DE0_SoC_VGA

DE0 Nano SoC: 5csema4u23c6

The system contains

• Nios II/e processor
• HPS
• 64kB on-chip memory
• JTAG UART
• Address Span Expender
• Used to access the HPS memory
• 20 bit span: 4MBytes of available memory
• https://documentation.altera.com/#/link/mwh1409960181641/mwh1409959261007
• Set burst bits to 8: max burst count is 2^8
• Set sub windows offset to the address reserved
• mSGDMA
• Double clock FIFO streaming to streaming
• 8196 bytes
• 32 bit stream source and sink
• PLL (for clock generation depending on the resolution)
• Custom module for VGA
• I2C FPGA module

The goal of this project is to use a VGA connector to display an image on a monitor Use the I2C of the VGA to get the supported resolution of the screen. Supported resolution:

• 1024x768 @ 60 Hz (pixel clock 65 MHz)
• 800x600 @ 60 Hz (pixel clock 40 MHz)
• 640x480 @ 60 Hz (pixel clock 25 MHz)

The image is on the Nios-II processor and send through the DMA to the VGA controller.

Generate the QSYS (open Qsys, open system.qsys, refresh usinf F5)

Run the TCL script system/synthesis/submodules/hps_sdram_p0_pin_assignments.tcl for the SDRAM assignement Run the TCL script pin_assignment_DE0_Nano_SoC_VGA_extension.tcl to get the pin assignment

The FPGA cannot access the HPS memory if the HPS did not configure it. So a SD card must be flashed and plugged in to the board.

Simulation ModelSim

• Test benches have been written for the modules
• They are quite generic and can be used for a template
• The waves/signals layout can be imported by running the script wave.do once the simulation is launched
• do wave.do

Fixes:

• If the IRQ numbers are set to '-1' in the system.h file, it means that the set_interface_property\ associatedAddressablePoint is not set. This can be fixed in the GUI when you edit the tcl component.
• Select the Interrupt Sender
• In "Parameter", "Associated addressable interface" field should be set. (i.e. not NONE) Note; Only one IRQ can be done per components. Otherwise you get the following error during the BSP generation in ECLIPSE NIOS II

SEVERE: Can only have at most one IRQ associated with the following slaves of module SEVERE: Can only have at most one IRQ associated with the following slaves of module SEVERE: nios2-bsp-generate-files failed.

Interesting links: http://www-ug.eecg.toronto.edu/msl/nios_interrupts.html http://www-ug.eecg.toronto.edu/msl/manuals/n2sw_nii52006.pdf