nxp: Add mimxrt1062 support

The examples in this case are designed for the IMXRT1060-EVK. The same chip is used in the Teensy 4.0/1, but that will probably get its own set of examples due to some differences such as the FCB.

6 files changed, 170 insertions, 0 deletions

diff --git a/examples/mimxrt1062-evk/.cargo/config.toml b/examples/mimxrt1062-evk/.cargo/config.toml
new file mode 100644
index 000000000..ca4c606dc
--- /dev/null
+++ b/examples/mimxrt1062-evk/.cargo/config.toml
@@ -0,0 +1,8 @@
+[target.thumbv7em-none-eabihf]
+runner = 'probe-rs run --chip MIMXRT1060'
+
+[build]
+target = "thumbv7em-none-eabihf" # Cortex-M7
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/mimxrt1062-evk/Cargo.toml b/examples/mimxrt1062-evk/Cargo.toml
new file mode 100644
index 000000000..430a26b41
--- /dev/null
+++ b/examples/mimxrt1062-evk/Cargo.toml
@@ -0,0 +1,29 @@
+[package]
+name = "embassy-imxrt1062-evk-examples"
+version = "0.1.0"
+edition = "2021"
+license = "MIT or Apache-2.0"
+
+[dependencies]
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.3"
+defmt = "1.0.1"
+defmt-rtt = "1.0.0"
+
+embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt"] }
+embassy-futures = { version = "0.1.1", path = "../../embassy-futures" }
+embassy-nxp = { version = "0.1.0", path = "../../embassy-nxp", features = ["defmt", "mimxrt1062", "unstable-pac", "time-driver-pit"] }
+embassy-time = { version = "0.4", path = "../../embassy-time", features = ["defmt", ] } # "defmt-timestamp-uptime"
+embassy-sync = { version = "0.7.0", path = "../../embassy-sync", features = ["defmt"] }
+embedded-hal-1 = { package = "embedded-hal", version = "1.0" }
+embedded-hal-async = "1.0.0"
+
+imxrt-boot-gen = { version = "0.3.4", features = ["imxrt1060"] }
+panic-probe = { version = "1.0.0", features = ["print-defmt"] }
+panic-semihosting = "0.6.0"
+
+[build-dependencies]
+imxrt-rt = { version = "0.1.7", features = ["device"] }
+
+[profile.release]
+debug = 2
diff --git a/examples/mimxrt1062-evk/build.rs b/examples/mimxrt1062-evk/build.rs
new file mode 100644
index 000000000..e0e0d547e
--- /dev/null
+++ b/examples/mimxrt1062-evk/build.rs
@@ -0,0 +1,12 @@
+use imxrt_rt::{Family, RuntimeBuilder};
+
+fn main() {
+    RuntimeBuilder::from_flexspi(Family::Imxrt1060, 8 * 1024 * 1024)
+        .build()
+        .unwrap();
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+    // Not link.x, as imxrt-rt needs to do some special things
+    println!("cargo:rustc-link-arg-bins=-Timxrt-link.x");
+}
diff --git a/examples/mimxrt1062-evk/src/bin/blinky.rs b/examples/mimxrt1062-evk/src/bin/blinky.rs
new file mode 100644
index 000000000..b6d90d94d
--- /dev/null
+++ b/examples/mimxrt1062-evk/src/bin/blinky.rs
@@ -0,0 +1,25 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nxp::gpio::{Level, Output};
+use embassy_time::Timer;
+// Must include `embassy_imxrt1062_evk_examples` to ensure the FCB gets linked.
+use {defmt_rtt as _, embassy_imxrt1062_evk_examples as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    let p = embassy_nxp::init(Default::default());
+    info!("Hello world!");
+
+    let led = p.GPIO_AD_B0_08;
+    let mut led = Output::new(led, Level::Low);
+
+    loop {
+        Timer::after_millis(500).await;
+
+        info!("Toggle");
+        led.toggle();
+    }
+}
diff --git a/examples/mimxrt1062-evk/src/bin/button.rs b/examples/mimxrt1062-evk/src/bin/button.rs
new file mode 100644
index 000000000..d60fa3dac
--- /dev/null
+++ b/examples/mimxrt1062-evk/src/bin/button.rs
@@ -0,0 +1,36 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nxp::gpio::{Input, Level, Output, Pull};
