Hello,

I am trying to write code to use the UART0 serial communication port with the C8051F040 and I am having trouble with the ISR with the UART0. This is the ISR I have right now (from someone else) but I do not have any documentation from ANYwhere saying whether this is the way to write the ISR:

void commsISR (void) interrupt 4
{
TI0 = 0; // reset transmit interrupt flag
//code to respond to ISR
}

As far as I can tell in my debugging, my code is not going into my ISR at all.