[ADC]STM32 ADC驱动测试关闭通道未成功

发布于 2019-10-02 17:25:43 浏览：1487 订阅该版

最近学习RT-Thread，近期学习到设备驱动框架版块，测试了下ADC。发现STM32F103的ADC驱动中关闭ADC通道命令未成功，不知道是否我自己没匹配好板子还是驱动代码有问题，所以提出问题，大家一起看一下。

我用的是HY-RedBull的STM32开发板，板子上有个电位器对应的是PC3引脚，ADC通道为13。

外设测试代码用的peripheral_samples-v0.3.0
https://github.com/RT-Thread-packages/peripheral-sample

测试前修改了adc_vol_sample.c 文件中的宏定义
#define ADC_DEV_CHANNEL     13           /* ADC 通道 */

问题现象：关闭ADC通道后，仍能读取电压值

LOG如下：

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msh >
 \ | /
- RT -     Thread Operating System
 / | \     4.0.0 build Oct  2 2019
 2006 - 2018 Copyright by rt-thread team
msh >adc probe adc1
probe adc1 success 
msh >adc read 13
adc1 channel 13  read value is 0x000003C1 
msh >adc read 13
adc1 channel 13  read value is 0x000003BF 
msh >adc read 13
adc1 channel 13  read value is 0x000003BE 
msh >adc read 13
adc1 channel 13  read value is 0x000003BF 
msh >
msh >adc read 13
adc1 channel 13  read value is 0x000003BF 
msh >adc read 13
adc1 channel 13  read value is 0x000003BF 
msh >
msh >
msh >
msh >adc disable 13
adc1 channel 13 disable success 
msh >
msh >adc read 13
adc1 channel 13  read value is 0x000003C0 
msh >adc read 13
adc1 channel 13  read value is 0x000003C0 
msh >
msh >

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