Use make_static! from static-cell v1.1

38 files changed, 168 insertions, 300 deletions

diff --git a/embassy-executor/Cargo.toml b/embassy-executor/Cargo.toml
index ce032479d..1e5494ef8 100644
--- a/embassy-executor/Cargo.toml
+++ b/embassy-executor/Cargo.toml
@@ -65,7 +65,7 @@ embassy-macros  = { version = "0.2.0", path = "../embassy-macros" }
 embassy-time  = { version = "0.1.0", path = "../embassy-time", optional = true}
 atomic-polyfill = "1.0.1"
 critical-section = "1.1"
-static_cell = "1.0"
+static_cell = "1.1"
 
 # arch-cortex-m dependencies
 cortex-m = { version = "0.7.6", optional = true }
diff --git a/embassy-rp/Cargo.toml b/embassy-rp/Cargo.toml
index e032dfdae..5f08c7f33 100644
--- a/embassy-rp/Cargo.toml
+++ b/embassy-rp/Cargo.toml
@@ -86,4 +86,4 @@ rp2040-boot2 = "0.3"
 
 [dev-dependencies]
 embassy-executor = { version = "0.2.0", path = "../embassy-executor", features = ["arch-std", "executor-thread"] }
-static_cell = "1.0"
+static_cell = "1.1"
diff --git a/embassy-sync/Cargo.toml b/embassy-sync/Cargo.toml
index bc06b92cd..340724eab 100644
--- a/embassy-sync/Cargo.toml
+++ b/embassy-sync/Cargo.toml
@@ -45,4 +45,4 @@ futures-util = { version = "0.3.17", features = [ "channel" ] }
 
 # Enable critical-section implementation for std, for tests
 critical-section = { version = "1.1", features = ["std"] }
-static_cell = "1.0"
+static_cell = "1.1"
diff --git a/examples/nrf52840/Cargo.toml b/examples/nrf52840/Cargo.toml
index 0f75b3ab7..6627b7861 100644
--- a/examples/nrf52840/Cargo.toml
+++ b/examples/nrf52840/Cargo.toml
@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [features]
 default = ["nightly"]
-nightly = ["embassy-executor/nightly", "embassy-nrf/nightly", "embassy-net/nightly", "embassy-nrf/unstable-traits", "embassy-time/nightly", "embassy-time/unstable-traits",
+nightly = ["embassy-executor/nightly", "embassy-nrf/nightly", "embassy-net/nightly", "embassy-nrf/unstable-traits", "embassy-time/nightly", "embassy-time/unstable-traits", "static_cell/nightly",
            "embassy-usb", "embedded-io/async", "embassy-net", "embassy-lora", "lora-phy", "lorawan-device", "lorawan"]
 
 [dependencies]
@@ -26,7 +26,7 @@ lorawan = { version = "0.7.3", default-features = false, features = ["default-cr
 defmt = "0.3"
 defmt-rtt = "0.4"
 
-static_cell = "1.0"
+static_cell = "1.1"
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
 cortex-m-rt = "0.7.0"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
diff --git a/examples/nrf52840/src/bin/usb_ethernet.rs b/examples/nrf52840/src/bin/usb_ethernet.rs
index 786025c43..1065f5b5d 100644
--- a/examples/nrf52840/src/bin/usb_ethernet.rs
+++ b/examples/nrf52840/src/bin/usb_ethernet.rs
@@ -16,7 +16,7 @@ use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState
 use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
 use embassy_usb::{Builder, Config, UsbDevice};
 use embedded_io::asynch::Write;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs {
@@ -27,15 +27,6 @@ bind_interrupts!(struct Irqs {
 
 type MyDriver = Driver<'static, peripherals::USBD, HardwareVbusDetect>;
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 const MTU: usize = 1514;
 
 #[embassy_executor::task]
@@ -83,11 +74,11 @@ async fn main(spawner: Spawner) {
     let mut builder = Builder::new(
         driver,
         config,
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 128])[..],
-        &mut singleton!([0; 128])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 128])[..],
+        &mut make_static!([0; 128])[..],
     );
 
     // Our MAC addr.
@@ -96,14 +87,14 @@ async fn main(spawner: Spawner) {
     let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
 
     // Create classes on the builder.
-    let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
+    let class = CdcNcmClass::new(&mut builder, make_static!(State::new()), host_mac_addr, 64);
 
     // Build the builder.
     let usb = builder.build();
 
     unwrap!(spawner.spawn(usb_task(usb)));
 
