51 MCU with nrf905 header file

Introduction: This article provides a code for a 51 microcontroller using the nrf905 header file.

#define nRFMainDev //Main device

//#define SysWaitTime 20//0.5*20=10S, stop flashing if no key is pressed

#define SysWaitTime 6 //0.5*20=3S, no key press, stop flashing

#define SysPushKeyTime 150 //Long press key 150 * 20mS = 3.0S

#define T2_5mS -921.6*5//5ms 12MHz

/*------------------------------------------------

AT89S5X

--------------------------------------------------*/

sfr   AUXR    = 0x8e;

sfr   WDTRST  = 0xa6;

sfr16 TIMEER2 = 0xcc;

sfr16 RCAP    = 0xca;

//Global variable definition

typedef struct Systemstruct{//system data structure

// unsigned char SystemFlage; //system flag

  unsigned char TimeCount;

  unsigned int RamTest;

  unsigned char TestTime;

  unsigned char WaitTime;

  unsigned char KeyCount[4];

  unsigned char nRFTxCount;

  unsigned char nRFRxCount;

  unsigned char nRFTxBuff[32];

  unsigned char nRFRxBuff[32];

}SystemData;

//Global variable definition

typedef struct Siostruct{//system data structure

  unsigned char SioTxBuff[32];

  unsigned char SioRxBuff[32];

  unsigned char SioTXCount;

  unsigned char SioRXCount;

}SioData;

/*-----------------------------------------------

        nrf905 pin definition

------------------------------------------------*/

sbit TX_EN = P2^6;//0

sbit TRX_CE = P2^5;//0

sbit PWR_UP = P2^4;//1

sbit MISO = P2^3;//1

sbit MOSI = P2^2;//1

sbit SCK = P2^1;//0

sbit CSN = P2^0;//1

sbit AM  = P3^2;//1

sbit DR = P3^3;//1

sbit CD = P3^5;//1

sbit KEY0 = P0^0;

sbit KEY1 = P0^1;

sbit KEY2 = P0^2;

sbit KEY3 = P0^3;

sbit LED0 = P0^4;

sbit LED1 = P0^5;

sbit LED2 = P0^6;

sbit LED3 = P0^7;

#define Status_AM 0x80

#define Status_DR 0x20

/*-----------------------------------------------

        nrf905 command control word

------------------------------------------------*/

#define WC  0x00   // Write configuration register command

#define RC  0x10    // Read  configuration register command

#define WTP  0x20    // Write TX Payload  command

#define RTP  0x21   // Read  TX Payload  command

#define WTA  0x22   // Write TX Address  command

#define RTA  0x23   // Read  TX Address  command

#define RRP  0x24   // Read  RX Payload  command

#define CC      0x80            // fast config

/*-------------------------------------------------------------------------------------------

        nrf905 configuration register (10Byte)

Operating frequency f=(422.4+CH_NO/10)*(1+HFREQ_PLL)MHz

-------------------------------------------------------------------------------------------*/

#ifdef  nRFMainDev

#define RX_ADDRESS 0x00000000 //Receive valid address

//#define TX_ADDRESS 0x12345678 //Send valid address

//#define TX_ADDRESS 0x02345678 //Send valid address

#else

//#define RX_ADDRESS 0x12345678 //Receive valid address

#define RX_ADDRESS 0x12345678 //Receive valid address

//#define TX_ADDRESS 0x00000000 //Send valid address

#endif

#define CH_NO_FREQ_422_4MHz 0x000 //Working frequency 422.4MHz (lowest frequency in 433MHz band)

#define CH_NO_FREQ_422_5MHz 0x001 //Working frequency 422.5MHz

#define CH_NO_FREQ_425_0MHz 0x01a //Working frequency 425.0MHz

#define CH_NO_FREQ_427_5MHz 0x033 //Working frequency 427.5MHz

#define CH_NO_FREQ_430_0MHz 0x04c //Working frequency 430.0MHz

#define CH_NO_FREQ_433_0MHz 0x06a //Working frequency 433.0MHz (433MHz band reference frequency)

