I'm having a little trouble trying to get my 16550 to Receive Characters. I can get it to transmit Bytes, but it will not receive bytes.
My Initialization Routine is as follows: LCR=0x80; // Set Baud Rate Divisor Latch to 1 DLM=0x00; // Set Baud Rate divider DLL=0x1b; LCR=0x03; // Set Divisor Latch to 1 and 8bit word length MCR=0x00; FCR=0x07; //Enable FIFOs and Reset the RX & TX FIFO. Set FIFO trigger level to 1 byte IER=0x0F; // Enable all Interrupts
THR=0x30; // This transmits "0" ASCII character
when I read the RBR register I always get 0x00 when I know I sent characters to the port.
Any thoughts would be helpful.