diff --git a/LAB3/src/digilent_jstk2.vhd b/LAB3/src/digilent_jstk2.vhd index 418ac61..40268a8 100644 --- a/LAB3/src/digilent_jstk2.vhd +++ b/LAB3/src/digilent_jstk2.vhd @@ -43,10 +43,8 @@ ARCHITECTURE Behavioral OF digilent_jstk2 IS CONSTANT CMDSETLEDRGB : STD_LOGIC_VECTOR(7 DOWNTO 0) := x"84"; -- Calculate delay in clock cycles: (delay_period + 1_SPI_clock_period) * clock_frequency - -- Uses integer arithmetic optimized to avoid truncation by performing multiplications before divisions - -- Formula: ((DELAY_US * SPI_SCLKFREQ + 1_000_000) * CLKFREQ) / (SPI_SCLKFREQ * 1_000_000) -- This ensures proper timing between SPI packets as required by JSTK2 datasheet - CONSTANT DELAY_CLK_CYCLES : INTEGER := ((DELAY_US * SPI_SCLKFREQ + 1_000_000) * CLKFREQ) / (SPI_SCLKFREQ * 1_000_000) + 1; + CONSTANT DELAY_CLK_CYCLES : INTEGER := (DELAY_US + 1_000_000 / SPI_SCLKFREQ) * (CLKFREQ / 1_000_000); -- State machine type definitions TYPE tx_state_type IS (DELAY, SEND_CMD, SEND_RED, SEND_GREEN, SEND_BLUE, SEND_DUMMY);