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Altera_Forum
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12 years ago

constant manipulation in VHDL statement

Hi, I am puzzled by the result of a VHDL code and hope someone could help understand the problem. ...... constant PERIOD : integer := 1000; constant A : integer := 4; constan...
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Altera_Forum
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12 years ago

VSYNC_LOW and V_BACK_PORCH are respectively defined as 4 * HSYNC_PERIOD and 23 * HSYNC_PERIOD, so (1056 * (4+23)) and (HSYNC_PERIOD * (VSYNC_LOW+V_BACK_PORCH)) are far from equal. I assume you meant just (VSYNC_LOW+V_BACK_PORCH) as a comparison value.