LinkSprite Mbed BLE Sensors tag开发板评测（二）—— 按键及蜂鸣器

unmwcq · 发表于 2017-7-31 08:51:14

1.按键引脚的定义。
The key1 is connected to P0.28 pin, and key2 is connected to P0.29 pin.

1.蜂鸣器引脚的定义。

BLE SENSORS TAG board provides a passive buzzer, and its frequency is about 1KHz. The buzzer is drove by 2N7002 MOS transistor. The control port is connected to P0.22 pin .
之后实现功能是key1按下，蜂鸣器响起，蓝色灯亮；key1按下，蜂鸣器响起，红色灯亮，

<span style="font-size: 14px;"><span style="font-size: 12px; font-weight: normal;">#include "mbed.h" DigitalOut LED_R(P0_20); DigitalOut LED_G(P0_19); DigitalIn key1(P0_28); DigitalIn key2(P0_29); DigitalOut buzzer(P0_22); int main() { while(1) { if(!key1) { wait_ms(10); if(!key1) LED_G=0; buzzer=!buzzer; wait_ms(5); } else LED_G=1; if(!key2) { wait_ms(10); if(!key2) LED_R=0; buzzer=!buzzer; wait_ms(5); } else LED_R=1; } } </span></span>

蓝牙部分之后在弄一下，找个官方例子只是简单的出来个时间的读取！

LinkSprite Mbed BLE Sensors tag开发板 评测（二）—— 按键及蜂鸣器

LinkSprite Mbed BLE Sensors tag开发板评测（二）—— 按键及蜂鸣器