nrf24l01无线模块基于51单片机的发送程序
#include
#include
typedef unsigned char uchar;
typedef unsigned char uint;
sbit CE =P1^1;
sbit CSN =P1^2;
sbit SCK =P1^3;
sbit MOSI =P1^4;
sbit MISO =P1^5;
sbit IRQ =P1^6;
uchar TxBuf2[1]={0};
#define TX_ADR_WIDTH 5 // 5 uints TX address width
#define RX_ADR_WIDTH 5 // 5 uints RX address width
#define TX_PLOAD_WIDTH 1 // 20 uints TX payload
#define RX_PLOAD_WIDTH 1 // 20 uints TX payload
uint const TX_ADDRESS[TX_ADR_WIDTH]= {0x34,0x43,0x10,0x10,0x01}; //本地地址
uint const RX_ADDRESS[RX_ADR_WIDTH]= {0x34,0x43,0x10,0x10,0x01}; //接收地址
#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
#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_P4 0x15 // 接收频道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 Delay(unsigned int s);
void inerDelay_us(unsigned char n);
void init_NRF24L01(void);
uint SPI_RW(uint uchar);
uint SPI_RW_Reg(uchar reg, uchar value);
uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars);
void nRF24L01_TxPacket(unsigned char * tx_buf);
void Delay(unsigned int s)
{
unsigned int i;
for(i=0; i
uint bdata sta; //状态标志
sbit RX_DR =sta^6;
sbit TX_DS =st
a^5;
sbit MAX_RT =sta^4;
void inerDelay_us(unsigned char n)
{
for(;n>0;n--)
_nop_();
}
void init_NRF24L01(void)
{
inerDelay_us(100);
CE=0; // chip enable
CSN=1; // Spi disable
SCK=0;
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes) &
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01);
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
SPI_RW_Reg(WRITE_REG + SETUP_AW, 0x02); // Setup address width=5 bytes
SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans...
SPI_RW_Reg(WRITE_REG + RF_CH, 0);
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:1Mbps,
SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH);
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); //CE=1; //
}
uint SPI_RW(uint uchar)
{
uint bit_ctr;
for(bit_ctr=0;bit_ctr<8;bit_ctr++) // output 8-bit
{
MOSI = (uchar & 0x80); // output 'uchar', MSB to MOSI
uchar = (uchar << 1); // shift next bit into MSB..
SCK = 1; // Set SCK high..
uchar |= MISO; // capture current MISO bit
SCK = 0; // ..then set SCK low again
}
return(uchar); // return read uchar
}
uint SPI_RW_Reg(uchar reg, uchar value)
{
uint 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 uchar
}
uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar uchars)
{
uint status,uchar_ctr;
CSN = 0; //SPI使能
status = SPI_RW(reg);
for(uchar_ctr=0; uchar_ctr
CSN = 1; //关闭SPI
return(status); //
}
void nRF24L01_TxPacket(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_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
inerDelay_us(10);CE=0;SPI_RW_Reg(WRITE_REG+STATUS,0XFF);
}
void main(void)
{
uchar a=0;
init_NRF24L01() ;
Delay(6000);
while(1)
{
Delay(1000);
if(a==100)a=0;
*TxBuf2=a; a++;
nRF24L01_TxPacket(TxBuf2);
}
}