rename `rp23` (?) folder to `rp235x`; fix `ci.sh` to use `rp235x` folder

1 files changed, 49 insertions, 0 deletions

diff --git a/examples/rp235x/src/bin/pio_stepper.rs b/examples/rp235x/src/bin/pio_stepper.rs
new file mode 100644
index 000000000..3862c248b
--- /dev/null
+++ b/examples/rp235x/src/bin/pio_stepper.rs
@@ -0,0 +1,49 @@
+//! This example shows how to use the PIO module in the RP2040 to implement a stepper motor driver
+//! for a 5-wire stepper such as the 28BYJ-48. You can halt an ongoing rotation by dropping the future.
+
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_rp::bind_interrupts;
+use embassy_rp::peripherals::PIO0;
+use embassy_rp::pio::{InterruptHandler, Pio};
+use embassy_rp::pio_programs::stepper::{PioStepper, PioStepperProgram};
+use embassy_time::{with_timeout, Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    PIO0_IRQ_0 => InterruptHandler<PIO0>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    let Pio {
+        mut common, irq0, sm0, ..
+    } = Pio::new(p.PIO0, Irqs);
+
+    let prg = PioStepperProgram::new(&mut common);
+    let mut stepper = PioStepper::new(&mut common, sm0, irq0, p.PIN_4, p.PIN_5, p.PIN_6, p.PIN_7, &prg);
+    stepper.set_frequency(120);
+    loop {
+        info!("CW full steps");
+        stepper.step(1000).await;
+
+        info!("CCW full steps, drop after 1 sec");
+        if with_timeout(Duration::from_secs(1), stepper.step(-i32::MAX))
+            .await
+            .is_err()
+        {
+            info!("Time's up!");
+            Timer::after(Duration::from_secs(1)).await;
+        }
+
+        info!("CW half steps");
+        stepper.step_half(1000).await;
+
+        info!("CCW half steps");
+        stepper.step_half(-1000).await;
+    }
+}