In a recent blog post by Adam Taylor, he examines how to approach using Pmods if there is not a driver available. His solution is to use the Pmod bridge in the Zynq SoC’s PL (programmable logic) to correctly map Pmod ports on a development board and to create a Zynq PS (processing system) driver.
The Pmod STEP provides a four channel drive for a stepper motor via the ST L293DD. Users may wire two pairs of channels in series to drive up to 600 mA of current per. The strangest part is that the device manager on the laptop shows 2 generic “USB Serial Converter A and USB Serial Converter B” drivers. The PC automatically sees the port as “Digilent USB Device, Dual RS232-HS (interface 0) and interface 1”. The PC showing the Digilent drivers is the one that fails. In this design, you are going to be asked to do a VGA Controller to display something on your monitor. Actually, VGA controller is a quite simple design which only requires two counters and several comparators. This is the first time to connect my Zedboard to PC. On bord MIO6-2 are all tighed to GND and J17(PROG) is connetcted to PC by USB cable. I'd like to program Zynq by USB-JTAG. But PC can't find 'Digilent USB Device', would you pls let me know from where I can get the driver?
For his example, he uses a Digilent’s DA4 octal DAC Pmod integrated with Digilent’s dual ADC AD2 Pmod.
The Pmod bridge allows for the definition of input types for both the top and bottom rows of the Pmod connector. This setup allows for the user to select from either GPIO, UART, IIC, or SPI interfaces. This helps the Pmod connector align with the standard for interface type.
For his example, he used a SPI interface on the top row. Then he selected the actual SPI communication channel.
As we are using the Zynq SoC, we have two options. The first would be to use an AXI SPI IP block within the PL and connected to the bridge. The second approach—and the one I am going to use—is to connect the bridge to the Zynq PS’ SPI using EMIO. This choice provides us with the ability to wire the pins from the PS SPI ports to the bridge inputs directly
To do this, he mapped the pins for this example, his diagram for the Pmod DA4 is shown below.
He uses the SPI drivers created by the BSP to drive the DA4, and to interact with his device. Then he drove a simple ramp output with the Analog Discovery monitoring the DAC output. One this was working as expected, he connected the DA4 and the AD2 together so that the Zynq SoC could receive the signal:
If you are interested in this project or learning more about Pmod drivers, please check out the original post and/or his git hub repository.
This seller is currently away until Jan 05, Image not available Photos not available for this variation. This item will be shipped through the Global Shipping Program and includes international tracking. Design Tools – Others: I’ve never had the slightest problem with them on these boards. Does the Digilent cable plug into that? Besides what I said on the 2nd step, the cheaper will most likely behave.
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Back to home page. Will usually ship within 3 business days jrag receiving cleared payment – opens in a new window or tab. First, the Digilent site states that their cable is not for use with any of their cards, as all of them have builtin circuits. Skip to main content. Learn more – jtav in new window or tab. Combined Shipments Ebay should manage combined shipment of different items automatically.
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ZCU Digilent USB-to-JTAG Module, Circuit, Pictures and Diagram
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I’ve never had the slightest problem with them on these boards.
Digilent JTAG USB Cable (250-003)
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Digilent Zybo Driver
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Digilent Usb Jtag Driver
In this way, you can program devices on Digilent programmable digllent boards using the Digilent Adept Ussb.