TIM_TIM1_Synchro

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    TIM/TIM1_Synchro/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the TIM TIM1_Synchro 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 synchronize TIM1 and Timers (TIM3 and TIM4) in parallel mode.

Timers synchronisation in parallel mode:

1/ TIM1 is configured as Master Timer:

2/ TIM3 and TIM4 are slaves for TIM1,

o For Low-density, Medium-density, High-density and Connectivity line devices: The TIMxCLK is fixed to 72 MHz, Prescaler = 0 so the TIM1 counter clock is 72 MHz.

The Master Timer TIM1 is running at: TIM1 frequency = TIM1 counter clock / (TIM1_Period + 1) = 281.250 KHz and the duty cycle is equal to: TIM1_CCR1/(TIM1_ARR + 1) = 50%

The TIM3 is running at: (TIM1 frequency)/ ((TIM3 period +1)* (Repetion_Counter+1)) = 18.750 KHz and a duty cycle equal to TIM3_CCR1/(TIM3_ARR + 1) = 33.3%

The TIM4 is running at: (TIM1 frequency)/ ((TIM4 period +1)* (Repetion_Counter+1)) = 28.125 KHz and a duty cycle equal to TIM4_CCR1/(TIM4_ARR + 1) = 50%

o For Value line devices: The TIMxCLK is fixed to 24 MHz, Prescaler = 0 so the TIM1 counter clock is 24 MHz. TIM1 frequency = 93.75 KHz TIM3 frequency = 6.25 KHz TIM4 frequency = 9.375 KHz

Directory contents
Hardware and Software environment
How to use it ?

In order to make the program work, you must do the following:

Tip: You can tailor the provided project template to run this example, for more details please refer to "stm32f10x_stdperiph_lib_um.chm" user manual; select "Peripheral Examples" then follow the instructions provided in "How to proceed" section.

Note:
  • Low-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
  • Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
  • Medium-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
  • Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
  • High-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
  • High-density devices are STM32F101xx and STM32F103xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
  • XL-density devices are STM32F101xx and STM32F103xx microcontrollers where the Flash memory density ranges between 512 and 1024 Kbytes.
  • Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.

© COPYRIGHT 2010 STMicroelectronics

STM32F10x Standard Peripherals Library: Footer

 

 

 

      For complete documentation on STM32(CORTEX M3) 32-bit Microcontrollers platform visit  www.st.com/STM32