My idea of look-up table algorithm is this: one, construction of two-dimensional array of N months (N = you need to enter the median value of maximum frequency, for example, you need accurate to 10HZ, the highest 30MHZ, then there is 10M bit, 1M bit, 100K-bit, 10K-bit, 1K-bit, 100HZ-bit, 10HZ, and a total of 7, so N = 7). 2, based on your use of the chip model, and the crystal frequency, calculated for each frequency control digital word at the time 0-9. 3, when used, you control the frequency of every word, look-up table read out, and the sum of (the special needs of attention also needs to deal with binary). 4, the increase of the 4-byte control word sent to DDS.

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AD9833

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