NRF24L01 "Send Failed"的问题

justin小默 · 发表于 2013-9-23 03:44:16

<div>原子哥，你的这个代码很智能，没有接收端就会显示”Send Failed“ ，但是我不知道为什么，有没有发送完成和有没有接收端有什么关系？他是怎么检测到有没有接收端？<br />
找了很久没找到原因<br />
<br />
while(1)</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>{<span class="Apple-tab-span" style="white-space:pre;"> </span>  <span class="Apple-tab-span" style="white-space:pre;"> </span>   <span class="Apple-tab-span" style="white-space:pre;"> </span> </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>if(NRF24L01_TxPacket(tmp_buf)==TX_OK) //如果发送完成【tmp_buf是发送的数据】</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>{<span class="Apple-tab-span" style="white-space:pre;"> </span></div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>LCD_ShowString(60,170,"Sended DATA:");<span class="Apple-tab-span" style="white-space:pre;"> </span></div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>LCD_ShowString(0,190,tmp_buf); <span class="Apple-tab-span" style="white-space:pre;"> </span></div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>key=mode;</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>for(t=0;t<32;t++)</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>{</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>key++;</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>if(key>('~'))key=' ';</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>tmp_buf[t]=key;<span class="Apple-tab-span" style="white-space:pre;"> </span>//【将要发送的数据存入tmp_buf[32]数组】</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>}</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>mode++; </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>if(mode>'~')mode=' ';  <span class="Apple-tab-span" style="white-space:pre;"> </span>  </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>tmp_buf[32]=0;//加入结束符<span class="Apple-tab-span" style="white-space:pre;"> </span>   </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>}else</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>{<span class="Apple-tab-span" style="white-space:pre;"> </span>   <span class="Apple-tab-span" style="white-space:pre;"> </span></div>
<div> <span class="Apple-tab-span" style="white-space:pre;"> </span>LCD_ShowString(60,170,"Send Failed "); <span style="color:#e53333;">/*【发送数据但是没有接收端会显示失败,为什么？*/</span></div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>LCD_Fill(0,188,240,218,WHITE);//清空上面的显示<span class="Apple-tab-span" style="white-space:pre;"> </span>   </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>};</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>LED0=!LED0;</div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>delay_ms(1500);<span class="Apple-tab-span" style="white-space:pre;"> </span>    </div>
<div><span class="Apple-tab-span" style="white-space:pre;"> </span>};</div>

正点原子 · 发表于 2013-9-23 12:43:07

回复【楼主位】justin小默:
<br>---------------------------------
<br>因为启用了自动ACK功能，即发送端发送数据后，必须收到接收端反馈的ACK，才认为发送成功，只要没收到来自接收端的ACK信号，那就认为此次发送失败。

justin小默 · 发表于 2013-9-23 13:37:07

<br />
我把自动ACK这段注释了，对程序也没影响......没有接收端还是会显示“Send Failed”...

justin小默 · 发表于 2013-9-23 13:37:48

回复【2楼】正点原子:
<br>---------------------------------
<br>void RX_Mode(void) 
<br>{ 
<br>NRF24L01_CE=0;    
<br>   NRF24L01_Write_Buf(WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH);//写RX节点地址 
<br>   
<br>//   NRF24L01_Write_Reg(WRITE_REG+EN_AA,0x01);    //使能通道0的自动应答【接收到数据产生应答】     
<br>   NRF24L01_Write_Reg(WRITE_REG+EN_RXADDR,0x01);//使能通道0的接收地址     
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_CH,40);      //设置RF通信频率     
<br>   NRF24L01_Write_Reg(WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH);//选择通道0的有效数据宽度       
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_SETUP,0x0f);//设置TX发射参数,0db增益,2Mbps,低噪声增益开启    
<br>   NRF24L01_Write_Reg(WRITE_REG+CONFIG, 0x0f);//配置基本工作模式的参数

WR_UP,EN_CRC,16BIT_CRC,接收模式  
<br>   NRF24L01_CE = 1; //CE为高,进入接收模式  
<br>}    
<br>
<br>void TX_Mode(void) 
<br>{    
<br>NRF24L01_CE=0;      
<br>   NRF24L01_Write_Buf(WRITE_REG+TX_ADDR,(u8*)TX_ADDRESS,TX_ADR_WIDTH);//写TX节点地址  
<br>   NRF24L01_Write_Buf(WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH); //设置TX节点地址,主要为了使能ACK    
<br>
<br>//   NRF24L01_Write_Reg(WRITE_REG+EN_AA,0x01);     //使能通道0的自动应答     
<br>   NRF24L01_Write_Reg(WRITE_REG+EN_RXADDR,0x01); //使能通道0的接收地址   
<br>   NRF24L01_Write_Reg(WRITE_REG+SETUP_RETR,0x1a);//设置自动重发间隔时间:500us + 86us;最大自动重发次数:10次 
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_CH,40);       //设置RF通道为40 
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_SETUP,0x0f);  //设置TX发射参数,0db增益,2Mbps,低噪声增益开启    
<br>   NRF24L01_Write_Reg(WRITE_REG+CONFIG,0x0e);    //配置基本工作模式的参数

WR_UP,EN_CRC,16BIT_CRC,接收模式,开启所有中断 
<br>NRF24L01_CE=1;//CE为高,10us后启动发送 
<br>}
<br>
<br>我把自动ACK这段注释了，对程序也没影响......没有接收端还是会显示“Send Failed”...

正点原子 · 发表于 2013-9-23 19:45:52

这个是你要的配置：
<br>void NRF24L01_TX_Mode(void)
<br>{  
<br> NRF24L01_CE=0;     
<br>   NRF24L01_Write_Buf(WRITE_REG+TX_ADDR,(u8*)TX_ADDRESS,TX_ADR_WIDTH);//写TX节点地址 
<br>   //NRF24L01_Write_Buf(WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH); //设置TX节点地址,主要为了使能ACK   
<br>
<br>   NRF24L01_Write_Reg(WRITE_REG+EN_AA,0);     //关闭通道0的自动应答    
<br>   NRF24L01_Write_Reg(WRITE_REG+EN_RXADDR,0); //关闭通道0的接收地址  
<br>   NRF24L01_Write_Reg(WRITE_REG+SETUP_RETR,0);//关闭自动重发送
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_CH,40);       //设置RF通道为40
<br>   NRF24L01_Write_Reg(WRITE_REG+RF_SETUP,0x0f);  //设置TX发射参数,0db增益,2Mbps,低噪声增益开启   
<br>   NRF24L01_Write_Reg(WRITE_REG+CONFIG,0x0e);    //配置基本工作模式的参数

WR_UP,EN_CRC,16BIT_CRC,接收模式,开启所有中断
<br> NRF24L01_CE=1;//CE为高,10us后启动发送
<br>}