物联网工程关键技术应用 ：实时监测环境的温度和光照强度电压_物联网导论光照传感器实验流程图(2)

TR0 = 0x01;

ADCCON3 |= 0x0e;

ADCCON3 &= 0x3f;

ADCCON3 |= 0x30;

ADCCON1 |= 0x30;

ADCCON1 |= 0x40;

while(!(ADCCON1 & 0x80));

adcvalue = (uint16) ADCL;

adcvalue |= (uint16) (ADCH << 8);

adcvalue = adcvalue >> 2;

T = adcvalue * 0.06229 - 303.3 - 25;

return T;

}

4.2片外气体传感器电压值采集

uint16 sensor_val;

float volt;

float get_VL(void){

sensor_val = get_adc();

volt = (sensor_val * 3.3) / 8192;

return volt;

}

uint16 get_adc()

{

uint32 value;

adc_init();

ADCIF = 0;

ADCCON3 = (0x80 | 0x10 | 0x00);

while(!ADCIF);

value = ADCL;

value = (((uint16)ADCH) << 8);

return (uint16) value;

}

void adc_init()

{

APCFG |= 1;

P0SEL |= (1 << (0));

P0DIR &= (1 << (0));

}

4.3无线传感器网络建立

void SampleApp_SendPeriodicMessage( void )  //发送周期信息

{  //调用AF_DataRequest()函数将数据无线广播出去

if ( AF_DataRequest( &SampleApp_Periodic_DstAddr, &SampleApp_epDesc,  //发送目的地址+端点地址和传送模式

SAMPLEAPP_PERIODIC_CLUSTERID,   //被Profile指定有效的集群号

1,  //发送数据长度

(uint8*)&SampleA