turn peripherals into scoped singletons

1 files changed, 50 insertions, 0 deletions

diff --git a/src/peripheral/dwt.rs b/src/peripheral/dwt.rs
new file mode 100644
index 0000000..b716369
--- /dev/null
+++ b/src/peripheral/dwt.rs
@@ -0,0 +1,50 @@
+//! Data Watchpoint and Trace unit
+
+use volatile_register::{RO, RW, WO};
+
+/// Register block
+#[repr(C)]
+pub struct RegisterBlock {
+    /// Control
+    pub ctrl: RW<u32>,
+    /// Cycle Count
+    pub cyccnt: RW<u32>,
+    /// CPI Count
+    pub cpicnt: RW<u32>,
+    /// Exception Overhead Count
+    pub exccnt: RW<u32>,
+    /// Sleep Count
+    pub sleepcnt: RW<u32>,
+    /// LSU Count
+    pub lsucnt: RW<u32>,
+    /// Folded-instruction Count
+    pub foldcnt: RW<u32>,
+    /// Program Counter Sample
+    pub pcsr: RO<u32>,
+    /// Comparators
+    pub c: [Comparator; 16],
+    reserved: [u32; 932],
+    /// Lock Access
+    pub lar: WO<u32>,
+    /// Lock Status
+    pub lsr: RO<u32>,
+}
+
+impl RegisterBlock {
+    /// Enables the cycle counter
+    pub fn enable_cycle_counter(&self) {
+        unsafe { self.ctrl.modify(|r| r | 1) }
+    }
+}
+
+/// Comparator
+#[repr(C)]
+pub struct Comparator {
+    /// Comparator
+    pub comp: RW<u32>,
+    /// Comparator Mask
+    pub mask: RW<u32>,
+    /// Comparator Function
+    pub function: RW<u32>,
+    reserved: u32,
+}