#NuttX Apps on Star64 #JH7110 won't produce any Console Output ... Let's find out why
Article: https://lupyuen.codeberg.page/articles/plic.html#no-console-output-from-nuttx-apps
Serial Output in Apache #NuttX RTOS works like this
Article: https://lupyuen.codeberg.page/articles/plic.html#serial-output-in-nuttx-qemu
Apache #NuttX RTOS handles UART Interrupts for Serial Input
Article: https://lupyuen.codeberg.page/articles/plic.html#serial-input-in-nuttx-qemu
UART is not ready to Transmit on Apache #NuttX RTOS for Star64 #JH7110 ... Let's find out why
Article: https://lupyuen.codeberg.page/articles/plic.html#star64-vs-qemu-serial-io
#NuttX on Star64 #JH7110 won't trigger UART Interrupts ... Let's check the Interrupt Number
Article: https://lupyuen.codeberg.page/articles/plic.html#jh7110-uart-interrupt
Inside #JH7110 is the #RISCV Platform-Level Interrupt Controller (PLIC) ... That handles Interrupts triggered by Peripherals
Article: https://lupyuen.codeberg.page/articles/plic.html#platform-level-interrupt-controller
Each #RISCV Core in #JH7110 can be programmed individually to receive Interrupts ... In Machine or Supervisor Modes
Article: https://lupyuen.codeberg.page/articles/plic.html#memory-map
How we Claim and Complete #RISCV Interrupts ... With the PLIC Interrupt Controller
Article: https://lupyuen.codeberg.page/articles/plic.html#claim-and-complete-interrupts
Apache #NuttX RTOS runs in Supervisor Mode ... So we delegate #RISCV Interrupts from Machine Mode to Supervisor Mode
Article: https://lupyuen.codeberg.page/articles/plic.html#delegate-machine-mode-interrupts-to-supervisor-mode
Star64 #JH7110 triggers too many UART Interrupts on Apache #NuttX RTOS ... Let's find out why
Article: https://lupyuen.codeberg.page/articles/plic.html#spurious-uart-interrupts
StarFive #JH7110 SoC uses a Synopsys DesignWare 8250 UART ... Before we set the Line Control Register (LCR), we must wait until the UART is not busy
Article: https://lupyuen.codeberg.page/articles/plic.html#appendix-fix-the-spurious-uart-interrupts
Apache #NuttX RTOS on #RISCV Star64 #JH7110 SBC has a problem with Serial I/O and the Platform-Level Interrupt Controller (PLIC) ... Here's how we fix it
https://lupyuen.codeberg.page/articles/plic
Here's how we init the #RISCV PLIC Interrupt Controller with Apache #NuttX RTOS
Article: https://lupyuen.codeberg.page/articles/plic.html#initialise-interrupts