關于nrf24l01的入門級簡單應用，求教

ID:711402 · 發表于 2020-4-21 16:06

因本人還是小白，想用簡單的按鍵來實現nrf24l01通信。按下按鍵1發送0x01后led閃爍，按下按鍵2發送0x02后led閃爍，我在板子上運行了，只有發射方的燈會閃爍，接收方的燈沒反應，想求教一下。
發送方：

<div>#include<reg52.h></div><div>#define uint unsigned int
</div>#define uchar unsigned char
sbit S1 =P1^0; //????1
sbit S2 =P1^1; //????2
sbit LED=P1^6; //??????????????
uchar Tx_Buf[32];
sbit CE =P2^0;
sbit CSN =P2^1;
sbit SCK =P2^2;
sbit MOSI =P2^3;
sbit MISO =P2^4;
sbit IRQ =P2^5;
#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 payload
uchar TX_ADDRESS[TX_ADR_WIDTH]= {0xE7,0xE7,0xE7,0xE7,0xE7}; //??????
uchar RX_ADDRESS[RX_ADR_WIDTH]= {0xE7,0xE7,0xE7,0xE7,0xE7}; //??????
///***************************************NRF24L01????????*******************************************************
#define READ_REG 0x00 // ??????????
#define WRITE_REG 0x20 // д????????
#define RD_RX_PLOAD 0x61 // ??????????????
#define WR_TX_PLOAD 0xA0 // д???????????
#define FLUSH_TX 0xE1 // ??????? FIFO???
#define FLUSH_RX 0xE2 // ??????? FIFO???
#define REUSE_TX_PL 0xE3 // ?????????????????
#define NOP 0xFF // ????
///*************************************SPI(nRF24L01)????????****************************************************
#define CONFIG 0x00 // ???????????CRCУ??????????????????
#define EN_AA 0x01 // ????????????
#define EN_RXADDR 0x02 // ???????????
#define SETUP_AW 0x03 // ?????????????
#define SETUP_RETR 0x04 // ??????????????
#define RF_CH 0x05 // ???????????
#define RF_SETUP 0x06 // ????????????????????
#define NRFRegSTATUS 0x07 // ???????
#define OBSERVE_TX 0x08 // ????????
#define CD 0x09 // ??????
#define RX_ADDR_P0 0x0A // ???0??????????
#define RX_ADDR_P1 0x0B // ???1??????????
#define RX_ADDR_P2 0x0C // ???2??????????
#define RX_ADDR_P3 0x0D // ???3??????????
#define RX_ADDR_P4 0x0E // ???4??????????
#define RX_ADDR_P5 0x0F // ???5??????????
#define TX_ADDR 0x10 // ???????????
#define RX_PW_P0 0x11 // ???????0???????????
#define RX_PW_P1 0x12 // ???????1???????????
#define RX_PW_P2 0x13 // ???????2???????????
#define RX_PW_P3 0x14 // ???????3???????????
#define RX_PW_P4 0x15 // ???????4???????????
#define RX_PW_P5 0x16 // ???????5???????????
#define FIFO_STATUS 0x17 // FIFO?????????????????
///*****************************???????*********************************************************
uchar NRF24SPI_Send_Byte(uchar dat);
uchar SPI_WR_Reg(uchar reg, uchar value);
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar Len);
uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar Len);
uchar nRF24L01_RxPacket(unsigned char* rx_buf);
void nRF24L01_TxPacket(unsigned char * tx_buf);
uchar SPI_RD_Reg(uchar reg);
void init_NRF24L01(void);
void TX_Mode(void);
void RX_Mode(void);
void NRF_Send(void);
//----------------------------------------------
//????????[MOSI??MISO???????]
//----------------------------------------------
uchar NRF24SPI_Send_Byte(uchar dat)
{
uchar i;
for (i = 0; i < 8; i++) //output 8-bit
{
//д??1λ????
MOSI=(dat & 0x80); //output 'uchar', MSB to MOSI
dat<<= 1; // shift next bit into MSB..
//???1λ????
SCK = 1; // Set SCK high..
if (MISO){
dat|= 1;
}else{ // capture current MISO bit
dat &= 0xFE;
}
SCK = 0; // ..then set SCK low again
}
return(dat); // return read uchar
}
//----------------------------------------------
//???n??10us
//----------------------------------------------
void Delay_n10us(uint n)
{
for(;n>0;n--)
{
unsigned char a,b;
for(b=1;b>0;b--)
for(a=2;a>0;a--);
