||||||_______________________________||||||||||||||||________________
Channel2 (PA.09) _______________________||||||||||||||||_______________________________||||||||||||||||________
Channel2N (PB.14) |||||||||||||||________________________________|||||||||||||||________________________________
Channel3 (PA.10) _______||||||||||||||||_______________________________||||||||||||||||________________________
Channel3N (PB.15) ________________________________|||||||||||||||________________________________|||||||||||||||
@endverbatim
@par Keywords
Timers, 6 steps, PWM, Duty Cycle, Waveform, Oscilloscope, Output, Signal, commutation, timing mode
@par Directory contents
- TIM/TIM_6steps/Inc/stm32f4xx_hal_conf.h HAL configuration file
- TIM/TIM_6steps/Inc/stm32f4xx_it.h Interrupt handlers header file
- TIM/TIM_6steps/Inc/main.h Header for main.c module
- TIM/TIM_6steps/Src/stm32f4xx_it.c Interrupt handlers
- TIM/TIM_6steps/Src/main.c Main program
- TIM/TIM_6steps/Src/stm32f4xx_hal_msp.c HAL MSP file
- TIM/TIM_6steps/Src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This example runs on STM32F446xx devices.
- This example has been tested with STM32446E-EVAL board and can be
easily tailored to any other supported device and development board.
- STM32446E-EVAL Set-up
Connect the following pins to an oscilloscope to monitor the different waveforms:
- TIM1_CH1 pin PA.08(pin 1 in CN6 connector)
- TIM1_CH1N pin PB.13
- TIM1_CH2 pin PA.09
- TIM1_CH2N pin PB.14(Pin 7 in CN6 connector)
- TIM1_CH3 pin PA.10
- TIM1_CH3N pin PB.15(pin 5 in CN6 connector)
- Connect the TIM1 break pin TIM1_BKIN pin (PB.12) to the GND. To generate a
break event, switch this pin level from 0V to 3.3V.
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files: Project->Rebuild all
- Load project image: Project->Download and Debug
- Run program: Debug->Go(F5)
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/