Ring laser angular rate sensors, also called laser gyros, are well known in the art. This patent relates to a method of testing a laser gyro and more particularly to a method of testing a laser gyro that provides both self testing capabilities and self diagnostics. 07/922,612, which is commonly owned with the present application. (h) returning to accept a new command in step (a). (g) interpreting the command in the FIFO and (e) check the command tag for status valid flag, if the command tag is not valid the process returns to wait for the laser gyro to respond in step (d)
#4 BIT MODULAR PARALLEL TO SERIAL CONVERTER FULL#
(d) wait for the laser gyro to respond by checking whether the FIFO is full, if the FIFO is full process the next step, if it is not wait for it to fill (c) transmitting the next BYTE of the test command and if it is the last BYTE of the test command then executing the following steps if it is not then returning to step (b) (b) checking if the UART transmit buffer is empty and if it is empty executing the next steps, if it is not, waiting for it to fill
(a) sending a first BYTE a test command to the gyro
A high speed test interface method for a laser gyro system which includes a universal asynchronous receiver transmitter (UART) the method having a transmit buffer an further including a first-in-first-out (FIFO) register comprising the steps of: The apparatus of claim 1 where the microprocessor has a built in test equipment status register comprising a plurality of bits including a first bit which indicates if the dither drive is operating within a predetermined dither drive range, a second bit which indicates if the readout counter is operating within a predetermined counter range, a third bit which indicates if the laser drive current is operating within a predetermined current range, a fourth bit which indicates if the laser drive current of leg 2 is operating within a predetermined current range, a fifth bit which indicates if a high limit temperature sensor is operating within a predetermined high temperature range, and a sixth bit which indicated if a low limit temperature sensor is operating within predetermined low temperature range, and one of which indicates a missing sample strobe.Ħ. (c) checking whether the command buffer is full if it is not and if it is executing the following steps ĥ. (b) setting the command buffer full flag to high to indicate that the command buffer is full (a) loading a command buffer with a command in an external system controlling the laser gyro A method of communicating self test data in a laser gyro comprising the steps of: The laser gyro self test apparatus of claim 1 wherein data is sent from the UART to the serial to parallel converter in a UART input frame comprising:Ĥ. The laser gyro self test apparatus of claim 1 wherein data is sent from the UART to the serial to parallel converter in a UART output frame comprising:ģ. (h) a parallel to serial converter connected to the interface logic and the receive line to convert parallel data from the interface logic to serial data for communication to the UART.Ģ. (g) an interface logic unit connected to the output of the FIFO register means connected to the external system to receive commands from the external system and (f) a first in first out (FIFO) register means connected to the parallel output having an interface output (e) a serial to parallel converter connected to the transmit line to convert serial data on the transmit line to parallel data having a parallel output (d) a microprocessor controller external system (c) a receive line connected to the UART (b) a transmit line connected to the UART (a) a laser gyro controller comprising a microprocessor with a high speed universal asynchronous receiver transmitter (UART) and a peripheral transaction system controlling the UART the laser gyro controller for monitoring the laser gyro A laser gyro self test apparatus comprising:
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