-    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
+    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(make_static!(NetState::new()), our_mac_addr);
     unwrap!(spawner.spawn(usb_ncm_task(runner)));
 
     let config = embassy_net::Config::Dhcp(Default::default());
@@ -120,7 +111,12 @@ async fn main(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     unwrap!(spawner.spawn(net_task(stack)));
 
diff --git a/examples/nrf52840/src/bin/usb_serial_multitask.rs b/examples/nrf52840/src/bin/usb_serial_multitask.rs
index ac22d9499..cd4392903 100644
--- a/examples/nrf52840/src/bin/usb_serial_multitask.rs
+++ b/examples/nrf52840/src/bin/usb_serial_multitask.rs
@@ -12,7 +12,7 @@ use embassy_nrf::{bind_interrupts, pac, peripherals, usb};
 use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
 use embassy_usb::driver::EndpointError;
 use embassy_usb::{Builder, Config, UsbDevice};
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs {
@@ -20,15 +20,6 @@ bind_interrupts!(struct Irqs {
     POWER_CLOCK => usb::vbus_detect::InterruptHandler;
 });
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 type MyDriver = Driver<'static, peripherals::USBD, HardwareVbusDetect>;
 
 #[embassy_executor::task]
@@ -73,17 +64,17 @@ async fn main(spawner: Spawner) {
     config.device_protocol = 0x01;
     config.composite_with_iads = true;
 
-    let state = singleton!(State::new());
+    let state = make_static!(State::new());
 
     // Create embassy-usb DeviceBuilder using the driver and config.
     let mut builder = Builder::new(
         driver,
         config,
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 128])[..],
-        &mut singleton!([0; 128])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 128])[..],
+        &mut make_static!([0; 128])[..],
     );
 
     // Create classes on the builder.
diff --git a/examples/nrf5340/Cargo.toml b/examples/nrf5340/Cargo.toml
index 40422e7df..efb66bae6 100644
--- a/examples/nrf5340/Cargo.toml
+++ b/examples/nrf5340/Cargo.toml
@@ -42,7 +42,7 @@ embedded-io = { version = "0.4.0", features = [ "async" ]}
 defmt = "0.3"
 defmt-rtt = "0.4"
 
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
 cortex-m-rt = "0.7.0"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
diff --git a/examples/rp/Cargo.toml b/examples/rp/Cargo.toml
index 58b701915..e946b481d 100644
--- a/examples/rp/Cargo.toml
+++ b/examples/rp/Cargo.toml
@@ -45,7 +45,7 @@ embedded-hal-1 = { package = "embedded-hal", version = "=1.0.0-alpha.10" }
 embedded-hal-async = "0.2.0-alpha.1"
 embedded-io = { version = "0.4.0", features = ["async", "defmt"] }
 embedded-storage = { version = "0.3" }
-static_cell = "1.0.0"
+static_cell = { version = "1.1", features = ["nightly"]}
 log = "0.4"
 pio-proc = "0.2"
 pio = "0.2.1"
diff --git a/examples/rp/src/bin/ethernet_w5500_multisocket.rs b/examples/rp/src/bin/ethernet_w5500_multisocket.rs
index c8e6d46a6..63e142e7d 100644
--- a/examples/rp/src/bin/ethernet_w5500_multisocket.rs
+++ b/examples/rp/src/bin/ethernet_w5500_multisocket.rs
@@ -19,18 +19,9 @@ use embassy_time::Duration;
 use embedded_hal_async::spi::ExclusiveDevice;
 use embedded_io::asynch::Write;
 use rand::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 #[embassy_executor::task]
 async fn ethernet_task(
     runner: Runner<
@@ -62,7 +53,7 @@ async fn main(spawner: Spawner) {
     let w5500_reset = Output::new(p.PIN_20, Level::High);
 
     let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
-    let state = singleton!(State::<8, 8>::new());
+    let state = make_static!(State::<8, 8>::new());
     let (device, runner) =
         embassy_net_w5500::new(mac_addr, state, ExclusiveDevice::new(spi, cs), w5500_int, w5500_reset).await;
     unwrap!(spawner.spawn(ethernet_task(runner)));
@@ -71,10 +62,10 @@ async fn main(spawner: Spawner) {
     let seed = rng.next_u64();
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         device,
         embassy_net::Config::Dhcp(Default::default()),
-        singleton!(StackResources::<3>::new()),
+        make_static!(StackResources::<3>::new()),
         seed
     ));
 
diff --git a/examples/rp/src/bin/ethernet_w5500_tcp_client.rs b/examples/rp/src/bin/ethernet_w5500_tcp_client.rs
index 9a7c3ad19..a532de00d 100644
--- a/examples/rp/src/bin/ethernet_w5500_tcp_client.rs
+++ b/examples/rp/src/bin/ethernet_w5500_tcp_client.rs
@@ -21,18 +21,9 @@ use embassy_time::{Duration, Timer};
 use embedded_hal_async::spi::ExclusiveDevice;
 use embedded_io::asynch::Write;
 use rand::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 #[embassy_executor::task]
 async fn ethernet_task(
     runner: Runner<
@@ -65,7 +56,7 @@ async fn main(spawner: Spawner) {
     let w5500_reset = Output::new(p.PIN_20, Level::High);
 
     let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
-    let state = singleton!(State::<8, 8>::new());
+    let state = make_static!(State::<8, 8>::new());
     let (device, runner) =
         embassy_net_w5500::new(mac_addr, state, ExclusiveDevice::new(spi, cs), w5500_int, w5500_reset).await;
     unwrap!(spawner.spawn(ethernet_task(runner)));
@@ -74,10 +65,10 @@ async fn main(spawner: Spawner) {
     let seed = rng.next_u64();
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         device,
         embassy_net::Config::Dhcp(Default::default()),
-        singleton!(StackResources::<2>::new()),
+        make_static!(StackResources::<2>::new()),
         seed
     ));
 
