TIM_Parallel_Synchro

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    TIM/Parallel_Synchro/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the TIM Parallel_Synchro example.
  ******************************************************************************
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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  * 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 TIM peripherals in parallel mode. In this example three timers are used:

Timers synchronisation in parallel mode:

1/TIM2 is configured as Master Timer:

2/TIM3 and TIM4 are slaves for TIM2,

o For Low-density, Medium-density, High-density and Connectivity line devices: The TIMxCLK is fixed to 72 MHz, the TIM2 counter clock is 72 MHz. The Master Timer TIM2 is running at TIM2 frequency: TIM2 frequency = TIM2 counter clock/ (TIM2 period + 1) = 281.250 KHz and the duty cycle is equal to TIM2_CCR1/(TIM2_ARR + 1) = 25%.

The TIM3 is running at: (TIM2 frequency)/ (TIM3 period + 1) = 28.1250 KHz and a duty cycle equal to TIM3_CCR1/(TIM3_ARR + 1) = 30%

The TIM4 is running at: (TIM2 frequency)/ (TIM4 period + 1) = 56.250 KHz and a duty cycle equal to TIM4_CCR1/(TIM4_ARR + 1) = 60%

o For Low-Density Value line, Medium-Density Value line and High-Density Value line devices: The TIMxCLK is fixed to 24 MHz, the TIM2 counter clock is 24 MHz. TIM2 frequency = 93.75 KHz TIM3 frequency = 9.375 KHz TIM4 frequency = 18.75 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

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