F28M35M52C: How to read more than 8 bytes from UART?

I am trying to read strings of variable length into an array for processing.

The FIFO in the F28M35 is 16x8 but I can not read more than 8 bytes into the array. See attached modified example code (from ControlSuite) I have been playing around with below.

If I send 8 or less bytes the UART functions work fine. However, when sending more than 8 or, even more than 16, I can get to the end of the string but the array is overwritten. I only get the last 8 bytes.

I have inserted an interrupt counter which showed I get an interrupt every 8 bytes worth of data. So it seems the "UARTCharsAvail" function jumps out of the loop at 8 bytes even when more than 8 bytes is sent to the UART.

How do I make the UART read continuously (more than 8 bytes at a time), realize the data string is finished (store the array), and then wait for the next set ?

//*****************************************************************************

// The UART interrupt handler.

//*****************************************************************************

void

UARTIntHandler(void)

{

unsigned long ulStatus;

// IntDisable(INT_UART0);

f=0;

// Loop while there are characters in the receive FIFO.

while(UARTCharsAvail(UART0_BASE))

{

// Read the next character from the UART and write it back to the UART.

// 2018-01-17 Function changed to store character in "data1uart0" for examination.

//data1uart1 = UARTCharGetNonBlocking(UART0_BASE);

//for (i=0; i<8; i++)

MB_Rbuf[f] = (unsigned char) UARTCharGetNonBlocking(UART0_BASE);

f++;

}

bufnow=f;

// Get the interrupt status.

ulStatus = UARTIntStatus(UART0_BASE, true);

// Clear the asserted interrupts.

UARTIntClear(UART0_BASE, ulStatus);

UARTintCnt++;

// IntEnable(INT_UART0);

}

Thanks,

Mark C.