#define CH_NO_FREQ_433_1MHz 0x06b //Working frequency 433.1MHz

#define CH_NO_FREQ_433_2MHz 0x06c //Working frequency 433.2MHz

#define CH_NO_FREQ_434_7MHz 0x07b //Working frequency 434.7MHz

#define CH_NO_FREQ_473_5MHz 0x1ff //Working frequency 473.5MHz (highest frequency in 433MHz band)

#define CH_NO_FREQ_844_8MHz 0x000 //Working frequency 844.8MHz (the lowest frequency in the 868MHz band)

#define CH_NO_FREQ_862_0MHz 0x056 //Working frequency 862.0MHz

#define CH_NO_FREQ_868_0MHz 0x074 //Working frequency 868.0MHz (868MHz band reference frequency)

#define CH_NO_FREQ_868_2MHz 0x075 //Working frequency 868.2MHz

#define CH_NO_FREQ_868_4MHz 0x076 //Working frequency 868.4MHz

#define CH_NO_FREQ_869_8MHz 0x07d //Working frequency 869.8MHz

#define CH_NO_FREQ_895_8MHz 0x0ff //Working frequency 895.8MHz

#define CH_NO_FREQ_896_0MHz 0x100 //Working frequency 896.0MHz

#define CH_NO_FREQ_900_0MHz 0x114 //Working frequency 900.0MHz

#define CH_NO_FREQ_902_2MHz 0x11f //Working frequency 902.2MHz

#define CH_NO_FREQ_902_4MHz 0x120 //Working frequency 902.4MHz

#define CH_NO_FREQ_915_0MHz 0x15f //Working frequency 915.0MHz (915MHz band reference frequency)

#define CH_NO_FREQ_927_8MHz 0x19f //Working frequency 927.8MHz

#define CH_NO_FREQ_947_0MHz 0x1ff //Working frequency 947.0MHz (highest frequency in 915MHz band)

#define CH_NO_FREQ CH_NO_FREQ_430_0MHz //Operating frequency 433.0MHz

#define CH_NO_BYTE CH_NO_FREQ & 0xff //Low 8 bits of operating frequency Byte0 01101100

