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请参考官方函数实现 
- /*! ------------------------------------------------------------------------------------------------------------------
 
 -  * @fn dwt_readrxtimestamp()
 
 -  *
 
 -  * @brief This is used to read the RX timestamp (adjusted time of arrival)
 
 -  *
 
 -  * input parameters
 
 -  * @param timestamp - a pointer to a 5-byte buffer which will store the read RX timestamp time
 
 -  *
 
 -  * output parameters - the timestamp buffer will contain the value after the function call
 
 -  *
 
 -  * no return value
 
 -  */
 
 - void dwt_readrxtimestamp(uint8 * timestamp)
 
 - {
 
 -    dwt_readfromdevice(RX_TIME_ID, 0, RX_TIME_RX_STAMP_LEN, timestamp) ; // Get the adjusted time of arrival
 
 -     //  dwt_readfromdevice(RX_TIME_ID, 9, RX_TIME_RX_STAMP_LEN, timestamp) ; // Get the adjusted time of arrival
 
 - }
 
 
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