Add Pico Explorer board support

Cargo.toml

@@ -1,5 +1,6 @@
 [workspace]
 members = [
     "rp2040-hal",
-    "boards/feather_rp2040"
+    "boards/feather_rp2040",
+    "boards/pico_explorer",
 ]

boards/pico_explorer/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "pico_explorer"
+version = "0.1.0"
+authors = ["Hmvp <hmvp@users.noreply.github.com>"]
+edition = "2018"
+homepage = "https://github.com/rp-rs/rp-hal/boards/pico_explorer"
+description = "Board Support Package for the Pico Explorer"
+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 = "0.1.0" }
+cortex-m-rt = { version = "0.6.14", optional = true }
+
+[features]
+default = ["rt"]
+rt = ["cortex-m-rt"]

boards/pico_explorer/src/lib.rs

@@ -0,0 +1,97 @@
+#![no_std]
+
+extern crate 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: gpio0,
+        aliases: { FunctionPwm: Audio0 }
+    },
+    Gpio1 {
+        name: gpio1,
+        aliases: { FunctionPwm: Audio1 }
+    },
+    Gpio2 {
+        name: gpio2,
+        aliases: { FunctionPwm: Audio2 }
+    },
+    Gpio3 {
+        name: gpio3,
+        aliases: { FunctionPwm: Audio3 }
+    },
+    Gpio4 {
+        name: gpio4,
+        aliases: { FunctionPwm: Audio4 }
+    },
+    Gpio5 {
+        name: gpio5,
+        aliases: { FunctionPwm: Audio5 }
+    },
+    Gpio6 {
+        name: gpio6,
+        aliases: { FunctionPwm: Audio6 }
+    },
+    Gpio7 {
+        name: gpio7,
+        aliases: { FunctionPwm: Audio7 }
+    },
+    Gpio8 {
+        name: motor1_min,
+        aliases: { FunctionPwm: Motor1Min }
+    },
+    Gpio9 {
+        name: motor1_plus,
+        aliases: { FunctionPwm: Motor1Plus }
+    },
+    Gpio10 {
+        name: motor2_min,
+        aliases: { FunctionPwm: Motor2Min }
+    },
+    Gpio11 {
+        name: motor2_plus,
+        aliases: { FunctionPwm: Motor2Plus }
+    },
+    Gpio12 { name: switch_a },
+    Gpio13 { name: switch_b },
+    Gpio14 { name: switch_x },
+    Gpio15 { name: switch_y },
+    Gpio16 {
+        name: spi_miso,
+        aliases: { FunctionSpi: Miso }
+    },
+    Gpio17 {
+        name: lcd_cs,
+        aliases: { FunctionSpi: LcdCs }
+    },
+    Gpio18 {
+        name: spi_sclk,
+        aliases: { FunctionSpi: Sclk }
+    },
+    Gpio19 {
+        name: spi_mosi,
+        aliases: { FunctionSpi: Mosi }
+    },
+    Gpio20 {
+        name: i2c_sda,
+        aliases: { FunctionI2C: Sda }
+    },
+    Gpio21 {
+        name: i2c_scl,
+        aliases: { FunctionI2C: Scl }
+    },
+    Gpio22 {
+        name: i2c_int,
+        aliases: { FunctionI2C: Int }
+    },
+    Gpio25 { name: led },
+    Gpio26 { name: adc0 },
+    Gpio27 { name: adc1 },
+    Gpio28 { name: adc2 },
+);