STC15L204EA_NRF24L01测试程序加资料

#include "typedef.h" #include <intrins.h> #include <string.h> #include "NRF_24L01.h" #include "UART.H" #include "delay.h" #define uchar unsigned char uchar const TX_ADDRESS[TX_ADR_WIDTH] = {0x34,0x43,0x10,0x10,0x01}; // Define a static TX address idata uchar rx_buf[TX_PLOAD_WIDTH]; idata uchar tx_buf[TX_PLOAD_WIDTH]; uchar flag; /**************************************************/ //sbit LED1= P3^7; /**************************************************/ unsigned char bdata sta; sbit RX_DR =sta^6; sbit TX_DS =sta^5; sbit MAX_RT =sta^4; /**************************************************/ /************************************************** Function: init_io(); Description: flash led one time,chip enable(ready to TX or RX Mode), Spi disable,Spi clock line init high /**************************************************/ #define KEY 0xaa void init_nrf24l01_io(void) { CE=0; // chip enable CSN=1; // Spi disable SCK=0; // Spi clock line init high } /************************************************** Function: SPI_RW(); Description: Writes one byte to nRF24L01, and return the byte read from nRF24L01 during write, according to SPI protocol /**************************************************/ bdata unsigned char st=0; sbit st_1=st^0; sbit st_2=st^1; sbit st_3=st^2; sbit st_4=st^3; sbit st_5=st^4; sbit st_6=st^5; sbit st_7=st^6; sbit st_8=st^7; bdata unsigned char st1=0; sbit st_11=st1^0; sbit st_12=st1^1; sbit st_13=st1^2; sbit st_14=st1^3; sbit st_15=st1^4; sbit st_16=st1^5; sbit st_17=st1^6; sbit st_18=st1^7; /* uchar SPI_RW(uchar byte) { uchar bit_ctr; for(bit_ctr=0;bit_ctr<8;bit_ctr++) // output 8-bit { MOSI = (byte & 0x80); // output 'byte', MSB to MOSI byte = (byte << 1); // shift next bit into MSB.. SCK = 1; // Set SCK high.. MISO=1; byte |= MISO; // capture current MISO bit SCK = 0; // ..then set SCK low again } return(byte); // return read byte } */ uchar SPI_RW(uchar byte) { //uchar bit_ctr; st=byte; MOSI=st_8; SCK = 1; st_18=MISO; SCK = 0; MOSI=st_7; SCK = 1; st_17=MISO; SCK = 0; MOSI=st_6; SCK = 1; st_16=MISO; SCK = 0; MOSI=st_5; SCK = 1; st_15=MISO; SCK = 0; MOSI=st_4; SCK = 1; st_14=MISO; SCK = 0; MOSI=st_3; SCK = 1; st_13=MISO; SCK = 0; MOSI=st_2; SCK = 1; st_12=MISO; SCK = 0; MOSI=st_1; SCK = 1; st_11=MISO; SCK = 0; return(st1); // return read byte } /**************************************************/ /************************************************** Function: SPI_RW_Reg(); Description: Writes value 'value' to register 'reg' /**************************************************/ uchar SPI_RW_Reg(BYTE reg, BYTE value) { uchar status; CSN = 0; // CSN low, init SPI transaction status = SPI_RW(reg); // select register SPI_RW(value); // ..and write value to it.. CSN = 1; // CSN high again return(status); // return nRF24L01 status byte } /**************************************************/ /************************************************** Function: SPI_Read(); Description: Read one byte from nRF24L01 register, 'reg' /**************************************************/ BYTE SPI_Read(BYTE reg) { BYTE reg_val; CSN = 0; // CSN low, initialize SPI communication... SPI_RW(reg); // Select register to read from.. reg_val = SPI_RW(0); // ..then read registervalue CSN = 1; // CSN high, terminate SPI communication return(reg_val); // return register value } /**************************************************/ /************************************************** Function: SPI_Read_Buf(); Description: Reads 'bytes' #of bytes from register 'reg' Typically used to read RX payload, Rx/Tx address /**************************************************/ uchar SPI_Read_Buf(BYTE reg, BYTE *pBuf, BYTE bytes) { uchar status,byte_ctr; CSN = 0; // Set CSN low, init SPI tranaction status = SPI_RW(reg); // Select register to write to and read status byte for(byte_ctr=0;byte_ctr<bytes;byte_ctr++) pBuf[byte_ctr] = SPI_RW(0); // Perform SPI_RW to read byte from nRF24L01 CSN = 1; // Set CSN high again return(status); // return nRF24L01 status byte } /**************************************************/ /************************************************** Function: SPI_Write_Buf(); Description: Writes contents of buffer '*pBuf' to nRF24L01 Typically used to write TX payload, Rx/Tx address /**************************************************/ uchar SPI_Write_Buf(BYTE reg, BYTE *pBuf, BYTE bytes) { uchar status,byte_ctr; CSN = 0; // Set CSN low, init SPI tranaction status = SPI_RW(reg); // Select register to write to and read status byte for(byte_ctr=0; byte_ctr<bytes; byte_ctr++) // then write all byte in buffer(*pBuf) SPI_RW(*pBuf++); CSN = 1; // Set CSN high again return(status); // return nRF24L01 status byte } /**************************************************/ /************************************************** Function: RX_Mode(); Description: This function initializes one nRF24L01 device to RX Mode, set RX address, writes RX payload width, select RF channel, datarate & LNA HCURR. After init, CE is toggled high, which means that this device is now ready to receive a datapacket. /**************************************************/ void power_off() { CE=0; SPI_RW_Reg(WRITE_REG + CONFIG, 0x0D); CE=1; _delay_us(20); } void ifnnrf_rx_mode(void) { power_off(); CE=0; SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // Use the same address on the RX device as the TX device SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0 SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40 SPI_RW_Reg(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH); // Select same RX payload width as TX Payload width SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x26); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:RX. RX_DR enabled.. CE = 1; // Set CE pin high to enable RX device // This device is now ready to receive one packet of 16 bytes payload from a TX device sending to address // '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and datarate = 2Mbps. } /**************************************************/ /************************************************** Function: TX_Mode(); Description: This function initializes one nRF24L01 device to TX mode, set TX address, set RX address for auto.ack, fill TX payload, select RF channel, datarate & TX pwr. PWR_UP is set, CRC(2 bytes) is enabled, & PRIM:TX. ToDo: One high pulse(>10us) on CE will now send this packet and expext an acknowledgment from the RX device. /**************************************************/ void ifnnrf_tx_mode(void) { power_off(); CE=0; SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // Writes TX_Address to nRF24L01 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // RX_Addr0 same as TX_Adr for Auto.Ack SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // Writes data to TX payload SPI_RW_Reg(WRITE_REG + EN_AA,