nrf24l01.c与nrf24l01.h，程序示例

以下是一个基本的nrf24l01.c和nrf24l01.h文件的程序示例，仅供参考：

nrf24l01.h 文件：

#ifndef __NRF24L01_H
#define __NRF24L01_H

#include "stm32f10x.h"

//定义NRF24L01的寄存器地址
#define NRF24L01_CONFIG      0x00
#define NRF24L01_EN_AA       0x01
#define NRF24L01_EN_RXADDR   0x02
#define NRF24L01_SETUP_AW    0x03
#define NRF24L01_SETUP_RETR  0x04
#define NRF24L01_RF_CH       0x05
#define NRF24L01_RF_SETUP    0x06
#define NRF24L01_STATUS      0x07
#define NRF24L01_OBSERVE_TX  0x08
#define NRF24L01_CD          0x09
#define NRF24L01_RX_ADDR_P0  0x0A
#define NRF24L01_RX_ADDR_P1  0x0B
#define NRF24L01_RX_ADDR_P2  0x0C
#define NRF24L01_RX_ADDR_P3  0x0D
#define NRF24L01_RX_ADDR_P4  0x0E
#define NRF24L01_RX_ADDR_P5  0x0F
#define NRF24L01_TX_ADDR     0x10
#define NRF24L01_RX_PW_P0    0x11
#define NRF24L01_RX_PW_P1    0x12
#define NRF24L01_RX_PW_P2    0x13
#define NRF24L01_RX_PW_P3    0x14
#define NRF24L01_RX_PW_P4    0x15
#define NRF24L01_RX_PW_P5    0x16
#define NRF24L01_FIFO_STATUS 0x17
#define NRF24L01_DYNPD       0x1C
#define NRF24L01_FEATURE     0x1D

//定义NRF24L01指令
#define NRF24L01_R_REGISTER    0x00
#define NRF24L01_W_REGISTER    0x20
#define NRF24L01_R_RX_PAYLOAD  0x61
#define NRF24L01_W_TX_PAYLOAD  0xA0
#define NRF24L01_FLUSH_TX      0xE1
#define NRF24L01_FLUSH_RX      0xE2
#define NRF24L01_REUSE_TX_PL   0xE3
#define NRF24L01_NOP           0xFF

//定义NRF24L01寄存器位
#define NRF24L01_CONFIG_MASK_RX_DR   0x40
#define NRF24L01_CONFIG_MASK_TX_DS   0x20
#define NRF24L01_CONFIG_MASK_MAX_RT  0x10
#define NRF24L01_CONFIG_EN_CRC      0x08
#define NRF24L01_CONFIG_CRCO        0x04
#define NRF24L01_CONFIG_PWR_UP      0x02
#define NRF24L01_CONFIG_PRIM_RX     0x01

#define NRF24L01_STATUS_RX_DR   0x40
#define NRF24L01_STATUS_TX_DS   0x20
#define NRF24L01_STATUS_MAX_RT  0x10
#define NRF24L01_STATUS_TX_FULL 0x01

#define NRF24L01_RF_SETUP_CONT_WAVE 0x80
#define NRF24L01_RF_SETUP_RF_DR_LOW 0x20
#define NRF24L01_RF_SETUP_PLL_LOCK  0x10

#define NRF24L01_LNA_HCURR 0x01

#define NRF24L01_RX_PW_PX_DEFAULT 0x00

#define NRF24L01_SPI_TIMEOUT 100

//定义NRF24L01模块的IO口
#define NRF24L01_CE_PORT     GPIOB
#define NRF24L01_CE_PIN      GPIO_Pin_0
#define NRF24L01_CSN_PORT    GPIOB
#define NRF24L01_CSN_PIN     GPIO_Pin_1
#define NRF24L01_IRQ_PORT    GPIOB
#define NRF24L01_IRQ_PIN     GPIO_Pin_5