+use {defmt_rtt as _, embassy_imxrt1062_evk_examples as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    let p = embassy_nxp::init(Default::default());
+    info!("Hello world!");
+
+    // User LED (D8)
+    let led = p.GPIO_AD_B0_08;
+    // User button (SW5)
+    let button = p.WAKEUP;
+    let mut button = Input::new(button, Pull::Up100K);
+    let mut led = Output::new(led, Level::Low);
+    led.set_high();
+
+    loop {
+        button.wait_for_falling_edge().await;
+
+        info!("Toggled");
+        led.toggle();
+
+        // Software debounce.
+        button.wait_for_rising_edge().await;
+
+        // Stabilization.
+        for _ in 0..100_000 {
+            cortex_m::asm::nop();
+        }
+    }
+}
diff --git a/examples/mimxrt1062-evk/src/lib.rs b/examples/mimxrt1062-evk/src/lib.rs
new file mode 100644
index 000000000..3f99f9db3
--- /dev/null
+++ b/examples/mimxrt1062-evk/src/lib.rs
@@ -0,0 +1,60 @@
+//! FlexSPI configuration block (FCB) for the iMXRT1060-EVK
+//!
+//! This uses IS25WP QuadSPI flash.
+
+#![no_std]
+
+use imxrt_boot_gen::flexspi::opcodes::sdr::*;
+use imxrt_boot_gen::flexspi::{self, FlashPadType, ReadSampleClockSource, SerialClockFrequency, SerialFlashRegion, *};
+use imxrt_boot_gen::serial_flash::*;
+pub use nor::ConfigurationBlock;
+
+const SEQ_READ: Sequence = SequenceBuilder::new()
+    .instr(Instr::new(CMD, Pads::One, 0xEB))
+    .instr(Instr::new(RADDR, Pads::Four, 0x18))
+    .instr(Instr::new(DUMMY, Pads::Four, 0x06))
+    .instr(Instr::new(READ, Pads::Four, 0x04))
+    .build();
+const SEQ_READ_STATUS: Sequence = SequenceBuilder::new()
+    .instr(Instr::new(CMD, Pads::One, 0x05))
+    .instr(Instr::new(READ, Pads::One, 0x04))
+    .build();
+const SEQ_WRITE_ENABLE: Sequence = SequenceBuilder::new().instr(Instr::new(CMD, Pads::One, 0x06)).build();
+const SEQ_ERASE_SECTOR: Sequence = SequenceBuilder::new()
+    .instr(Instr::new(CMD, Pads::One, 0x20))
+    .instr(Instr::new(RADDR, Pads::One, 0x18))
+    .build();
+const SEQ_PAGE_PROGRAM: Sequence = SequenceBuilder::new()
+    .instr(Instr::new(CMD, Pads::One, 0x02))
+    .instr(Instr::new(RADDR, Pads::One, 0x18))
+    .instr(Instr::new(WRITE, Pads::One, 0x04))
+    .build();
+const SEQ_CHIP_ERASE: Sequence = SequenceBuilder::new().instr(Instr::new(CMD, Pads::One, 0x60)).build();
+
+const LUT: LookupTable = LookupTable::new()
+    .command(Command::Read, SEQ_READ)
+    .command(Command::ReadStatus, SEQ_READ_STATUS)
+    .command(Command::WriteEnable, SEQ_WRITE_ENABLE)
+    .command(Command::EraseSector, SEQ_ERASE_SECTOR)
+    .command(Command::PageProgram, SEQ_PAGE_PROGRAM)
+    .command(Command::ChipErase, SEQ_CHIP_ERASE);
+
+const COMMON_CONFIGURATION_BLOCK: flexspi::ConfigurationBlock = flexspi::ConfigurationBlock::new(LUT)
+    .version(Version::new(1, 4, 0))
+    .read_sample_clk_src(ReadSampleClockSource::LoopbackFromDQSPad)
+    .cs_hold_time(3)
+    .cs_setup_time(3)
+    .controller_misc_options(0x10)
+    .serial_flash_pad_type(FlashPadType::Quad)
+    .serial_clk_freq(SerialClockFrequency::MHz133)
+    .flash_size(SerialFlashRegion::A1, 8 * 1024 * 1024);
+
+pub const SERIAL_NOR_CONFIGURATION_BLOCK: nor::ConfigurationBlock =
+    nor::ConfigurationBlock::new(COMMON_CONFIGURATION_BLOCK)
+        .page_size(256)
+        .sector_size(4096)
+        .ip_cmd_serial_clk_freq(nor::SerialClockFrequency::MHz30);
+
+#[no_mangle]
+#[cfg_attr(all(target_arch = "arm", target_os = "none"), link_section = ".fcb")]
+pub static FLEXSPI_CONFIGURATION_BLOCK: nor::ConfigurationBlock = SERIAL_NOR_CONFIGURATION_BLOCK;