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Showing results for tags 'ham radio'.
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Change Frequency to SI570 DXO on I2C. (not fully fonctionnal).
f4dtr posted a topic in Energia - MSP
Hi all ! On another thread (cheat sheet thread), I have explain I use launchpad for driving a SI570. some of you have need I share my work. it's ok... ;-) look attachment file. For understand my work, i preconise to read the datasheet. The SI570 have 2 mode for change frequency, i use the "long" mode. I recalc all parameters in every change frequency. But i simplify the calcul by the systematic use of initial frequency in place of read all registers for determinize actual ferquency to recalc new freq. (I think attiny/softrock already uses this trick.) but, I have 2 problems (in Fxtal -
Hi, This will ring a bell to radioamateurs (HAM radio) but other may just ignore... I have posted to my blog a code for a simple VFO (Variable Frequency Oscillator) or better said an RF frequency generator using an AD9850 DDS chip. This code is simple and has no special trick but might give you inspiration. http://xv4y.radioclub.asia/2013/03/19/code-source-vfo-avec-dds-ad9850ad9851-et-launchpad-msp430/ The pins are "wired" for my WSPR agile beacon generator kit, but everything can be changed to your taste or needs. The text of the blog article is in french but has no additional
