Hi,
I need to program an old 8051 board with an AT89C51CC03. I like to write my own interrupt driven serial port (UART) function without using some library function like printf() or putchar().
I get timer1 running and generating interrupts. I get the uart running and generating interrupts. But...
...one thing I don't understand: - on the one hand timer1 can be programmed somehow as a baudrate generator for the serial port? (how?) - on the other hand, the uart has it's own FUart Clock signal derived directly from XTal
I do not see where the connection lays between timer1 as a baudrate generator and the uart transceiver speed...
I searched through the uC datasheet many times and read many Internet articles but still did not found the answer.
Hope someone can help me out.