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118 lines
5.4 KiB
Plaintext
118 lines
5.4 KiB
Plaintext
/**
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@page TIM_6steps Timers Synchronization 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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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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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 STM32F469xx 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 (PA.07) _______________||||||||||||||||_______________________________||||||||||||||||________________
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Channel2 (PA.09) _______________________||||||||||||||||_______________________________||||||||||||||||________
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Channel2N (PB.00) |||||||||||||||________________________________|||||||||||||||________________________________
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Channel3 (PE.13) _______||||||||||||||||_______________________________||||||||||||||||________________________
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Channel3N (PB.01) ________________________________|||||||||||||||________________________________|||||||||||||||
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@endverbatim
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@note The connection of the LCD reset pin to a dedicated GPIO PK7 instead of the STM32F469 NRST pin may cause residual display on LCD with applications/examples that do not require display.
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The LCD clear can be ensured by hardware through the boards power off/power on or by software calling the BSP_LCD_Reset() function.
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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 Header for main.c module
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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 file
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- TIM/TIM_6steps/Src/system_stm32f4xx.c STM32F4xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F469xx/STM32F479xx devices.
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- This example has been tested and validated with STMicroelectronics STM32469I-EVAL RevC board and can be
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easily tailored to any other supported device and development board.
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- STM32469I-EVAL Set-up
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Connect the following pins to an oscilloscope to monitor the different waveforms:
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- TIM1_CH1 pin (PA.08, pin 52 of CN6 connector)
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- TIM1_CH1N pin (PA.07, pin 22 of CN5 connector)
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- TIM1_CH2 pin (PA.09, pin 43 of CN6 connector)
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- TIM1_CH2N pin (PB.00, pin 52 of CN5 connector)
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- TIM1_CH3 pin (PE.13, pin 19 of CN10 connector)
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- TIM1_CH3N pin (PB.01, pin 26 of CN5 connector)
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- Connect the TIM1 break pin TIM1_BKIN pin (PA.06) to the GND. To generate a
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break event, switch this pin 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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*/
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