Full Code of MabezDev/xtensa-rust-quickstart for AI

Repository: MabezDev/xtensa-rust-quickstart
Branch: master
Commit: de46307dde75
Files: 12
Total size: 22.4 KB

Directory structure:
gitextract_4y1gwry8/

├── .cargo/
│   └── config
├── .gitignore
├── .vscode/
│   └── launch.json
├── Cargo.toml
├── LICENSE-APACHE
├── LICENSE-MIT
├── README.md
├── examples/
│   ├── esp32.rs
│   └── esp8266.rs
├── openocd.cfg
├── rust-toolchain
└── src/
    └── main.rs

================================================
FILE CONTENTS
================================================

================================================
FILE: .cargo/config
================================================


[target.xtensa-esp32-none-elf] # esp32
runner = "xtensa-esp32-elf-gdb -q -x openocd.gdb"
rustflags = [
  "-C", "link-arg=-Wl,-Tlink.x",
  "-C", "link-arg=-nostartfiles",
]

[target.xtensa-esp8266-none-elf] # esp8266
runner = "xtensa-lx106-elf-gdb -q -x openocd.gdb"
rustflags = [
  "-C", "link-arg=-Wl,-Tlink.x",
  "-C", "link-arg=-nostartfiles",
]



[build]
target = "xtensa-esp32-none-elf" # esp32
# target = "xtensa-esp8266-none-elf" # esp8266

[unstable]
build-std = ["core", "alloc"]

================================================
FILE: .gitignore
================================================
/target
**/*.rs.bk
Cargo.lock
.vscode/.cortex-debug.peripherals.state.json
.vscode/.cortex-debug.registers.state.json
core
svd/

================================================
FILE: .vscode/launch.json
================================================
{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "cwd": "${workspaceRoot}",
            "executable": "target/xtensa-esp32-none-elf/debug/esp32",
            "name": "debug-with-svd",
            "request": "attach",
            "type": "cortex-debug",
            "servertype": "openocd",
            "interface": "jtag",
            /* Download this from the latest `esp32` crate: https://docs.rs/esp32/latest/esp32/ */
            "svdFile": "svd/esp32.svd",
            // complains about not allowed, but it does work.. https://github.com/Marus/cortex-debug/issues/111#issuecomment-504778053
            "serverpath": "${env:HOME}/programs/openocd-esp32/bin/openocd",
            // for this to work you will have to run `ln -s xtensa-esp32-elf-gdb arm-none-eabi-gdb`
            "toolchainPath": "${env:HOME}/programs/xtensa-esp32-elf/bin",
            "configFiles": [
                "openocd.cfg"
            ],
        },
        {
            "type": "gdb",
            "request": "launch",
            "name": "Debug",
            "target": "target/xtensa-esp32-none-elf/debug/esp32",
            "gdbpath": "xtensa-esp32-elf-gdb",
            "cwd": "${workspaceRoot}",
            "autorun": [
                "source xtensa.gdb"
            ]
        },
        {
            "type": "gdb",
            "request": "launch",
            "name": "Release",
            "target": "target/xtensa-esp32-none-elf/release/esp32",
            "gdbpath": "xtensa-esp32-elf-gdb",
            "cwd": "${workspaceRoot}",
            "autorun": [
                "source xtensa.gdb"
            ]
        },
    ]
}

================================================
FILE: Cargo.toml
================================================
[package]
name = "xtensa-quickstart"
version = "0.1.0"
authors = ["Scott Mabin <scott@mabez.dev>"]
edition = "2018"

[dependencies]
xtensa-lx-rt = "0.7.0"
xtensa-lx = "0.4.0"
panic-halt = "0.2.0"

# because we cant have optional dev-deps, these must go here
esp32-hal = { version = "0.3.0", optional = true }
esp8266-hal = { version = "0.5.0", optional = true }

[[example]]
name = "esp32"
required-features = ["xtensa-lx-rt/lx6", "xtensa-lx/lx6", "esp32-hal"]

# [[example]]
# name = "esp8266"
# required-features = ["xtensa-lx-rt/lx106", "xtensa-lx/lx106", "esp8266-hal"]


================================================
FILE: LICENSE-APACHE
================================================
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================================================
FILE: README.md
================================================

# Rust on the xtensa architecture

⚠️ **NOTE**: This repo is now obsolete, there is now a quickstart repo for [bare-metal](https://github.com/esp-rs/esp-template) and a template for [using the standard library](https://github.com/esp-rs/esp-idf-template).

