moved project to blinky

4 files changed, 178 insertions, 0 deletions

diff --git a/blinky/.cargo/config.toml b/blinky/.cargo/config.toml
new file mode 100644
index 0000000..5234c74
--- /dev/null
+++ b/blinky/.cargo/config.toml
@@ -0,0 +1,40 @@
+#
+# Cargo Configuration for the https://github.com/rp-rs/rp-hal.git repository.
+#
+# Copyright (c) The RP-RS Developers, 2021
+#
+# You might want to make a similar file in your own repository if you are
+# writing programs for Raspberry Silicon microcontrollers.
+#
+# This file is MIT or Apache-2.0 as per the repository README.md file
+#
+
+[build]
+# Set the default target to match the Cortex-M0+ in the RP2040
+target = "thumbv6m-none-eabi"
+
+# Target specific options
+[target.thumbv6m-none-eabi]
+# Pass some extra options to rustc, some of which get passed on to the linker.
+#
+# * linker argument --nmagic turns off page alignment of sections (which saves
+#   flash space)
+# * linker argument -Tlink.x tells the linker to use link.x as the linker
+#   script. This is usually provided by the cortex-m-rt crate, and by default
+#   the version in that crate will include a file called `memory.x` which
+#   describes the particular memory layout for your specific chip. 
+# * no-vectorize-loops turns off the loop vectorizer (seeing as the M0+ doesn't
+#   have SIMD)
+rustflags = [
+    "-C", "link-arg=--nmagic",
+    "-C", "link-arg=-Tlink.x",
+    "-C", "no-vectorize-loops",
+]
+
+# This runner will make a UF2 file and then copy it to a mounted RP2040 in USB
+# Bootloader mode:
+runner = "elf2uf2-rs -d"
+
+# This runner will find a supported SWD debug probe and flash your RP2040 over
+# SWD:
+# runner = "probe-rs run --chip RP2040"
\ No newline at end of file
diff --git a/blinky/Cargo.toml b/blinky/Cargo.toml
new file mode 100644
index 0000000..6ea7014
--- /dev/null
+++ b/blinky/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "picofirst"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+cortex-m = "0.7.7"
+cortex-m-rt = "0.7.5"
+embedded-hal = "1.0.0"
+panic-halt = "1.0.0"
+rp-pico = "0.9.0"
diff --git a/blinky/memory.x b/blinky/memory.x
new file mode 100644
index 0000000..070eac7
--- /dev/null
+++ b/blinky/memory.x
@@ -0,0 +1,15 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+    RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+EXTERN(BOOT2_FIRMWARE)
+
+SECTIONS {
+    /* ### Boot loader */
+    .boot2 ORIGIN(BOOT2) :
+    {
+        KEEP(*(.boot2));
+    } > BOOT2
+} INSERT BEFORE .text;
\ No newline at end of file
diff --git a/blinky/src/main.rs b/blinky/src/main.rs
new file mode 100644
index 0000000..c027b11
--- /dev/null
+++ b/blinky/src/main.rs
@@ -0,0 +1,112 @@
+//! # Pico Blinky Example
+//!
+//! Blinks the LED on a Pico board.
+//!
+//! This will blink an LED attached to GP25, which is the pin the Pico uses for
+//! the on-board LED.
+//!
+//! See the `Cargo.toml` file for Copyright and license details.
+
+#![no_std]
+#![no_main]
+
+// The macro for our start-up function
+use rp_pico::entry;
+
+// GPIO traits
+use embedded_hal::digital::OutputPin;
+
+// Ensure we halt the program on panic (if we don't mention this crate it won't
+// be linked)
+use panic_halt as _;
+
+// Pull in any important traits
+use rp_pico::hal::prelude::*;
+
+// A shorter alias for the Peripheral Access Crate, which provides low-level
+// register access
+use rp_pico::hal::pac;
+
+// A shorter alias for the Hardware Abstraction Layer, which provides
+// higher-level drivers.
+use rp_pico::hal;
+
+fn is_prime (a : u64) -> bool {
+    if a % 2 == 0 {return false};
+    for i in (3..a.isqrt()).step_by(2) {
+        if a % i == 0 {
+            return false;
+        }
+    }
+    return true;
+}
+
+fn find_next_smaller_prime(mut x : u64) -> u64 {
+    if x <= 1 {return x};
+    if x % 2 == 0 {x=x-1};
+    while !is_prime(x) {x = x - 2};
+    return x;
+}
+
+/// Entry point to our bare-metal application.
+///
+/// The `#[entry]` macro ensures the Cortex-M start-up code calls this function
+/// as soon as all global variables are initialised.
+///
+/// The function configures the RP2040 peripherals, then blinks the LED in an
+/// infinite loop.
+#[entry]
+fn main() -> ! {
+    // Grab our singleton objects
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+
+    // Set up the watchdog driver - needed by the clock setup code
+    let mut watchdog = hal::Watchdog::new(pac.WATCHDOG);
+
+    // Configure the clocks
+    //
+    // The default is to generate a 125 MHz system clock
+    let clocks = hal::clocks::init_clocks_and_plls(
+        rp_pico::XOSC_CRYSTAL_FREQ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+
+    // The delay object lets us wait for specified amounts of time (in
+    // milliseconds)
+    let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
+
+    // The single-cycle I/O block controls our GPIO pins
+    let sio = hal::Sio::new(pac.SIO);
+
+    // Set the pins up according to their function on this particular board
+    let pins = rp_pico::Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    // Set the LED to be an output
+    let mut led_pin = pins.led.into_push_pull_output();
+
+    // Blink the LED at 1 Hz
+    loop {
+        led_pin.set_high().unwrap();
+        delay.delay_ms(500);
+        if find_next_smaller_prime(1<<36) > 5 {
+            led_pin.set_high().unwrap();
+        }
+        led_pin.set_low().unwrap();
+        delay.delay_ms(500);
+    }
+}
+
+// End of file
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