firmware for my Touchscreen E-Paper Input Module for Framework Laptop 16
fw16-epd-main: global serial number
author
arthomnix
date
(Jan 12, 2025, 6:15 PM UTC)
commit
de04cc65
de04cc65d0c6f80dfcec3d6358f15df4e218ce00
parent
23b73e75
23b73e75863b0d908927676479754469a356786e
+29
-16
+28
-16
fw16-epd-main/src/main.rs
+28
-16
fw16-epd-main/src/main.rs
···
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#[allow(unused_imports)]
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use defmt_rtt as _;
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use core::cell::RefCell;
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use core::cell::{RefCell, UnsafeCell};
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use critical_section::Mutex;
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use defmt::{debug, info, trace, warn};
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use embedded_hal::digital::{InputPin, OutputPin, PinState};
···
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use mcp9808::reg_conf::{Configuration, ShutdownMode};
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use mcp9808::reg_res::ResolutionVal;
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use mcp9808::reg_temp_generic::ReadableTempRegister;
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use portable_atomic::{AtomicBool, AtomicU8};
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use portable_atomic::{AtomicBool, AtomicU128, AtomicU8};
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use portable_atomic::Ordering;
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use usb_device::bus::UsbBusAllocator;
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use usb_device::prelude::*;
···
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use fw16_epd_bsp::hal::gpio::Interrupt::{EdgeHigh, EdgeLow};
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use fw16_epd_bsp::hal::multicore::{Multicore, Stack};
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use fw16_epd_bsp::hal::timer::{Alarm, Alarm0};
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use fw16_epd_bsp::pac::{CorePeripherals, I2C0};
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use fw16_epd_bsp::pac::I2C0;
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use fw16_epd_bsp::pac::interrupt;
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use fw16_epd_gui::draw_target::EpdDrawTarget;
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use fw16_epd_program_interface::{SafeOption, TouchEvent, TouchEventType};
···
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static mut GLOBAL_USB_BUS: Option<UsbBusAllocator<hal::usb::UsbBus>> = None;
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static mut GLOBAL_USB_SERIAL: Option<SerialPort<hal::usb::UsbBus>> = None;
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static mut SERIAL_NUMBER: [u8; 16] = [b'X'; 16];
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static TOUCH_EVENT_BUFFER: Mutex<RefCell<TouchEventBuffer>> = Mutex::new(RefCell::new(TouchEventBuffer::new()));
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static TOUCH_ENABLED: AtomicBool = AtomicBool::new(false);
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···
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}
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}
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// Safety: The only time a mutable reference to SERIAL_NUMBER is created is right
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// at the start of the program when the serial number is read from the flash. This
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// function must never be called before then.
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#[allow(static_mut_refs)]
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extern "C" fn serial_number() -> &'static [u8; 16] {
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unsafe { &SERIAL_NUMBER }
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}
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struct TouchEventBuffer<const SIZE: usize = 32> {
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inner: [TouchEvent; SIZE],
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read_index: usize,
···
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let mut id = [0u8; 8];
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unsafe { rp2040_flash::flash::flash_unique_id(&mut id, true) };
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let mut id = u64::from_be_bytes(id);
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let mut serial_no = [0u8; 16];
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for c in serial_no.iter_mut().rev() {
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let nibble = (id & 0x0f) as u8;
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*c = match nibble {
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0x0..=0x9 => b'0' + nibble,
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0xa..=0xf => b'A' + nibble - 0xa,
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_ => unreachable!(),
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};
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id >>= 4;
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unsafe {
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// Safety: This is the only place we modify SERIAL_NUMBER, and this is before any
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// shared references are created
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#[allow(static_mut_refs)]
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for c in SERIAL_NUMBER.iter_mut().rev() {
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let nibble = (id & 0x0f) as u8;
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*c = match nibble {
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0x0..=0x9 => b'0' + nibble,
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0xa..=0xf => b'A' + nibble - 0xa,
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_ => unreachable!(),
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};
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id >>= 4;
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}
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}
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// Safety: this function never returns, so we should be fine right?
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let serial_no: &'static str = unsafe { &*&raw const *core::str::from_utf8(&serial_no).unwrap() };
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unsafe { cortex_m::interrupt::enable() };
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info!("Framework 16 EPD firmware version {}, serial no. {}", env!("CARGO_PKG_VERSION"), serial_no);
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info!("Framework 16 EPD firmware version {}, serial no. {}", env!("CARGO_PKG_VERSION"), unsafe { core::str::from_utf8_unchecked(serial_number()) });
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let mut sio = Sio::new(pac.SIO);
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let pins = Pins::new(
···
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.strings(&[StringDescriptors::default()
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.manufacturer("arthomnix")
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.product("Touchscreen EPD Input Module for Framework 16")
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.serial_number(serial_no)
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.serial_number(unsafe { core::str::from_utf8_unchecked(serial_number()) })
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])
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.unwrap()
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.device_class(usbd_serial::USB_CLASS_CDC)
+1
fw16-epd-program-interface/src/lib.rs
+1
fw16-epd-program-interface/src/lib.rs