Vhdl Binary To Integer Converter Mp3
Integer To Binary Converter
I need to convert an integer to a binary representation, but I don't know the value of the integer. What should I do?
Oct 19, 2011 Dear friends. I have problem with fixed point in VHDL, How to display binary fraction into LCD in decimal value? Example: 1001.10002 = 9.5 decimal 10012 = 9 and.10002 =.5 but 10002 in decimal value is = 8. If I make an encoder for this fraction value it must require very many resource in my FPGA. I use Spartan 3E board. It took me an hour to convert a GCD C program over to Viva. And it will now run on an arbitrary bit length. You can't do that in C without a week of labor. Quote: > Hi all VHDL experts, > Is there any tools which can convert a C C++ source file to VHDL. For > example If I have a C source code for a MP3.
This lab may be skipped if students are already familiar with VHDL programming. The hybrid programming approach is then presented in Chapter 4 using the LabVIEW FPGA Module and NI IP Integration Node. Lab 4 in this chapter includes examples of hybrid codes. In Chapter 5, fixed-point and floating-point number.
Martin Zabel1 Answer
Your declaration of the signal conv_int is invalid. At first, you cannot use conv_int in the subtype indication on the right side because conv_int is not yet defined. You can use other signals (or objects), e.g. Distance, which are declared before. And will you have to specify a range with to or downto and not just the length of the std_logic_vector, e.g.:
But this will not work either, because now the range is not constrained during elaboration because timeIn is not a constant. That means, you have to specify the range of the array type std_logic_vector at 'compile' time.
It would make sense here to have the same range for conv_int as for Distance because you assign conv_int to Distance later on. This declaration will be valid:
With this change, your code will analyze and elaborate (compile / synthesize). Now your integer to 'binary' conversion at this line
will work as follows: The integer expression timeIn*340/2 will be evaluated at simulation time / at run-time, then converted to unsigned while truncating the binary representation to conv_int'length bits, and finally converting this to std_logic_vector. Be aware that for timeIn values greater than floor(2**16/170) = 101, the truncation will / may lead to an unexpected Distance.
The code can be further improved:
Vhdl Binary To Integer Converter Mp3 Free
You should avoid the non-standard Synopsys package
std_logic_unsigned. Please use the standard IEEE packagenumeric_stdonly.You process will be equivalent to the one-liner
conv_int <= ...written as an concurrent statement. Because variants will be executed whentimeInchanges (and once after startup).You don't need an intermediate signal here, if
conv_intis only assigned to the outputDistance.The multiplication by 340/2 will be equivalent to the multiplication by 170, as long as
timeInis smaller than 2**31/170. This would be the case due to the above requirements regarding truncation.
Thus, your architecture can be reduced to:
Martin ZabelMartin Zabel