Need help? Join the esp-rs room on matrix, https://matrix.to/#/#esp-rs:matrix.org.

## Supported chips

|name|arch|rust-target| custom compiler required |
|-|-|-|-|
|esp32|Xtensa|`xtensa-esp32-none-elf`| yes |
|esp8266|Xtensa|`xtensa-esp8266-none-elf`| yes |

## Installing the compiler

For Xtensa targets a forked compiler must be installed, follow the instructions from [the book](https://esp-rs.github.io/book/getting-started/installing-rust.html).

## Installing tools

Currently the xtensa targets do not have LLD support. Therefore the GCC toolchain is required for linking.

### xtensa-esp32-elf toolchain for esp32 development

Instructions can be found [on Espressif's web site](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started-legacy/linux-setup.html#toolchain-setup) and the latest tool toolchain can be downloaded from [here](https://github.com/espressif/crosstool-NG/releases).

Extract it to the directory of your choice. Then add the toolchain's bin/ directory to your `$PATH`. For example:

    $ mkdir ~/esp
    $ tar -xzf ~/Downloads/xtensa-esp32-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz -C ~/esp
    $ PATH="$PATH:$HOME/esp/xtensa-esp32-elf/bin"

Old instructions can be found [on Espressif's web site](https://docs.espressif.com/projects/esp-idf/en/release-v3.0/get-started/linux-setup.html).

### xtensa-lx106-elf toolchain for esp8266 development
Install the xtensa-lx106-elf toolchain from the [espressif web site](https://docs.espressif.com/projects/esp8266-rtos-sdk/en/latest/get-started/linux-setup.html).

```
$ mkdir ~/esp
$ tar -xzf ~/Downloads/xtensa-lx106-elf-linux64-1.22.0-100-ge567ec7-5.2.0.tar.gz -C ~/esp
$ PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"
```

## Cargo Build

Since the introduction of the `build-std` feature of cargo, it is possible to build `core` without any additional tools.

## Flashing

Install espflash:

```bash
$ cargo install cargo-espflash
```

Example for the ESP32, remember to use `target = xtensa-esp32-none-elf` inside `.cargo/config`:

```bash
$ cargo espflash --chip esp32 --example esp32 --speed 460800 --features="xtensa-lx-rt/lx6,xtensa-lx/lx6,esp32-hal" /dev/ttyUSB0
```

Example for the ESP8266, remember to use `target = xtensa-esp8266-none-elf` inside `.cargo/config`:

```bash
$ cargo espflash --chip esp8266 --example esp8266 --features="xtensa-lx-rt/lx106 xtensa-lx/lx106 esp8266-hal" /dev/ttyUSB0
```

### esptool

The preferred method of flashing is to use
[`cargo-espflash`](https://github.com/icewind1991/espflash), but you can use Espressif's `esptool.py` to flash the binaries manually. Esptool is python-based command line tool for flashing Espressif's chips. Full installation instructions are available on [the website](https://github.com/espressif/esptool).

## License

Licensed under either of

- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
  http://www.apache.org/licenses/LICENSE-2.0)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)

at your option.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.


================================================
FILE: examples/esp32.rs
================================================
#![no_std]
#![no_main]

use esp32_hal::target;
use hal::prelude::*;
use xtensa_lx::timer::delay;
use panic_halt as _;
use esp32_hal as hal;

/// The default clock source is the onboard crystal
/// In most cases 40mhz (but can be as low as 2mhz depending on the board)
const CORE_HZ: u32 = 40_000_000;

const WDT_WKEY_VALUE: u32 = 0x50D83AA1;

#[entry]
fn main() -> ! {
    let dp = target::Peripherals::take().expect("Failed to obtain Peripherals");

    let mut rtccntl = dp.RTCCNTL;
    let mut timg0 = dp.TIMG0;
    let mut timg1 = dp.TIMG1;