void NRF24L01_GPIO_Init(void);
void NRF24L01_SPI_Init(void);
void NRF24L01_Init(void);
void NRF24L01_CE(uint8_t level);
void NRF24L01_CSN(uint8_t level);
uint8_t NRF24L01_ReadWriteByte(uint8_t txData);
uint8_t NRF24L01_ReadReg(uint8_t regAddr);
void NRF24L01_WriteReg(uint8_t regAddr, uint8_t txData);
void NRF24L01_ReadBuf(uint8_t regAddr, uint8_t *pBuf, uint8_t len);
void NRF24L01_WriteBuf(uint8_t regAddr, uint8_t *pBuf, uint8_t len);
void NRF24L01_SetupRxMode(void);
void NRF24L01_SetupTxMode(void);
void NRF24L01_TxPacket(uint8_t *txBuf, uint8_t len);
uint8_t NRF24L01_RxPacket(uint8_t *rxBuf);

#endif

nrf24l01.c 文件：

#include "nrf24l01.h"

static uint8_t NRF24L01_SPI_SendByte(uint8_t txData)
{
    uint8_t retry = NRF24L01_SPI_TIMEOUT;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
    {
        if (--retry == 0)
        {
            return 0;
        }
    }
    SPI_I2S_SendData(SPI1, txData);

    retry = NRF24L01_SPI_TIMEOUT;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
    {
        if (--retry == 0)
        {
            return 0;
        }
    }
    return SPI_I2S_ReceiveData(SPI1);
}

void NRF24L01_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = NRF24L01_CE_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(NRF24L01_CE_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = NRF24L01_CSN_PIN;
    GPIO_Init(NRF24L01_CSN_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = NRF24L01_IRQ_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(NRF24L01_IRQ_PORT, &GPIO_InitStructure);
}

void NRF24L01_SPI_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

void NRF24L01_Init(void)
{
    NRF24L01_GPIO_Init();
    NRF24L01_SPI_Init();

    NRF24L01_CE(0);
    NRF24L01_CSN(1);
}

void NRF24L01_CE(uint8_t level)
{
    if (level)
    {
        GPIO_SetBits(NRF24L01_CE_PORT, NRF24L01_CE_PIN);
    }
    else
    {
        GPIO_ResetBits(NRF24L01_CE_PORT, NRF24L01_CE_PIN);
    }
}

void NRF24L01_CSN(uint8_t level)
{
    if (level)
    {
        GPIO_SetBits(NRF24L01_CSN_PORT, NRF24L01_CSN_PIN);
    }
    else
    {
        GPIO_ResetBits(NRF24L01_CSN_PORT, NRF24L01_CSN_PIN);
    }
}

uint8_t NRF24L01_ReadWriteByte(uint8_t txData)
{
    NRF24L01_CSN(0);
    uint8_t rxData = NRF24L01_SPI_SendByte(txData);
    NRF24L01_CSN(1);

    return rxData;
}

uint8_t NRF24L01_ReadReg(uint8_t regAddr)
{
    NRF24L01_CSN(0);
    NRF24L01_SPI_SendByte(NRF24L01_R_REGISTER | regAddr);
    uint8_t regValue = NRF24L01_SPI_SendByte(NRF24L01_NOP);
    NRF24L01_CSN(1);

    return regValue;
}

void NRF24L01_WriteReg(uint8_t regAddr, uint8_t txData)
{
    NRF24L01_CSN(0);
    NRF24L01_SPI_SendByte(NRF24L01_W_REGISTER | regAddr);
    NRF24L01_SPI_SendByte(txData);
    NRF24L01_CSN(1);
}

void NRF24L01_ReadBuf(uint8_t regAddr, uint8_t *pBuf, uint8_t len)
{
    NRF24L01_CSN(0);
    NRF24L01_SPI_SendByte(NRF24L01_R_REGISTER | regAddr);
    for (uint8_t i = 0; i < len; i++)
    {
        pBuf[i] = NRF24L01_SPI_SendByte(NRF24L01_NOP);
    }
    NRF24L01_CSN(1);
}

