TIM_ExtTrigger_Synchro

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    TIM/ExtTrigger_Synchro/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the TIM ExTrigger_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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  ******************************************************************************
   
Example Description

This example shows how to synchronize TIM peripherals in cascade mode with an external trigger. In this example three timers are used:

1/TIM1 is configured as Master Timer:

2/TIM1 is configured as Slave Timer for an external Trigger connected to TIM1 TI2 pin (TIM1 CH2 configured as input pin):

3/TIM3 is slave for TIM1 and Master for TIM4,

4/TIM4 is slave for TIM3,

For Low-density, Medium-density, High-density and Connectivity line devices: The TIMxCLK is fixed to 72 MHZ, the Prescaler is equal to 2 so the TIMx clock counter is equal to 24 MHz. The Three Timers are running at: TIMx frequency = TIMx clock counter/ 2*(TIMx_Period + 1) = 162.1 KHz.

For Low-Density Value line, Medium-Density Value line and High-Density Value line devices: The TIMxCLK is fixed to 24 MHz, the Prescaler is equal to 2 so the TIMx clock counter is equal to 8 MHz. TIMx frequency = TIMx clock counter/ 2*(TIMx_Period + 1) = 54 KHz.

The starts and stops of the TIM1 counters are controlled by the external trigger. The TIM3 starts and stops are controlled by the TIM1, and the TIM4 starts and stops are controlled by the TIM3.

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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