mbed列--基于飞思卡尔FRDM KL25Z鼠标设计的高速实现

==========================================================

原创文章转载请注明：blog.csdn.net/guo8113

==========================================================================

说明：

今天接着上次的mbedproject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。因为FRDM25Z上没有按键，只实现了鼠标的移动。

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參考mbed试玩—高速开发MCU应用（基于FRDM-KL25Z）。

实现步骤：

1.新建project，导入对应的库（在线有提供的库）：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvODExMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="">

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，事实上这个功能用不到RTOS。可导入的库有：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3VvODExMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="">

3.新建并编写main函数：最终能够上代码了：

#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。。。。