SYNCHRONIZATION OF RECEIVER UNITS OVER A CONTROL AREA NETWORK BUS
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Abstract
In a logging system (100), multiple receiver units (106) are synchronized over a control area network (CAN) bus (110) without use of separate differential lines. A ready for synchronization command is received over the CAN bus (110). In response to receiving the ready for synchronization command, a start synchronization interrupt is enabled. A start synchronization command is then received over the CAN bus (110). In response to receiving the start synchronization command, the start synchronization interrupt is triggered for capturing formation signals which are produced responsive to excitation signals from a transmitter unit (104).
30 Citations
46 Claims
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1-23. -23. (canceled)
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24. A method of synchronizing a plurality of receiver units over a control area network (CAN) bus, the method comprising:
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receiving, over the CAN bus, a ready for synchronization command; enabling a start synchronization interrupt in response to receiving the ready for synchronization command; receiving, over the CAN bus, a start synchronization command; and in response to receiving the start synchronization command, triggering the start synchronization interrupt for capturing a formation signal. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A receiver unit, comprising:
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a central processing unit (CPU); memory coupled to the CPU; and a control area network (CAN) bus interface coupled to the CPU, wherein the CPU is programmed with instructions, stored in the memory, to; receive, via the CAN bus interface, a ready for synchronization command; enable a start synchronization interrupt in response to receiving the ready for synchronization command; and receive, via the CAN bus interface, a start synchronization command; and wherein the start synchronization interrupt is enabled to trigger in response to receiving the start synchronization command for use in capturing a formation signal. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A logging system, comprising:
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a master control unit; a plurality of receiver units coupled to each other and to the master control unit over a control area network (CAN) bus; and a transmitter unit coupled to the master control unit, the transmitter unit being configured to transmit excitation signals to a formation, wherein each receiver unit is configured to; receive, from the master control unit over the CAN bus, a ready for synchronization command; enable a start synchronization interrupt in response to receiving the ready for synchronization command; receive, from the master control unit over the CAN bus, a start synchronization command; and in response to receiving the start synchronization command, trigger the start synchronization interrupt for capturing formation signals which are produced responsive to the excitation signals from the transmitter unit. - View Dependent Claims (39, 40, 41, 42)
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43. A method for use by a master control unit for synchronizing a plurality of receiver units over a control area network (CAN) bus, the method comprising:
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transmitting, over the CAN bus to a receiver unit, a ready for synchronization command; transmitting, over the CAN bus to the receiver unit, a start synchronization command following the ready for synchronization command; and in response to the start synchronization command, enabling excitation signals from a transmitter unit for the receiver unit to start capturing a formation signal. - View Dependent Claims (44, 45, 46)
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Specification