==========================================================
原创文章转载请注明:blog.csdn.net/guo8113
==========================================================================
说明:
今天接着上次的mbed工程又玩弄了一番,实现了基于mbed RTOS以及三轴重力传感器的鼠标,当然了,由于FRDM25Z上没有按键,仅仅实现了鼠标的移动。
在这个系统中更是充分体现了mbed的方便快捷,分分钟钟几行代码搞定了一个飞鼠的设计。
mbed的在线编译工具不会用的参考mbed试玩—快速开发MCU应用(基于FRDM-KL25Z)。
实现步骤:
1.新建工程,导入相应的库(在线有提供的库):
导入库时通过import 导入;
2.为了好玩我把TSI(触摸按键),mbed RTOS、LED、Timer都导入了,其实这个功能用不到RTOS。可导入的库有:
3.新建并编写main函数:终于可以上代码了:
#include "mbed.h" #include "rtos.h" #include "MMA8451Q.h" #include "USBMouse.h" #include "tsi_sensor.h" //MMA8451Q definiation #if defined (TARGET_KL25Z) || defined (TARGET_KL46Z) PinName const SDA = PTE25; PinName const SCL = PTE24; #elif defined (TARGET_KL05Z) PinName const SDA = PTB4; PinName const SCL = PTB3; #elif defined (TARGET_K20D50M) PinName const SDA = PTB1; PinName const SCL = PTB0; #else #error TARGET NOT DEFINED #endif #define MMA8451_I2C_ADDRESS (0x1d<<1) // #if defined (TARGET_KL25Z) || defined (TARGET_KL46Z) #define ELEC0 9 #define ELEC1 10 #elif defined (TARGET_KL05Z) #define ELEC0 9 #define ELEC1 8 #else #error TARGET NOT DEFINED #endif MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS); Ticker tick; PwmOut rled(LED1); PwmOut gled(LED2); PwmOut bled(LED3); TSIAnalogSlider tsi(ELEC0, ELEC1, 40); USBMouse mouse; //InterruptIn sw2(SW2); //thread pointer Thread *thread2; float x=0, y=0, z=0,t=0; //intruppt void sw2_press(void) { thread2->signal_set(0x1); } void led_thread(void const *argument) { while (true) { rled = abs(1.0f - x -t); gled = abs(1.0f - y -t); bled = abs(1.0f - z -t); Thread::wait(50); } } void scan_thread(void const *argument) { while (true) { Thread::signal_wait(0x1); // x = abs(acc.getAccX()); // y = abs(acc.getAccY()); // z = abs(acc.getAccZ()); x = acc.getAccX(); y = acc.getAccY(); z = acc.getAccZ(); t = tsi.readPercentage(); } } int main() { Thread thread(led_thread); thread2 = new Thread(scan_thread); // sw2.fall(&sw2_press); tick.attach(&sw2_press,0.001); //scan MMA8451Q ervery 0.01s while (true) { Thread::wait(1); mouse.move( y*127,x*127); printf("\r\n 0.1 seconds passed: %f,%f,%f,%f \r\n", x,y,z,t); fflush(stdout); } }
OK ,大功告成,连接USB线到板子上的USB KL25Z到PC,PC识别USB输入设备,鼠标动了。。。。
时间: 2024-10-25 21:54:13