diff --git a/examples/rp/src/bin/ethernet_w5500_tcp_server.rs b/examples/rp/src/bin/ethernet_w5500_tcp_server.rs
index f02543246..599f6b1e9 100644
--- a/examples/rp/src/bin/ethernet_w5500_tcp_server.rs
+++ b/examples/rp/src/bin/ethernet_w5500_tcp_server.rs
@@ -20,18 +20,8 @@ use embassy_time::Duration;
 use embedded_hal_async::spi::ExclusiveDevice;
 use embedded_io::asynch::Write;
 use rand::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 #[embassy_executor::task]
 async fn ethernet_task(
     runner: Runner<
@@ -64,7 +54,7 @@ async fn main(spawner: Spawner) {
     let w5500_reset = Output::new(p.PIN_20, Level::High);
 
     let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
-    let state = singleton!(State::<8, 8>::new());
+    let state = make_static!(State::<8, 8>::new());
     let (device, runner) =
         embassy_net_w5500::new(mac_addr, state, ExclusiveDevice::new(spi, cs), w5500_int, w5500_reset).await;
     unwrap!(spawner.spawn(ethernet_task(runner)));
@@ -73,10 +63,10 @@ async fn main(spawner: Spawner) {
     let seed = rng.next_u64();
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         device,
         embassy_net::Config::Dhcp(Default::default()),
-        singleton!(StackResources::<2>::new()),
+        make_static!(StackResources::<2>::new()),
         seed
     ));
 
diff --git a/examples/rp/src/bin/ethernet_w5500_udp.rs b/examples/rp/src/bin/ethernet_w5500_udp.rs
index 2c54f711e..ac5a65bb6 100644
--- a/examples/rp/src/bin/ethernet_w5500_udp.rs
+++ b/examples/rp/src/bin/ethernet_w5500_udp.rs
@@ -18,18 +18,8 @@ use embassy_rp::peripherals::{PIN_17, PIN_20, PIN_21, SPI0};
 use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
 use embedded_hal_async::spi::ExclusiveDevice;
 use rand::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 #[embassy_executor::task]
 async fn ethernet_task(
     runner: Runner<
@@ -61,7 +51,7 @@ async fn main(spawner: Spawner) {
     let w5500_reset = Output::new(p.PIN_20, Level::High);
 
     let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
-    let state = singleton!(State::<8, 8>::new());
+    let state = make_static!(State::<8, 8>::new());
     let (device, runner) =
         embassy_net_w5500::new(mac_addr, state, ExclusiveDevice::new(spi, cs), w5500_int, w5500_reset).await;
     unwrap!(spawner.spawn(ethernet_task(runner)));
@@ -70,10 +60,10 @@ async fn main(spawner: Spawner) {
     let seed = rng.next_u64();
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         device,
         embassy_net::Config::Dhcp(Default::default()),
-        singleton!(StackResources::<2>::new()),
+        make_static!(StackResources::<2>::new()),
         seed
     ));
 
diff --git a/examples/rp/src/bin/lora_p2p_send_multicore.rs b/examples/rp/src/bin/lora_p2p_send_multicore.rs
index 5585606d8..eef2f7a53 100644
--- a/examples/rp/src/bin/lora_p2p_send_multicore.rs
+++ b/examples/rp/src/bin/lora_p2p_send_multicore.rs
@@ -7,7 +7,6 @@
 
 use defmt::*;
 use embassy_executor::Executor;
-use embassy_executor::_export::StaticCell;
 use embassy_lora::iv::GenericSx126xInterfaceVariant;
 use embassy_rp::gpio::{AnyPin, Input, Level, Output, Pin, Pull};
 use embassy_rp::multicore::{spawn_core1, Stack};
@@ -19,6 +18,7 @@ use embassy_time::{Delay, Duration, Timer};
 use lora_phy::mod_params::*;
 use lora_phy::sx1261_2::SX1261_2;
 use lora_phy::LoRa;
+use static_cell::StaticCell;
 use {defmt_rtt as _, panic_probe as _};
 
 static mut CORE1_STACK: Stack<4096> = Stack::new();
diff --git a/examples/rp/src/bin/multicore.rs b/examples/rp/src/bin/multicore.rs
index 376b2b61e..57278dd6c 100644
--- a/examples/rp/src/bin/multicore.rs
+++ b/examples/rp/src/bin/multicore.rs
@@ -4,13 +4,13 @@
 
 use defmt::*;
 use embassy_executor::Executor;
-use embassy_executor::_export::StaticCell;
 use embassy_rp::gpio::{Level, Output};
 use embassy_rp::multicore::{spawn_core1, Stack};
 use embassy_rp::peripherals::PIN_25;
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::channel::Channel;
 use embassy_time::{Duration, Timer};
+use static_cell::StaticCell;
 use {defmt_rtt as _, panic_probe as _};
 
