Hello! I am trying to configure the FlexIO as UART with baudrate less than 115200 in a FRDM-KL43Z, but I can´t do it.
I am using the SDK example called: flexio_uart_interrupt_transfer.c , for MCUXpresso IDE.
I was reading some posts that it is needed to decrease the Clock Frequency to make the divider less than 0xFF to use it in the TIMER_CMP.
As my clock frequency is 48MHz, and my baudrate less than 115200, the timer value is bigger than 0xFF; the code implemented uses this:
timerDiv = srcClock_Hz / userConfig->baudRate_Bps;
timerDiv = timerDiv / 2 - 1;
if (timerDiv > 0xFFU)
result = kStatus_InvalidArgument;
So, as timerDiv is bigger than 0xFF, it returns invalid argument.
How can I configure the clocks and the flexio to work with baudrates lower than 115200 bps?