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139 lines
6.8 KiB
Plaintext
139 lines
6.8 KiB
Plaintext
/**
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@page TIM_6Steps TIM 6 Steps example
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file TIM/TIM_6Steps/readme.txt
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* @author MCD Application Team
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* @brief Description of the TIM 6 Steps example.
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******************************************************************************
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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This example shows how to configure the TIM1 peripheral to generate 6 Steps.
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The STM32F4xx TIM1 peripheral offers the possibility to program in advance the
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configuration for the next TIM1 outputs behaviour (step) and change the configuration
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of all the channels at the same time. This operation is possible when the COM
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(commutation) event is used.
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The COM event can be generated by software by setting the COM bit in the TIM1_EGR
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register or by hardware (on TRC rising edge).
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In this example, a software COM event is generated each 1 ms: using the SysTick
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interrupt.
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The TIM1 is configured in Timing Mode, each time a COM event occurs, a new TIM1
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configuration will be set in advance. Only changed states are programmed.
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The break Polarity is used at High level.
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The following Table describes the TIM1 Channels states:
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@verbatim
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-----------------------------------------------
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| Step1 | Step2 | Step3 | Step4 | Step5 | Step6 |
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----------------------------------------------------------
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|Channel1 | 1(PWM)| 0 | 0 | 0 | 0 |1(PWM) |
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----------------------------------------------------------
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|Channel1N | 0 | 0 |1(PWM) |1(PWM) | 0 | 0 |
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----------------------------------------------------------
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|Channel2 | 0 | 0 | 0 |1(PWM) |1(PWM) | 0 |
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----------------------------------------------------------
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|Channel2N |1(PWM) |1(PWM) | 0 | 0 | 0 | 0 |
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----------------------------------------------------------
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|Channel3 | 0 |1(PWM) |1(PWM) | 0 | 0 | 0 |
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----------------------------------------------------------
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|Channel3N | 0 | 0 | 0 | 0 |1(PWM) |1(PWM) |
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-----------------------------------------------------------
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Channel1 (PA.08) |||||||_________________________________||||||||||||||_________________________________|||||||
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Channel1N (PB.13) _______________||||||||||||||||_______________________________||||||||||||||||________________
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Channel2 (PE.11) _______________________||||||||||||||||_______________________________||||||||||||||||________
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Channel2N (PB.14) |||||||||||||||________________________________|||||||||||||||________________________________
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Channel3 (PE.13) _______||||||||||||||||_______________________________||||||||||||||||________________________
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Channel3N (PB.15) ________________________________|||||||||||||||________________________________|||||||||||||||
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@endverbatim
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Keywords
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Timers, 6 steps, PWM, Duty Cycle, Waveform, Oscilloscope, Output, Signal, commutation, timing mode
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@par Directory contents
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- TIM/TIM_6Steps/Inc/stm32f4xx_hal_conf.h HAL configuration file
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- TIM/TIM_6Steps/Inc/stm32f4xx_it.h Interrupt handlers header file
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- TIM/TIM_6Steps/Inc/main.h Main program header file
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- TIM/TIM_6Steps/Src/stm32f4xx_it.c Interrupt handlers
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- TIM/TIM_6Steps/Src/main.c Main program
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- TIM/TIM_6Steps/Src/stm32f4xx_hal_msp.c HAL MSP module
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- TIM/TIM_6Steps/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F407xx/417xx devices.
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- This example has been tested with STMicroelectronics STM324xG-EVAL RevC
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evaluation boards and can be easily tailored to any other supported device and development board
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- STM324xG-EVAL RevC Set-up
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- Connect the TIM1 pins to an oscilloscope to monitor the different waveforms:
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- TIM1_CH1 pin (PA.08)
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- TIM1_CH1N pin (PB.13)
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- TIM1_CH2 pin (PE.11)
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- TIM1_CH2N pin (PB.14)
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- TIM1_CH3 pin (PE.13)
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- TIM1_CH3N pin (PB.15)
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- Connect TIM1 break pin TIM1_BKIN pin (PB.12) to the GND. To break outputs,
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switch the level from 0V to 3.3V.
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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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* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
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*/
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