willnsa.blogg.se

Please check LinuxConfig about how to select the other console device instead of JTAG UART. You can keep both the JTAG UART and serial UART in SOPC builder, but you must disable "Support for console on Altera JTAG UART" in kernel config and rebuild the kernel image.

You should use Serial UART with a RS232C cable instead. Because the JTAG UART will hang without a nios2-terminal connected. You should not use it as console device if you want your system to start automatically when power on. Though we can use JTAG UART as console with nios2-terminal during development.

But flash have limited write life and the write speed is slow, so you should not program the flash until you have your system mostly tested. To enable the system to start from power on, we need to write sof and program to flash. But the content of FPGA and SDRAM will lose when power off. With extensive expertise in FPGA technology, hardware design, software programming, and embedded systems, Opal Kelly is aware of the problems facing engineers today and is committed to providing solutions that fill the time and expertise gap for efficient interconnect functionality, allowing development teams to focus on core competencies, thereby reducing overall design time and expense and accelerating time-to-market.During development, we use nios2-configure-sof and nios2-download to config the FPGA and run Nios II program from SDRAM. Using Opal Kelly modules, design engineers, college professors, students, researchers, and hobbyists have all been relieved of the time, expense, and reliability concerns of inventing their own PC interconnection. Since 2004, the use of Opal Kelly modules has spread throughout the world – from University research labs and classrooms to some of the largest global commercial firms (and some of the very smallest). Opal Kelly Incorporated, located in Portland Oregon, provides a range of powerful USB and PCI Express FPGA modules that deliver the critical interconnection between a PC and many electronic devices.