问题如下：Arduino:1.8.5 (Windows 10), 开发板："Arduino/Genuino Uno"
C:\Program Files (x86)\Arduino\libraries\Adafruit_Circuit_Playground\utility\Adafruit_CPlay_Mic.cpp: In member function 'int Adafruit_CPlay_Mic::peak(uint16_t)':
C:\Program Files (x86)\Arduino\libraries\Adafruit_Circuit_Playground\utility\Adafruit_CPlay_Mic.cpp:28:37: error: 'analogPinToChannel' was not declared in this scope
channel = analogPinToChannel(4); // Pin A4 to ADC channel
^
C:\Program Files (x86)\Arduino\libraries\Adafruit_Circuit_Playground\utility\Adafruit_CPlay_Mic.cpp: In member function 'void Adafruit_CPlay_Mic::capture(int16_t*, uint8_t)':
C:\Program Files (x86)\Arduino\libraries\Adafruit_Circuit_Playground\utility\Adafruit_CPlay_Mic.cpp:89:37: error: 'analogPinToChannel' was not declared in this scope
channel = analogPinToChannel(4); // Pin A4 to ADC channel
^
exit status 1
为开发板 Arduino/Genuino Uno 编译时出错。
在文件 -> 首选项开启
“编译过程中显示详细输出”选项
这份报告会包含更多信息。