
2010-01-22 21:39
本程序 整理于 无线收发模块 包括api.h和lv51.c 已通过开发板调试
api.h
// BYTE type definition
#ifndef _BYTE_DEF_
#define _BYTE_DEF_
typedef unsigned char BYTE;
#endif /* _BYTE_DEF_ */
//****************************************************************//
// SPI(nRF24L01) commands
#define READ_REG 0x00 // Define read command to register
#define WRITE_REG 0x20 // Define write command to register
#define RD_RX_PLOAD 0x61 // Define RX payload register address
#define WR_TX_PLOAD 0xA0 // Define TX payload register address
#define FLUSH_TX 0xE1 // 清除 TX FIFO寄存器 应用于发射模式下
#define FLUSH_RX 0xE2 // 清除 RX FIFO寄存器 应用于接收模式下
#define REUSE_TX_PL 0xE3 //重新使用上一包有效数据 当 CE 为高过程中 数据包被不断的重,在发射数据包过程中必须禁止数据包重利用功
新发射
#define NOP 0xFF // Define No Operation, might be used to read status register
//***************************************************//
// SPI(nRF24L01) registers(addresses)
#define CONFIG 0x00 // 'Config' register address
#define EN_AA 0x01 // 'Enable Auto Acknowledgment' register address
#define EN_RXADDR 0x02 // 'Enabled RX addresses' register address
#define SETUP_AW 0x03 // 'Setup address width' register address
#define SETUP_RETR 0x04 // 'Setup Auto. Retrans' register address
#define RF_CH 0x05 // 'RF channel' register address
#define RF_SETUP 0x06 // 'RF setup' register address
#define STATUS 0x07 // 'Status' register address
#define OBSERVE_TX 0x08 // 'Observe TX' register address
#define CD 0x09 // 'Carrier Detect' register address
#define RX_ADDR_P0 0x0A // 'RX address pipe0' register address
#define RX_ADDR_P1 0x0B // 'RX address pipe1' register address
#define RX_ADDR_P2 0x0C // 'RX address pipe2' register address
#define RX_ADDR_P3 0x0D // 'RX address pipe3' register address
#define RX_ADDR_P4 0x0E // 'RX address pipe4' register address
#define RX_ADDR_P5 0x0F // 'RX address pipe5' register address
#define TX_ADDR 0x10 // 'TX address' register address
#define RX_PW_P0 0x11 // 'RX payload width, pipe0' register address
#define RX_PW_P1 0x12 // 'RX payload width, pipe1' register address
#define RX_PW_P2 0x13 // 'RX payload width, pipe2' register address
#define RX_PW_P3 0x14 // 'RX payload width, pipe3' register address
#define RX_PW_P4 0x15 // 'RX payload width, pipe4' register address
#define RX_PW_P5 0x16 // 'RX payload width, pipe5' register address
#define FIFO_STATUS 0x17 // 'FIFO Status Register' register address
lv51.c
#include #include #include "api.h" #define uchar unsigned char #define TX_ADR_WIDTH 5 // 5 bytes TX(RX) address width #define TX_PLOAD_WIDTH 20 // 20 bytes TX payload uchar const TX_ADDRESS[TX_ADR_WIDTH] = {0x34,0x43,0x10,0x10,0x01}; // Define a static TX address uchar rx_buf[TX_PLOAD_WIDTH]; uchar tx_buf[TX_PLOAD_WIDTH]; uchar flag; /**************************************************/ sbit CE = P1^0; sbit CSN= P1^1; sbit SCK= P1^2; sbit MOSI= P1^3; sbit MISO= P1^4; sbit IRQ = P1^5; /**************************************************/ uchar 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_io(void) { CE=0; // chip enable CSN=1; // Spi disable SCK=0; // Spi clock line init high } void delay_ms(unsigned int x) { unsigned int i,j; i=0; for(i=0;i j=108; ; while(j--); } } /************************************************** Function: SPI_RW(); Description: Writes one byte to nRF24L01, and return the byte read from nRF24L01 during write, according to SPI protocol /**************************************************/ 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.. byte |= MISO; // capture current MISO bit SCK = 0; // ..then set SCK low again } return(byte); // 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 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 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 RX_Mode(void) { 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, 0x07); // 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 TX_Mode(void) { 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, 0x01); // Enable Auto.Ack:Pipe0 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0 SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans... SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:TX. MAX_RT & TX_DS enabled.. CE=1;}
