In the paper, a fast-programmable interrupt controller(FPIC) based on the RISCV architecture is introduced.Compared with the standard RISCV interrupt controler PLIC, FPIC has the HPE and VTF interrupt technology.Compare the difference of interrupt processing flow between FPIC and PLIC of WCH self-developed RISCV microprocessor Qingke V4, and take the general 32bit interconnected MCU Chitu V307 as the experimental chip to verify the measured difference of interrupt latency between on and off HPE and VTF modes.
Key words
RISCV /
FPIC /
HPE /
VTF /
Qingke V4 /
Chitu V307
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