DAC with THDB-ADA on DE2-115

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I tried to test the program. However it doesnt work. I am using the altera DE2 board and the terasic daughter board. I checked the pin assignment. I cant see anything in the output. Could you help me with this???

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Could you tell me how you set up your design?

If I will check the basic operation, I would set it like:

Use an SMA cable to connect the ADC channel A to a generator, say you're using a 1V, 500kHz sine wave.

Use another SMA cable for the DAC channel A to the osciloscope.

Make sure the contact between your THDB ADA to your DE2-115 is HSMC and is firm (pushing it down a bit hard)

If it doesn't work either, check the jumpers on your daughter board. Leave it as default if you've changed something. I'm curently not with my board so I can't check it.

If it doesn't work either, connect the data, XIN, to the LEDS to check if it works. If not, make sure to set the ADC_OEA to 0

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Follow this

your entity should have:

XOUT : out std_logic_vector(13 downto 0);

YOUT : out std_logic_vector(13 downto 0);

-- adc 14 bit data inputs

XIN : in std_logic_vector(13 downto 0);

YIN : in std_logic_vector(13 downto 0);

-- Setup ADC and DAC

DAC_MODE : out std_logic; -- DAC mode, 1 for dual

DAC_WRTA : out std_logic; -- Write signal Channel A

DAC_WRTB : out std_logic; -- Write signal Channel B

ADC_OEA : out std_logic; -- Channel A enable

ADC_OEB : out std_logic; -- Channel b enable

PLL_OUT_ADC : out std_logic_vector(1 downto 0);

PLL_OUT_DAC : out std_logic_vector(1 downto 0)); -- Clock from HSMC

your interface:

--Clock processing---------------------------

process(CLOCK_50)

begin

if falling_edge(CLOCK_50) then

clockF <= not(clockF);

end if;

if rising_edge(CLOCK_50) then

clockR <= not(clockR);

end if;

end process;

--DAC and ADC interface----------------------

PLL_OUT_ADC(0) <= clockR;

PLL_OUT_ADC(1) <= clockR;

PLL_OUT_DAC(0) <= clockF;

PLL_OUT_DAC(1) <= clockF;

DAC_WRTA <= clockF;

DAC_WRTB <= clockF;

DAC_MODE <= '1'; -- Dual mode

ADC_OEA <= '0';

ADC_OEB <= '0';

--your outputs

YOUT <= YIN;;

XOUT <= XIN;

The whole thing should work.

