Forum Discussion
ContributorDiscrete RSU User Logic
ContributorI try this but I cannot do that because for creating a component we need the signals types and lengths and I don't know these signals' informations just their names. Addition to this I'm still very shocked about how Intel's documentations in discrete RSU is realy bad even there is no documentation and when I ask about this topic this forum didn't tell me anything except I already know.
New ContributorExactly, I am trying to make discrete RSU logic for months, as an intern in a company. I am not sure is this a suitable project for an intern or not but I do have hard times. AN741 documentation is just for Nios II, just the video mention discrete logic yet some sentences. I will use On-Chip Flash IP Core, and UART core. I should design the state machine myself. The on-chip IP user guide is well-documented but UART is not. I could not find how to access the registers inside the UART core. By the way, I will not use Dual-Configuration IP logic, since I will delete the CFM first and put the new image to CFM. That's why I think I do not need to trigger it since it automatically uses the image that I put in CFM. Am I wrong? Thanks in advance..
- jozephka99
First, you can refer that link for example RSU code with UART: (https://community.intel.com/t5/FPGA-SoC-And-CPLD-Boards-And/Max1000-Remote-System-Upgrade-via-SPI/m-p/1368963/highlight/true#M22012).
Second, you can use this UART core: (https://opencores.org/projects/simple_uart_for_fpga). It is very simple, easy to use and you can control everything.
Third, in fact RSU logic without Nios is not that complex, but lack of documentation complicate it. As you know there are 2 images in MAX10 devices. 2 CFMs for image2 and 1 CFM for image1. Normally if you didn't do contrary, device begins with image1. You can change this with driving config_sel pin physically. If there is no image of one of them, or the image is broken, device begins with solid one. If both of them is broken or not programmed, device cannot begin. Yes you can clear and reprogram the working image when its working, but I think you have to still use the dual IP core. Because device not restarts itself when new CFM image loaded. You do it with IP. Maybe manual power on-off can work either, but in that case of "Remote" System Upgrade, you don't want to do it.
- saconnex
Thanks a lot. I'll check them.
