ULP-RISC-V internal timer interrupt not triggering (IDFGH-14752)

[Chalandi]

Hello,

I wrote a baremetal project on ESP32-S3 without using the SDK (https://github.com/Chalandi/Baremetal_esp32s3_nosdk).

For ULP-RISC-V, I can trigger peripheral interrupts but when trying to trigger the internal timer interrupt via the "timer" assembly instruction it does not trigger at all.

#define picorv32_timer_insn(_rd, _rs) \
r_type_insn(0b0000101, 0, regnum_ ## _rs, 0b110, regnum_ ## _rd, 0b0001011)

Also the TRM does not mention how to use the internal timer of the RISC-V (the RISC-V IP seems to be PicoRV32).

Could you please provide more information about the ULP-RISC-V internal timer ?

Thanks in advance