ADC_ExtLinesTrigger

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    ADC/ExtLinesTrigger/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the ADC external lines trigger 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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  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  ******************************************************************************
   
Example Description

This example describes how to trigger ADC regular and injected groups channels conversion using two external line events. Discontinuous mode is enabled for regular group channel conversion and configured to convert one regular channel on each external trigger.

ADC1 is configured to start regular group channel conversion on EXTI11 event. On detection of the first rising edge on PE.11 pin (PF.11 pin for High-Density Value line), the conversion of the first regular channel (ADC channel4) is done and its converted value is transfered by DMA to ADC_RegularConvertedValueTab table. On the following edge detection, the second regular channel (ADC channel14) is automatically converted and its converted value is stored by DMA in the same table. The number of transmitted data by DMA, in this example is limited to 64 data.

The procedure is repeated for both regular channels on each EXTI11 event. ADC1 is configured to start injected group channel conversion on EXTI15 event. On detection of the first rising edge on PE.15 pin all selected injected channels, which are two in this example (ADC channel11 and channel12), are converted and an interrupt is generated on JEOC flag rising at the end of all injected channels conversion. Both injected channels converted results are stored in ADC_InjectedConvertedValueTab table inside the interrupt routine. The procedure is repeated for injected channels on each EXTI15 event. The ADC1 clock is set to 12 MHz on Value line devices and to 14MHz on other devices.

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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