Here is pins the assignment

ADC_OEA Location PIN_T25

ADC_OEB Location PIN_T26

CLOCK_50 Location PIN_Y2

DAC_MODE Location PIN_H24

DAC_WRTA Location PIN_H23

DAC_WRTB Location PIN_M25

PLL_OUT_ADC[0] Location PIN_G23

PLL_OUT_ADC[1] Location PIN_G24

PLL_OUT_DAC[0] Location PIN_V24

PLL_OUT_DAC[1] Location PIN_V23

RESET Location PIN_AB28

XIN[0] Location PIN_T22

XIN[1] Location PIN_T21

XIN[2] Location PIN_R23

XIN[3] Location PIN_R22

XIN[4] Location PIN_R21

XIN[5] Location PIN_P21

XIN[6] Location PIN_P26

XIN[7] Location PIN_P25

XIN[8] Location PIN_N26

XIN[9] Location PIN_N25

XIN[10] Location PIN_L22

XIN[11] Location PIN_L21

XIN[12] Location PIN_U26

XIN[13] Location PIN_U25

XOUT[0] Location PIN_D27

XOUT[1] Location PIN_D28

XOUT[2] Location PIN_E27

XOUT[3] Location PIN_E28

XOUT[4] Location PIN_F27

XOUT[5] Location PIN_F28

XOUT[6] Location PIN_G27

XOUT[7] Location PIN_G28

XOUT[8] Location PIN_K27

XOUT[9] Location PIN_K28

XOUT[10] Location PIN_M27

XOUT[11] Location PIN_M28

XOUT[12] Location PIN_K21

XOUT[13] Location PIN_K22

YIN[0] Location PIN_V22

YIN[1] Location PIN_U22

YIN[2] Location PIN_V28

YIN[3] Location PIN_V27

YIN[4] Location PIN_U28

YIN[5] Location PIN_U27

YIN[6] Location PIN_R28

YIN[7] Location PIN_R27

YIN[8] Location PIN_V26

YIN[9] Location PIN_V25

YIN[10] Location PIN_L28

YIN[11] Location PIN_L27

YIN[12] Location PIN_J26

YIN[13] Location PIN_J25

YOUT[0] Location PIN_F24

YOUT[1] Location PIN_F25

YOUT[2] Location PIN_D26

YOUT[3] Location PIN_C27

YOUT[4] Location PIN_F26

YOUT[5] Location PIN_E26

YOUT[6] Location PIN_G25

YOUT[7] Location PIN_G26

YOUT[8] Location PIN_H25

YOUT[9] Location PIN_H26

YOUT[10] Location PIN_K25

YOUT[11] Location PIN_K26

YOUT[12] Location PIN_L23

YOUT[13] Location PIN_L24

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Does this code work for a Cyclone IV? because I have different pin assigments and I'm using the De2-115 board and the data conversion HSMC.

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Does this code work for a Cyclone IV? because I have different pin assigments and I'm using the De2-115 board and the data conversion HSMC.

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That works for DE2-115 (Cyclone IV, for more specific, Cyclone IV EP4CE115F29C7N) using HSMC THDB ADA

Hi ,

I have to interface my Cyclone 3 starter kit with my ADA_thdb board. Can anyone tell me how to proceed with? Are there any sort of constraints or specific things to be noted while interfacing the two boards. I do not wish to spoil my board by programming it in a wrong way.

So any guidelines on how to start with will be appreciated.

Please do enlighten this beginner.

Thanks in advance.

I don't have a Cyclone 3 board here. I'm not sure what is your interface between the FPGA board and the daughter board. Is it HSMC or GPIO? Can you upload the pictures or give me the web links of your boards?

First, use the FPGA board manual to obtain the pins for your interface. Make sure you can make a correct pins assignment.

Second, try the program I wrote above.

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I don't have a Cyclone 3 board here. I'm not sure what is your interface between the FPGA board and the daughter board. Is it HSMC or GPIO? Can you upload the pictures or give me the web links of your boards?

First, use the FPGA board manual to obtain the pins for your interface. Make sure you can make a correct pins assignment.

Second, try the program I wrote above.

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Hi duytan ,

Ya sure , I am attaching the pics of the ADA borad .

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I don't have a Cyclone 3 board here. I'm not sure what is your interface between the FPGA board and the daughter board. Is it HSMC or GPIO? Can you upload the pictures or give me the web links of your boards?

First, use the FPGA board manual to obtain the pins for your interface. Make sure you can make a correct pins assignment.

Second, try the program I wrote above.

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Hi duytan ,

Ya sure , I am attaching the pics of the ADA borad . It is the HSMC board , the first one in the attached pdf. And ya, i'll refer to the pins and keep the assignments ready. Will you be able to verify them for me?

Cyclone 3 Starter board link is here.

http://www.altera.com/products/devkits/altera/kit-cyc3-starter.html

Thanks !

