Initial rp235x support

Examples have been run, but there is not yet a test suite.

1 files changed, 40 insertions, 0 deletions

diff --git a/examples/rp23/src/bin/uart.rs b/examples/rp23/src/bin/uart.rs
new file mode 100644
index 000000000..7b82fa350
--- /dev/null
+++ b/examples/rp23/src/bin/uart.rs
@@ -0,0 +1,40 @@
+//! This example shows how to use UART (Universal asynchronous receiver-transmitter) in the RP2040 chip.
+//!
+//! No specific hardware is specified in this example. Only output on pin 0 is tested.
+//! The Raspberry Pi Debug Probe (https://www.raspberrypi.com/products/debug-probe/) could be used
+//! with its UART port.
+
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+use embassy_rp::uart;
+use {defmt_rtt as _, panic_probe as _};
+use embassy_rp::block::ImageDef;
+
+#[link_section = ".start_block"]
+#[used]
+pub static IMAGE_DEF: ImageDef = ImageDef::secure_exe();
+
+// Program metadata for `picotool info`
+#[link_section = ".bi_entries"]
+#[used]
+pub static PICOTOOL_ENTRIES: [embassy_rp::binary_info::EntryAddr; 4] = [
+    embassy_rp::binary_info_rp_cargo_bin_name!(),
+    embassy_rp::binary_info_rp_cargo_version!(),
+    embassy_rp::binary_info_rp_program_description!(c"Blinky"),
+    embassy_rp::binary_info_rp_program_build_attribute!(),
+];
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    let config = uart::Config::default();
+    let mut uart = uart::Uart::new_blocking(p.UART1, p.PIN_4, p.PIN_5, config);
+    uart.blocking_write("Hello World!\r\n".as_bytes()).unwrap();
+
+    loop {
+        uart.blocking_write("hello there!\r\n".as_bytes()).unwrap();
+        cortex_m::asm::delay(1_000_000);
+    }
+}