mbedmicro/mbed — pull request #633 by toyowata (2014-11-02 05:12:40+00:00)
Title: [LPC1549] Fix serial interrupt issues

* Fix USART2 base address offset
* Fix issue by handling interrupt type (TxIqr and RxIrq)
* ISR now correctly refers INTSTAT instead of STAT to get interrupt
cause
* Disable interupt when update vector table
* Tested by issue #616 test cases and serial_interrupt test