Issues producing a DAC output on EB013

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Aidan_OSullivan
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Issues producing a DAC output on EB013

Post by Aidan_OSullivan »

We have successfully read a voltage from the on-board potentiometer on the BL0114, stored the value in a variable 'x', and printed it to the LCD screen. We are now trying to send the variable 'x' to the DAC on the EB013 board and check that the output corresponds to the voltage we are measuring from the potentiometer.
When measuring the voltage entering the DAC it does not match the voltage being measured from the potentiometer. We have also been unable to produce an output from the DAC even when manually pulling the Enable pin low.
We are using the default DAC EN and NVM EN jumper pins on J5 and using Section B on J4 for SDO, SDI & SCK selection.
The port connections can be seen in Properties.PNG, the Hardware Setup can be seen in Hardware Setup.jpg, and the program file is also attached.

We believe our problem has something to do with assigning the correct pins in the program file and we are unsure about the difference between the software and channel SPI connections in the properties window.

Any help would be greatly appreciated!
Attachments
Properties.PNG
(61 KiB) Downloaded 588 times
Hardware Setup.jpg
Hardware Setup.jpg (197.44 KiB) Viewed 1553 times
DAC Output WIP.fcfx
(18.15 KiB) Downloaded 156 times

Aidan_OSullivan
Posts: 13
Joined: Wed Jun 05, 2019 9:57 am
Has thanked: 7 times
Been thanked: 2 times

Re: Issues producing a DAC output on EB013

Post by Aidan_OSullivan »

Update: We successfully managed to output a voltage from the DAC. To achieve this we wired the patch system (Section C or J6) on the EB013 instead of using J4, as in our previous attempt. We then assigned NVM EN, DAC EN, SDO, SDI and SCK pins in the software to match the wired connections in the hardware.
Attachments
Properties_Finaldraft.PNG
(86.5 KiB) Downloaded 575 times

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