# Issues with 2026.2 on Digilent Arty-A7 **URL:** \ **Category:** NOEL-V\ **Created:** [27 July 2026 11:28 UTC](https://discourse.grlib.community/t/issues-with-2026-2-on-digilent-arty-a7/584 "2026-07-27T11:28:54Z")\ **Posts on this page:** 2\ **Page:** 1

**Author:** ![robamu](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@robamu](https://discourse.grlib.community/u/robamu)\ **Post date:** [27 July 2026 11:28 UTC](https://discourse.grlib.community/t/issues-with-2026-2-on-digilent-arty-a7/584/1 "2026-07-27T11:28:54Z")

Hello, First of all, thanks a lot for providing the open-source Noel-V design! It is a great thing this exists and I learnt a lot while using it. I am currently trying some experiment of running Rust on a Noel-V using the Arty-A7 project (in case you are interested, you can find that [here](https://github.com/us-irs/noelv-rs-experiments).) I managed to make some simple applications run on the grlib-gpl-2025.2-b4298 that you [provide here](https://download.gaisler.com/products/GRLIB/bin/) . However, I could not make grlib-gpl-2026.2-b4300 work. I used `make xconfig` to re-configure the project to the IMAFC configuration with one core, and then built the project using Vivado 2026.1. This works, and I can then flash the design and I can also probe AHB masters and register information. When I try to flash and run a minimal app using grmon4 and then single-step through the first few instructions, the program/processor seems to be stuck executing the first few instructions. Those instructions are related to reading the hart ID and/or disabling the interrupts. The disassemble command output and reading the first few bytes using the grmon mem read functions also prints (seemingly) incorrect information. I attached the info sys output between both version below. I am a RISC-V beginner, so this is all new for me, and all help and guidance on what might be going wrong would be greatly appreciated. I think one interesting change was that the cmemconf variable was changed. Changing it back to 0 makes disassemble and mem read work, but i still have the same issue that I can not run code. Some background information: The startup assembler comes from the riscv-rt Rust library. It works well for the older designs. I think you might have to update the ACLINT base address or some other interrupt controller related based address in the GRIP NOELVSYS docs, which now seems to be 0xB0000000. `info sys` output for grlib-gpl-2025.2-b4298: ```auto ❯ grmon -digilent GRMON debug monitor v4.1.2 64-bit eval version Copyright (C) 2026 Frontgrade Gaisler - All rights reserved. For latest updates, go to https://www.gaisler.com/ Comments or bug-reports to support@gaisler.com This eval version will expire on 25/12/2026 WARNING! Share directory not found JTAG chain (1): xc7a100t Device ID: 0x330 GRLIB build version: 4298 Detected frequency: 40.0 MHz Component Vendor NOEL-V RISC-V Processor Frontgrade Gaisler AHB Debug UART Frontgrade Gaisler JTAG Debug Link Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler Xilinx MIG Controller Frontgrade Gaisler Generic AHB ROM Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler RISC-V ACLINT Frontgrade Gaisler RISC-V PLIC Frontgrade Gaisler RISC-V Debug Module Frontgrade Gaisler Generic UART Frontgrade Gaisler Modular Timer Unit Frontgrade Gaisler Version and Revision Register Frontgrade Gaisler AHB Status Register Frontgrade Gaisler General Purpose I/O port Frontgrade Gaisler Use command 'info sys' to print a detailed report of attached cores grmon4> info sys cpu0 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 0 ahbuart0 Frontgrade Gaisler AHB Debug UART AHB Master 9 APB: ff986000 - ff986100 Baudrate 115200, AHB frequency 40.00 MHz ahbjtag0 Frontgrade Gaisler JTAG Debug Link AHB Master 10 apbmst0 Frontgrade Gaisler AHB/APB Bridge AHB: ff900000 - ffa00000 mig0 Frontgrade Gaisler Xilinx MIG Controller AHB: 00000000 - 80000000 APB: ff980000 - ff980100 SDRAM: 256 Mbyte ahbrom0 Frontgrade Gaisler Generic AHB ROM AHB: c0000000 - e0000000 32-bit ROM: 512 MB @ 0xc0000000 apbmst1 Frontgrade Gaisler AHB/APB Bridge AHB: ff400000 - ff500000 apbmst2 Frontgrade Gaisler AHB/APB Bridge AHB: ff500000 - ff600000 clint0 Frontgrade Gaisler RISC-V ACLINT AHB: e0000000 - e0100000 plic0 Frontgrade Gaisler RISC-V PLIC AHB: f8000000 - fc000000 4 contexts, 31 interrupt sources, 7 max priority dm0 Frontgrade Gaisler RISC-V Debug Module AHB: fe000000 - ff000000 AHB trace: 64 lines, 128-bit bus hart0: ISA rv32imafc, Modes M U