【Arch BLE】实验三 蓝牙实验

12345liyunyun

本次实验是该系列实验的第三个，测试Arch BLE蓝牙功能。

一、实验目的
1.了解mbed的库函数
2.掌握Arch BLE蓝牙配置

二、实验基本要求 
1. 阅读和理解官方wiki上的资源
2. 通过实验用蓝牙控制RGB灯

三、实验环境  
硬件平台：Arch BLE，RGB灯以及杜邦线若干
软件平台：mbed

四、实验内容 
1.软件平台搭建
a)首先在mbed官网注册帐号：https://developer.mbed.org
b)安装mbed驱动，可支持虚拟串口：https://developer.mbed.org/handbook/Windows-serial-configuration

2. 硬件平台：
参照实验一的连接。

3.实验测试代码

/* BLE Color Pixels
 */

#include "mbed.h"
#include "BLEDevice.h"
#include "UARTService.h"
#include "color_pixels.h"

#define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
                               * it will have an impact on code-size and power consumption. */

#if NEED_CONSOLE_OUTPUT
Serial  pc(USBTX, USBRX);
#define DEBUG(...) { pc.printf(__VA_ARGS__); }
#else
#define DEBUG(...) /* nothing */
#endif /* #if NEED_CONSOLE_OUTPUT */

ColorPixels pixels(1, 32);

BLEDevice  ble;
DigitalOut led1(LED1);

//add 2016/1/2
DigitalOut gled(p10);
DigitalOut rled(p11);
DigitalOut bled(p12);

UARTService *uartServicePtr;
 

void processPacket(uint8_t *packet)
{
    uint8_t red = packet[0];
    uint8_t green = packet[1];
    uint8_t blue = packet[2];
    
    uint8_t mode = packet[3];
    
    uint8_t number = packet[4] - 1;
    
    mode = mode & 1;
    
    DEBUG("r: %d, g: %d, b: %d, mode: %dnr", red, green, blue, mode);
    
    if (mode == 0) {
        pixels.set_color(number, red, green, blue);
        pixels.update();
        gled = 1;  //add 2016/1/2
        rled = 1;
        bled = 1;
    } else if (mode == 1) {
        for (int i = 0; i < 32; i++) {
            pixels.set_color(i, red, green, blue);
        }
        pixels.update();
        //add 2016/1/2
        for(int cnt = 0; cnt < 1000; cnt++)
        {
            gled = ((cnt%8)>>0)&1;
            rled = ((cnt%8)>>1)&1;
            bled = ((cnt%8)>>2)&1;
            wait_ms(200);
        }
    } else if (mode == 2) {

    } else {
        
    }
    
}

void disconnectionCallback(Gap::Handle_t handle, Gap:isconnectionReason_t reason)
{
    DEBUG("Disconnected!nr");
    
    DEBUG("Restarting the advertising processnr");
    ble.startAdvertising();
}

void onDataWritten(const GattCharacteristicWriteCBParams *params)
{
    if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
        uint16_t bytesRead = params->len;
        DEBUG("received %u bytesnr", bytesRead);
        ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
        processPacket((uint8_t *)params->data);
    }
}

void periodicCallback(void)
{
    led1 = !led1; /* Do blinky on LED1 while we\'re waiting for BLE events */
}

int main(void)
{
    led1 = 1;
    gled = 1;  //add 2016/1/2
    rled = 1;
    bled = 1;
    Ticker ticker;
    ticker.attach(periodicCallback, 1);
    
    pixels.clear();
    pixels.set_color(0, 255, 0, 0);
    pixels.set_color(0, 0, 255, 0);
    pixels.set_color(0, 0, 0, 255);
    pixels.update();

    DEBUG("Initialising the nRF51822nr");
    ble.init();
    ble.onDisconnection(disconnectionCallback);
    ble.onDataWritten(onDataWritten);
 
    /* setup advertising */
    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                     (const uint8_t *)"Color Pixels", sizeof("Color Pixels") - 1);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                     (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
 
    ble.setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000));
    ble.startAdvertising();
 
    UARTService uartService(ble);
    uartServicePtr = &uartService;
 
    while (true) {
        ble.waitForEvent();
    }
}

4.测试结果

通过手机APP上的模式切换来控制RGB灯进行循环闪烁，由于就一个手机，没法拍视频，这里就不上视频了。