In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Capt. Quirk wrote:

JonnyMac,
 

That's right, I am using my PDB. I've had the magazine since late April and I have read the artical many times. You referred to #117 "Timming is everything" artical as to when you used that UART before and you have recomended it, to me before to read up on the appmod protocol. 

 

In the artical you mention it could be ran by a BS2, and so I was trying to duplicate that idea. I didn't understand the need for the transmiting uart, so I left that code in place and ran a single wire to the RX uart. The Serial LCD example used it also and my wire connections were wired to those specs. A 220 resistor and a 4.7K pullup resistor between the stamp and SX. 

 

The part that I understand the least is what the BS2 SEROUT line should look like and what the Control packet is. I am also under the impression that the first 2 byte periods are just time, instead of 2 packets with no data inside them?. Also is the 4.7K pullup to weak?, I might have fried the BS2 last night. lol.

 

Bill

 

PS, thanks for publishing this project in Nuts n Volts. I thought it was going to be part of the book.TY

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