JP2006331086A5

JP2006331086A5 -

Info

Publication number: JP2006331086A5
Application number: JP2005153877A
Authority: JP
Filing date: 2005-05-26
Publication date: 2008-04-17

Claims

In a memory diagnosis method for diagnosing a failure or abnormality of a memory serving as a work area of a CPU, a plurality of registers for diagnosis processing are prepared, and the data of the register to which the contents of the memory are transferred are subjected to bit inversion operation to test data The memory diagnosis method is characterized in that after the test data is transferred between the memory and the register to each other, a failure or an abnormality of the memory is diagnosed by a match or mismatch of the contents of the plurality of registers.

A memory diagnostic method for diagnosing a failure or abnormality in a memory serving as a work area of a CPU, comprising first to third registers for diagnostic processing, transferring the contents of the memory to the first register, and 1 register data is bit-inverted and set in the second register, the second register data is transferred to the memory, the memory data is further transferred to the third register, the second register and A memory diagnostic method comprising: comparing and determining the contents of a third register, and determining a failure of the memory if they do not match.

If they match in the comparison determination 1, the data of the first register is written to the memory, the data of the memory is further transferred to the third register, and the contents of the third register and the first register are compared and determined. 3. The memory diagnosis method according to claim 2, wherein a failure of the memory is determined when there is a mismatch.

The memory diagnosis method according to claim 3, wherein when the comparison / determination 2 coincides, the state is returned as normal.

A memory diagnostic method for diagnosing a failure or abnormality of a memory serving as a work area of a CPU, comprising a first register and a second register for diagnostic processing, transferring the contents of the memory to the first register, and 1 register data is bit-inverted and set in the second register, the second register data is transferred to the memory, the memory data is further transferred to the first register, the first register and A memory diagnosis method comprising: comparing and determining the contents of the second register, and determining failure of the memory if they do not match.

If they match in the comparison determination 1, the data in the second register is inverted and stored in the first register, the data in the first register is written to the memory, and the data in the memory is further stored in the second register. The memory diagnosis method according to claim 5, wherein the memory diagnosis method transfers to a register, compares and determines the contents of the first register and the second register, and determines a failure of the memory when there is a mismatch.

The memory diagnosis method according to claim 6, wherein when the comparison / determination 2 matches, the memory is returned as normal.

A memory serving as a work area for the CPU; a current command value is calculated based on a steering torque value and a vehicle speed by cooperation of the CPU and the memory; and a steering assist force is applied to the steering mechanism based on the current command value In a control device for an electric power steering device adapted to control a motor, the control device has a plurality of registers for diagnosis processing, and performs bit inversion operation on the data of the register transferred with the contents of the memory to obtain test data. And a diagnostic function for diagnosing a failure or abnormality of the memory by matching or mismatching of the contents of the plurality of registers after generating and transferring the test data between the memory and the register. Control device for electric power steering device.

The plurality of registers are a first register to a third register, and the diagnosis function transfers the contents of the memory to the first register, performs bit inversion operation on the data of the first register, and stores the data in the second register. Set, transfer the data in the second register to the memory, further transfer the data in the memory to the third register, compare and determine the contents of the second register and the third register, and if they do not match The control device for the electric power steering apparatus according to claim 8, wherein the memory is determined to be faulty.

If they match in the comparison determination 1, the data in the first register is written to the memory, the data in the memory is further transferred to the third register, and the contents of the third register and the first register are compared and determined. 10. The control device for an electric power steering apparatus according to claim 9, wherein a failure of the memory is determined when there is a mismatch.

The plurality of registers are a first register and a second register, and the diagnosis function transfers the contents of the memory to the first register, performs bit inversion operation on the data in the first register, and stores the data in the second register. When the data of the second register is transferred to the memory, the data of the memory is further transferred to the first register, the contents of the first register and the second register are compared and judged 1, and there is a mismatch 9. The control device for an electric power steering apparatus according to claim 8, wherein a failure of the memory is determined.

If they match in the comparison determination 1, the data in the second register is inverted and stored in the first register, the data in the first register is written to the memory, and the data in the memory is further stored in the second register. 12. The control of the electric power steering apparatus according to claim 11, wherein the contents of the first register and the second register are transferred to a register, and the contents of the first register and the second register are compared and determined, and if there is a mismatch, the failure of the memory is determined. apparatus.