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Greetings: I have recently found a very unusual problem that to the best of my knowledge appears to be in the 807 hardware. I'm hoping the gurus on this list might provide some input. I have a situation where I am servicing an interrupt, and I'm allowing a higher priority timer interrupt to preempt me. If I try to disable the timer interrupt (using a BFCLR instruction), right before the timer interrupt occurs, it appears like the processor vectors off somewhere other than the normal interrupt handler. Specifically in my case, it appears to jump to the reset vector (but without performing a reset). If I suspend interrupts before and after the BFCLR instruction I never have a problem. Has anyone on this list ever witnessed any similar behavior? I'm not interested in any work-around -- just confirmation that this problem exists. Regards, William C. Yochum Microwave Data Systems Inc. Principal Eng./Software 175 Science Parkway Phone: (585) 242-8319 Rochester, NY 14620 FAX: (585) 241-5590 USA |
Strange DSP56F807 problem
Started by ●January 17, 2003
