readme.txt

stm32 cortexm－3 adc实例程序

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : readme.txt
* Author             : MCD Application Team
* Version            : V1.0
* Date               : 10/08/2007
* Description        : Description of the ADC Example2.
********************************************************************************
* THE PRESENT SOFTWARE 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,
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
本例展示了如何利用高级控制定时器（TIM1）来触发模数转换器（ADC）和利用自动注入转换功能来触发注入转换。

在每一个TIM1的上升沿，ADC对通道14（ADC Channel14）上的输入做一次规则转换，然后，DMA会将寄存器ADC_DR1中数据传送到内存中相应的表格。

使能自动注入转换功能，ADC能够在通道14的规则转换之后自动对通道11（ADC Channel11）上的输入做一次注入转换。随后产生一个ADC中断，并置标志位JEOC。在中断中将注入转换结果存入ADC_InjectedConvertedValueTab。

整个过程将重复32次，之后失能TIM1，ADC的转换也随之停止。

和示例1一样，为了使本示例能在STM3210B-LK1上运行，将通道14改为通道10，通道11则保持不变。并且选择结果列表（ADC_RegularConvertedValueTab和ADC_InjectedConvertedValueTab）中的2个数值把它们交替显示在LCD屏幕上。

Example description
===================
This example describes how to convert ADC regular group channels continuously using
TIM1 external trigger and injected group channels using the auto-injected feature.
The ADC is configured to convert on each TIM1 rising edge ADC channel14.
Each time an end of regular conversion occurs the DMA transfers, the converted data 
from ADC1 DR register to the ADC_RegularConvertedValueTab table. 
Enabling the auto-injected feature, permit to convert automatically the injected 
channel ADC channel11 after the end of the regular channel14. An ADC interrupt is 
generated then by JEOC flag at the end of the injected channel conversion and in 
the interrupt routine the result is stored in the ADC_InjectedConvertedValueTab table.
The procedure is repeated 32 times then the TIM1 peripheral is disabled and thus, 
no conversion will be done neither regular or injected.
TIM1 start conversion triggers can be visualized on oscilloscope on PA.08 and at the
same time the toggle of pin PC06 which indicates the automatic auto-injection 
conversion.
The ADC1 clock is set to 14 MHz.


Directory contents
==================
stm32f10x_conf.h  Library Configuration file
stm32f10x_it.c    Interrupt handlers
stm32f10x_it.h    Interrupt handlers header file
main.c            Main program


Hardware environment
====================
 - Connect a known voltage, between 0-3.3V, to ADC Channel14 mapped on pin PC.04
   (potentiometer RV1 on STM3210B-EVAL board) and ADC Channel11 mapped on pin PC.01
   
      
How to use it
=============
In order to make the program work, you must do the following :
- Create a project and setup all your toolchain's start-up files
- Compile the directory content files and required Library files :
  + stm32f10x_lib.c
  + stm32f10x_adc.c
  + stm32f10x_dma.c
  + stm32f10x_tim1.c
  + stm32f10x_gpio.c
  + stm32f10x_rcc.c
  + stm32f10x_nvic.c
  + stm32f10x_flash.c
  
- Link all compiled files and load your image into either RAM or FLASH
- Run the example


******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE******