USART_MultiProcessor

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    USART/MultiProcessor/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the USART Multi Processor 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 provides a description of how to use the USART in multi-processor mode. USARTy and USARTz can be USART1 and USART2 or USART2 and USART3 respectively, depending on the STMicroelectronics EVAL board you are using.

First, the USARTy and USARTz address are set to 0x1 and 0x2. The USARTy send continusouly the character 0x33 to the USARTz. The USARTz toggle LED1, LED2, LED3 and LED4 pins while receiving 0x33.

When a falling edge is applied on BUTTON_KEY EXTI line, an interrupt is generated and in the EXTI9_5_IRQHandler routine, the USARTz is entered in mute mode and still in this mode (no LED toggling) until a rising edge is applied on BUTTON_WAKEUP EXTI Line 0. In this interrupt routine the USARTy send the character of address mark (0x102) to wakeup USARTz. The LED restart toggling.

USARTy and USARTz configured as follow:

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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