Display

- Cornelius Kleiner and Christian Kern - 22 Jul 2008

description

The entity has 4 inputs and 3 outputs.

Input	Bits	Function	Output	Bits	Funktion
CLPD_CLK	1	Clock	DISP_A_d	2	Adress Output
CHOOSE	1	Choose between displaying a predefined output and a 16 bit hexadecimal number	DISP_D_d	8	Data output
ENTRY_IN	4	Choose predefined output	DISP_WR_d	1	Write Signal Output
ENTRY_SAVE_IN	16	Hexadecimal number

To choose between several predefined outputs by setting ENTRY_IN, set CHOOSE to 1. Predefined outputs:

value	displayed word
0000	BUSY
0001	LVL1
0010	LVL2
0011	ERROR
0100	CALIBRATE

More predefined outputs can eventually be added.

To display your own 16bit hexadecimal number, set CHOOSE to 0 and put your number to ENTRY_SAVE_IN.

Pin names of the outputs

DISP_A<0>	LOC = "M2"
DISP_A<1>	LOC = "L5"
DISP_D<0>	LOC = "M3"
DISP_D<1>	LOC = "M4"
DISP_D<2>	LOC = "N2"
DISP_D<3>	LOC = "N3"
DISP_D<4>	LOC = "P1"
DISP_D<5>	LOC = "R1"
DISP_D<6>	LOC = "T1"
DISP_WR	LOC = "L2"

code

• display_ctrl.vhd: display VHDL source code

Event Counter

description

The entity has 3 inputs and 1 output.

Input	Bits	Function	Output	Bits	Funktion
CLPD_CLK	1	Clock	ENTRY_SAVE_OUT	16	Display Output
ENABLE_COUNTER_IN	1	Enable counter
RESET_COUNTER_IN	1	Reset counter

To count an event set ENABLE_COUNTER_IN to '1' for 10ns. To reset the counter set RESET_COUNTER_IN to '1'.

To display the number of events put ENTRY_SAVE_OUT to ENTRY_SAVE_IN of display_ctrl and set CHOOSE to '0'.

code

• event_counter.vhd: event counter VHDL source code

top entity gp_add_on

• gp_add_on.vhd: gp_add_on VHDL source code