PMOD GYRO

My dear friends
HELP!!!!!!
I will cry
Could you teach me how to connect and receive data from pmod between UART, designing with vivado. The explanation must be dummy level :) THAAAAAAAANKS

0 Former Member over 10 years ago

You are going to have to be more specific in what you are trying to accomplish. You mention PMOD and UART and have GYRO in your title but you don't explain what data you want to receive, from where, or where you want to send it.

You may want to start with a tutorial. The Avnet Zynq Speedways have labs targeted to the ZedBoard and MicroZed:
Developing Zynq-7000 All Programmable SoC Software (Vivado 2013.3 and 2014.4.1)
Developing Zynq-7000 All Programmable SoC Hardware (Vivado 2013.3 and 2014.4.1)

There is also the Zynq Concepts, Tools and Techniques for ZedBoard tutorial found here: http://zedboard.org/support/design/1521/11

-Gary
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0 Former Member over 10 years ago in reply to Former Member

Hi,

I have been trying to figure this out for several months with no success:

I have created a circuit to do some math and store the results in a FIFO RAM. I can then read them from the FIFO and display them on my terminal. This is a very slow process, and rather involved to then get that data saved onto the HDD.

Instead, I would like to read the data from the FIFO and transmit it through MAXIM technologies PMOD MAX3232, which utilizes the UART interface, to a serial port on my computer. Unfortunately I can't make the mental leap to get this done. I have followed the Zynq Workshop for Beginners tutorial http://www.silica.com/fileadmin/02_Products/Productdetails/Xilinx/Zynq_ZedBoard_Vivado_Workshop_ver1.0.pdf and can use the MAXIM temperature sensor with the SPI interface; but, the leap to the UART interface, and then tying the constraints to a specific PMOD port on a Zedboard is eluding me.

(I also have an Ethernet PMOD and a SD card PMOD that I would consider utilizing to store my data, but wanted to start with serial/RS232 since I thought it would be easier.)

Any suggestions would be greatly appreciated.

Thanks!

Stuart
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0 Former Member over 10 years ago

I have used the MAX3232 PMOD and it works fine with the ZedBoard.

First, recognize that the MAX3232 is only a logic level to RS232 converter. You will need to convert the 'raw' data from your FIFO into ASCII format if you want it to be displayed correctly in the Putty or TeraTerm terminal window on your PC. Then you will need to 'serialized' the data using a UART type function.

Once you have your serialized ASCII data, select one of the PL based PMOD connectors on the ZedBoard. Then, in your Vivado Block Diagram, connect the serial output of your UART to the PMOD pin 2. Connect the serial input of your UART to PMOD pin 3. You can do this by connecting the signals to an input and an output port and then generate a constraints file (.xdc) to let the Vivado tools know which phyical pins you want to connect the signals to. The ZedBoard Concepts, Tools and Techniques tutorial has a good example of these steps. It can be downloaded here: http://zedboard.org/support/design/1521/11

You could also start with the ZedBoard master constraints file posted here: http://zedboard.org/support/documentation/1521

-Gary
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