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Found 29 results

  1. Hi all. I recieved my LogicStart today so as I have a few hours spare I thought I'd get cracking wth Hamster's PDF of tutorials and info. I've just finished making a 4 bit adder using the swithces and LEDs of the board and would like to know if my code looks right. It seems to work.. From right to left, the switches in 2 groups of 4 seem to add up all the way to 15. The code is here: entity switches_leds is Port ( switches : in STD_LOGIC_VECTOR(7 downto 0);LEDs : out STD_LOGIC_VECTOR(7 downto 0));end switches_leds;architecture Behavioral of switches_leds issignal x : STD_LOGIC_VECTOR (3 downto 0);signal y : STD_LOGIC_VECTOR (3 downto 0);signal carry : STD_LOGIC_VECTOR (3 downto 0);signal result : STD_LOGIC_VECTOR (4 downto 0);beginLEDs <= "000" & result;x <= switches (3 downto 0);y <= switches ( 7 downto 4 );result(0) <= x(0) XOR y(0);carry(0) <= x(0) AND y(0);result(1) <= x(1) XOR y(1) XOR carry(0);carry(1) <= (x(1) AND y(1)) OR (carry(0) AND x(1)) OR (carry(0) AND y(1));result(2) <= x(2) XOR y(2) XOR carry(1);carry(2) <= (x(2) AND y(2)) OR (carry(1) AND x(2)) OR (carry(1) AND y(2));result(3) <= x(3) XOR y(3) XOR carry(2);carry(3) <= (x(3) AND y(3)) OR (carry(2) AND x(3)) OR (carry(2) AND y(3));--result(4) <= x(4) XOR y(4) XOR carry(3);--carry(4) <= x(4) AND y(4) OR (carry(3) AND x(4)) OR (carry(3) AND y(4));end Behavioral; I have some boolean experience having gone to college to do an access course in Audio electronics/music technology and being thrown in the deep end of boolean logic. :s At the time all of us in the class were wondering where it all fitted in with Audio systems electronics but I am glad of it now. If someone could verify this for me I'd be much appreciative. All the best, Steve.
  2. Hi. I have recieved my Papilio one 500 in the post. Still waiting for the Logicstart board though. In the mean time I have been trying out the Zpuino examples with success. I saw some information about a TFT wing for the cheap 3.2" SSD1289 or ILD touchscreen LCDs from China. I saw the video on youtube but can't find any more info about this wing. I have 2 of these TFTs in my embedded parts bin. One has an SD card slot and the other not. Would there by any chance be any schematics for the TFT wing and is it on sale yet? I would love to have a go at building one myself...
  3. Hi all, I was enjoying playing successfully with a Papilio One 500K board, but after some unknown event (maybe trying a home-made wing that seemed OK?), my board is no longer recognized on the USB by my computer. Symptoms: when I plug the board on the computer, the Power LED is on, Power is supplied to the Wings supply pins (3.3V OK), but I no longer see the board from the computer. I tried even with low level tools, basically nothing is seen from the computer. Any idea how I could repair/debug this? (if this is even possible :-() Thanks, Jérôme
  4. Version 1.0

    294 downloads

    The Papilio Plus is a Papilo board with SRAM that is still in the prototyping phase. This is the generic ucf file for that board.