Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
17255 Discussions

Keyboard num lock scan code problem.

Altera_Forum
Honored Contributor II
1,255 Views

Hi, Ive got a problem with implement the scan codes for the case which num lock is on. i would like to use keypad 1-9 number on the keyboard as numbers, not as arrows, pg dn, pg up, etc.. the scan codes shown in easy scan.bmp shown below, i can easily implement. for example using the following process below because the scan codes are 8 bits long as shown here (example) https://www.alteraforum.com/forum/attachment.php?attachmentid=2161  

 

------------------------------------------------------------------ 

PROCESS (scan_code, ready_set) 

 

BEGIN 

IF (ready_set = '1') THEN 

CASE scan_code IS 

 

 

WHEN "00011100" => -- A 

temp1 <="00011100"; 

data1 <= "1111001"; 

data0 <= "1000000";  

 

 

WHEN "00110010" => -- B 

temp1 <="00110010"; 

data1 <= "0100100"; 

data0 <= "1000000";  

 

 

WHEN "00100001" => -- C 

temp1 <="00100001"; 

data1 <= "0110000"; 

data0 <= "1000000"; 

 

 

WHEN "11110000" => -- break code 

 

if temp1 ="00011100" then --A 

data1 <= "1111001"; 

data0 <= "1000000"; 

 

ELSIF temp1 ="00110010" then --B 

data1 <= "0100100"; 

data0 <= "1000000";  

 

ELSIF temp1 ="00100001" then --C 

data1 <= "0110000"; 

data0 <= "1000000"; 

 

ELSE  

NULL; 

END IF;  

 

WHEN OTHERS => null;  

 

 

END CASE; 

END PROCESS; 

-------------------------------------------------------------------- 

 

but the problem arises when i have to use the keypad numbers. the make and break codes for the keys are longer than 8 bits as shown here https://www.alteraforum.com/forum/attachment.php?attachmentid=2162  

 

the reason why i want to use them as numbers, keypad 1(End), 2(Down), 3(Page Down), 4(Left), 6(Right), 7(Home), 8(Up), 9(Page Up) keys and keyboard's Home, Page up, Page down, End, Up, Down, Left & Right, share same scan codes when num lock is off. i really dont how to go about solving this problem (to write the process required). The complete keyboard code is attached. please help me out guys. 

 

Regards 

Dante
0 Kudos
0 Replies
Reply