对nRF24L01无线发送和接收模块而言，它采用两种方式对数据包进行处

For the nRF24L01 wireless sending and receiving module, it uses two ways to process data packets, one is the ShockBurstTM mode, and the other is the enhanced ShockBurstTM mode. Both of these data packet processing methods use the micro control unit. The MCU and nRF24L01 wireless transmit and receive modules are connected to each other through a serial peripheral interface SPI. <br>① ShockBurstTM mode <br>When the ShockBurstTM mode is used to receive the signal, if the receiving end receives the accurate address and data, then the receiving end informs the micro control unit through interrupt request IRQ that the MCU information has been accurately received, and then the micro control unit passes the RXFIFO The register reads the received address and data. When using this mode for data and address transmission, a cyclic redundancy check code can be automatically generated. When the data is completely sent, the interrupt request IRQ at the receiving end informs the micro control unit that the MCU information has been sent, which can greatly reduce the micro control. The unit MCU queries the information deterministically, thereby improving work efficiency. In addition, the nRF24L01 wireless communication module contains two types of registers, one is the RXFIFO register, and the other is the TXFIFO register. Whether in transceiver mode, shutdown mode, or idle mode, the MCU can control the FIFO register. Conduct an interview. <br>② Enhanced ShockBurstTM mode <br>For the enhanced ShockBurstTM mode, it maintains the workload of the MCU of the micro-control unit, and has both an automatic answer function and an automatic retransmission function. Its main process is as follows: First, the sending end sends out a signal, and when the receiving end receives the address and data sent out, it will reply to the sending end through the automatic answer function, and then the sending end will detect the feedback information. If the information detection is correct, the sending end continues to send the next message. If the information detection is incorrect, the automatic retransmission function is executed until the information is transmitted correctly. In addition, the response and retransmission functions in the enhanced ShockBurstTM mode are automatically run without manual operation. It can be seen from this that using the enhanced ShockBurstTM mode to process data packets has the advantages of low power loss, low cost, and strong anti-interference.<br>After comprehensive consideration, so in this design we use the enhanced ShockBurstTM mode to process the data packet. <br>(2) Automatic answering function The <br>automatic answering function mainly serves the information receiving end. The automatic answering function means that when the receiving end receives the signal, the receiving end will automatically feed back information to the sending end, so as to detect the accuracy of the information well. When the information is confirmed to be correct, the system will enter the normal working state. This function greatly reduces the workload of the micro control unit MCU, reduces current consumption, and greatly improves work efficiency. <br>(3) Automatic retransmission function The <br>automatic retransmission function mainly serves the information sending end. When the sending end detects that the feedback information of the receiving end is correct, then the system will enter the normal working mode, if the sending end has no data to be sent, then the sending end enters the idle mode. Once an error in the feedback information is detected, the system automatically returns to the sending mode to retransmit the erroneous data until the data is accurate.

