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NRF24L01P-R 数据表(PDF) 31 Page - Nordic Semiconductor |
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NRF24L01P-R 数据表(HTML) 31 Page - Nordic Semiconductor |
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31 / 78 page  Revision 1.0 Page 31 of 78 nRF24L01+ Product Specification 7.3.6 Automatic packet assembly The automatic packet assembly assembles the preamble, address, packet control field, payload and CRC to make a complete packet before it is transmitted. Figure 7. Automatic packet assembly Start: Collect Address from TX_ADDR register TX_ADDR MSB =1 Add preamble 0x55 Add preamble 0xAA EN_DPL=1 PID[7:3]= #bytes in TX_FIFO SPI TX command: W_TX_PAYLOAD PID[0]=0 PID[0]=1 PID[2:1]++ Collect Payload from TX_FIFO Calculate and add 1 Byte CRC based on Address, PID and Payload EN_CRC = 1 CRCO = 1 Calculate and add 2 Byte CRC based on Address, PID and Payload STOP New data in TX_FIFO REUSE_TX_PL active |
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