4.11 CLASSB_FPU_RegistersTest

CLASSB_TEST_STATUS CLASSB_FPU_RegistersTest(bool running_context);

This self-test checks the FPU registers of the CPU, to detect stuck-at faults.

This self-test writes test patterns into the FPU registers, and read them back to detect stuck-at faults. Special function register bits which are reserved or should not be modified during the test, are not written. Testing FPU registers is optional as it may not be used in every application.

None.

running_context - False for startup test. True for run-time test.

CLASSB_TEST_STATUS - Status of the test.

CLASSB_TEST_STATUS classb_test_status = CLASSB_TEST_NOT_EXECUTED;
// Perform run-time test of the FPU registers
classb_test_status = CLASSB_FPU_RegistersTest(true);

This self-test can be used during startup as well as run-time. If a failure is detected, this self-test remains in an infinite loop to avoid unsafe code execution.