![]() ![]() ![]() (from the IP-catalog) if you have multiple peripherals.Ĭonnect ALL the ACLK and ARESETN pins of all peripherals and interconnects to the processor’s clock and reset Thats easier for a first try) or package it ("Tools", "Create and Package new IP") for the use in other projects.Ĭonnect your AXI-peripheral directly to the core’s AXI4-Interface if you only have one, or to an AXI-Interconnect Then either directly use that module in a new block-design ("Create Block Design", right-click → "Add Module", Instantiate the rtl/system_integration/neorv32_top_axi4lite.vhd module. Import all the core files from rtl/core (including default internal memory architectures from rtl/core/mem)Īnd assign them to a new design library neorv32. SPI clock pre-scaler (dividing main processor clock)ĭefines the base address of the executable in external flashĭefines the page base address where the XP flash will be mapped to SPI chip select output ( spi_csn_o) for selecting flash Set 1 to enable the usage of the SPI module (including load/store executables from/to SPI flash options) Time in seconds after the auto-boot sequence starts (if there is no UART input by the user) set to 0 to disabled auto-boot sequence GPIO output pin used for the high-active status LED Set to 0 to disable UART0 (no serial console at all)Įnable bootloader status led ("heart beat") at GPIO output port pin # STATUS_LED_PIN when 1 Bootloader configuration parameters Parameter Keep in mind that the maximum size for the bootloader is limited to 32kB and should be compiled using theīase ISA rv32i only to ensure it can work independently of the actual CPU configuration. Stream Link Interface (SLIN) for processor-external streaming modulesĮxternal Bus Interface (WISHBONE) for processor-external memory-mapped modules If there is no need to execute division in hardware, use the Zmmul extension instead of the full-scaleĭisable CPU extension that are not explicitly used.Ĭustom Functions Unit (CFU) for CPU-internal custom RISC-V instructionsĬustom Functions Subsystem (CFS) for tightly-coupled processor-internal co-processors Using LUTs to implement the multiplier ( FAST_MUL_EN ⇒ true). ![]() If you have unused DSP block available, you can map multiplication operations to those slices instead of Map CPU shift operations to a small and iterative shifter unit ( FAST_SHIFT_EN ⇒ false). Reduce the CPU’s prefetch buffer size ( CPU_IPB_ENTRIES). (number of instruction) and cycle (number of cycles) from synthesis by disabling the Zicntr ISA extension ![]() If not explicitly used/required, exclude the CPU standard counters instret The compressed instructions extension ( CPU_EXTENSION_RISCV_C) requires additional logic for the decoder butĪlso reduces program code size by approximately 30%. Use the embedded RISC-V CPU architecture extension ( CPU_EXTENSION_RISCV_E) to reduce block RAM utilization.
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