基于单片机C8051F340和RF905的无线遥控传输程序，本程序是控制航模电调的遥控发射程序

// SPICLK P02， RF905-SCK // SPIMISO P03，RF905-MISO // SPIMOSI P04，RF905-MOSI // P20，RF905-CSN // P37，RF905-TX_EN // P33，RF905-TRX_CE // P34，RF905-PWR_UP // P23，RF905-CD // P24，RF905-AM // P20，RF905-DR // P13，L // P12，R #include "c8051f340.h" #define SYSCLK 12000000 #define SPI_CLOCK 100000 #define WC 0x00 // 写配置寄存器 #define RC 0x10 // 读配置寄存器 #define WTP 0x20 // 向TX-Payload寄存器写入发送有效数据 #define RTP 0x21 // 从TX-Payload寄存器读取发送有效数据 #define WTA 0x22 // 向TX-Address寄存器写入发送地址 #define RTA 0x23 // 从TX-Address寄存器读取发送地址 #define RRP 0x24 // 从RX-Payload寄存器读取接收到的有效数据 void Port_Init(void); // 端口初始化 void Timer0_Init (void); // Timer0 初始化 void delay_50us(unsigned long N50us); void OSCIN_init(void); void Volt_measure(void); void SPI0_Init(void); void SpiWrite(unsigned char byte); unsigned char SpiRead(void); void Config905(void); void TxPacket(void); void RxPacket(void); void SetTxMode(void); void SetRxMode(void); typedef struct RFConfig { unsigned char n; unsigned char buf[10]; }RFConfig; code RFConfig RxTxConf = { 10, 0x4c, 0x0c, 0x44, 0x20, 0x20, 0xcc, 0xcc, 0xcc,0xcc, 0x58 }; xdata unsigned long Volt1_value=0; xdata unsigned long Volt2_value=0; xdata unsigned long Time_flag=0; xdata unsigned char TxBuf[32]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10, 0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,0x20}; xdata unsigned char RxBuf[32]; unsigned char bdata DATA_BUF; sbit flag =DATA_BUF^7; sbit flag1 =DATA_BUF^0; bit SPI_BUSY; //sbit MOSI=P0^2; //sbit MISO=P0^1; //sbit SCK=P0^0; sbit CSN=P2^0; sbit TRX_CE=P2^1; sbit TX_EN=P2^2; sbit PWR_UP=P2^3; sbit DR=P1^0; sbit AM=P1^1; sbit CD=P1^2; sbit key_TX=P1^3; main() { unsigned long coeff1=0; unsigned char coeff2=0; unsigned char k; PCA0MD &= ~0x40; // 请看门狗 OSCIN_init(); Port_Init(); Timer0_Init(); SPI0_Init(); // XBR1 = 0x40; EA=1; // ESPI0=1; //================NRF905初始化 CSN=1; // Spi禁止 // SCK=0; // Spi clock line初始化高 DR=1; // Init DR for input AM=1; // Init AM for input PWR_UP=1; // nRF905 power on TRX_CE=0; // Set nRF905 in standby mode TX_EN=1; // set radio in Tx mode //================ Config905(); CSN=0; SpiWrite(RC); // 准备读取接收到的数据 for (k=0;k<10;k++) { RxBuf[k]=SpiRead(); // 通过SPI接口从905芯片读取数据 } CSN=1; SetTxMode(); TxPacket(); SetRxMode(); RxPacket(); // TxBuf[0]=0; while(1) { Volt_measure(); coeff1=Volt1_value/50; if(coeff1>20) coeff1=20; coeff2=coeff1; if(coeff2!=TxBuf[0]) { TxBuf[0]=coeff1; TxPacket(); } } } //-------------------------------------------------------- // //-------------------------------------------------------- void Port_Init(void) { XBR0 = 0x02; // Enable SPI XBR1 = 0x40; // Enable crossbar // P0MDOUT |= 0x10; // Set TX pin to push-pull P2MDOUT |= 0x00; // enable LED as a push-pull output P1MDIN &= ~0x30; // set P1.5 as an analog input } //-------------------------------------------------------- // //-------------------------------------------------------- void OSCIN_init(void) { OSCICN=0x83; OSCICL=0x00; } //-------------------------------------------------------- // //-------------------------------------------------------- void Timer0_Init(void) { TH0 = 0xff; // Init Timer0 High register