}
}
//----------------------------------------------
//NRF24L01?????
//----------------------------------------------
void init_NRF24L01(void)
{
Delay_n10us(10);
CE = 0; // chip enable
CSN= 1; // Spi disable
SCK=0; //??????????д
IRQ=1; //?ж??λ
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // д??????
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); // д???????
SPI_WR_Reg(WRITE_REG + EN_AA, 0x01); // ???0??? ACK???????
SPI_WR_Reg(WRITE_REG + EN_RXADDR, 0x01); // ???????????????0?????????????????ο?Page21
SPI_WR_Reg(WRITE_REG + SETUP_RETR, 0x1a); // ???????????????????500us + 86us, 10 retrans...
SPI_WR_Reg(WRITE_REG + RF_CH, 22); // ????????????2.4GHZ????????????
SPI_WR_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); //???y????????????????????32???
SPI_WR_Reg(WRITE_REG + RF_SETUP, 0x07); //???÷????????1MHZ?????書???????0dB
// SPI_RD_Reg(WRITE_REG + EN_AA);
// SPI_RD_Reg(WRITE_REG + EN_RXADDR);
// SPI_RD_Reg(WRITE_REG + RF_CH);
// SPI_RD_Reg(WRITE_REG + RX_PW_P0);
// SPI_RD_Reg(WRITE_REG + RF_SETUP);
}
//----------------------------------------------
//??????uchar SPI_Read(uchar reg)
//?????NRF24L01??SPI???,?????????????????
//----------------------------------------------
uchar SPI_RD_Reg(uchar reg)
{
uchar reg_val;
CSN = 0; // CSN low, initialize SPI communication...
NRF24SPI_Send_Byte(reg); // Select register to read from..
reg_val = NRF24SPI_Send_Byte(0); // ..then read registervalue
CSN = 1; // CSN high, terminate SPI communication
return(reg_val); // return register value
}
//----------------------------------------------
//??????uchar SPI_Write(uchar reg)
//?????NRF24L01??SPI???,д????????????????
//----------------------------------------------
uchar SPI_WR_Reg(uchar reg, uchar value)
{
uchar status;
CSN = 0; // CSN low, init SPI transaction
status = NRF24SPI_Send_Byte(reg); // select register
NRF24SPI_Send_Byte(value); // ..and write value to it..
CSN = 1; // CSN high again
return(status); // return nRF24L01 status uchar
}
//----------------------------------------------
//??????uint SPI_Read_Buf(uchar reg, uchar *pBuf, uchar Len)
//????: ?????????
//??????reg???????????
// pBuf???????????????
// uchars??????????????
//----------------------------------------------
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar Len)
{
uint status,i;
CSN = 0; // Set CSN low, init SPI tranaction
status = NRF24SPI_Send_Byte(reg); // Select register to write to and read status uchar
for(i=0;i<Len;i++){
pBuf[i] = NRF24SPI_Send_Byte(0);
}
CSN = 1;
return(status); // return nRF24L01 status uchar
}
//----------------------------------------------
//??????uint SPI_Write_Buf(uchar reg, uchar *pBuf, uchar Len)
//????: ????д????
//??????reg:?????????
// pBuf?????д????????
// uchars??д??????????
//----------------------------------------------
uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar Len)
{
uint status,i;
CSN = 0; //SPI???
status = NRF24SPI_Send_Byte(reg);
for(i=0; i<Len; i++){
NRF24SPI_Send_Byte(*pBuf);
pBuf ++;
}
CSN = 1; //???SPI
return(status);
}
//----------------------------------------------
//??????void SetRX_Mode(void)
//????????????????
//----------------------------------------------
void RX_Mode(void)
{
CE = 0;
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // д??????
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); // д???????
SPI_WR_Reg(WRITE_REG + EN_AA, 0x01); //???0??? ACK???????
