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Serial interrupt losing character (overrun error) due to MQX bookkeeping taking too long? sometime the serial ISR spent up to 6.8ms to complete. Any one has exeperienced this issue?

Question asked by TIM NGUYEN on Aug 21, 2014
Latest reply on Aug 21, 2014 by Robert Lewis

is there _int_disable() somewhere in MQX that preempting the serial ISR to complete in timely manner?