add v3d register

src/lib.rs

@@ -17,3 +17,4 @@ pub mod mini_uart;
 pub mod pwm;
 pub mod qa7_control;
 pub mod timer;
+pub mod v3d;

src/v3d.rs

@@ -0,0 +1,34 @@
+use crate::addr::IO_BASE;
+use volatile::{Volatile};
+
+/// The base address for the `MU` registers.
+const V3D_BASE: usize = IO_BASE + 0xC00000;
+
+#[repr(C)]
+#[allow(non_snake_case)]
+struct Registers {
+    pub regs: [Volatile<u32>; 969]
+}
+
+pub struct V3d {
+    registers: &'static mut Registers,
+}
+
+impl V3d {
+    /// Returns a new instance of `Mailbox`.
+    #[inline]
+    pub fn new() -> V3d {
+        V3d {
+            registers: unsafe { &mut *(V3D_BASE as *mut Registers) },
+        }
+    }
+
+    pub fn read(&self, pos: usize) -> u32 {
+       	self.registers.regs[pos].read()
+    }
+
+    pub fn write(&mut self, pos: usize, data: u32) {
+        self.registers.regs[pos]
+            .write(data);
+    }
+}