SPI_WR_Reg(WRITE_REG + EN_RXADDR,0x01); //???????????????0?????????????????ο?Page21
SPI_WR_Reg(WRITE_REG + SETUP_RETR,0x1a); //???????????????????500us + 86us, 10 retrans...
SPI_WR_Reg(WRITE_REG + RF_CH, 0x40); //????????????2.4GHZ????????????
SPI_WR_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); //???y????????????????????32???
SPI_WR_Reg(WRITE_REG + RF_SETUP, 0x0F); //???÷????????2MHZ?????書???????0dB
SPI_WR_Reg(WRITE_REG + CONFIG, 0x0F);
CE = 1;
Delay_n10us(20); //200us
}
//----------------------------------------------
//??????unsigned char nRF24L01_RxPacket(unsigned char* rx_buf)
//????????????????rx_buf???????????
//----------------------------------------------
uchar nRF24L01_RxPacket(unsigned char* rx_buf)
{
uchar flag=0;
uchar status;
status=SPI_RD_Reg(NRFRegSTATUS); //?????????????ж???????????
if(status & 0x40) //?ж????????????
{
CE=0; //SPI???
SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH); // read receive payload from RX_FIFO buffer
flag =1; //????????????
}
SPI_WR_Reg(WRITE_REG+NRFRegSTATUS, status); //??????????RX_DR,TX_DS,MAX_RT??????1?????д1??????ж???
return flag;
}
//----------------------------------------------
//??????void TX_Mode(void)
//????????????????
//----------------------------------------------
void TX_Mode(void)
{
CE = 0;
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // д??????
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); // д???????
SPI_WR_Reg(WRITE_REG + EN_AA, 0x01); // ???0??? ACK???????
SPI_WR_Reg(WRITE_REG + EN_RXADDR, 0x01); // ???????????????0?????????????????ο?Page21
SPI_WR_Reg(WRITE_REG + SETUP_RETR, 0x1a); // ???????????????????500us + 86us, 10 retrans...
SPI_WR_Reg(WRITE_REG + RF_CH, 0x40); // ????????????2.4GHZ????????????
SPI_WR_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); //???y????????????????????32???
SPI_WR_Reg(WRITE_REG + RF_SETUP, 0x0F); //???÷????????2MHZ?????書???????0dB
SPI_WR_Reg(WRITE_REG + CONFIG, 0x0E); // CRC????16λCRCУ?飬???
CE = 1;
}
//----------------------------------------------
//??????void nRF24L01_TxPacket(unsigned char * tx_buf)
//?????????tx_buf??????
//----------------------------------------------
void nRF24L01_TxPacket(unsigned char * tx_buf)
{
CE = 0; //StandBy I??
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // ?????????
SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // ???????
CE = 1; //???CE?????????????
}
void delay10ms(void) //?????????10ms
{
uchar x,y;
for(x=0;x<100;x++)
for(y=0;y<100;y++)
;
}
//??????
void main()
{
LED=1; //????????
init_NRF24L01(); //?????
Tx_Buf[0]=0;
while(1)
{
P1=0xff;
if((P1&0x0f)!=0x0f) //????м?????
{
delay10ms(); //???10ms??????
if(S1==0) //????1??????
{
TX_Mode(); //??????
Tx_Buf[0]=0x01;
nRF24L01_TxPacket(Tx_Buf); //????????????24L01
LED=0;
delay10ms();
LED=1;
delay10ms(); //?????LED1?????
}
if(S2==0) //????2??????
{
TX_Mode(); //??????
Tx_Buf[0]=0x01;
nRF24L01_TxPacket(Tx_Buf); //????????????24L01
LED=0;
delay10ms();
LED=1;
delay10ms(); //?????LED1?????
}
}
<div> }</div><div>}
</div>

復制代碼

ID:648281 · 發表于 2020-4-21 18:14

你好！
NRF24L01 調試本身就比較麻煩；
模塊正常運行配置的參數有點多；
所以在調試的時候，要有點耐心；
程序應該你從網上找的吧；
逐段去理解分析吧。

ID:711402 · 發表于 2020-4-24 09:27

本帖最后由 Julia123 于 2020-4-24 13:27 編輯

接收方可以接到數據了，可是為什么要發送方按好幾次按鍵接收方的燈才會亮呢有時候又按好多下也亮不了是會丟失數據嗎

ID:282850 · 發表于 2020-4-24 16:57

丟失數據是可能的，但據你描述，估計RX端處理LED的程序不一定正確，試理一下思路。

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關于nrf24l01的入門級簡單應用，求教