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首先，我用的是手柄做的无线模块的检测，通过写入一个地址然后读出，来检测无线收发模块是否存在。

spi配置：

void SPI_Configuration() { SPI_InitTypeDef SPI_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB1Periph_SPI2| RCC_APB2Periph_GPIOA| RCC_APB2Periph_GPIOB| RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_13; //PB13-SCK PB15-MOSI GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;//PB14-MISO GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14;//PC13-CSN PC14-CE GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; //PC15-IPU GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOC, &GPIO_InitStructure); /* 配置SPI1模块 初始化*/ SPI_I2S_DeInit(SPI2); SPI_Cmd(SPI2, DISABLE); //必须先禁用,才能改变MODE SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //两线全双工 SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //主 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //8位 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //CPOL=0 时钟悬空低 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //CPHA=0 数据捕获第1个 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //软件NSS SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4 ; //256分频 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB; //高位在前 SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC7 SPI_Init(SPI2, &SPI_InitStructure); SPI_Cmd(SPI2, ENABLE); //SPI_ReadWriteByte(0xff); //启动传输 }

nrf init

//24L01片选信号 #define CE_H() GPIO_SetBits(GPIOC, GPIO_Pin_14) #define CE_L() GPIO_ResetBits(GPIOC, GPIO_Pin_14) //SPI片选信号 #define CSN_H() GPIO_SetBits(GPIOC, GPIO_Pin_13) #define CSN_L() GPIO_ResetBits(GPIOC, GPIO_Pin_13)

void NRF24L01_Init(void) { CE_L(); //使能24L01 CSN_H(); //SPI片选取消 }

spi 字节收发

u8 SPI_ReadWriteByte(u8 data) { u8 temp; printf(" Enter SPIRW%d\n ",data); while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); /* Send SPI2 data */ SPI_I2S_SendData(SPI2, data); printf(" send ok "); while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); /* Read SPI2 received data */ temp = SPI_I2S_ReceiveData(SPI2); printf(" Leave SPIRW%d\n ",temp); return temp; //返回收到的数据 }

每次都会死在这一句

while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);

mian 函数相关部分

SPI_Configuration(); NRF24L01_Init(); //printf("aaaUART SUCCESS!!!");Delay(0x1EFF); if(NRF24L01_Check()==0) printf(" nrf check success"); while (1) {}

其中NRF24L01_Check：

u8 NRF24L01_Check(void) { u8 buf[5]={0XA5,0XA5,0XA5,0XA5,0XA5}; u8 i; SPI2_SetSpeed(SPI_SPEED_8); //spi速度为9Mhz（24L01的最大SPI时钟为10Mhz） NRF24L01_Write_Buf(WRITE_REG+TX_ADDR,buf,5);//写入5个字节的地址. NRF24L01_Read_Buf(TX_ADDR,buf,5); //读出写入的地址 for(i=0;i<5;i++)if(buf[i]!=0XA5)break; if(i!=5)return 1;//检测24L01错误 return 0; //检测到24L01 }

每次spi发送就会死机，求大神解答！！！