Trying to build a 'rock solid' uart Interrupt service routine ('UART_IRQHandler()') for LPC1343.
Should be able to synchronize to a running serial stream which has data packets separated by 100 msec gaps between them.
Some sentences in Manual UM10375 are not clear enough for me.
Uart IIR on page188: "The UART RLS Interrupt...is set whenever any one of four error conditions occur..."
Referenced are OE, PE, FE and BI. What about RXFE? When RXFE will be set?
PE in U0LSR on page 194: "Time of parity error detection is dependent of U0FCR: What does that mean?
Will I get PE when error char is loaded from RSR into FIFO? Or will I get PE if I read a char from the FIFO?
FE description is - at first sight - more exact: "A framing error is associated with the character at the top of the UART RBR FIFO". If FIFO is enabled, do we then have an 'array RBR'?
Maybe one has solved such and may provide hints for handling LPC1343 in ISR?
Best regrards Juergen