From 63dd0b3066b9d56c1f3de34515f78fe02af7f6d9 Mon Sep 17 00:00:00 2001
From: Wilfried Chauveau <wilfried.chauveau@ithinuel.me>
Date: Thu, 16 Sep 2021 07:16:20 +0100
Subject: [PATCH] add Pro Micro rainbow example (uses PIO & Timer's Countdown)
---
Cargo.toml | 1 +
boards/pro_micro_rp2040/Cargo.toml | 29 +++++++
.../examples/pro_micro_rainbow.rs | 87 +++++++++++++++++++
boards/pro_micro_rp2040/src/lib.rs | 34 ++++++++
4 files changed, 151 insertions(+)
create mode 100644 boards/pro_micro_rp2040/Cargo.toml
create mode 100644 boards/pro_micro_rp2040/examples/pro_micro_rainbow.rs
create mode 100644 boards/pro_micro_rp2040/src/lib.rs
diff --git a/Cargo.toml b/Cargo.toml
index d89057d..f7adced 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,5 @@ members = [
"boards/pico_explorer",
"boards/pico_lipo_16mb",
"boards/adafruit_macropad",
+ "boards/pro_micro_rp2040",
]
diff --git a/boards/pro_micro_rp2040/Cargo.toml b/boards/pro_micro_rp2040/Cargo.toml
new file mode 100644
index 0000000..9e9a002
--- /dev/null
+++ b/boards/pro_micro_rp2040/Cargo.toml
@@ -0,0 +1,29 @@
+[package]
+name = "pro_micro_rp2040"
+version = "0.1.0"
+authors = ["Wilfried Chauveau <wilfried.chauveau@ithinuel.me>"]
+edition = "2018"
+homepage = "https://github.com/rp-rs/rp-hal/boards/pro_micro_rp2040"
+description = "Board Support Package for the Sparkfun Pro Micro RP2040"
+license = "MIT OR Apache-2.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cortex-m = "0.7.2"
+rp2040-hal = { path = "../../rp2040-hal", version = "0.2.0" }
+cortex-m-rt = { version = "0.7.0", optional = true }
+embedded-hal = { version = "0.2.4", features = ["unproven"] }
+
+[features]
+default = ["rt"]
+rt = ["cortex-m-rt", "rp2040-hal/rt"]
+
+[dev-dependencies]
+panic-halt = "0.2.0"
+rp2040-boot2 = { git = "https://github.com/rp-rs/rp2040-boot2-rs", rev = "67400f600b192e950b58df79ddc9b57ff209ef08" }
+smart-leds = "0.3.0"
+embedded-time = "0.12.0"
+nb = "1.0.0"
+pio = { git = "https://github.com/rp-rs/pio-rs.git", branch = "main" }
+ws2812-pio = { git = "https://github.com/ithinuel/ws2812-pio-rs" }
diff --git a/boards/pro_micro_rp2040/examples/pro_micro_rainbow.rs b/boards/pro_micro_rp2040/examples/pro_micro_rainbow.rs
new file mode 100644
index 0000000..2af9c7b
--- /dev/null
+++ b/boards/pro_micro_rp2040/examples/pro_micro_rainbow.rs
@@ -0,0 +1,87 @@
+//! Cycles colors on on the on board addressable LED.
+#![no_std]
+#![no_main]
+
+use core::iter::once;
+use cortex_m_rt::entry;
+use embedded_hal::timer::CountDown;
+use embedded_time::duration::Extensions;
+use panic_halt as _;
+
+use pro_micro_rp2040::{
+ hal::{
+ clocks::{init_clocks_and_plls, Clock},
+ gpio::{FunctionPio0, Pin},
+ pac,
+ sio::Sio,
+ timer::Timer,
+ watchdog::Watchdog,
+ },
+ XOSC_CRYSTAL_FREQ,
+};
+use smart_leds::{brightness, SmartLedsWrite, RGB8};
+use ws2812_pio::Ws2812;
+
+#[link_section = ".boot2"]
+#[used]
+pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER;
+
+#[entry]
+fn main() -> ! {
+ let mut pac = pac::Peripherals::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 sio = Sio::new(pac.SIO);
+ let pins = pro_micro_rp2040::Pins::new(
+ pac.IO_BANK0,
+ pac.PADS_BANK0,
+ sio.gpio_bank0,
+ &mut pac.RESETS,
+ );
+ let _led: Pin<_, FunctionPio0> = pins.led.into_mode();
+ let timer = Timer::new(pac.TIMER);
+ let mut delay = timer.count_down();
+
+ let mut ws = Ws2812::new(
+ 25,
+ pac.PIO0,
+ &mut pac.RESETS,
+ clocks.system_clock.freq(),
+ timer.count_down(),
+ );
+
+ let mut n: u8 = 128;
+ loop {
+ ws.write(brightness(once(wheel(n)), 32)).unwrap();
+ n = n.wrapping_add(1);
+
+ delay.start(25.milliseconds());
+ let _ = nb::block!(delay.wait());
+ }
+}
+/// Input a value 0 to 255 to get a color value
+/// The colours are a transition r - g - b - back to r.
+fn wheel(mut wheel_pos: u8) -> RGB8 {
+ wheel_pos = 255 - wheel_pos;
+ if wheel_pos < 85 {
+ return (255 - wheel_pos * 3, 0, wheel_pos * 3).into();
+ }
+ if wheel_pos < 170 {
+ wheel_pos -= 85;
+ return (0, wheel_pos * 3, 255 - wheel_pos * 3).into();
+ }
+ wheel_pos -= 170;
+ (wheel_pos * 3, 255 - wheel_pos * 3, 0).into()
+}
diff --git a/boards/pro_micro_rp2040/src/lib.rs b/boards/pro_micro_rp2040/src/lib.rs
new file mode 100644
index 0000000..e7dd0db
--- /dev/null
+++ b/boards/pro_micro_rp2040/src/lib.rs
@@ -0,0 +1,34 @@
+#![no_std]
+
+pub use rp2040_hal as hal;
+#[cfg(feature = "rt")]
+extern crate cortex_m_rt;
+#[cfg(feature = "rt")]
+pub use cortex_m_rt::entry;
+
+pub use hal::pac;
+
+hal::bsp_pins!(
+ Gpio0 { name: tx0 },
+ Gpio1 { name: rx0 },
+ Gpio2 { name: gpio2 },
+ Gpio3 { name: gpio3 },
+ Gpio4 { name: gpio4 },
+ Gpio5 { name: gpio5 },
+ Gpio6 { name: gpio6 },
+ Gpio7 { name: gpio7 },
+ Gpio8 { name: tx1 },
+ Gpio9 { name: rx1 },
+ Gpio16 { name: sda },
+ Gpio17 { name: scl },
+ Gpio20 { name: cipo },
+ Gpio21 { name: ncs },
+ Gpio22 { name: sck },
+ Gpio25 { name: led },
+ Gpio26 { name: adc0 },
+ Gpio27 { name: adc1 },
+ Gpio28 { name: adc2 },
+ Gpio29 { name: adc3 },
+);
+
+pub const XOSC_CRYSTAL_FREQ: u32 = 12_000_000;