STM32硬件SPI驱动SD卡和W25X16和NRF24L01出现问题……

李义_金点子行动

<h2><b>各位大侠：<br />
&nbsp; &nbsp; 我用STM32的硬件SPI同时驱动</b>驱动SD卡和W25X16和NRF24L01，SD卡和W25X16可以工作，SPI初始化函数如下：</h2>
<div style="text-align:center;">&nbsp; &nbsp;&nbsp;void SPIx_Init(void)</div>
<div style="text-align:center;">{<span class="Apple-tab-span" style="white-space:pre;">        </span>&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>RCC-&gt;APB2ENR|=1&lt;&lt;2; &nbsp; &nbsp; &nbsp; //PORTA时钟使能 <span class="Apple-tab-span" style="white-space:pre;">        </span>&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>RCC-&gt;APB2ENR|=1&lt;&lt;12; &nbsp; &nbsp; &nbsp;//SPI1时钟使能&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">                </span> &nbsp;&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>//这里只针对SPI口初始化</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;CRL&amp;=0X000FFFFF;&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;CRL|=0XBBB00000;//PA5.6.7复用 <span class="Apple-tab-span" style="white-space:pre;">        </span> &nbsp; &nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;ODR|=0X7&lt;&lt;5; &nbsp; &nbsp;//PA5.6.7上拉</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">                </span></div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;10;//全双工模式<span class="Apple-tab-span" style="white-space:pre;">        </span></div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;9; //软件nss管理</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;8; &nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span></div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;2; //SPI主机</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;11;//8bit数据格式<span class="Apple-tab-span" style="white-space:pre;">        </span></div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;1; //空闲模式下SCK为1 CPOL=1</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;0; //数据采样从第二个时间边沿开始,CPHA=1 &nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=7&lt;&lt;3; //Fsck=Fcpu/256</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;7; //MSBfirst &nbsp;&nbsp;</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;6; //SPI设备使能</div>
<div style="text-align:center;"><span class="Apple-tab-span" style="white-space:pre;">        </span>SPIx_ReadWriteByte(0xff);//启动传输<span class="Apple-tab-span" style="white-space:pre;">                </span>&nbsp;</div>
<div style="text-align:center;">} &nbsp;&nbsp;<br />
<br />
<h2 style="text-align:left;">&nbsp; &nbsp; NRF24L01的SPI初始化用这个才能通过：</h2>
<h2 style="text-align:center;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;void NRF_SPIx_Init(void)</h2>
<h2>{<span class="Apple-tab-span" style="white-space:pre;">        </span>&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>RCC-&gt;APB2ENR|=1&lt;&lt;2; &nbsp; &nbsp; &nbsp; //PORTA时钟使能 <span class="Apple-tab-span" style="white-space:pre;">        </span>&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>RCC-&gt;APB2ENR|=1&lt;&lt;12; &nbsp; &nbsp; &nbsp;//SPI1时钟使能&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">                </span> &nbsp;&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>//这里只针对SPI口初始化</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;CRL&amp;=0X000FFFFF;&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;CRL|=0XBBB00000;//PA5.6.7复用 <span class="Apple-tab-span" style="white-space:pre;">        </span> &nbsp; &nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>GPIOA-&gt;ODR|=0X7&lt;&lt;5; &nbsp; &nbsp;//PA5.6.7上拉</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">                </span></h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;10;//全双工模式<span class="Apple-tab-span" style="white-space:pre;">        </span></h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;9; //软件nss管理</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;8; &nbsp;</h2>
<h2><br />
</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;2; //SPI主机</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;11;//8bit数据格式<span class="Apple-tab-span" style="white-space:pre;">        </span></h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>//对24L01要设置 CPHA=0;CPOL=0;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;1; //CPOL=0时空闲模式下SCK为0 <span class="Apple-tab-span" style="white-space:pre;">                </span> &nbsp;&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;0; //第一个时钟的下降沿,CPHA=1 CPOL=1<span class="Apple-tab-span" style="white-space:pre;">        </span> &nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=7&lt;&lt;3; //Fsck=Fcpu/256</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=0&lt;&lt;7; //MSBfirst &nbsp;&nbsp;</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPI1-&gt;CR1|=1&lt;&lt;6; //SPI设备使能</h2>
<h2><span class="Apple-tab-span" style="white-space:pre;">        </span>SPIx_ReadWriteByte(0xff);//启动传输<span class="Apple-tab-span" style="white-space:pre;">                </span></h2>
<h2>} &nbsp;&nbsp;</h2>
<h2 style="text-align:left;">&nbsp; &nbsp; 但是三个同时工作的话无线模块就不能工作了，请各位大侠告之，如何才能兼容这三个SPI器件？多谢啊！<br />
</h2>
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xiaoyan

回复【楼主位】李义_金点子行动:
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<br>当其中一个工作的时候，用CS片选信号禁止其他的。

ricefat

片选弄了吗？设置好互斥机制，一个SPI设备使能的时候，另外两个不能使能

八度空间

NRF24L01这个家伙和SD卡等在SPI空闲时候的控制电平不一样的，个人建议还是分开好点