Hi,
I bought the Sparkfun Clock 5P49V60 card a month ago and after playing with it for a month I found a couple of issues in the library :
-When writing the integer part of the divider's register there is an error, you're only shifting the most significant bits by 3 and not 4. This causes the divider number to not be 100 but 196 for most of your examples. It's actually a lucky mistake because the VCO doesn't work at 1600 MHz apparently (btw it would be nice to have the working frequency band of the VCO, I couldn't find it anywhere on the Sparkfun website)
-In a lot of function you are using a 8 bits integer to code a 12 bits integer.
-When setting the fractional part of the frequency output divider you forgot to shift the 6 least significant bits by two.
-In example 2, you're modifying two times clock one.
Best,
Michael
Hi,
I bought the Sparkfun Clock 5P49V60 card a month ago and after playing with it for a month I found a couple of issues in the library :
-When writing the integer part of the divider's register there is an error, you're only shifting the most significant bits by 3 and not 4. This causes the divider number to not be 100 but 196 for most of your examples. It's actually a lucky mistake because the VCO doesn't work at 1600 MHz apparently (btw it would be nice to have the working frequency band of the VCO, I couldn't find it anywhere on the Sparkfun website)
-In a lot of function you are using a 8 bits integer to code a 12 bits integer.
-When setting the fractional part of the frequency output divider you forgot to shift the 6 least significant bits by two.
-In example 2, you're modifying two times clock one.
Best,
Michael