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hello,
I am quite a beginner in DSP programming. I am
working with a DSK31 kit. I need to acquire analog signal thru the ADC. The
signal is a continious waveform of this shape :
-----||||||||------|||||||-------||||||||------||||||------||---
I use line XF0 to drive the external
device that send me the signal, this way :
____|-----|___|-----|___|-----|___|-----|___|--|_
I have to acquire the data in the gap between
each "packet". Using the examples provided by TI (dsk_osc, dsk_scan) I managed
to do it but too slowly because the host trigger the acquisition and I cannot
make a loop shorter than 1000ms. And I need to read the packet of data every 1ms
! I would like to know :
How to program the DSP (in asm) to be abble to
drive the line XF0 and to read data alternatively, and continiously and in
the same loop send the data to the host when it asks for it and send a digital
word thru the parallel port to the device to command the processing of the
next packet. Each packet is about 20 to 200microsec long.
Thank you if you can help me.
Robin Barthes
The host is a PC Windows with BorlandC/C++
compiler. |
How to control data acquisition timing from host ?
Started by ●January 11, 2001