TL0 = 0xce; // Init Timer0 Low register TMOD = 0x01; // Timer0 in 16-bit mode CKCON = 0x00; // Timer0 uses a 1:48 prescaler ET0 = 1; // Timer0 interrupt enabled TCON = 0x10; // Timer0 ON } //-------------------------------------------------------- // //-------------------------------------------------------- void ADC0_Init (void) { ADC0CN = 0x00; // ADC0 disabled, 查询方式, // conversion triggered on TMR2 overflow REF0CN = 0x03; // Enable on-chip VREF and buffer AMX0P = 0x06; // ADC0 positive input = P1.1 AMX0N = 0x1F; // ADC0 negative input = GND // i.e., single ended mode ADC0CF = ((SYSCLK/3000000)-1)<<3; // set SAR clock to 3MHz ADC0CF |= 0x00; // right-justify results AD0EN = 1; // enable ADC0 } //----------------------------------------------------------------------------- // SPI0_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : None // // Configures SPI0 to use 4-wire Single Master mode. The SPI timing is // configured for Mode 0,0 (data centered on first edge of clock phase and // SCK line low in idle state). // //----------------------------------------------------------------------------- void SPI0_Init() { SPI0CFG = 0x60; // Enable the SPI as a Master // CKPHA = '0', CKPOL = '0' SPI0CN = 0x01; // 3-wire Single Master, SPI enabled // SPI clock frequency equation from the datasheet SPI0CKR = (SYSCLK/(2*SPI_CLOCK))-1; // ESPI0 = 1; // Enable SPI interrupts } //-------------------------------------------------------- // //-------------------------------------------------------- void Timer0_ISR (void) interrupt 1 { TH0 = 0xff; // Reinit Timer0 High register TL0 = 0xce; // Reinit Timer0 Low register Time_flag++; } //-------------------------------------------------------- void delay_50us(unsigned long N50us) { unsigned long i=0; Timer0_Init(); Time_flag=0; while(Time_flag<N50us); ET0=0; Time_flag=0; } //----------------------------------------------------------------------------- //测试电压 //----------------------------------------------------------------------------- void Volt_measure(void) { unsigned char i=0; unsigned char j=0; unsigned long a[7]=0; unsigned long Temp=0; ADC0_Init (); Volt1_value=0; AD0BUSY=1; while(AD0INT==0); AD0INT=0; Volt1_value=ADC0H; Volt1_value<<=8; Volt1_value|=ADC0L; /* for(j=0;j<7;j++) { Volt1_value=0; AD0BUSY=1; // for(i=0;i<250;i++); while(AD0INT==0); AD0INT=0; Volt1_value=ADC0H; Volt1_value<<=8; Volt1_value|=ADC0L; a[j]=Volt1_value; } for(i=0;i<6;i++) for(j=i+1;j<7;j++) { if(a[i]>a[j]) { Temp=a[i]; a[i]=a[j]; a[j]=Temp; } else ; } Volt1_value=0; for(j=1;j<6;j++) { Volt1_value+=a[j]; } Volt1_value/=5;*/ } //--------------------------------------------------------------- //<SPI写操作 代码> //--------------------------------------------------------------- void SpiWrite(unsigned char byte) { unsigned char i; DATA_BUF=byte; // Put function's parameter into a bdata variable /* for (i=0;i<8;i++) // Setup byte circulation bits { if (flag) // Put DATA_BUF.7 on data line MOSI=1; else MOSI=0; SCK=1; // Set clock line high DATA_BUF=DATA_BUF<<1; // Shift DATA_BUF SCK=0; // Set clock line low } */ //CSN=0; //SPI_BUSY=1; SPIF=0; SPI0DAT=byte; while (!SPIF); //CSN=1; } //-----------------