SPI写0XA5，读0XA4

2019-10-14 22:31发布

我照搬了原子哥的代码，因为我调试NRF24l01，然后发现一直卡在这里while(NRF24L01_Check()); 我调试后发现是SPI的收发数据不一样，这是要写入的数据u8 buf[5]={0XA5,0XA5,0XA5,0XA5,0XA5};，读出来后变成buf[5]={0XA4,0XA5,0XA5,0XA5,0XA5};,请各位帮我看看，因为换了个32板，所以端口不一样，原理图都发在下面谢谢大家了，感激不尽

void NRF24L01_Init(void){    SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
//配置SCK,MISO,MOSI引脚    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽复用 GPIO_Init(GPIOA, &GPIO_InitStructure); //配置CE引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14 ; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_Init(GPIOB, &GPIO_InitStructure); //配置CSN引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure); //配置IRQ引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //上拉输入 GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource15); EXTI_InitStructure.EXTI_Line=EXTI_Line15; EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;//外部中断 EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;//下降沿触发 EXTI_InitStructure.EXTI_LineCmd=ENABLE; EXTI_Init(&EXTI_InitStructure); SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //双线全双工 SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //主模式 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //数据大小8位 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //时钟极性，空闲时为低 SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //第1个边沿有效，上升沿为采样时刻 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;  //NSS信号由软件产生 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; //8分频，9MHz SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //高位在前 SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI1, &SPI_InitStructure);    SPI_Cmd(SPI1, ENABLE);//使能 SPI1
NRF24L01_CE=0; //使能24L01 NRF24L01_CSN=1; //SPI片选取消
}

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