Atmel AVR4016
6.5 Self test
Sensor devices often provide a self-test feature to provide a physical and/or electrical
test of the sensor’s operation. These tests are generally very device specific, as is the
interpretation of the results.
The sensor_selftest() function provides a mechanism for invoking a sensor’s self-
test functions from your application. The function return value indicates the summary
Pass or Fail result from the device test, along with a specific code indicating the
failure type (if any).
The sensor_selftest() function also allows data values from the self test to be
passed back to the caller in a generic manner – the specific returned data are specific
to the device and its driver.
See the individual driver descriptions in Chapter 9 , page 27 for more information on
available self tests.
13
8367B-AVR-06/11
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