arduino+STC89C52RC+nRF24L01制作远程测温系统

断断续续使用3天的时间,终于弄明白nRF24L01无线传输芯片的原理,可以让两块不同型号的芯片进行远程数据交换.

下面的这幅图片使用这个芯片进行温度传输.其中89C52RC+DS18B20作温度采集终端,由nRF24L01发送至arduino最后传送到PC和processing交互..

最后尝试使用电池盒作为电源,发现在距离20米开外的地方也能保证数据传输的准确性,说明这块无线芯片确实性能不错.

以下是其发送和接受的源代码,供有意向的人使用:

STC89C52RC发送代码#include reg52.h>#include intrins.h>typedef unsigned char uchar;typedef unsigned char uint;//****************************************IO端口定义sbit  MISO =P1^2;sbit  MOSI =P3^2;sbit SCK     =P1^6;sbit CE     =P1^5;sbit CSN  =P1^7;sbit IRQ  =P1^3;　　　　//实际上该端口并未使用//*****************************************DS1820端口设置sbit      DQ=P2^7   ;//************************************数码管位选sbit led3=P2^0;sbit led2=P2^1;sbit led1=P2^2;sbit led0=P2^3;//***********************************数码管0-9编码uchar seg[10]=

{0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};          

//0~9段码(采用共阴四位数码管)uchar seg1[10]={0xBF,0x86,0xcD4,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF}; 

//加上小数点点后的段码uchar data temp_data[2]={0x00,0x00};          //温度采集数据缓冲区uchar display[7];               //显示缓冲区//uint  bdata sta;       //NRF24L01状态标志sbit RX_DR =sta^6;    sbit TX_DS =sta^5;sbit MAX_RT =sta^4;//******NRF24L01#define TX_ADR_WIDTH    5    // 本机地址宽度设置#define RX_ADR_WIDTH    5    // 接收方地址宽度设置#define TX_PLOAD_WIDTH  16   // 16 字节数据长度#define RX_PLOAD_WIDTH  16  // 16 字节数据长度uint const TX_ADDRESS[TX_ADR_WIDTH]= {0x34,0x43,0x10,0x10,0x01}; //本地地址uint const RX_ADDRESS[RX_ADR_WIDTH]= {0x34,0x43,0x10,0x10,0x01}; //接收地址//*****************************NRF24L01寄存器指令，详细请对照，Page18#define READ_REG        0x00   // 读寄存器指令#define WRITE_REG       0x20  // 写寄存器指令#define RD_RX_PLOAD     0x61   // 读取接收数据指令#define WR_TX_PLOAD     0xA0   // 写待发数据指令#define FLUSH_TX        0xE1  // 冲洗发送 FIFO指令#define FLUSH_RX        0xE2   // 冲洗接收 FIFO指令#define REUSE_TX_PL     0xE3   // 定义重复装载数据指令#define NOP             0xFF   // 保留//****************************SPI(nRF24L01)寄存器地址，详细请对照，Page18-24#define CONFIG          0x00   // 配置收发状态，CRC校验模式以及收发状态响应方式#define EN_AA           0x01   // 自动应答功能设置#define EN_RXADDR       0x02   // 可用信道设置#define SETUP_AW        0x03   // 收发地址宽度设置#define SETUP_RETR      0x04   // 自动重发功能设置#define RF_CH           0x05   // 工作频率设置#define RF_SETUP        0x06   // 发射速率、功耗功能设置#define STATUS          0x07   // 状态寄存器#define OBSERVE_TX      0x08   // 发送监测功能#define CD              0x09   // 地址检测          #define RX_ADDR_P0      0x0A   // 频道0接收数据地址#define RX_ADDR_P1      0x0B   // 频道1接收数据地址#define RX_ADDR_P2      0x0C   // 频道2接收数据地址#define RX_ADDR_P3      0x0D   // 频道3接收数据地址#define RX_ADDR_P4      0x0E   // 频道4接收数据地址#define RX_ADDR_P5      0x0F   // 频道5接收数据地址#define TX_ADDR         0x10   // 发送地址寄存器#define RX_PW_P0        0x11   // 接收频道0接收数据长度#define RX_PW_P1        0x12   // 接收频道0接收数据长度#define RX_PW_P2        0x13   // 接收频道0接收数据长度#define RX_PW_P3        0x14   // 接收频道0接收数据长度#define RX_PW_P4        0x15   // 接收频道0接收数据长度#define RX_PW_P5        0x16   // 接收频道0接收数据长度#define FIFO_STATUS     0x17   // FIFO栈入栈出状态寄存器设置//************************************NRF24L01函数申明void Delay(unsigned int s);void inerDelay_us(unsigned char n);void init_NRF24L01(void);uint SPI_RW(uint uchar);uchar SPI_Read(uchar reg);void SetRX_Mode(void);uint SPI_RW_Reg(uchar reg, uchar value);uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars);uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars);unsigned char nRF24L01_RxPacket(unsigned char* rx_buf);void nRF24L01_TxPacket(unsigned char * tx_buf);//************************************DS18B20函数申明void delay1(uint i);void ds_reset(void);void write_byte(uchar value);uchar read_byte(void);void read_temp();void work_temp();//*****************************************长延时void Delay(unsigned int s){unsigned int i;for(i=0; is; i++);for(i=0; is; i++);}//*延时函数/void inerDelay_us(unsigned char n){for(;n>0;n--)_nop_();}///*NRF24L01初始化//void init_NRF24L01(void){inerDelay_us(100);CE=0; CSN=1;  SCK=0;  SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH);    