#define AUTO_RETRAN 0x20 //Resend data packet Byte1.5 0

#define RX_RED_PWR 0x10 //Receive low power mode Byte1.4 0

#define PA_PWR__10dBm 0x00 //Output power -10dBm Byte1.3~2 00

#define PA_PWR_2dBm 0x04 //Output power +2dBm Byte1.3~2

#define PA_PWR_6dBm 0x08 //Output power +6dBm Byte1.3~2

#define PA_PWR_10dBm 0x0c //Output power +10dBm Byte1.3~2  

#define HFREQ_PLL_433MHz 0x00 //Work in 433MHz frequency band Byte1.1 0

#define HFREQ_PLL_868MHz 0x02 //Work in 868MHz frequency band Byte1.1

#define HFREQ_PLL_915MHz 0x02 //Work in 915MHz frequency band Byte1.1

#define CH_NO_BIT8 CH_NO_FREQ >> 8 //9th bit of operating frequency Byte1.0 0

#define TX_AFW_1BYTE 1 * 16 //Send address width 1 byte Byte2.7~4

#define TX_AFW_2BYTE 2 * 16 //Send address width 2 bytes Byte2.7~4

#define TX_AFW_3BYTE 3 * 16 //Send address width 3 bytes Byte2.7~4

#define TX_AFW_4BYTE 4 * 16 //Transmit address width 4 bytes Byte2.7~4 100

#define RX_AFW_1BYTE 1 //Receive address width 1 byte Byte2.3~0

#define RX_AFW_2BYTE 2 //Receive address width 2 bytes Byte2.3~0

#define RX_AFW_3BYTE 3 //Receive address width 3 bytes Byte2.3~0

#define RX_AFW_4BYTE 4 //Receive address width 4 bytes Byte2.3~0 100

#define RX_PW_1BYTE 1 //Receive data width 1 byte Byte3.5~0

#define RX_PW_32BYTE 32 //Receive data width 32 bytes Byte3.5~0 00100000

#define TX_PW_1BYTE 1 //Send data width 1 byte Byte4.5~0

#define TX_PW_32BYTE 32 //Send data width 32 bytes Byte4.5~0 00100000

#define RX_ADDRESS_0 RX_ADDRESS >> 24 //Receive the first byte of the effective address Byte5 11100111

#define RX_ADDRESS_1 (RX_ADDRESS >> 16) & 0xff //Receive the second byte of the effective address Byte6 11100111

#define RX_ADDRESS_2 (RX_ADDRESS >> 8) & 0xff //Receive the third byte of the effective address Byte7 11100111

#define RX_ADDRESS_3 RX_ADDRESS & 0xff //Receive the effective address 4th byte Byte8 11100111

#define CRC_MODE_16BIT 0x80 //CRC16 mode Byte9.7 1

#define CRC_MODE_8BIT 0x00 //CRC8 mode Byte 9.7    

#define CRC_EN 0x40 //CRC enable Byte9.6 1

#define CRC16_EN 0xc0 //CRC16 mode enable Byte9.7~6 11

#define CRC8_EN 0x40 //CRC8 mode enable Byte 9.7~6

#define XOF_20MHz 0x20 //Crystal oscillator frequency 20MHz Byte9.5~3

#define XOF_16MHz 0x18 //Crystal oscillator frequency 16MHz Byte9.5~3 100

#define XOF_12MHz 0x10 //Crystal oscillator frequency 12MHz Byte9.5~3

#define XOF_8MHz 0x08 //Crystal oscillator frequency 8MHz Byte9.5~3

#define XOF_4MHz 0x00 //Crystal oscillator frequency 4MHz Byte9.5~3

#define UP_CLK_EN 0x40 //Output clock enable Byte9.2 1

#define UP_CLK_FREQ_500kHz 0x03 //Output clock frequency 500kHz Byte9.1~0 11

#define UP_CLK_FREQ_1MHz 0x02 //Output clock frequency 1MHz Byte9.1~0

#define UP_CLK_FREQ_2MHz 0x01 //Output clock frequency 2MHz Byte9.1~0

#define UP_CLK_FREQ_4MHz 0x00 //Output clock frequency 4MHz Byte9.1~0

#define UP_CLK_EN_500kHz 0x43 //Output clock frequency 500kHz Byte9.2~0 111

#define UP_CLK_EN_1MHz 0x42 //Output clock frequency 1MHz Byte9.2~0

#define UP_CLK_EN_2MHz 0x41 //Output clock frequency 2MHz Byte9.2~0

#define UP_CLK_EN_4MHz 0x40 //Output clock frequency 4MHz Byte9.2~0

//#define TX_ADDRESS_0 TX_ADDRESS >> 24 //Send and receive valid address 1st byte

//#define TX_ADDRESS_1 (TX_ADDRESS >> 16) & 0xff //Send the second byte of the effective address

//#define TX_ADDRESS_2 (TX_ADDRESS >> 8) & 0xff //Send the third byte of the effective address

//#define TX_ADDRESS_3 TX_ADDRESS & 0xff //Send the 4th byte of the effective address

/*-----------------------------------------------

        nrf905 library function definition

------------------------------------------------*/

extern unsigned char SpiReadWrite(unsigned char);

extern void WriteTXAddr(unsigned long);

extern void WriteTXBuffer(const unsigned char []);

extern unsigned char ReadStatus(void);

extern void nRF905PowerUP(void);