Does anybody know how build and read an input buffer for a Basic Stamp ?

Question

Let's say that you are going to use serial communications between a PC and the basic stamp. Without holding the stamp in a recieve mode waiting for data, how can the PC write to a buffer for the Basic Stamp to read in when it is ready.

Answer 1

You can try to interface a UART to the stamp via I2C. See link part is available from digikey @ $2.80 ea

Answer 2

Not too familiar with a Basic Stamp, but, check to see if the I/O port can be tied to an interrupt. If it can be, then your stamp will do whatever processes you programmed it for, and will only respond to serial communications if an interrupt occurs. You will have to write an interrupt handler routine to handle the serial communications once the interrupt occurs.