stm32f103c8t6用nrf24l01代码

以下是一个基于STM32F103C8T6和nRF24L01的简单代码示例，使用了SPI1控制器和PA4引脚作为CE引脚。

#include "stm32f10x.h"

// 定义SPI控制器和CE引脚
#define SPIx SPI1
#define CE_PIN GPIO_Pin_4
#define CE_PORT GPIOA

void nRF24L01_init(void);
void nRF24L01_CE(int level);
void nRF24L01_write_reg(uint8_t reg, uint8_t data);
uint8_t nRF24L01_read_reg(uint8_t reg);

int main(void) {
    // 初始化SPI1控制器和CE引脚
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Pin = CE_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(CE_PORT, &GPIO_InitStructure);

    SPI_InitTypeDef SPI_InitStructure;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_Init(SPIx, &SPI_InitStructure);
    SPI_Cmd(SPIx, ENABLE);

    // 初始化nRF24L01
    nRF24L01_init();

    while (1) {
        // 发送数据
        uint8_t data[] = {0x01, 0x02, 0x03};
        nRF24L01_CE(1);
        nRF24L01_write_reg(0x07, 0b00111000);  // 写TX FIFO寄存器
        SPIx->DR = data[0];
        while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
        SPIx->DR = data[1];
        while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
        SPIx->DR = data[2];
        while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
        nRF24L01_CE(0);
        while (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));  // 等待发送完成

        // 延时
        for (int i = 0; i < 1000000; i++);
    }
}

void nRF24L01_init(void) {
    nRF24L01_CE(0);
    nRF24L01_write_reg(0x20, 0b00000110);  // Enable 2-byte CRC and Power Up
    nRF24L01_write_reg(0x21, 0b00000000);  // Disable auto-acknowledge
    nRF24L01_write_reg(0x22, 0b00000000);  // Disable retransmission
    nRF24L01_write_reg(0x23, 0b00000001);  // Set channel to 2.401 GHz
    nRF24L01_write_reg(0x24, 0b00000000);  // Set data rate to 1 Mbps
    nRF24L01_write_reg(0x25, 0b00000111);  // Set output power to 0 dBm
    nRF24L01_write_reg(0x26, 0b00000000);  // Disable dynamic payload length and enable ACK payload
    nRF24L01_write_reg(0x27, 0b00000000);  // Disable dynamic payload length
    nRF24L01_write_reg(0x3C, 0b00000000);  // Flush TX FIFO
    nRF24L01_write_reg(0x3D, 0b00000000);  // Flush RX FIFO
}

void nRF24L01_CE(int level) {
    if (level) {
        GPIO_SetBits(CE_PORT, CE_PIN);
    } else {
        GPIO_ResetBits(CE_PORT, CE_PIN);
    }
}

void nRF24L01_write_reg(uint8_t reg, uint8_t data) {
    GPIO_ResetBits(GPIOA, GPIO_Pin_1);  // 使能nRF24L01
    SPIx->DR = 0x20 | reg;  // 写寄存器指令
    while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
    SPIx->DR = data;
    while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
    GPIO_SetBits(GPIOA, GPIO_Pin_1);  // 禁止nRF24L01
}

uint8_t nRF24L01_read_reg(uint8_t reg) {
    uint8_t data;
    GPIO_ResetBits(GPIOA, GPIO_Pin_1);  // 使能nRF24L01
    SPIx->DR = reg;  // 读寄存器指令
    while (!(SPIx->SR & SPI_I2S_FLAG_TXE));
    SPIx->DR = 0xFF;
    while (!(SPIx->SR & SPI_I2S_FLAG_RXNE));
    data = SPIx->DR;
    GPIO_SetBits(GPIOA, GPIO_Pin_1);  // 禁止nRF24L01
    return data;
}

需要注意的是，此示例代码中的nRF24L01_init()函数仅设置了基本的配置，您可能需要根据自己的需求进行更改。另外，由于nRF24L01是一个SPI设备，因此在使用它之前，需要先初始化SPI控制器，并正确连接它的MISO、MOSI、SCK和CSN引脚。