STC12单片机硬件SPI的nrf20l01从机发送程序.doc

#include #include typedef unsigned char uchar;#define uint unsigned int/*IO端口定义*sfr SPCTL = 0xCE; /SPI Control Register SSIG SPEN DORD MSTR CPOL CPHA SPR1 SPR0 0000,0100sfr SPSTAT = 0xCD; /SPI Status Register SPIF WCOL - - - - - - 00xx,xxxxsfr SPDAT = 0xCF;sbit CE =P10;sbit CSN =P11;sbit IRQ =P12;sbit led=P13;/*uchar bdata sta; /状态标志sbit RX_DR =sta6;sbit TX_DS =sta5;sbit MAX_RT =sta4;/*NRF24L01*#define TX_ADR_WIDTH 5 / 5 uints TX address width#define RX_ADR_WIDTH 5 / 5 uints RX address width#define TX_PLOAD_WIDTH 32 / 32 uints TX payload#define RX_PLOAD_WIDTH 32 / 32 uints TX payloaduchar const TX_ADDRESSTX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01; /本地地址uchar const RX_ADDRESSRX_ADR_WIDTH= 0x34,0x43,0x10,0x10,0x01; /接收地址uchar code Tx_BufTX_PLOAD_WIDTH=0xff,0xee,0x11,0x22,0x33,0xaa,0xbb,0x11,0x22,0x33,0xaa,0xbb,0x11,0x22,0x33,0xaa,0xbb,0x11,0x22,0x33,0xaa,0xbb,0x11,0x22,0x33,0xaa,0xbb,0x11,0x22,0x33,0xee,0xff;/发送数据uchar Rx_BufRX_PLOAD_WIDTH;/接收数据/*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_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#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_P1 0x12 / 接收频道1接收数据长度#define RX_PW_P2 0x13 / 接收频道2接收数据长度#define RX_PW_P3 0x14 / 接收频道3接收数据长度#define RX_PW_P4 0x15 / 接收频道4接收数据长度#define RX_PW_P5 0x16 / 接收频道5接收数据长度#define FIFO_STATUS 0x17 / FIFO栈入栈出状态寄存器设置/*延时函数*/长延时void Delay(unsigned int s) unsigned int i,j;for(i=0;i1000;i+)for(j=0;js;j+);/短延时void delay_ms(unsigned int x) unsigned int i,j; i=0; for(i=0;ix;i+) j=108; while(j-); /*初始化5A spi*/void Init_SPI() SPDAT=0; /初始化数据寄存器 SPSTAT=0XC0; /清除状态寄存器SPCTL=0XD2;/设置为主机模式 主频不能超过2M/忽略SS 使能spi MSB SCLK空闲为0 第一个时钟边沿开始采集 spi通信的频率为CUP_CLK/16/SPDAT 读写一个字节/TxData:要写入的字节 /返回值:读取到的字节uchar SPI_ReadWriteByte(uchar TxData) SPDAT=TxData; /发送一个byte while(SPSTAT&0x80)=0); SPSTAT=0XC0;/清除状态寄存器 return SPDAT; /返回收到的数据 /读取SPI寄存器值/reg:要读的寄存器uchar SPI_Read_Reg(uchar reg)uchar reg_val; CSN = 0; /使能SPI传输 SPI_ReadWriteByte(reg); /发送寄存器号 reg_val=SPI_ReadWriteByte(0xFF);/读取寄存器内容 CSN = 1; /禁止SPI传输 return(reg_val); /返回状态值/ 向寄存器REG写一个字节，同时返回状态字节 reg寄存器地址 value写入的数据uchar SPI_RW_Reg (uchar reg,uchar value) uchar status; CSN=0; status=SPI_ReadWriteByte(reg);/发送寄存器号 SPI_ReadWriteByte(value); /写入寄存器的值 CSN=1; return(status);/写一个数据包uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bytes) uchar status,byte_ctr; CSN = 0; status=SPI_ReadWriteByte(reg); for(byte_ctr=0; byte_ctrbytes; byte_ctr+) SPI_ReadWriteByte(*pBuf+); CSN = 1; return(status); /读一个数据包uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar uchars) uchar status,uchar_ctr; CSN = 0; status = SPI_ReadWriteByte(reg); for(uchar_ctr=0;uchar_ctruchars;uchar_ctr+) pBufuchar_ctr=SPI_ReadWriteByte(0xFF); CSN = 1; return(status); /*发*送*模*式*代*码*/void TX_Mode(void) CE=0; SPI_RW_Reg(FLUSH_TX,0x00); SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); / 写发送的地址 Writes TX_Address to nRF24L01 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); / 写接受的地址 RX_Addr0 same as TX_Adr for Auto.Ack SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); /*使能自动应答 Enable Auto.Ack:Pipe0 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); /使能通道0 Enable Pipe0 SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); / *自动重发功能设置 500us + 86us, 10 retrans.1a SPI_RW_Reg(WRITE_REG + RF_CH, 40); /收发频率 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); / 发射速率、功耗功能设置 TX_PWR:0dBm, Datarate:1Mbps, LNA:HCURR SPI_RW_Reg(WRITE_REG + RX_PW_P0, (unsigned char)RX_PLOAD_WIDTH); /设置接收数据长度，本次设置为2字节 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); CE=1; delay_ms(100);void Transmit(unsigned char * tx_buf) CE=0; /StandBy I模式 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); /装载接收端地址 SPI_RW_Reg(FLUSH_TX,0x00);/清除FIFO SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); / 装载数据 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); / IRQ收发完成中断响应，16位CRC，主发送 CE=1; /置高CE，激发数据发送 delay_ms(150);/*主函数*/uchar NRF24L01_Check(void)uchar buf5=0XA5,0XA5,0XA5,0XA5,0XA5;uchar i; SPI_Write_Buf(WRITE_REG+TX_ADDR,buf,5);/写入5个字节的地址.SPI_Read_Buf(TX_ADDR,buf,5); /读出写入的地址 for(i=0;i5;i+)if(bufi!=0XA5)break; if(i!=5)return 1;/检测24L01错误return 0; /检测到24L01 void main() uint i=0; CE=0; CSN=1; Init_SPI();while(NRF24L01_Check()/检测不到24L01delay_ms(500);delay_ms(500);led=!led; TX_Mode(); while(1) Transmit(Tx_Buf); /清除F