i, m, a, f, c, zaamo, zalrsc, zba, zbs, zca, zcf, zfa zfbfmin, zfh, zicntr, zicond, zifencei, zihpm, zimop Stack pointer 0x0ffffff0 icache 4 * 4 kB, 32 B/line, rnd, dcache 4 * 4 kB, 32 B/line, rnd 3 triggers, itrace 64 lines uart0 Frontgrade Gaisler Generic UART APB: ff900000 - ff900100 IRQ: 1 Baudrate 38461 FIFO debug mode available gptimer0 Frontgrade Gaisler Modular Timer Unit APB: ff908000 - ff908100 IRQ: 2 16-bit scaler, 2 * 32-bit timers, divisor 40 version0 Frontgrade Gaisler Version and Revision Register APB: ff981000 - ff981100 Version 513, Revision 140 ahbstat0 Frontgrade Gaisler AHB Status Register APB: ff982000 - ff982100 IRQ: 4 gpio0 Frontgrade Gaisler General Purpose I/O port APB: ff983000 - ff983100 grmon4> ``` info sys output for grlib-gpl-2026.2-b4300: ```auto ❯ grmon -digilent GRMON debug monitor v4.1.2 64-bit eval version Copyright (C) 2026 Frontgrade Gaisler - All rights reserved. For latest updates, go to https://www.gaisler.com/ Comments or bug-reports to support@gaisler.com This eval version will expire on 25/12/2026 WARNING! Share directory not found JTAG chain (1): xc7a100t Device ID: 0x330 GRLIB build version: 4300 Detected frequency: 40.0 MHz Component Vendor NOEL-V RISC-V Processor Frontgrade Gaisler RISC-V Debug Module Frontgrade Gaisler AHB Debug UART Frontgrade Gaisler JTAG Debug Link Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler Xilinx MIG Controller Frontgrade Gaisler Generic AHB ROM Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler AHB/APB Bridge Frontgrade Gaisler RISC-V Interrupt Controllers Frontgrade Gaisler Generic UART Frontgrade Gaisler Modular Timer Unit Frontgrade Gaisler Version and Revision Register Frontgrade Gaisler AHB Status Register Frontgrade Gaisler General Purpose I/O port Frontgrade Gaisler Use command 'info sys' to print a detailed report of attached cores grmon4> info sys cpu0 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 0 dm0 Frontgrade Gaisler RISC-V Debug Module AHB Master 9 AHB Master 7 AHB: e0000000 - e1000000 AHB: f8400000 - f8500000 hart0: ISA rv32imac, Modes M U i, m, a, c, smepmp, smpmpmt, svrsw60t59b, zaamo, zalrsc zba, zbs, zca, zcb, zcmop, zicntr, zicond, zifencei zihpm, zimop, zkt Stack pointer 0x0ffffff0 icache 4 * 4 kB, 32 B/line, lru, dcache 4 * 4 kB, 32 B/line, lru 3 triggers, itrace 32 lines ahbuart0 Frontgrade Gaisler AHB Debug UART AHB Master 0 APB: ff986000 - ff986100 Baudrate 115200, AHB frequency 40.00 MHz ahbjtag0 Frontgrade Gaisler JTAG Debug Link AHB Master 1 apbmst0 Frontgrade Gaisler AHB/APB Bridge AHB: ff900000 - ffa00000 mig0 Frontgrade Gaisler Xilinx MIG Controller AHB: 00000000 - 80000000 APB: ff980000 - ff980100 SDRAM: 256 Mbyte ahbrom0 Frontgrade Gaisler Generic AHB ROM AHB: c0000000 - e0000000 32-bit ROM: 512 MB @ 0xc0000000 apbmst1 Frontgrade Gaisler AHB/APB Bridge AHB: ff400000 - ff500000 apbmst2 Frontgrade Gaisler AHB/APB Bridge AHB: ff500000 - ff600000 rvintctrl0 Frontgrade Gaisler RISC-V Interrupt Controllers AHB: b0000000 - b0100000 AHB: fc000000 - fc400000 USR: 00000009 Backend: clint0 plic0 uart0 Frontgrade Gaisler Generic UART APB: ff900000 - ff900100 IRQ: 1 Baudrate 38461 FIFO debug mode available 16550 interface available gptimer0 Frontgrade Gaisler Modular Timer Unit APB: ff908000 - ff908100 IRQ: 2 16-bit scaler, 2 * 32-bit timers, divisor 40 version0 Frontgrade Gaisler Version and Revision Register APB: ff981000 - ff981100 Version 515, Revision 140 ahbstat0 Frontgrade Gaisler AHB Status Register APB: ff982000 - ff982100 IRQ: 4 gpio0 Frontgrade Gaisler General Purpose I/O port APB: ff983000 - ff983100 clint0 Frontgrade Gaisler RISC-V ACLINT AHB: b0000000 - b0100000 plic0 Frontgrade Gaisler RISC-V PLIC AHB: fc000000 - fc400000 AHB: b0018100 - b0018180 4 contexts, 31 interrupt sources, 7 max priority grmon4> ``` ---

**Author:** ![robamu](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@robamu](https://discourse.grlib.community/u/robamu)\ **Post date:** [4 August 2026 11:11 UTC](https://discourse.grlib.community/t/issues-with-2026-2-on-digilent-arty-a7/584/2 "2026-08-04T11:11:08Z")

Just as an update notice: I have also managed to test async/await support using the embassy framework while also adding embassy-time support. embassy is currently one of the most popular embedded Rust frameworks and simplifies software development by leveraging the async/await support baked into the language. I might also add platform specific support to allow using interrupt executor, which makes this even more viable for real-time systems.