milestone3 Entity Reference

Milestone 3. More...

Collaboration diagram for milestone3:

Libraries
ieee
	Use Standard Library.

Use Clauses
STD_LOGIC_1164
	Use Logic Elements.

Generics
divider	integer := 125000
	Prescaler for PWM-signal.

Ports
CLOCK_50_B5B	in STD_LOGIC
	component clock
CPU_RESET_n	in STD_LOGIC
	resets the component
SW	in STD_LOGIC_VECTOR ( 9 DOWNTO0 )
	switch input
KEY	in STD_LOGIC_VECTOR ( 3 DOWNTO0 )
	key input
HSMC_RX_P	out STD_LOGIC_VECTOR ( 16 DOWNTO0 )
	Motor_pwm1( bit 0 ) and Motor_pwm2( bit 1 )
HSMC_RX_N	out STD_LOGIC_VECTOR ( 16 DOWNTO0 )
	Motor_pwm3( bit 0 ) and Motor_pwm4( bit 1 )
HSMC_TX_N	out STD_LOGIC_VECTOR ( 16 DOWNTO0 )
	Motor_en_a( bit 2 )
HSMC_TX_P	out STD_LOGIC_VECTOR ( 16 DOWNTO0 )
	Motor_en_b( bit 3 )
LEDG	out STD_LOGIC_VECTOR ( 7 DOWNTO0 )
	green leds
LEDR	out STD_LOGIC_VECTOR ( 7 DOWNTO0 )
	red leds

Detailed Description

Milestone 3.

Definition at line 35 of file milestone3.vhd.

Member Data Documentation

divider integer := 125000

Generic

Prescaler for PWM-signal.

For this purpose 2,5 ms are used as minimal pulse-width.

The prescaler is calculated with the given and desired frequency via the following formula:

\begin{equation*} \text{prescaler} = \frac{f_{\text{clock}} \text{Hz}}{f_{\text{prescaler}} \text{Hz}} \end{equation*}

e.g.:

\begin{equation*} \left.\begin{aligned} f_{\text{prescaler}} &= \frac{5}{2}\,\text{ms} \newline &= 400\,\text{Hz} \newline\newline \text{prescaler} &= \frac{50\,\text{Mhz}}{400\,\text{Hz}} \newline &= 125000 \newline \end{aligned} \right\} \qquad \text{pulse-width: 2.5 ms} \end{equation*}

For simulation-purpose the divider was set to 125 for faster wave generation.

Definition at line 58 of file milestone3.vhd.

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The documentation for this class was generated from the following file:

• milestone3.vhd