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Dear all:
I am using tmote and writing a program to sample vibration
data from 3 channels (for x, y, z axises).
My purpose is to sample the data for over 200 Hz for at least
10 seconeds.
Thus, I applied the DMA module to speed up the data transfer
from ADC registers to RAM.
Is it possible to sample three axies in the same
time?
If I used 3 DMA interfaces and bind 3 ADC12Single
/* example */
interface MSP430DMA as DMA0;
interface MSP430DMA as DMA1;
interface MSP430DMA as DMA2;
interface MSP430ADC12Single as ADC0;
interface MSP430ADC12Single as ADC2;
interface MSP430ADC12Single as ADC2;
/* end of example */
Problems is "The data from the three
channels are not synchronous!!"
How to synchronize these sampling data??
Is there any possible way to do that??
Many thanks, Steve
Chiang. |
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