hello guys

i need some help to control a digital potentiometer using the USART in
TelosB in its SPI mode. i'm using tinyos 2.x. i wanna connect my digi-pot to
the U2 (10 pin) extension.

i have noticed USART0 and USART1, and their respective pins on the msp430
microprocessor. but i haven't found any example codes for this. i'd be
grateful for some help on

1. how USART-SPI mode works
2. some example codes of a similar application

thx

mailo
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