Lup Yuen Lee 李立源 @lupyuen@qoto.org

Here's how we attach our Interrupt Handler to #PinePhone's UART Port

https://lupyuen.github.io/articles/serial?9#attach-interrupt-handler

We've done #PinePhone UART with Polling ... Now we do UART with Interrupts!

https://lupyuen.github.io/articles/serial?8#uart-with-interrupts

Arm64 Assembly Macros for printing to #PinePhone's Serial Console ... Super helpful for our Arm64 Startup Code!

https://lupyuen.github.io/articles/serial?7#arm64-assembly

How we wait for UART Input on #PinePhone

https://lupyuen.github.io/articles/serial?6#wait-to-receive

Anything we type into #PinePhone’s Serial Console will become UART Input ... Here's how we read it

https://lupyuen.github.io/articles/serial?5#receive-uart

Sorry I had to rename "NuttX RTOS On PinePhone" because backwards it spells... 🙄

How we wait for #PinePhone's UART Port before we transmit

https://lupyuen.github.io/articles/serial?4#wait-to-transmit

Sending data to #PinePhone's UART Port is easy ... But we need to check the Transmit Buffer

https://lupyuen.github.io/articles/serial?3#transmit-uart

Here's how we send data to #PinePhone's UART Port

https://lupyuen.github.io/articles/serial?3#uart-with-polling

BASIC blinks the #PinePhone LEDs ... On Apache #NuttX RTOS 🤩

https://github.com/lupyuen/pinephone-nuttx#basic-blinks-the-leds

Here are the UART Registers for #PinePhone's Allwinner A64 SoC

https://lupyuen.github.io/articles/serial?2#uart-output

How #PinePhone talks UART with Interrupts ... And how it's implemented in #NuttX RTOS ... All shall be explained in this article

https://lupyuen.github.io/articles/serial?1

Each Arm64 Exception Level has its own Vector Table ... Here's how #NuttX RTOS loads the Arm64 Vector Table on #PinePhone

https://lupyuen.github.io/articles/interrupt?9#exception-levels

#NuttX RTOS lights up the #PinePhone LEDs ... And the Backlight too! 🎉

https://github.com/lupyuen/pinephone-nuttx#backlight-and-leds

What's an Arm64 Exception Level ... And why it matters for #PinePhone Interrupts

https://lupyuen.github.io/articles/interrupt?9#exception-levels

Checking our Arm64 Vector Table on #PinePhone ... Yep it's wrong! 🙄

https://lupyuen.github.io/articles/interrupt?8#arm64-vector-table-is-wrong

Inside the Arm64 Vector Table on #PinePhone

https://lupyuen.github.io/articles/interrupt?8#arm64-vector-table-is-wrong

Troubleshooting the Timer Interrupt on #PinePhone

https://lupyuen.github.io/articles/interrupt?7#timer-interrupt-isnt-handled

Why did the System Timer freeze #PinePhone? Let's find out!

https://lupyuen.github.io/articles/interrupt?6#pinephone-hangs-at-startup

Dumping the #QEMU Device Tree ... Reveals the address of Generic Interrupt Controller

https://lupyuen.github.io/articles/interrupt?5#test-pinephone-gic-with-qemu