From 199ad891ed762b1b39a8cf6122998ea4d532cee5 Mon Sep 17 00:00:00 2001
From: Michael Zill <michael.zill@gmail.com>
Date: Sat, 21 Aug 2021 13:22:18 +0200
Subject: [PATCH] Adafruit feather rp2040 (#91)

* added example for Feather RP2040
---
 boards/feather_rp2040/Cargo.toml              |  6 ++
 boards/feather_rp2040/README.md               |  1 +
 .../feather_rp2040/examples/feather_blinky.rs | 60 +++++++++++++++++++
 boards/feather_rp2040/src/lib.rs              |  4 +-
 4 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 boards/feather_rp2040/README.md
 create mode 100644 boards/feather_rp2040/examples/feather_blinky.rs

diff --git a/boards/feather_rp2040/Cargo.toml b/boards/feather_rp2040/Cargo.toml
index a5d694b..1dc534f 100644
--- a/boards/feather_rp2040/Cargo.toml
+++ b/boards/feather_rp2040/Cargo.toml
@@ -13,6 +13,12 @@ license = "MIT OR Apache-2.0"
 cortex-m = "0.7.2"
 rp2040-hal = { path = "../../rp2040-hal", version = "0.2.0"}
 cortex-m-rt = { version = "0.6.14", optional = true }
+embedded-time = "0.12.0"
+
+[dev-dependencies]
+panic-halt= "0.2.0"
+embedded-hal ="0.2.5"
+rp2040-boot2 = { git = "https://github.com/rp-rs/rp2040-boot2-rs",  rev = "d2128ef9875e91e454dd0fb0d747c7439ae0627b" }
 
 [features]
 default = ["rt"]
diff --git a/boards/feather_rp2040/README.md b/boards/feather_rp2040/README.md
new file mode 100644
index 0000000..320fbe4
--- /dev/null
+++ b/boards/feather_rp2040/README.md
@@ -0,0 +1 @@
+Adafruit Feather RP2040 Board Support Crate
diff --git a/boards/feather_rp2040/examples/feather_blinky.rs b/boards/feather_rp2040/examples/feather_blinky.rs
new file mode 100644
index 0000000..9bfda5d
--- /dev/null
+++ b/boards/feather_rp2040/examples/feather_blinky.rs
@@ -0,0 +1,60 @@
+//! Blinks the LED on a Adafruit Feather RP2040 board
+//!
+//! This will blink on-board LED.
+#![no_std]
+#![no_main]
+
+use cortex_m_rt::entry;
+use embedded_hal::digital::v2::OutputPin;
+use embedded_time::rate::*;
+use feather_rp2040::{
+    hal::{
+        clocks::{init_clocks_and_plls, Clock},
+        pac,
+        sio::Sio,
+        watchdog::Watchdog,
+    },
+    Pins, XOSC_CRYSTAL_FREQ,
+};
+use panic_halt as _;
+#[link_section = ".boot2"]
+#[used]
+pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER_GD25Q64CS;
+
+#[entry]
+fn main() -> ! {
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+
+    let mut watchdog = Watchdog::new(pac.WATCHDOG);
+
+    let clocks = init_clocks_and_plls(
+        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().integer());
+
+    let sio = Sio::new(pac.SIO);
+    let pins = Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+    let mut led_pin = pins.d13.into_push_pull_output();
+
+    loop {
+        led_pin.set_high().unwrap();
+        delay.delay_ms(1500);
+        led_pin.set_low().unwrap();
+        delay.delay_ms(1500);
+    }
+}
diff --git a/boards/feather_rp2040/src/lib.rs b/boards/feather_rp2040/src/lib.rs
index 6cf3c20..ec3f501 100644
--- a/boards/feather_rp2040/src/lib.rs
+++ b/boards/feather_rp2040/src/lib.rs
@@ -1,6 +1,6 @@
 #![no_std]
 
-extern crate rp2040_hal as hal;
+pub extern crate rp2040_hal as hal;
 
 #[cfg(feature = "rt")]
 extern crate cortex_m_rt;
@@ -54,3 +54,5 @@ hal::bsp_pins!(
     Gpio28 { name: a2 },
     Gpio29 { name: a3 },
 );
+
+pub const XOSC_CRYSTAL_FREQ: u32 = 12_000_000;