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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : readme.txt
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : Description of the TIM ComplementarySignals example.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
Example description
===================
This example shows how to configure the TIM1 peripheral to generate three
complementary TIM1 signals, to insert a defined dead time value, to use the break
feature and to lock the desired parameters.
TIM1CLK is fixed to 72 MHz, the TIM1 Prescaler is equal to 0 so the TIM1 counter
clock used is 72 MHz.
TIM1 frequency is defined as follow:
TIM1 frequency = TIM1 counter clock / (TIM1_Period + 1) = 1.098 KHz.
The Three Duty cycles are computed as the following description:
TIM1 Channel1 duty cycle = TIM1_CCR1 / (TIM1_Period + 1) = 50%
TIM1 Channel1N duty cycle = (TIM1_Period - TIM1_CCR1) / (TIM1_Period + 1) = 50%
TIM1 Channel2 duty cycle = TIM1_CCR2 / (TIM1_Period + 1) = 25%
TIM1 Channel2N duty cycle = (TIM1_Period - TIM1_CCR1) / (TIM1_Period + 1) = 75%
TIM1 Channel3 duty cycle = TIM1_CCR3 / TIM1_Period = 12.5%
TIM1 Channel3N duty cycle = (TIM1_Period - TIM1_CCR3) / (TIM1_Period + 1) = 87.5%
A dead time of 1.62 us is inserted between the different complementary signals,
and the Lock level 1 is selected.
The break Polarity is used at High level.
The TIM1 waveform can be displayed using an oscilloscope.
Directory contents
==================
stm32f10x_conf.h Library Configuration file
stm32f10x_it.c Interrupt handlers
stm32f10x_it.h Interrupt handlers header file
main.c Main program
Hardware environment
====================
This example runs on STMicroelectronics STM3210B-EVAL and STM3210E-EVAL evaluation
boards and can be easily tailored to any other hardware.
There is no need for any modification when switching between these two boards.
- Connect the TIM1 pins to an oscilloscope to monitor the different waveforms:
- TIM1_CH1 pin (PA.08)
- TIM1_CH1N pin (PB.13)
- TIM1_CH2 pin (PA.09)
- TIM1_CH2N pin (PB.14)
- TIM1_CH3 pin (PA.10)
- TIM1_CH3N pin (PB.15)
- 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.
How to use it
=============
In order to make the program work, you must do the following:
- Create a project and setup all your toolchain's start-up files
- Compile the directory content files and required Library files:
+ stm32f10x_lib.c
+ stm32f10x_tim.c
+ stm32f10x_gpio.c
+ stm32f10x_rcc.c
+ stm32f10x_nvic.c
+ stm32f10x_flash.c
- Link all compiled files and load your image into target memory
- Run the example
******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE******
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