 static mut CORE1_STACK: Stack<4096> = Stack::new();
diff --git a/examples/rp/src/bin/uart_buffered_split.rs b/examples/rp/src/bin/uart_buffered_split.rs
index d6f01b4de..9df99bd58 100644
--- a/examples/rp/src/bin/uart_buffered_split.rs
+++ b/examples/rp/src/bin/uart_buffered_split.rs
@@ -4,34 +4,25 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_executor::_export::StaticCell;
 use embassy_rp::bind_interrupts;
 use embassy_rp::peripherals::UART0;
 use embassy_rp::uart::{BufferedInterruptHandler, BufferedUart, BufferedUartRx, Config};
 use embassy_time::{Duration, Timer};
 use embedded_io::asynch::{Read, Write};
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs {
     UART0_IRQ => BufferedInterruptHandler<UART0>;
 });
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
     let p = embassy_rp::init(Default::default());
     let (tx_pin, rx_pin, uart) = (p.PIN_0, p.PIN_1, p.UART0);
 
-    let tx_buf = &mut singleton!([0u8; 16])[..];
-    let rx_buf = &mut singleton!([0u8; 16])[..];
+    let tx_buf = &mut make_static!([0u8; 16])[..];
+    let rx_buf = &mut make_static!([0u8; 16])[..];
     let uart = BufferedUart::new(uart, Irqs, tx_pin, rx_pin, tx_buf, rx_buf, Config::default());
     let (rx, mut tx) = uart.split();
 
diff --git a/examples/rp/src/bin/usb_ethernet.rs b/examples/rp/src/bin/usb_ethernet.rs
index 38ff1620d..16fbf5e91 100644
--- a/examples/rp/src/bin/usb_ethernet.rs
+++ b/examples/rp/src/bin/usb_ethernet.rs
@@ -13,7 +13,7 @@ use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState
 use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
 use embassy_usb::{Builder, Config, UsbDevice};
 use embedded_io::asynch::Write;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs {
@@ -22,15 +22,6 @@ bind_interrupts!(struct Irqs {
 
 type MyDriver = Driver<'static, peripherals::USB>;
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 const MTU: usize = 1514;
 
 #[embassy_executor::task]
@@ -73,10 +64,10 @@ async fn main(spawner: Spawner) {
     let mut builder = Builder::new(
         driver,
         config,
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 128])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 128])[..],
     );
 
     // Our MAC addr.
@@ -85,14 +76,14 @@ async fn main(spawner: Spawner) {
     let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
 
     // Create classes on the builder.
-    let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
+    let class = CdcNcmClass::new(&mut builder, make_static!(State::new()), host_mac_addr, 64);
 
     // Build the builder.
     let usb = builder.build();
 
     unwrap!(spawner.spawn(usb_task(usb)));
 
-    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
+    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(make_static!(NetState::new()), our_mac_addr);
     unwrap!(spawner.spawn(usb_ncm_task(runner)));
 
     let config = embassy_net::Config::Dhcp(Default::default());
@@ -106,7 +97,12 @@ async fn main(spawner: Spawner) {
     let seed = 1234; // guaranteed random, chosen by a fair dice roll
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     unwrap!(spawner.spawn(net_task(stack)));
 
diff --git a/examples/rp/src/bin/wifi_ap_tcp_server.rs b/examples/rp/src/bin/wifi_ap_tcp_server.rs
index 15264524e..b27d3c9f8 100644
--- a/examples/rp/src/bin/wifi_ap_tcp_server.rs
+++ b/examples/rp/src/bin/wifi_ap_tcp_server.rs
@@ -16,17 +16,9 @@ use embassy_rp::peripherals::{DMA_CH0, PIN_23, PIN_25, PIO0};
 use embassy_rp::pio::Pio;
 use embassy_time::Duration;
 use embedded_io::asynch::Write;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[embassy_executor::task]
 async fn wifi_task(
     runner: cyw43::Runner<'static, Output<'static, PIN_23>, PioSpi<'static, PIN_25, PIO0, 0, DMA_CH0>>,
@@ -60,7 +52,7 @@ async fn main(spawner: Spawner) {
     let mut pio = Pio::new(p.PIO0);
     let spi = PioSpi::new(&mut pio.common, pio.sm0, pio.irq0, cs, p.PIN_24, p.PIN_29, p.DMA_CH0);
 
-    let state = singleton!(cyw43::State::new());
+    let state = make_static!(cyw43::State::new());
     let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
     unwrap!(spawner.spawn(wifi_task(runner)));
 
