Hi Fleenor, Below are sine wave signal generated at different frequency using DAC. I am using DMA & Timer to periodically trigger DMA unit to move sample data points from the lookup table stored in memory to DAC output 1. Trigger is set at 1MHz. 100 sample points in lookup table.Generated sine wave frequency 10KHz 40 sample points in lookup table.Generated sine wave frequency 25KHz 20 sample points in lookup table.Generated sine wave frequency 50KHz 10 sample points in lookup table.Generated sine wave frequency 100KHz My questions are- 1 ) Plot of sine wave till 100KHz looks ok to me. what your comment on these plot ? 2) How can i increase frequency of trigger from Timer, because i can only assign minimum tick period of 1usec (which generate trigger at 1MHz) ? 3) Is there a way to assign tick period value in nano-second through SysConfig ? 4) Will adding any low pass filter affect the sine wave generated ?
↧