Hello all, I have a few things uncertain about USART on TelosB.
1) This may be naive, but I'm really curious why USART is needed in the first place. Why can't the CPU talk to, say, CC2420 directly since they are wired together<http://webs.cs.berkeley.edu/tos/hardware/telos/telos-revb-2004-09-27.pdf> ? 2) What components/devices/peripherals are communicating with CPU via USART? Via which one (USART0 or USART1) and in which mode (UART, SPI, or I2C)? 3) Can USART0 and USART1 be used in parallel? For instance, can a strobe be sent to CC2420 using USART0 while the RSSI register on CC2420 is being read using USART1? Your explanation will be highly appreciated. -Xiaohui Liu
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