For the nRF24L01 wireless transmission and reception module, it processes packets in two ways, one in shockTM mode and the other in the enhanced ShockBurstBurstTM mode, both of which are handled by connecting the microcontrol unit MCU and nRF24L01 wireless transmission and receiving modules to each other via the serial peripheral interface SPI.<br> (1) ShockBurstTM mode<br>When the signal is received using the ShockBurstTM mode, if the receiving end receives the exact address and data, then the receiving end notifies the micro-control unit MCU information by interrupt requesting IRQ that the received address and data are received accurately, and then the microcontrol unit reads the received address and data through the RXFIFO register. When using this mode to send data and addresses, the circular redundant check code can be automatically generated, and when the data is fully sent, the interrupt request IRQ at the receiving end tells the micro-control unit MCU information has been sent, which can greatly reduce the query time of the micro-control unit MCU to the information certainty, thus improving the work efficiency. In addition, the inside of the nRF24L01 wireless communication module contains two types of registers, one is RXFIFO register, the other is the TXFIFO register, whether in transceiver mode, shutdown mode or idle mode, the micro-control unit MCU can access the FIFO register.<br>(2) Enhanced ShockBurstTM mode<br>For the enhanced ShockBurstTM mode, it maintains the microcontrol unit MCU workload while maintaining both automatic response and auto-re-issue function. Its main process is: first by the sender signal, when the receiving side receives the emitted address and data, through the automatic answer function to reply to the sender, and then the sender to detect the feedback information. If the information is detected correctly, then the sender continues to send the next message, if the information detection is wrong, then perform the automatic resend function until the information transmission is correct. In addition, the response and re-issue functions in enhanced ShockBurstTM mode are automatic and do not require manual operation. It can be seen that the processing of packets using the enhanced ShockBurstTM mode has the advantages of low power loss, low cost and strong anti-jamming.<br> After all consideration, we processed the packets using the enhanced ShockBurstTM model.<br>(2) Auto-response function<br>The auto-answer function is mainly for the information receiving end of the service. The auto-answer function refers to when the receiving end receives a signal, then the receiver automatically provides information feedback to the sender in order to detect the accuracy of the information very well. When the information is confirmed, the system goes into a normal state. This function greatly reduces the workload of the micro-control unit MCU, reduces the current loss, and greatly improves the efficiency of work.<br>(3) Auto-re-issue function<br> The automatic reissue function is mainly for the sender of information service. When the sender detects that the receiving feedback is correct, the system then enters normal operation mode, and if the sender does not have the data to send, the sender enters idle mode. Once an error is detected in the feedback, the system automatically returns to the send mode to resend the error data until it is accurate.

For nRF24L01 wireless sending and receiving module, it uses two ways to process data packets, one is shockbursttm mode, the other is enhanced shockbursttm mode. The two ways of processing data packets are to connect MCU and nRF24L01 wireless sending and receiving module through serial peripheral interface SPI.<br>① ShockBurst TM mode<br>When the shockbursttm mode is used to receive the signal, if the receiver receives the accurate address and data, then the receiver informs the MCU that the information has been received accurately through the interrupt request IRQ, and then the MCU reads the received address and data through the rxfifo register. When the first mock exam is used to send data and address, it can automatically generate CRC. When the data is sent to the end, the interrupt request IRQ of the receiving terminal tells the MCU to send the micro control unit MCU, which greatly reduces the time of querying information for the microcontrol unit, and improves the work efficiency. In addition, there are two kinds of registers in nRF24L01 wireless communication module, one is rxfifo register, and the other is txfifo register. Whether in transceiver mode, shutdown mode or idle mode, MCU can access FIFO register.<br>② Enhanced ShockBurst TM mode<br>For the enhanced ShockBurst TM mode, it not only keeps the workload of MCU, but also has the function of automatic response and automatic retransmission. Its main flow is as follows: first, the sender sends out a signal. When the receiver receives the address and data, it replies to the sender through the automatic response function, and then the sender detects the feedback information. If there is no error in the information detection, the sender will continue to send the next message. If there is an error in the information detection, the automatic resend function will be executed until the information transmission is correct. In addition, the response and resend functions in the enhanced ShockBurst TM mode are all automatic and do not need manual operation. It can be seen that the enhanced ShockBurst TM mode has the advantages of low power loss, low cost and strong anti-interference.<br>After comprehensive consideration, we use the enhanced ShockBurst TM mode to process the data package in this design.<br>(2) Auto answer function<br>The automatic response function is mainly for the information receiver. The automatic response function refers to that when the receiving end receives the signal, the receiving end will automatically feed back the information to the sending end, so as to detect the accuracy of the information. When the information is confirmed to be correct, the system will enter the normal working state. This function greatly reduces the workload of MCU, reduces the current loss, and greatly improves the work efficiency.<br>(3) Automatic resend function<br>The function of automatic resend is mainly for the information sender. When the sender detects that the feedback information of the receiver is correct, then the system will enter the normal working mode. If the sender has no data to send, then the sender will enter the idle mode. Once an error is detected in the feedback information, the system will automatically return to the sending mode to resend the error data until the data is accurate.