void NRF24L01_WriteBuf(uint8_t regAddr, uint8_t *pBuf, uint8_t len)
{
    NRF24L01_CSN(0);
    NRF24L01_SPI_SendByte(NRF24L01_W_REGISTER | regAddr);
    for (uint8_t i = 0; i < len; i++)
    {
        NRF24L01_SPI_SendByte(pBuf[i]);
    }
    NRF24L01_CSN(1);
}

void NRF24L01_SetupRxMode(void)
{
    NRF24L01_CE(0);
    NRF24L01_WriteReg(NRF24L01_CONFIG, NRF24L01_CONFIG_EN_CRC | NRF24L01_CONFIG_CRCO | NRF24L01_CONFIG_PWR_UP | NRF24L01_CONFIG_PRIM_RX);
    NRF24L01_WriteReg(NRF24L01_EN_AA, 0x01);
    NRF24L01_WriteReg(NRF24L01_EN_RXADDR, 0x01);
    NRF24L01_WriteReg(NRF24L01_SETUP_RETR, 0x5F);
    NRF24L01_WriteReg(NRF24L01_RF_CH, 0x02);
    NRF24L01_WriteReg(NRF24L01_RF_SETUP, NRF24L01_RF_SETUP_RF_DR_LOW | NRF24L01_RF_SETUP_CONT_WAVE | NRF24L01_RF_SETUP_PLL_LOCK);
    NRF24L01_WriteReg(NRF24L01_RX_PW_P0, 0x20);
    NRF24L01_WriteReg(NRF24L01_FEATURE, 0x06);

    NRF24L01_CE(1);
}

void NRF24L01_SetupTxMode(void)
{
    NRF24L01_CE(0);
    NRF24L01_WriteReg(NRF24L01_CONFIG, NRF24L01_CONFIG_EN_CRC | NRF24L01_CONFIG_CRCO | NRF24L01_CONFIG_PWR_UP | !NRF24L01_CONFIG_PRIM_RX);
    NRF24L01_WriteReg(NRF24L01_EN_AA, 0x01);
    NRF24L01_WriteReg(NRF24L01_EN_RXADDR, 0x01);
    NRF24L01_WriteReg(NRF24L01_SETUP_RETR, 0x5F);
    NRF24L01_WriteReg(NRF24L01_RF_CH, 0x02);
    NRF24L01_WriteReg(NRF24L01_RF_SETUP, NRF24L01_RF_SETUP_RF_DR_LOW | NRF24L01_RF_SETUP_CONT_WAVE | NRF24L01_RF_SETUP_PLL_LOCK);
    NRF24L01_WriteReg(NRF24L01_RX_PW_P0, 0x20);
    NRF24L01_WriteReg(NRF24L01_FEATURE, 0x06);

    NRF24L01_CE(1);
}

void NRF24L01_TxPacket(uint8_t *txBuf, uint8_t len)
{
    NRF24L01_CE(0);

    NRF24L01_WriteBuf(NRF24L01_W_TX_PAYLOAD, txBuf, len);

    NRF24L01_CE(1);
    GPIO_ResetBits(NRF24L01_CE_PORT, NRF24L01_CE_PIN);
    delay_us(10);
    NRF24L01_CE(0);
}

uint8_t NRF24L01_RxPacket(uint8_t *rxBuf)
{
    uint8_t status = NRF24L01_ReadReg(NRF24L01_STATUS);
    if (status & NRF24L01_STATUS_RX_DR)
    {
        NRF24L01_ReadBuf(NRF24L01_R_RX_PAYLOAD, rxBuf, 32);
        NRF24L01_WriteReg(NRF24L01_STATUS, status | NRF24L01_STATUS_RX_DR);

        return 1;
    }

    return 0;
}

这个程序示例是基于STM32F10x的，如果您使用其他单片机，您可能需要根据您的单片机进行适当的修改。