@@ -80,10 +72,10 @@ async fn main(spawner: Spawner) {
     let seed = 0x0123_4567_89ab_cdef; // chosen by fair dice roll. guarenteed to be random.
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         net_device,
         config,
-        singleton!(StackResources::<2>::new()),
+        make_static!(StackResources::<2>::new()),
         seed
     ));
 
diff --git a/examples/rp/src/bin/wifi_scan.rs b/examples/rp/src/bin/wifi_scan.rs
index aa5e5a399..79534f229 100644
--- a/examples/rp/src/bin/wifi_scan.rs
+++ b/examples/rp/src/bin/wifi_scan.rs
@@ -13,17 +13,9 @@ use embassy_net::Stack;
 use embassy_rp::gpio::{Level, Output};
 use embassy_rp::peripherals::{DMA_CH0, PIN_23, PIN_25, PIO0};
 use embassy_rp::pio::Pio;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[embassy_executor::task]
 async fn wifi_task(
     runner: cyw43::Runner<'static, Output<'static, PIN_23>, PioSpi<'static, PIN_25, PIO0, 0, DMA_CH0>>,
@@ -57,7 +49,7 @@ async fn main(spawner: Spawner) {
     let mut pio = Pio::new(p.PIO0);
     let spi = PioSpi::new(&mut pio.common, pio.sm0, pio.irq0, cs, p.PIN_24, p.PIN_29, p.DMA_CH0);
 
-    let state = singleton!(cyw43::State::new());
+    let state = make_static!(cyw43::State::new());
     let (_net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
     unwrap!(spawner.spawn(wifi_task(runner)));
 
diff --git a/examples/rp/src/bin/wifi_tcp_server.rs b/examples/rp/src/bin/wifi_tcp_server.rs
index eafa25f68..1a00bca96 100644
--- a/examples/rp/src/bin/wifi_tcp_server.rs
+++ b/examples/rp/src/bin/wifi_tcp_server.rs
@@ -16,17 +16,9 @@ use embassy_rp::peripherals::{DMA_CH0, PIN_23, PIN_25, PIO0};
 use embassy_rp::pio::Pio;
 use embassy_time::Duration;
 use embedded_io::asynch::Write;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[embassy_executor::task]
 async fn wifi_task(
     runner: cyw43::Runner<'static, Output<'static, PIN_23>, PioSpi<'static, PIN_25, PIO0, 0, DMA_CH0>>,
@@ -60,7 +52,7 @@ async fn main(spawner: Spawner) {
     let mut pio = Pio::new(p.PIO0);
     let spi = PioSpi::new(&mut pio.common, pio.sm0, pio.irq0, cs, p.PIN_24, p.PIN_29, p.DMA_CH0);
 
-    let state = singleton!(cyw43::State::new());
+    let state = make_static!(cyw43::State::new());
     let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
     unwrap!(spawner.spawn(wifi_task(runner)));
 
@@ -80,10 +72,10 @@ async fn main(spawner: Spawner) {
     let seed = 0x0123_4567_89ab_cdef; // chosen by fair dice roll. guarenteed to be random.
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(
+    let stack = &*make_static!(Stack::new(
         net_device,
         config,
-        singleton!(StackResources::<2>::new()),
+        make_static!(StackResources::<2>::new()),
         seed
     ));
 
diff --git a/examples/std/Cargo.toml b/examples/std/Cargo.toml
index 36770ca9c..878ad8c5a 100644
--- a/examples/std/Cargo.toml
+++ b/examples/std/Cargo.toml
@@ -22,4 +22,4 @@ libc = "0.2.101"
 clap = { version = "3.0.0-beta.5", features = ["derive"] }
 rand_core = { version = "0.6.3", features = ["std"] }
 heapless = { version = "0.7.5", default-features = false }
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/std/src/bin/net.rs b/examples/std/src/bin/net.rs
index d93616254..b42bfc13b 100644
--- a/examples/std/src/bin/net.rs
+++ b/examples/std/src/bin/net.rs
@@ -11,21 +11,12 @@ use embedded_io::asynch::Write;
 use heapless::Vec;
 use log::*;
 use rand_core::{OsRng, RngCore};
-use static_cell::StaticCell;
+use static_cell::{make_static, StaticCell};
 
 #[path = "../tuntap.rs"]
 mod tuntap;
 
 use crate::tuntap::TunTapDevice;
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[derive(Parser)]
 #[clap(version = "1.0")]
 struct Opts {
@@ -66,7 +57,12 @@ async fn main_task(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<3>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<3>::new()),
+        seed
+    ));
 
     // Launch network task
     spawner.spawn(net_task(stack)).unwrap();
diff --git a/examples/std/src/bin/net_dns.rs b/examples/std/src/bin/net_dns.rs
index d1e1f8212..932ac5831 100644
--- a/examples/std/src/bin/net_dns.rs
+++ b/examples/std/src/bin/net_dns.rs
@@ -9,21 +9,12 @@ use embassy_net::{Config, Ipv4Address, Ipv4Cidr, Stack, StackResources};
 use heapless::Vec;
 use log::*;
 use rand_core::{OsRng, RngCore};
-use static_cell::StaticCell;
+use static_cell::{make_static, StaticCell};
 
 #[path = "../tuntap.rs"]
 mod tuntap;
 
 use crate::tuntap::TunTapDevice;
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[derive(Parser)]
 #[clap(version = "1.0")]
 struct Opts {
@@ -65,7 +56,12 @@ async fn main_task(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack: &Stack<_> = &*singleton!(Stack::new(device, config, singleton!(StackResources::<3>::new()), seed));
+    let stack: &Stack<_> = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<3>::new()),
+        seed
+    ));
 
