Using a ATTiny2313A, 1602 LCD, and a PC via serial port. I would like to make a c code to recieve a single character from the serial port and display it on the first line of the LCD on the left most side. However I have some constraints can you please help. I must use an interrupt to detect the completion of the the UART RX transfer. The baud rate must be 9600 bps and have an error of less than 1%. I cannot use LCD library or the UART Library and must code from register. The LCD has an 8 bit interfact and the data format is 8bits with no parity checking but has 1 stop bit.