    // (https://github.com/espressif/openocd-esp32/blob/97ba3a6bb9eaa898d91df923bbedddfeaaaf28c9/src/target/esp32.c#L431)
    // openocd disables the wdt's on halt
    // we will do it manually on startup
    disable_timg_wdts(&mut timg0, &mut timg1);
    disable_rtc_wdt(&mut rtccntl);

    let pins = dp.GPIO.split();
    let mut led = pins.gpio2.into_push_pull_output();

    loop {
        led.set_high().unwrap();
        delay(CORE_HZ);
        led.set_low().unwrap();
        delay(CORE_HZ);
    }
}

fn disable_rtc_wdt(rtccntl: &mut target::RTCCNTL) {
    /* Disables the RTCWDT */
    rtccntl
        .wdtwprotect
        .write(|w| unsafe { w.bits(WDT_WKEY_VALUE) });
    rtccntl.wdtconfig0.modify(|_, w| unsafe {
        w.wdt_stg0()
            .bits(0x0)
            .wdt_stg1()
            .bits(0x0)
            .wdt_stg2()
            .bits(0x0)
            .wdt_stg3()
            .bits(0x0)
            .wdt_flashboot_mod_en()
            .clear_bit()
            .wdt_en()
            .clear_bit()
    });
    rtccntl.wdtwprotect.write(|w| unsafe { w.bits(0x0) });
}

fn disable_timg_wdts(timg0: &mut target::TIMG0, timg1: &mut target::TIMG1) {
    timg0
        .wdtwprotect
        .write(|w| unsafe { w.bits(WDT_WKEY_VALUE) });
    timg1
        .wdtwprotect
        .write(|w| unsafe { w.bits(WDT_WKEY_VALUE) });

    timg0.wdtconfig0.write(|w| unsafe { w.bits(0x0) });
    timg1.wdtconfig0.write(|w| unsafe { w.bits(0x0) });
}


================================================
FILE: examples/esp8266.rs
================================================
#![no_std]
#![no_main]

use panic_halt as _;
use esp8266_hal::prelude::*;
use esp8266_hal::target::Peripherals;

#[entry]
fn main() -> ! {
    let dp = Peripherals::take().unwrap();
    let pins = dp.GPIO.split();
    let mut led = pins.gpio2.into_push_pull_output();
    let (mut timer1, _) = dp.TIMER.timers();

    led.set_high().unwrap();

    loop {
        timer1.delay_ms(500);
        led.toggle().unwrap();
    }
}


================================================
FILE: openocd.cfg
================================================


source [find interface/jlink.cfg]

source [find board/esp-wroom-32.cfg]

gdb_memory_map disable

set ESP32_RTOS none

# set ESP32_ONLYCPU 0

================================================
FILE: rust-toolchain
================================================
esp

================================================
FILE: src/main.rs
================================================
//! NOTE: The following instructions are for building a custom Xtensa target, for the esp32 and esp8266
//! see the examples/ folder. 
//!
//! Building for a custom target:
//!   - fill out a `memory.x` file
//!   - Create a build.rs
//!   - Choose a `xtensa-lx` and `xtensa-lx-rt` cpu feature
//! 
//! Example `memory.x` (also see the ESP hals)
//! ```
//! /* 
//! Specify main memory areas
//!     These are generic ones, which will need to be filled in for your
//!     device.
//! 
//!     The espXX-hal crates will handle this for you. Only use this if you're targeting
//!     another xtensa target.
//! */
//! MEMORY
//! {
//!   vectors_seg ( RX )     : ORIGIN = 0x40080000, len =  1k /* SRAM0 */
//!   iram_seg ( RX )        : ORIGIN = 0x40080400, len = 128k-0x400 /* SRAM0 */
//!   dram_seg ( RW )        : ORIGIN = 0x3FFB0000, len = 176k
//! }
//! 
//! REGION_ALIAS("ROTEXT", iram_seg); /* these alias' link up with `xtensa-lx-rt` */
//! REGION_ALIAS("RWTEXT", iram_seg);
//! REGION_ALIAS("RODATA", dram_seg);
//! REGION_ALIAS("RWDATA", dram_seg);
//! ```
//! 
//! Example `build.rs`
//! ```
//! use std::env;
//! use std::fs::File;
//! use std::io::Write;
//! use std::path::PathBuf;
//! 
//! 
//! 
//! fn main() {
//!     // Put the linker script somewhere the linker can find it
//!     let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
//! 
//!     File::create(out.join("memory.x"))
//!         .unwrap()
//!         .write_all(include_bytes!("memory.x.in"))
//!         .unwrap();
//! 
//!     println!("cargo:rustc-link-search={}", out.display());
//!     // Only re-run the build script when memory.x is changed,
//!     // instead of when any part of the source code changes.
//!     println!("cargo:rerun-if-changed=memory.x");
//! }
//! ```

#![no_std]
#![no_main]

use xtensa_lx_rt as _;
use xtensa_lx_rt::entry;
use panic_halt as _;


#[entry]
fn main() -> ! {
    loop {}
}