     // Launch network task
     spawner.spawn(net_task(stack)).unwrap();
diff --git a/examples/std/src/bin/net_udp.rs b/examples/std/src/bin/net_udp.rs
index 4df23edf6..d89ec7643 100644
--- a/examples/std/src/bin/net_udp.rs
+++ b/examples/std/src/bin/net_udp.rs
@@ -7,21 +7,12 @@ use embassy_net::{Config, Ipv4Address, Ipv4Cidr, Stack, StackResources};
 use heapless::Vec;
 use log::*;
 use rand_core::{OsRng, RngCore};
-use static_cell::StaticCell;
+use static_cell::{make_static, StaticCell};
 
 #[path = "../tuntap.rs"]
 mod tuntap;
 
 use crate::tuntap::TunTapDevice;
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[derive(Parser)]
 #[clap(version = "1.0")]
 struct Opts {
@@ -62,7 +53,12 @@ async fn main_task(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<3>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<3>::new()),
+        seed
+    ));
 
     // Launch network task
     spawner.spawn(net_task(stack)).unwrap();
diff --git a/examples/std/src/bin/tcp_accept.rs b/examples/std/src/bin/tcp_accept.rs
index 97ce77f42..d24e218dc 100644
--- a/examples/std/src/bin/tcp_accept.rs
+++ b/examples/std/src/bin/tcp_accept.rs
@@ -12,21 +12,12 @@ use embedded_io::asynch::Write as _;
 use heapless::Vec;
 use log::*;
 use rand_core::{OsRng, RngCore};
-use static_cell::StaticCell;
+use static_cell::{make_static, StaticCell};
 
 #[path = "../tuntap.rs"]
 mod tuntap;
 
 use crate::tuntap::TunTapDevice;
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        STATIC_CELL.init_with(move || $val)
-    }};
-}
-
 #[derive(Parser)]
 #[clap(version = "1.0")]
 struct Opts {
@@ -77,7 +68,12 @@ async fn main_task(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<3>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<3>::new()),
+        seed
+    ));
 
     // Launch network task
     spawner.spawn(net_task(stack)).unwrap();
diff --git a/examples/stm32f0/Cargo.toml b/examples/stm32f0/Cargo.toml
index 9c59c45c6..ff134bb0e 100644
--- a/examples/stm32f0/Cargo.toml
+++ b/examples/stm32f0/Cargo.toml
@@ -16,4 +16,4 @@ embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["de
 embassy-executor = { version = "0.2.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "memory-x", "stm32f091rc", "time-driver-any", "exti", "unstable-pac"] }
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/stm32f3/Cargo.toml b/examples/stm32f3/Cargo.toml
index 3d314e6c5..0fe9cb122 100644
--- a/examples/stm32f3/Cargo.toml
+++ b/examples/stm32f3/Cargo.toml
@@ -23,4 +23,4 @@ futures = { version = "0.3.17", default-features = false, features = ["async-awa
 heapless = { version = "0.7.5", default-features = false }
 nb = "1.0.0"
 embedded-storage = "0.3.0"
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/stm32f4/Cargo.toml b/examples/stm32f4/Cargo.toml
index f5f8b632d..3a8efdd06 100644
--- a/examples/stm32f4/Cargo.toml
+++ b/examples/stm32f4/Cargo.toml
@@ -25,7 +25,7 @@ heapless = { version = "0.7.5", default-features = false }
 nb = "1.0.0"
 embedded-storage = "0.3.0"
 micromath = "2.0.0"
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
 chrono = { version = "^0.4", default-features = false}
 
 [profile.release]
diff --git a/examples/stm32f4/src/bin/usb_ethernet.rs b/examples/stm32f4/src/bin/usb_ethernet.rs
index c4e395f0f..d229cc3ef 100644
--- a/examples/stm32f4/src/bin/usb_ethernet.rs
+++ b/examples/stm32f4/src/bin/usb_ethernet.rs
@@ -14,20 +14,11 @@ use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState
 use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
 use embassy_usb::{Builder, UsbDevice};
 use embedded_io::asynch::Write;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 type UsbDriver = Driver<'static, embassy_stm32::peripherals::USB_OTG_FS>;
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 const MTU: usize = 1514;
 
 #[embassy_executor::task]
@@ -60,7 +51,7 @@ async fn main(spawner: Spawner) {
     let p = embassy_stm32::init(config);
 
     // Create the driver, from the HAL.
-    let ep_out_buffer = &mut singleton!([0; 256])[..];
+    let ep_out_buffer = &mut make_static!([0; 256])[..];
     let driver = Driver::new_fs(p.USB_OTG_FS, Irqs, p.PA12, p.PA11, ep_out_buffer);
 
     // Create embassy-usb Config
@@ -81,10 +72,10 @@ async fn main(spawner: Spawner) {
     let mut builder = Builder::new(
         driver,
         config,
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 128])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 128])[..],
     );
 
