Add Framework LED Matrix Example

Signed-off-by: Daniel Schaefer <[email protected]>

.github/workflows/build.yml

@@ -26,8 +26,8 @@ jobs:
       - if: steps.changes.outputs.rust == 'true'
         run: |
           cargo build --target=thumbv6m-none-eabi
-          cd examples/adafruit_rgb
-          cargo build --target=thumbv6m-none-eabi
+          cd examples/adafruit_rgb && cargo build --target=thumbv6m-none-eabi
+          cd examples/ledmatrix && cargo build --examples
 
   rustdoc:
     runs-on: ubuntu-latest

Makefile

@@ -1,3 +1,5 @@
 build-all:
 	cd examples/adafruit_rgb && \
 	  cargo build --target=thumbv6m-none-eabi --examples --all-features
+	cd examples/ledmatrix && \
+	  cargo build --target=thumbv6m-none-eabi --examples --all-features

README.md

@@ -12,7 +12,6 @@ Driver for [Lumissil Microsystem's IS31FL3741 integrated circuit](https://www.lu
 1. Use of embedded HAL traits (works with any embedded device that supports the required traits). This means that this driver is platform agnostic.
 2. Library features (only turn on what devices you need to save compiled binary space).
 3. [Examples](./examples) on how to use this driver.
-Right now there is only an example on how to use this crate with a stm32 nucleo.
 
 ## Install
 

examples/ledmatrix/.cargo/config.toml

@@ -0,0 +1,20 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+runner = "elf2uf2-rs -d"
+
+rustflags = [
+  "-C", "linker=flip-link",
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tlink.x",
+
+  # Code-size optimizations.
+  #   trap unreachable can save a lot of space, but requires nightly compiler.
+  #   uncomment the next line if you wish to enable it
+  # "-Z", "trap-unreachable=no",
+  "-C", "no-vectorize-loops",
+]
+
+[build]
+target = "thumbv6m-none-eabi"
+
+[env]
+DEFMT_LOG = "debug"

examples/ledmatrix/Cargo.toml

@@ -0,0 +1,16 @@
+[package] 
+name = "ledmatrix"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+is31fl3741 = { path = "../../", features = ["framework_ledmatrix"] }
+embedded-hal = "0.2.7"
+cortex-m-rt = "0.7.3"
+cortex-m = "0.7.7"
+fugit = "0.3.7"
+rp2040-hal = { version = "0.8", features = ["rt", "critical-section-impl"] }
+rp-pico = "0.7"
+rp2040-panic-usb-boot = "0.5.0"
+rp2040-boot2 = "0.3"

examples/ledmatrix/README.md

@@ -0,0 +1,10 @@
+# Framework LED Matrix
+
+## Build and run
+
+Make sure you're in bootloader mode and then run the following command, which
+automatically flashes the matrix.
+
+```
+cargo run --example ledtest
+```

examples/ledmatrix/build.rs

@@ -0,0 +1,31 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+}

examples/ledmatrix/examples/ledtest.rs

@@ -0,0 +1,133 @@
+//! LED Matrix Module
+//!
+//!
+//!
+//! Goes into bootloader mode when the host is asleep. This is to make it easy to reflash your
+//! firmware - the regular bootloader mechanism using the DIP switch still works.
+#![no_std]
+#![no_main]
+#![allow(clippy::needless_range_loop)]
+
+use embedded_hal::digital::v2::{InputPin, OutputPin};
+use rp2040_hal::rom_data::reset_to_usb_boot;
+use rp2040_panic_usb_boot as _;
+
+/// Maximum brightness out of 255
+///
+/// 100/255 results in 250mA current draw and is plenty bright.
+///  50/255 results in 160mA current draw and is plenty bright.
+const MAX_BRIGHTNESS: u8 = 50;
+
+// Provide an alias for our BSP so we can switch targets quickly.
+// Uncomment the BSP you included in Cargo.toml, the rest of the code does not need to change.
+use bsp::entry;
+use is31fl3741::devices::{LedMatrix, CALC_PIXEL};
+use is31fl3741::{PwmFreq};
+use rp_pico as bsp;
+
+use bsp::hal::{
+    clocks::{init_clocks_and_plls, Clock},
+    gpio, pac,
+    sio::Sio,
+    watchdog::Watchdog,
+};
+use fugit::RateExtU32;
+
+#[entry]
+fn main() -> ! {
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+    let mut watchdog = Watchdog::new(pac.WATCHDOG);
+    let sio = Sio::new(pac.SIO);
+
+    let clocks = init_clocks_and_plls(
+        bsp::XOSC_CRYSTAL_FREQ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+    let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
+
+    let pins = bsp::Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    // Enable LED controller
+    // SDB - Gpio29
+    let mut led_enable = pins.voltage_monitor.into_push_pull_output();
+    led_enable.set_high().unwrap();
+    // INTB. Currently ignoring
+    pins.gpio28.into_floating_input();
+
+    let i2c = bsp::hal::I2C::i2c1(
+        pac.I2C1,
+        pins.gpio26.into_mode::<gpio::FunctionI2C>(),
+        pins.gpio27.into_mode::<gpio::FunctionI2C>(),
+        // 1000,
+        1000.kHz(),
+        &mut pac.RESETS,
+        &clocks.peripheral_clock,
+    );
+
+    // Gpio25 (LED on rp-pico)
+    let dip1 = pins.led.into_pull_up_input();
+    let _dip1_state = dip1.is_low().unwrap();
+
+    // Detect whether the sleep pin is connected
+    // Early revisions of the hardware didn't have it wired up, if that is the
+    // case we have to ignore its state.
+    let mut sleep_present = false;
+    let sleep = pins.gpio0.into_pull_up_input();
+    if sleep.is_low().unwrap() {
+        sleep_present = true;
+    }
+    let sleep = sleep.into_pull_down_input();
+    if sleep.is_high().unwrap() {
+        sleep_present = true;
+    }
+
+    let mut matrix = LedMatrix::new(i2c, CALC_PIXEL);
+    matrix
+        .setup(&mut delay)
+        .expect("failed to setup RGB controller");
+
+    // Enable only the SW pins that we're using.
+    // Otherwise driving the unused pins might result in audible noise.
+    matrix
+        .device
+        .sw_enablement(is31fl3741::SwSetting::Sw1Sw8)
+        .unwrap();
+
+    matrix
+        .set_scaling(MAX_BRIGHTNESS)
+        .expect("failed to set scaling");
+
+    matrix.device.set_pwm_freq(PwmFreq::P29k).unwrap();
+
+    loop {
+        // Light up each LED, one by one
+        for y in 0..matrix.device.height {
+            for x in 0..matrix.device.width {
+                matrix
+                    .device
+                    .pixel(x, y, 0xFF)
+                    .expect("couldn't turn on");
+                delay.delay_ms(100);
+                matrix.device.pixel(x, y, 0).expect("couldn't turn off");
+
+                // Reset into bootloader if system asleep
+                if sleep_present && sleep.is_low().unwrap(){
+                    reset_to_usb_boot(0, 0);
+                }
+            }
+        }
+    }
+}

examples/ledmatrix/memory.x

@@ -0,0 +1,15 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+    RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+EXTERN(BOOT2_FIRMWARE)
+
+SECTIONS {
+    /* ### Boot loader */
+    .boot2 ORIGIN(BOOT2) :
+    {
+        KEEP(*(.boot2));
+    } > BOOT2
+} INSERT BEFORE .text;

examples/ledmatrix/src/lib.rs

@@ -0,0 +1 @@
+#![no_std]