Pins assignment for Cyclone 3 Starter Board

Assign this and try my code above

ADC_OEA Location PIN_T3

ADC_OEB Location PIN_R3

CLOCK_50 Location PIN_B9

DAC_MODE Location PIN_L1

DAC_WRTA Location PIN_T24

DAC_WRTB Location PIN_W25

PLL_OUT_ADC[0] Location PIN_V18

PLL_OUT_ADC[1] Location PIN_U18

PLL_OUT_DAC[0] Location PIN_C14

PLL_OUT_DAC[1] Location PIN_D14

RESET Location ==> Choose one of your switch

XIN[0] Location PIN_N13

XIN[1] Location PIN_M13

XIN[2] Location PIN_N6

XIN[3] Location PIN_M6

XIN[4] Location PIN_R18

XIN[5] Location PIN_R17

XIN[6] Location PIN_M14

XIN[7] Location PIN_L13

XIN[8] Location PIN_M17

XIN[9] Location PIN_L16

XIN[10] Location PIN_L18

XIN[11] Location PIN_K18

XIN[12] Location PIN_G18

XIN[13] Location PIN_G17

XOUT[0] Location PIN_T1

XOUT[1] Location PIN_N7

XOUT[2] Location PIN_N8

XOUT[3] Location PIN_J13

XOUT[4] Location PIN_N10

XOUT[5] Location PIN_N11

XOUT[6] Location PIN_K17

XOUT[7] Location PIN_P11

XOUT[8] Location PIN_B2

XOUT[9] Location PIN_B1

XOUT[10] Location PIN_G2

XOUT[11] Location PIN_G1

XOUT[12] Location PIN_K2

XOUT[13] Location PIN_K1

YIN[0] Location PIN_T18

YIN[1] Location PIN_T17

YIN[2] Location PIN_R4

YIN[3] Location PIN_R5

YIN[4] Location PIN_P18

YIN[5] Location PIN_P17

YIN[6] Location PIN_L15

YIN[7] Location PIN_L14

YIN[8] Location PIN_M18

YIN[9] Location PIN_L17

YIN[10] Location PIN_H18

YIN[11] Location PIN_H17

YIN[12] Location PIN_E18

YIN[13] Location PIN_E17

YOUT[0] Location PIN_M3

YOUT[1] Location PIN_T2

YOUT[2] Location PIN_H15

YOUT[3] Location PIN_H16

YOUT[4] Location PIN_N16

YOUT[5] Location PIN_N15

YOUT[6] Location PIN_R16

YOUT[7] Location PIN_T16

YOUT[8] Location PIN_C2

YOUT[9] Location PIN_C1

YOUT[10] Location PIN_H2

YOUT[11] Location PIN_H1

YOUT[12] Location PIN_K5

YOUT[13] Location PIN_L5

Hi tan,

I am currently creating a spread-sheet for the pin assignments. Well thanks a lot! i'll verify my assignments with what you have sent. I have another doubt,

The ADA board feature list mentions the following:

The feature set of the ADA is listed below:

1. Dual AD channels with 14-bit resolution and data rate up to 65 MSPS

2. Dual DA channels with 14-bit resolution and data rate up to 125 MSPS

3. Dual interfaces include HSMC and GPIO, which are fully compatible with Cyclone III Starter

Kit and DE1/DE2/DE2_70/DE2_115/DE3/DE4, respectively

4. Clock sources include oscillator 100MHz, SMA for AD and DA each, and PLL from either

HSMC or GPIO interface

5. AD converter analog input range 2V p-p range.

6. DA converter output voltage range 2V p-p range.

7. DA and AD converters do not support DC signaling

The entire board operates on DC-signaling if am not wrong, as our board is powered by an adapter. So what does it exactly mean by

DA and AD converters do not support DC signalling?

Also i think there is a mistake in the pins wrt_a and wrt_b as there is no pin such as T24 and W25 available.

Am attaching the schematics of Cyclone 3 Starter Board for your reference.

thanks!

ivads

If you are quite familiar with ADC and DAC, you will see that we need to adjust the gain value which is to adjust the converter into the amplitude of our signal. Well, don't mind if you don't understand what I've just said. I'm not a good explainer.

In other words, a signal source usually includes DC and AC component. It's like you have a sine wave but it is shifted up or down around the zero. It is because that sine wave is added to a DC component. That is very "annoying" in signal processing as it consumes power when processing, causing heat, reducing the accuracy of the represented binary, adding truncating noise to your signal when processing.

Any way, that statement means, you can only put AC signal into you SMA cable (for ADC) and create an AC signal (DAC)

Also, when you apply the signal onto your daughterboard, your DC component will be filtered out.

And by they way, I dont think you broke your board, it's maybe because of the contact between your board and daughterboad was not tight. Try to push them toghther harder