High-Flying Electronics Technology Co. Ltd HF-A11X Manual Do Utilizador
HF-A11x V3.1 User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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Figure 12. User Device Send Data to HF-A11x Module Procedure
Notes: For Error scheme 1, if HF-A11x receives wrong CRC information of “SEND” command, it
will reply back “SEND ACK”=NOK. If HF-A11x not receives “SEND” command for the link issue,
user device need decide to retry.
will reply back “SEND ACK”=NOK. If HF-A11x not receives “SEND” command for the link issue,
user device need decide to retry.
(This is a procedure HF-A11x module send data to user device procedure)
Figure 13. HF-A11x Module Send Data to User Device Procedure
1.4.2.3. Agreement Transmission CRC Arithmetic
CRC aarithmetic C language reference code as following:
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u16 calc_sum(void *data, u32 len)