explanation of VHDL Codes

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brunokasimin

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hello everyone,

constant maxAddrBitIncIO : integer := 27;

constant maxAddrBitBRAM : integer := 16;



-- start byte address of stack.

-- point to top of RAM - 2*words
constant spStart : std_logic_vector(maxAddrBitIncIO downto 0) :=
conv_std_logic_vector((2**(maxAddrBitBRAM+1))-8, maxAddrBitIncIO+1);

What does this "conv_std_logic_vector((2**(maxAddrBitBRAM+1))-8, maxAddrBitIncIO+1);" tell us?


thx in advanced
 

conv_std_logic_vector function converts its first argument to the std_logic_vector type with the size of the 2nd argument.
 
no, this is exponential, and left side of the ** can be integer or floating point, but right side must be integer only. i recommend u download some VHDL book. good luck
 

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