Fix mass-erase trigger on "small" devices.

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added Interruptable trait to Alternate mode pins
 - Added a "low pin count" variant of the f730 chip to the crate features: packages <144 pins don't include a high speed USB PHY
 - Added SPI2_SCK pin for stm32f769i-discovery
+- Fix mass-erase triggering in `flash` on smaller chips
 
 ## [v0.7.0] - 2022-06-05
 

examples/serial_dma.rs

@@ -57,7 +57,7 @@ fn main() -> ! {
     // function won't return as long as the program runs, so there's no chance
     // of anyone else using the same static.
     static mut BUFFER: [u8; 4] = [0; 4];
-    let mut buffer = unsafe { Pin::new(&mut BUFFER) };
+    let mut buffer = unsafe { Pin::new(&mut *core::ptr::addr_of_mut!(BUFFER)) };
     loop {
         // Read using DMA
         let mut transfer = rx.read_all(buffer, &dma, rx_stream);

examples/spi_dma.rs

@@ -60,7 +60,7 @@ fn main() -> ! {
     // function won't return as long as the program runs, so there's no chance
     // of anyone else using the same static.
     static mut BUFFER: [u8; 2] = [0; 2];
-    let mut buffer = unsafe { Pin::new(&mut BUFFER) };
+    let mut buffer = unsafe { Pin::new(&mut *core::ptr::addr_of_mut!(BUFFER)) };
 
     loop {
         // Read WHO_AM_I register of an MPU9250 sensor.

examples/spi_dma_16.rs

@@ -56,7 +56,7 @@ fn main() -> ! {
     // function won't return as long as the program runs, so there's no chance
     // of anyone else using the same static.
     static mut BUFFER: [u16; 1] = [0; 1];
-    let mut buffer = unsafe { Pin::new(&mut BUFFER) };
+    let mut buffer = unsafe { Pin::new(&mut *core::ptr::addr_of_mut!(BUFFER)) };
 
     // Use a button to control output via the Maxim Integrated MAX5214 DAC.
     loop {

examples/stm32f7disco-qspi-flash/main.rs

@@ -123,8 +123,8 @@ fn memory_example_dma(
 
     // Create pinned versions for DMA transfers
     let mut stream = stream;
-    let mut read_buffer = unsafe { Pin::new(&mut READ_BUFFER) };
-    let mut page_buffer = unsafe { Pin::new(&mut PAGE_BUFFER) };
+    let mut read_buffer = unsafe { Pin::new(&mut *core::ptr::addr_of_mut!(READ_BUFFER)) };
+    let mut page_buffer = unsafe { Pin::new(&mut *core::ptr::addr_of_mut!(PAGE_BUFFER)) };
 
     ///////////////////////
     // Test erase + read //

examples/stm32f7disco-screen/main.rs

@@ -103,7 +103,7 @@ fn main() -> ! {
     let mut display = screen::Stm32F7DiscoDisplay::new(perif.LTDC, perif.DMA2D);
     display
         .controller
-        .config_layer(Layer::L1, unsafe { &mut FB_LAYER1 }, PixelFormat::RGB565);
+        .config_layer(Layer::L1, unsafe { &mut *core::ptr::addr_of_mut!(FB_LAYER1) }, PixelFormat::RGB565);
 
     display.controller.enable_layer(Layer::L1);
     display.controller.reload();

src/flash.rs

@@ -220,7 +220,7 @@ impl<'a> EraseSequence<'a> {
                 feature = "stm32f778",
                 feature = "stm32f779",
             )))]
-            w.mer().clear_bit();
+            w.mer().set_bit();
             w.ser().clear_bit()
         });