     // Our MAC addr.
@@ -93,14 +84,14 @@ async fn main(spawner: Spawner) {
     let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
 
     // Create classes on the builder.
-    let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
+    let class = CdcNcmClass::new(&mut builder, make_static!(State::new()), host_mac_addr, 64);
 
     // Build the builder.
     let usb = builder.build();
 
     unwrap!(spawner.spawn(usb_task(usb)));
 
-    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
+    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(make_static!(NetState::new()), our_mac_addr);
     unwrap!(spawner.spawn(usb_ncm_task(runner)));
 
     let config = embassy_net::Config::Dhcp(Default::default());
@@ -117,7 +108,12 @@ async fn main(spawner: Spawner) {
     let seed = u64::from_le_bytes(seed);
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     unwrap!(spawner.spawn(net_task(stack)));
 
diff --git a/examples/stm32f7/Cargo.toml b/examples/stm32f7/Cargo.toml
index 6ddb7186e..7a650067c 100644
--- a/examples/stm32f7/Cargo.toml
+++ b/examples/stm32f7/Cargo.toml
@@ -26,4 +26,4 @@ nb = "1.0.0"
 rand_core = "0.6.3"
 critical-section = "1.1"
 embedded-storage = "0.3.0"
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/stm32f7/src/bin/eth.rs b/examples/stm32f7/src/bin/eth.rs
index 6d286c368..d8438241c 100644
--- a/examples/stm32f7/src/bin/eth.rs
+++ b/examples/stm32f7/src/bin/eth.rs
@@ -15,18 +15,8 @@ use embassy_stm32::{bind_interrupts, eth, Config};
 use embassy_time::{Duration, Timer};
 use embedded_io::asynch::Write;
 use rand_core::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 bind_interrupts!(struct Irqs {
     ETH => eth::InterruptHandler;
 });
@@ -55,7 +45,7 @@ async fn main(spawner: Spawner) -> ! {
     let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
 
     let device = Ethernet::new(
-        singleton!(PacketQueue::<16, 16>::new()),
+        make_static!(PacketQueue::<16, 16>::new()),
         p.ETH,
         Irqs,
         p.PA1,
@@ -80,7 +70,12 @@ async fn main(spawner: Spawner) -> ! {
     //});
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     // Launch network task
     unwrap!(spawner.spawn(net_task(&stack)));
diff --git a/examples/stm32h5/Cargo.toml b/examples/stm32h5/Cargo.toml
index b9204fba8..d49a0dde7 100644
--- a/examples/stm32h5/Cargo.toml
+++ b/examples/stm32h5/Cargo.toml
@@ -30,7 +30,7 @@ critical-section = "1.1"
 micromath = "2.0.0"
 stm32-fmc = "0.2.4"
 embedded-storage = "0.3.0"
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
 
 # cargo build/run
 [profile.dev]
diff --git a/examples/stm32h5/src/bin/eth.rs b/examples/stm32h5/src/bin/eth.rs
index fa1f225fe..5d1eadf4b 100644
--- a/examples/stm32h5/src/bin/eth.rs
+++ b/examples/stm32h5/src/bin/eth.rs
@@ -16,18 +16,8 @@ use embassy_stm32::{bind_interrupts, eth, Config};
 use embassy_time::{Duration, Timer};
 use embedded_io::asynch::Write;
 use rand_core::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 bind_interrupts!(struct Irqs {
     ETH => eth::InterruptHandler;
 });
@@ -74,7 +64,7 @@ async fn main(spawner: Spawner) -> ! {
     let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
 
     let device = Ethernet::new(
-        singleton!(PacketQueue::<4, 4>::new()),
+        make_static!(PacketQueue::<4, 4>::new()),
         p.ETH,
         Irqs,
         p.PA1,
@@ -99,7 +89,12 @@ async fn main(spawner: Spawner) -> ! {
     //});
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     // Launch network task
     unwrap!(spawner.spawn(net_task(&stack)));
diff --git a/examples/stm32h7/Cargo.toml b/examples/stm32h7/Cargo.toml
index 8b534ca05..08b57f988 100644
--- a/examples/stm32h7/Cargo.toml
+++ b/examples/stm32h7/Cargo.toml
@@ -30,7 +30,7 @@ critical-section = "1.1"
 micromath = "2.0.0"
 stm32-fmc = "0.2.4"
 embedded-storage = "0.3.0"
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
 
