NRF24L01收发程序

1、NRF24L01收发程序包含 nrf24L01 头文件如下 :#include <iom16v.h>#include <macros.h>#include "12864.h"/-/spi标志#define DDR_SPI DDRB#define DD_MOSI 5#define DD_MISO 6#define DD_SCK 7#define DD_SS 4#define CE PB3#define IRQ PB2/-NRF24L01- /-接口定义 -/#define NRF24L01_MISO PB6 /输入 0#define Hign_24L0

2、1_MISO PORTB|=(1 << PB6) #define Low_24L01_MISO PORTB &= (1 << PB6) #define Read_24L01_MISO PINB & (1 << PB6)/#define NRF24L01_MOSI PB5 /输出 1#define Hign_24L01_MOSI PORTB |= (1 << PB5) #define Low_24L01_MOSI PORTB &= (1 << PB5) #define Read_24L01_MOSI PINB &

3、amp; (1 << PB5)/#define NRF24L01_SCK PB7 /输出 1#define Hign_24L01_SCK PORTB |= (1 << PB7) #define Low_24L01_SCK PORTB &= (1 << PB7) #define Read_24L01_SCK PINB & (1 << PB7);/#define NRF24L01_CSN PB4 /输出 1#define Low_24L01_CSN PORTB &= (1 << PB4) #define Hign_

4、24L01_CSN PORTB |= (1 << PB4)/#define NRF24L01_CE PB3 /输出 1#define Hign_24L01_CE PORTB |= (1 << PB3) #define Low_24L01_CE PORTB &= (1 << PB3) #define Read_24L01_CE PINB & (1 << PB3)/*NRF24L01*#define TX_ADR_WIDTH 5 /发送地址长度，最大长度为5 5*8=40 bit#define RX_ADR_WIDTH 5 /接收地址

5、长度#define TX_PLOAD_WIDTH 32 / 发送字节长度，#define RX_PLOAD_WIDTH 32 / 接收字节长度uchar TX_ADDRESSTX_ADR_WIDTH=0x34,0x43,0x10,0x10,0x01; / 发送地址uchar RX_ADDRESSRX_ADR_WIDTH=0x34,0x43,0x10,0x10,0x01; / 接收地址 /*NRF24L01寄存器指令*#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

6、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*#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_

7、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

8、#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_P10x12 /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_P40x15 /接收频

9、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/*/*/* void spi_init()初始化 SPI/* void spi_init()Hign_24L01_CSN;DDR_SPI = (1<<DD_MOSI)|(1<<DD_SCK)|(1<<DD_SS)|(1 << CE);/ 设置MOSI,SCK,SS.CE为 OUTPUT,其它为 INPUTDDR_SPI&=(1<<DD_MISO)|(1&

10、lt;<IRQ);SPCR=(1<<SPE)|(1<<MSTR)|(1<<SPR0);/使能 SPI 接口 , 主机模式 ,MSB低位在前 , 模式 0,16分频 ,SPI 时钟 1MHZSPSR=0;/* /* ucharSPI_RW(uchar date)读写 SPI/* uchar SPI_RW(uchar date)SPDR=date;while(!(SPSR&(1<<SPIF);return SPDR;/* /*ucharSPI_Read(uchar reg)读 24L01 寄存器/* ucharSPI_Read(ucha

11、r reg)uchar reg_val;Low_24L01_CSN;SPI_RW(reg);reg_val = SPI_RW(0);Hign_24L01_CSN;return(reg_val);/* /* ucharSPI_RW_Reg(uchar reg, uchar value) /写 24L01 寄存器/*uchar SPI_RW_Reg(uchar reg, uchar value)uchar status;Low_24L01_CSN;status = SPI_RW(reg);SPI_RW(value);Hign_24L01_CSN;return(status);/* /* uchar

12、 SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites)/ 读 24L01 寄存器 BUFF /* ucharSPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites) uint status1,uchar_ctr;Low_24L01_CSN;status1 = SPI_RW(reg);for(uchar_ctr=0;uchar_ctr<bites;uchar_ctr+)pBufuchar_ctr = SPI_RW(0);Hign_24L01_CSN;return(status1);/* /* uchar

13、 SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites)/写 24L01 寄存器 BUFF/* uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites) uchar status1,uchar_ctr;Low_24L01_CSN; /SPI 使能status1 = SPI_RW(reg);for(uchar_ctr=0; uchar_ctr<bites; uchar_ctr+) /SPI_RW(*pBuf+);Hign_24L01_CSN; / 关闭 SPIreturn(status1)

14、; /* /* void SetRX_Mode(void)/ 接收模式设置/* void SetRX_Mode(void)Low_24L01_CE;SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); /写接收地址SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); /0通道自动应答SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01);数/据通道 0SPI_RW_Reg(WRITE_REG + RF_CH,0); /射频通道SPI_RW_Reg(WRITE_REG + RX

15、_PW_P0, RX_PLOAD_WIDTH);/写通道 0 接受数据长度SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); /0db 1MSPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); /接收模式Hign_24L01_CE; / 开始接收delayus(200);/注意不能太小/* /* ucharnRF24L01_RxPacket(uchar* rx_buf) /接收数据包/* uchar nRF24L01_RxPacket(uchar* rx_buf)uchar sta,flag=0;sta=SPI_Read(STATUS); /读

16、取状态寄存其来判断数据接收状况if(sta&0x40) /判断是否接收到数据RX_DR=1?Low_24L01_CE; / StandBy I模式SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);/ read receive payloadfrom RX_FIFO bufferflag =1; /读取数据完成标志SPI_RW_Reg(WRITE_REG+STATUS,sta); 接/收到数据后 RX_DR,TX_DS,MAX_PT都置高为 1，通过写 1 来清楚中断标志return (flag);/*/* void nRF24L01_TxP

17、acket(uchar * tx_buf) /* voidnRF24L01_TxPacket( uchar * tx_buf) uchar sta=0;uchar flag=0;发送数据包Low_24L01_CE; /StandBy I模式SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH);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_WI

18、DTH); /装载数据SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); /SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); /SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1f); /500+86usSPI_RW_Reg(WRITE_REG + RF_CH, 0); /SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); /SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); / IRQ收发完成中断响应， 16 位CRC，主发送delayms(2);Hign_24L01_CE; / 置高 CE，激发数据发送delayus(10);Low