// 写本地地址 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); 

// 写接收端地址SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); 

//设置接收数据长度，本次设置为4字节SPI_RW_Reg(WRITE_REG + RX_PW_P1, RX_PLOAD_WIDTH); 

//设置接收数据长度，本次设置为4字节}//*函数：uint SPI_RW(uint uchar)/*功能：NRF24L01的SPI写时序,详细看时序图，Page19/uint SPI_RW(uint uchar){uint bit_ctr;for(bit_ctr=0;bit_ctr8;bit_ctr++) // output 8-bit{MOSI = (uchar  0x80);         // output 'uchar', MSB to MOSIuchar = (uchar  1);           // shift next bit into MSB..SCK = 1;                      // Set SCK high..uchar |= MISO;           // capture current MISO bitSCK = 0;                // ..then set SCK low again}return(uchar);               // return read uchar}//*函数：uchar SPI_Read(uchar reg)/*功能：NRF24L01的SPI时序,详细看时序图，Page19/uchar SPI_Read(uchar reg){uchar reg_val;CSN = 0;                // CSN low, initialize SPI communication...SPI_RW(reg);            // Select register to read from..reg_val = SPI_RW(0);    // ..then read registervalueCSN = 1;                // CSN high, terminate SPI communicationreturn(reg_val);        // return register value}//*功能：NRF24L01读写寄存器函数,/uint SPI_RW_Reg(uchar reg, uchar value){uint status;CSN = 0;                   // CSN low, init SPI transactionstatus = SPI_RW(reg);      // select registerSPI_RW(value);             // ..and write value to it..CSN = 1;                   // CSN high againreturn(status);            // return nRF24L01 status uchar}//*函数：uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars)/*功能: 用于读数据，reg：为寄存器地址，pBuf：为待读出数据地址，uchars：读出数据的个数/uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars){uint status,uchar_ctr;CSN = 0;                      // Set CSN low, init SPI tranactionstatus = SPI_RW(reg);         

// Select register to write to and read status ucharfor(uchar_ctr=0;uchar_ctruchars;uchar_ctr++)pBuf[uchar_ctr] = SPI_RW(0);    //CSN = 1;                          return(status);                    // return nRF24L01 status uchar}//*功能: 用于写数据：为寄存器地址，pBuf：为待写入数据地址，uchars：写入数据的个数/uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars){uint status,uchar_ctr;CSN = 0;            //SPI使能      status = SPI_RW(reg);  for(uchar_ctr=0; uchar_ctruchars; uchar_ctr++) //SPI_RW(*pBuf++);CSN = 1;           //关闭SPIreturn(status);    //}//*功能：发送 tx_buf中数据/void nRF24L01_TxPacket(unsigned char * tx_buf){CE=0;   //StandBy I模式 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); 

// 装载接收端地址SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH);     // 装载数据 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0A);      

