[video member=miotatsu stream_platform=twitch project=riscy title="Understanding the Rest of the PLIC Driver & RTC_FREQUENCY" vod_platform=youtube id=m_NKQhXxh2Y annotator=Miblo]
[0:20][Recap yesterday's confusion with a few words on things stewing in our minds]
[1:23][First realisation: Shifting right is dividing by a power of 2][:blackboard]
[4:07][Second realisation: The smallest addressable unit is a byte, not a bit][:blackboard]
[5:55][Third realisation: n & 0x7 == n % 8][:blackboard :math]
[8:13][What PLIC_enable_interrupt() is doing][:blackboard :research]
[13:49][Performing PLIC_enable_interrupt() for gpio0 at 0x8][:blackboard :research]
[18:07][Read and understand PLIC_disable_interrupt()][:research]
[20:12][Begin to understand PLIC_set_priority() in conjunction with the Freedom E310-G000 Manual[ref
    site="SiFive Developers"
    page="Freedom E310-G000 Manual"
    url=https://www.sifive.com/documentation/chips/freedom-e310-g000-manual/] and the Draft Privileged ISA Specification[ref
    site="RISC-V"
    page="Draft Privileged ISA Specification v1.9.1"
    url=https://riscv.org/specifications/privileged-isa/]][:research]
[28:54][Continue reading PLIC_set_priority()][:research]
[33:49][Begin to understand PLIC_claim_interrupt()][:research]
[36:11][:Research what we use PLIC_claim_interrupt() for in the Draft Privileged ISA Specification]
[40:17][Summarise what PLIC_claim_interrupt() is for][:research]
[41:17][Read and understand PLIC_complete_interrupt() in conjunction with the Draft Privileged ISA Specification and the E3 Coreplex Manual[ref
    site="SiFive Developers"
    page="E3 Coreplex Manual"
    url=https://static.dev.sifive.com/pdfjs/web/viewer.html?file=https://static.dev.sifive.com/SiFive-E3-Coreplex-v1.2.pdf]][:research]
[47:55][Summarise both PLIC_complete_interrupt() and PLIC_claim_interrupt()][:research]
[48:49][Read demo.gpio.c from the top down, starting with the RTC Frequency][:research]
[50:06][:Research the Real-Time Clock in the Platform Reference Manual[ref
        site="SiFive Developers"
        page="Platform Reference Manual"
        url=https://www.sifive.com/documentation/freedom-soc/freedom-e300-platform-reference-manual/]]
[56:17][Begin to understand reset_demo() in conjunction with the Draft Privileged ISA Specification][:research]
[58:58][Determine to understand clear_csr() with reference to documentation on the GNU Inline Assembly syntax][:research]
[1:02:37][We are out of time for today, with a mention of the poll[ref
    site=Twitter
    page="Poll: Should I hire an artist to make better thumbnails for my content?"
    url=https://twitter.com/hmn_riscy/status/833911733752385536]]
[/video]
