Add a Dbgmcu struct capable of enabling all relevant DBGMCU.cr fields.

Includes the addition of a `dbgmcu!(...)` macro table which currently takes
the form of

	(cr, $fn_name:ident)

where `$fn_name` is something like `set_dbgsleep_d1` etc.

The method is unsafe, since it's performing unsafe PAC operations.

Two examples modified to demonstrate its usage.

embassy-stm32/src/dbgmcu/mod.rs

@@ -0,0 +1,13 @@
+pub struct Dbgmcu {}
+
+impl Dbgmcu {
+    pub unsafe fn enable_all() {
+        crate::pac::DBGMCU.cr().modify(|cr| {
+            crate::pac::dbgmcu! {
+                (cr, $fn_name:ident) => {
+                    cr.$fn_name(true);
+                };
+            }
+        });
+    }
+}

embassy-stm32/src/lib.rs

@@ -31,6 +31,8 @@ pub mod adc;
 pub mod clock;
 #[cfg(dac)]
 pub mod dac;
+#[cfg(dbgmcu)]
+pub mod dbgmcu;
 #[cfg(all(eth, feature = "net"))]
 pub mod eth;
 #[cfg(exti)]

examples/stm32f4/src/bin/spi.rs

@@ -18,17 +18,14 @@ use embassy_stm32::pac;
 use embassy_stm32::spi::{Config, Spi};
 use embassy_stm32::time::Hertz;
 use embedded_hal::blocking::spi::Transfer;
+use embassy_stm32::dbgmcu::Dbgmcu;
 
 #[entry]
 fn main() -> ! {
     info!("Hello World, dude!");
 
     unsafe {
-        pac::DBGMCU.cr().modify(|w| {
+        Dbgmcu::enable_all();
-            w.set_dbg_sleep(true);
-            w.set_dbg_standby(true);
-            w.set_dbg_stop(true);
-        });
 
         pac::RCC.ahb1enr().modify(|w| {
             w.set_gpioaen(true);

examples/stm32h7/src/bin/usart_dma.rs

@@ -14,6 +14,7 @@ use embassy::time::Clock;
 use embassy::util::Forever;
 use embassy_stm32::dma::NoDma;
 use embassy_stm32::usart::{Config, Uart};
+use embassy_stm32::dbgmcu::Dbgmcu;
 use example_common::*;
 use embassy_traits::uart::Write as _Write;
 
@@ -72,13 +73,9 @@ fn main() -> ! {
 
     let pp = unsafe { pac::Peripherals::steal() };
 
-    pp.DBGMCU.cr.modify(|_, w| {
+    unsafe {
-        w.dbgsleep_d1().set_bit();
+        Dbgmcu::enable_all();
-        w.dbgstby_d1().set_bit();
+    }
-        w.dbgstop_d1().set_bit();
-        w.d1dbgcken().set_bit();
-        w
-    });
 
     pp.RCC.ahb4enr.modify(|_, w| {
         w.gpioaen().set_bit();

stm32-metapac-gen/src/lib.rs

@@ -10,6 +10,7 @@ use std::path::Path;
 use std::path::PathBuf;
 
 use chiptool::{generate, ir, transform};
+use chiptool::util::ToSanitizedSnakeCase;
 
 #[derive(Debug, Eq, PartialEq, Clone, Deserialize)]
 pub struct Chip {
@@ -245,6 +246,21 @@ pub fn gen(options: Options) {
             peripherals: Vec::new(),
         };
 
+        // Load DBGMCU register for chip
+        let mut dbgmcu: Option<ir::IR> = core.peripherals.iter().find_map(|(name, p)| {
+            if name == "DBGMCU" {
+                p.block.as_ref().map(|block| {
+                    let bi = BlockInfo::parse(block);
+                    let dbgmcu_reg_path = data_dir
+                        .join("registers")
+                        .join(&format!("{}_{}.yaml", bi.module, bi.version));
+                    serde_yaml::from_reader(File::open(dbgmcu_reg_path).unwrap()).unwrap()
+                })
+            } else {
+                None
+            }
+        });
+
         // Load RCC register for chip
         let rcc = core.peripherals.iter().find_map(|(name, p)| {
             if name == "RCC" {
@@ -270,12 +286,24 @@ pub fn gen(options: Options) {
         let mut peripheral_dma_channels_table: Vec<Vec<String>> = Vec::new();
         let mut peripheral_counts: HashMap<String, u8> = HashMap::new();
         let mut dma_channel_counts: HashMap<String, u8> = HashMap::new();
+        let mut dbgmcu_table: Vec<Vec<String>> = Vec::new();
 
         let gpio_base = core.peripherals.get(&"GPIOA".to_string()).unwrap().address;
         let gpio_stride = 0x400;
 
         let number_suffix_re = Regex::new("^(.*?)[0-9]*$").unwrap();
 
+        if let Some(ref mut reg) = dbgmcu {
+            if let Some(ref cr) = reg.fieldsets.get("CR")  {
+                for field in cr.fields.iter().filter(|e| e.name.contains("DBG")) {
+                    let mut fn_name = String::new();
+                    fn_name.push_str("set_");
+                    fn_name.push_str( &field.name.to_sanitized_snake_case() );
+                    dbgmcu_table.push( vec!( "cr".into(), fn_name ));
+                }
+            }
+        }
+
         let mut has_bdma = false;
         let mut has_dma = false;
 
@@ -559,6 +587,7 @@ pub fn gen(options: Options) {
         );
         make_table(&mut extra, "peripheral_rcc", &peripheral_rcc_table);
         make_table(&mut extra, "dma_channels", &dma_channels_table);
+        make_table(&mut extra, "dbgmcu", &dbgmcu_table);
         make_peripheral_counts(&mut extra, &peripheral_counts);
         make_dma_channel_counts(&mut extra, &dma_channel_counts);