// IRQ收发完成中断响应，8位CRC，主发送CE=1;   //置高CE，激发数据发送inerDelay_us(10);}//void delay1(uint i){for(;i>0;i--);  }//***********************DS1820复位函数void ds_reset(void){char temp=1;while(temp){while(temp){DQ=1;_nop_();_nop_();DQ=0;delay1(80);DQ=1;delay1(9);temp=DQ;}delay1(64);temp=~DQ; }DQ=1;}//**************DS1820写函数void write_byte(uchar value){uchar i;for(i=8;i>0;i--){DQ=1;_nop_();_nop_();DQ=0;_nop_();_nop_();_nop_();_nop_();_nop_();DQ=value0x01;delay1(9);value>>=1;}DQ=1;delay1(1);}//****************DS1820读函数

uchar read_byte(void){uchar i;uchar value1=0;for(i=8;i>0;i--){DQ=1;_nop_();_nop_();value1>>=1;DQ=0;_nop_();_nop_();_nop_();_nop_();DQ=1;_nop_();_nop_();_nop_();_nop_();if(DQ)value1|=0x80;delay1(9);}DQ=1;return(value1);}//****************读取温度void read_temp(){ds_reset();write_byte(0xcc);write_byte(0xbe);temp_data[0]=read_byte();temp_data[1]=read_byte();ds_reset();write_byte(0xcc);write_byte(0x44);//*****************温度处理void work_temp(){uchar n=0;if(temp_data[1]>127){temp_data[1]=(256-temp_data[1]);   //负值temp_data[0]=(256-temp_data[0]);n=1;}display[6]=((temp_data[0]0xf0)>>4)|((temp_data[1]0x0f)4);display[5]=display[6]/100;    //百位display[4]=display[6]%100;    //display[2]=display[4]/10;    //十位display[1]=display[4]%10;    //个位 switch (temp_data[0]0x0f)    //小数位{case 0x0f:display[0]=9;break;case 0x0e:display[0]=9;break;case 0x0d:display[0]=8;break;case 0x0c:display[0]=8;break;case 0x0b:display[0]=7;break;case 0x0a:display[0]=6;break;case 0x09:display[0]=6;break;case 0x08:display[0]=5;break;case 0x07:display[0]=4;break;case 0x06:display[0]=4;break;case 0x05:display[0]=3;break;case 0x04:display[0]=3;break;case 0x03:display[0]=2;break;case 0x02:display[0]=1;break;case 0x01:display[0]=1;break;case 0x00:display[0]=1;break;default:break;}if(n)          //负值时显示aa,正直显示dd{display[3]=0x11;     }else  display[3]=0x22;}//**********温度显示void disdignit(){P0=0x39;led0=0;delay1(40);led0=1;P0=seg[display[0]];led1=0;delay1(40);led1=1;P0=seg1[display[1]];led2=0;delay1(40);led2=1;P0=seg[display[2]];led3=0;delay1(40);led3=1;}//*************主函数void main(void){uchar i=0;init_NRF24L01() ;     //NRF24L01初始化配置ds_reset();write_byte(0xcc);write_byte(0x44);Delay(6000);while(1){if(i==3){i=0;read_temp();work_temp();delay1(500);}i++;disdignit();nRF24L01_TxPacket(display);SPI_RW_Reg(WRITE_REG+STATUS,0XFF); }}arduino接收代码/*** An Mirf example which copies back the data it recives.** Pins:* Hardware SPI:* MISO -> 12* MOSI -> 11* SCK -> 13** Configurable:* CE -> 8* CSN -> 7**/#include Spi.h>#include mirf.h>#include nRF24L01.h>void setup(){Serial.begin(9600);Mirf.init();unsigned char rx_addr[5] = {0x34,0x43,0x10,0x10,0x01  };Mirf.setRADDR(rx_addr);Mirf.payload = 16;Mirf.channel = 2;Mirf.config();Serial.print("channel=");Serial.println(Mirf.channel,DEC);Serial.print("payload=");Serial.println(Mirf.payload,DEC);for(int i=0;i5;i++){Serial.print("addr[");Serial.print(i);Serial.print("]=");Serial.println(rx_addr[i],HEX);}Serial.println("Listening...");}void loop(){byte data[Mirf.payload];if(Mirf.dataReady()){do{Mirf.getData(data);Serial.print("temp: ");Serial.print(data[2],DEC);Serial.print(data[1],DEC);Serial.print(".");Serial.println(data[0],DEC);}while(!Mirf.rxFifoEmpty());}}