rp: add initial version

1 files changed, 72 insertions, 0 deletions

diff --git a/embassy-rp-examples/src/main.rs b/embassy-rp-examples/src/main.rs
new file mode 100644
index 000000000..e1da77aa5
--- /dev/null
+++ b/embassy-rp-examples/src/main.rs
@@ -0,0 +1,72 @@
+#![no_std]
+#![no_main]
+#![feature(asm)]
+#![feature(min_type_alias_impl_trait)]
+#![feature(impl_trait_in_bindings)]
+#![feature(type_alias_impl_trait)]
+
+use core::sync::atomic::{AtomicUsize, Ordering};
+use defmt::{panic, *};
+use defmt_rtt as _;
+use embassy::executor::Spawner;
+use embassy::interrupt::InterruptExt;
+use embassy_rp::{dma, gpio, interrupt, uart, Peripherals};
+use embedded_hal::digital::v2::OutputPin;
+use panic_probe as _;
+use rp2040_pac2 as pac;
+
+#[link_section = ".boot2"]
+#[used]
+pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER;
+
+defmt::timestamp! {"{=u64}", {
+    static COUNT: AtomicUsize = AtomicUsize::new(0);
+    // NOTE(no-CAS) `timestamps` runs with interrupts disabled
+    let n = COUNT.load(Ordering::Relaxed);
+    COUNT.store(n + 1, Ordering::Relaxed);
+    n as u64
+}
+}
+
+#[embassy::main]
+async fn main(spanwer: Spawner) {
+    let p = unwrap!(Peripherals::take());
+
+    let mut config = uart::Config::default();
+    let mut uart = uart::Uart::new(p.UART0, p.PIN_0, p.PIN_1, p.PIN_2, p.PIN_3, config);
+    uart.send("Hello World!\r\n".as_bytes());
+
+    let mut led = gpio::Output::new(p.PIN_25, gpio::Level::Low);
+
+    let irq = interrupt::take!(DMA_IRQ_0);
+    unsafe {
+        //pac::DMA.inte0().write(|w| w.set_inte0(1 << 0));
+    }
+    irq.set_handler(dma_irq);
+    irq.unpend();
+    irq.enable();
+
+    let from: [u32; 4] = [1, 2, 3, 4];
+    let mut to: [u32; 4] = [9, 8, 7, 6];
+    info!("before dma: from = {:?}, to = {:?}", from, to);
+    cortex_m::asm::delay(4_000_000);
+    dma::Dma::copy(p.DMA_CH0, &from, &mut to);
+    cortex_m::asm::delay(4_000_000);
+    info!("after dma: from = {:?}, to = {:?}", from, to);
+
+    loop {
+        info!("led on!");
+        uart.send("ON!\r".as_bytes());
+        led.set_high().unwrap();
+        cortex_m::asm::delay(1_000_000);
+
+        info!("led off!");
+        uart.send("Off!\r".as_bytes());
+        led.set_low().unwrap();
+        cortex_m::asm::delay(4_000_000);
+    }
+}
+
+unsafe fn dma_irq(ctx: *mut ()) {
+    info!("DMA IRQ!");
+}