PYNQ Z1 UART Abount Baud Rate

AliFurkanFINDIK · July 26, 2023, 8:58am

Hello.

I have a PYNQ Z1 board.

I want to communicate the sensor with the uart communication using the arduino pins on the board. Baud rate 9600 is seen in the documents. Is it possible to set a baud rate of 115200. How to do it if possible.

Thanks

Ali

cathalmccabe · July 28, 2023, 10:46am

The Arduino IOP and the UART IP is in the PL, and unfortunately this parameter is not controllable from software.
You would need to change this parameter and rebuild the base overlay.
The parameter is here in the Tcl.

github.com

Xilinx/PYNQ/blob/de6b6fc3a803945d59f8f06523addfe0d9b60a1c/boards/Pynq-Z1/base/base.tcl#L2312


      
          
           # Create instance: spi_subsystem
           create_hier_cell_spi_subsystem $hier_obj spi_subsystem
          
           # Create instance: timers_subsystem
           create_hier_cell_timers_subsystem $hier_obj timers_subsystem
          
           # Create instance: uartlite, and set properties
           set uartlite [ create_bd_cell -type ip -vlnv xilinx.com:ip:axi_uartlite:2.0 uartlite ]
           set_property -dict [ list \
            CONFIG.C_BAUDRATE {9600} \
          ] $uartlite
          
           # Create instance: xadc, and set properties
           set xadc [ create_bd_cell -type ip -vlnv xilinx.com:ip:xadc_wiz:3.3 xadc ]
           set_property -dict [ list \
            CONFIG.AVERAGE_ENABLE_TEMPERATURE {true} \
            CONFIG.AVERAGE_ENABLE_VAUXP0_VAUXN0 {true} \
            CONFIG.AVERAGE_ENABLE_VAUXP12_VAUXN12 {true} \
            CONFIG.AVERAGE_ENABLE_VAUXP13_VAUXN13 {true} \
            CONFIG.AVERAGE_ENABLE_VAUXP15_VAUXN15 {true} \

You could also build the block design in Vivado and change it in the GUI.

Cathal

AliFurkanFINDIK · July 28, 2023, 7:36pm

Grateful for your help Cathal

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PYNQ Z1 UART Abount Baud Rate

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