 # cargo build/run
 [profile.dev]
diff --git a/examples/stm32h7/src/bin/eth.rs b/examples/stm32h7/src/bin/eth.rs
index dbfc90cf4..3aa7b2271 100644
--- a/examples/stm32h7/src/bin/eth.rs
+++ b/examples/stm32h7/src/bin/eth.rs
@@ -15,18 +15,8 @@ use embassy_stm32::{bind_interrupts, eth, Config};
 use embassy_time::{Duration, Timer};
 use embedded_io::asynch::Write;
 use rand_core::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 bind_interrupts!(struct Irqs {
     ETH => eth::InterruptHandler;
 });
@@ -56,7 +46,7 @@ async fn main(spawner: Spawner) -> ! {
     let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
 
     let device = Ethernet::new(
-        singleton!(PacketQueue::<16, 16>::new()),
+        make_static!(PacketQueue::<16, 16>::new()),
         p.ETH,
         Irqs,
         p.PA1,
@@ -81,7 +71,12 @@ async fn main(spawner: Spawner) -> ! {
     //});
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     // Launch network task
     unwrap!(spawner.spawn(net_task(&stack)));
diff --git a/examples/stm32h7/src/bin/eth_client.rs b/examples/stm32h7/src/bin/eth_client.rs
index 14e6b7914..575c716b6 100644
--- a/examples/stm32h7/src/bin/eth_client.rs
+++ b/examples/stm32h7/src/bin/eth_client.rs
@@ -16,18 +16,8 @@ use embassy_time::{Duration, Timer};
 use embedded_io::asynch::Write;
 use embedded_nal_async::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpConnect};
 use rand_core::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
-
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 bind_interrupts!(struct Irqs {
     ETH => eth::InterruptHandler;
 });
@@ -57,7 +47,7 @@ async fn main(spawner: Spawner) -> ! {
     let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
 
     let device = Ethernet::new(
-        singleton!(PacketQueue::<16, 16>::new()),
+        make_static!(PacketQueue::<16, 16>::new()),
         p.ETH,
         Irqs,
         p.PA1,
@@ -82,7 +72,12 @@ async fn main(spawner: Spawner) -> ! {
     //});
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     // Launch network task
     unwrap!(spawner.spawn(net_task(&stack)));
diff --git a/examples/stm32l0/Cargo.toml b/examples/stm32l0/Cargo.toml
index ffb6cdb43..235f1b0b3 100644
--- a/examples/stm32l0/Cargo.toml
+++ b/examples/stm32l0/Cargo.toml
@@ -31,4 +31,4 @@ panic-probe = { version = "0.3", features = ["print-defmt"] }
 futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
 heapless = { version = "0.7.5", default-features = false }
 embedded-hal = "0.2.6"
-static_cell = "1.0"
+static_cell = "1.1"
diff --git a/examples/stm32l5/Cargo.toml b/examples/stm32l5/Cargo.toml
index acb48c765..2ac9c180d 100644
--- a/examples/stm32l5/Cargo.toml
+++ b/examples/stm32l5/Cargo.toml
@@ -25,4 +25,4 @@ futures = { version = "0.3.17", default-features = false, features = ["async-awa
 heapless = { version = "0.7.5", default-features = false }
 rand_core = { version = "0.6.3", default-features = false }
 embedded-io = { version = "0.4.0", features = ["async"] }
-static_cell = "1.0"
+static_cell = { version = "1.1", features = ["nightly"]}
diff --git a/examples/stm32l5/src/bin/usb_ethernet.rs b/examples/stm32l5/src/bin/usb_ethernet.rs
index b84e53d3a..6163e0709 100644
--- a/examples/stm32l5/src/bin/usb_ethernet.rs
+++ b/examples/stm32l5/src/bin/usb_ethernet.rs
@@ -15,20 +15,11 @@ use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
 use embassy_usb::{Builder, UsbDevice};
 use embedded_io::asynch::Write;
 use rand_core::RngCore;
-use static_cell::StaticCell;
+use static_cell::make_static;
 use {defmt_rtt as _, panic_probe as _};
 
 type MyDriver = Driver<'static, embassy_stm32::peripherals::USB>;
 
-macro_rules! singleton {
-    ($val:expr) => {{
-        type T = impl Sized;
-        static STATIC_CELL: StaticCell<T> = StaticCell::new();
-        let (x,) = STATIC_CELL.init(($val,));
-        x
-    }};
-}
-
 const MTU: usize = 1514;
 
 bind_interrupts!(struct Irqs {
@@ -78,10 +69,10 @@ async fn main(spawner: Spawner) {
     let mut builder = Builder::new(
         driver,
         config,
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 256])[..],
-        &mut singleton!([0; 128])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 256])[..],
+        &mut make_static!([0; 128])[..],
     );
 
     // Our MAC addr.
@@ -90,14 +81,14 @@ async fn main(spawner: Spawner) {
     let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
 
     // Create classes on the builder.
-    let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
+    let class = CdcNcmClass::new(&mut builder, make_static!(State::new()), host_mac_addr, 64);
 
     // Build the builder.
     let usb = builder.build();
 
     unwrap!(spawner.spawn(usb_task(usb)));
 
-    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
+    let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(make_static!(NetState::new()), our_mac_addr);
     unwrap!(spawner.spawn(usb_ncm_task(runner)));
 
     let config = embassy_net::Config::Dhcp(Default::default());
@@ -112,7 +103,12 @@ async fn main(spawner: Spawner) {
     let seed = rng.next_u64();
 
     // Init network stack
-    let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
 
     unwrap!(spawner.spawn(net_task(stack)));