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How to create files for RAM?

Thread Summary

The user is struggling with creating a suitable set of data for the AD9910 RAM, specifically how to format frequency values. The final answer suggests providing more details on the intended use to better assist. Accompanying answers clarify that the data should be in a 32-bit binary format, with an example of calculating the Frequency Tuning Word (FTW) for a 20 MHz frequency sweep using a 500 MHz SYSCLK.
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Hello,

having just started using AD9910 board, I got stucked with RAM usage. I know how to load/retrieve data from RAM - the problem is, I do not understand how to create a suitable set of data. Having read the datasheet, technical tutorial, user guide and searched on the Internet, I made only little progress.

From the data sheet (p. 33/60, Table 12) I know the required structure of each word and how many bits are assigned to each parameter for each type of entry. However, I have no idea what to put into those bits. The first thing that came to my mind - to load the required values of, for example, frequency - does not seem to be right, especially after having a look at several example files posted on this forum.

Therefore I would like to ask you, how can I create files for AD 9910 RAM - what are the general rules, if there is any software required etc.

I am especially interested in a way how to get data from Excel/Calc and txt files into a format suitable for the RAM.

Thank you very much in advance.

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