Update developer dependencies to use teensy4_bsp

The previous developer dependencies were not tied to a specific
release of the teensy4-rs project, nor were they tied to a specific
HAL release. This means that a new clone of the repo would fail to
build the examples.

This commit updates the developer dependencies. Everything builds.

Cargo.toml

@@ -17,7 +17,6 @@ cortex-m = "0.6.3"
 
 [dependencies.imxrt-hal]
 version = "0.4.0"
-git = "https://github.com/imxrt-rs/imxrt-rs.git"
 
 [features]
 # TODO add features for other variants once available in the HAL.
@@ -37,14 +36,17 @@ byob = []
 #
 # These are pulled in only when checking & building examples. You may need
 # additional build dependencies to build these. See the README for details.
-[target.thumbv7em-none-eabihf.dev-dependencies]
-teensy4-rt  = { git = "https://github.com/mciantyre/teensy4-rs.git" }
-teensy4-fcb = { git = "https://github.com/mciantyre/teensy4-rs.git" }
+[target.thumbv7em-none-eabihf.dev-dependencies.teensy4-bsp]
+version  = "0.1"
+features = ["rt"]
 
-[target.thumbv7em-none-eabihf.dev-dependencies.imxrt-hal]
-version = "0.4.0"
-features = ["imxrt1062", "rt"]
-git = "https://github.com/imxrt-rs/imxrt-rs.git"
+[target.thumbv7em-none-eabihf.dev-dependencies]
+cortex-m-rt = "0.6"
 
 [dev-dependencies]
 panic-halt = "0.2.0"
+
+# Don't optimize build dependencies, like proc macros.
+# Helps with build times.
+[profile.release.build-override]
+opt-level = 0

Makefile

@@ -1,6 +1,6 @@
 # Simple automation for running tests and examples
 
-RUSTFLAGS="-C link-args=-Tlink.x"
+RUSTFLAGS="-C link-args=-Tt4link.x"
 TARGET=thumbv7em-none-eabihf
 EXAMPLES=target/$(TARGET)/release/examples
 OBJDUMP=arm-none-eabi-objdump

examples/demo/mod.rs

@@ -2,10 +2,10 @@
 
 use core::time::Duration;
 use cortex_m::peripheral::DWT;
+use cortex_m_rt::interrupt;
 use imxrt_hal::gpt;
 use imxrt_hal::gpt::{OutputCompareRegister, GPT};
 use imxrt_hal::ral::interrupt;
-use teensy4_rt::interrupt;
 
 /// Output compare register that we'll use for delays
 const DELAY_OCR: OutputCompareRegister = OutputCompareRegister::Two;

examples/t4_blocking.rs

@@ -10,27 +10,25 @@
 #![no_main]
 
 extern crate panic_halt;
-#[cfg(target_arch = "arm")]
-extern crate teensy4_fcb;
 
 mod demo;
 
-use teensy4_rt::entry;
+use cortex_m_rt::entry;
 
 const BAUD: u32 = 115_200;
 const TX_FIFO_SIZE: u8 = 4;
 
 #[entry]
 fn main() -> ! {
-    let imxrt_hal::Peripherals {
+    let teensy4_bsp::Peripherals {
         uart,
         mut ccm,
         dcdc,
         gpt1,
         gpt2,
         iomuxc,
         ..
-    } = imxrt_hal::Peripherals::take().unwrap();
+    } = teensy4_bsp::Peripherals::take().unwrap();
 
     //
     // UART initialization

examples/t4_dma.rs

@@ -8,14 +8,12 @@
 #![no_main]
 
 extern crate panic_halt;
-#[cfg(target_arch = "arm")]
-extern crate teensy4_fcb;
 
 mod demo;
 
+use cortex_m_rt::entry;
+use cortex_m_rt::interrupt;
 use imxrt_hal::ral::interrupt;
-use teensy4_rt::entry;
-use teensy4_rt::interrupt;
 
 const BAUD: u32 = 115_200;
 
@@ -38,7 +36,7 @@ mod buffer {
 
 #[entry]
 fn main() -> ! {
-    let imxrt_hal::Peripherals {
+    let teensy4_bsp::Peripherals {
         uart,
         mut ccm,
         dcdc,
@@ -47,7 +45,7 @@ fn main() -> ! {
         iomuxc,
         dma,
         ..
-    } = imxrt_hal::Peripherals::take().unwrap();
+    } = teensy4_bsp::Peripherals::take().unwrap();
 
     //
     // DMA initialization

examples/t4_idle.rs

@@ -8,12 +8,10 @@
 #![no_main]
 
 extern crate panic_halt;
-#[cfg(target_arch = "arm")]
-extern crate teensy4_fcb;
 
 mod demo;
 
-use teensy4_rt::entry;
+use cortex_m_rt::entry;
 
 const BAUD: u32 = 115_200;
 
@@ -31,7 +29,7 @@ mod buffer {
 
 #[entry]
 fn main() -> ! {
-    let imxrt_hal::Peripherals {
+    let teensy4_bsp::Peripherals {
         uart,
         mut ccm,
         dcdc,
@@ -40,7 +38,7 @@ fn main() -> ! {
         iomuxc,
         dma,
         ..
-    } = imxrt_hal::Peripherals::take().unwrap();
+    } = teensy4_bsp::Peripherals::take().unwrap();
 
     //
     // DMA initialization