From 12c510f22258af1a26ee47ee1ae07c6ebdb7ac65 Mon Sep 17 00:00:00 2001
From: Bob McWhirter <bmcwhirt@redhat.com>
Date: Wed, 5 May 2021 13:12:53 -0400
Subject: [PATCH] Rework `pac` re-exporting, canonicalize syscfg path, use it
 plus SYSCFG_BASE.

---
 embassy-stm32/src/exti.rs |  3 +--
 embassy-stm32/src/lib.rs  | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/embassy-stm32/src/exti.rs b/embassy-stm32/src/exti.rs
index 9b2370f3..8fd9d91a 100644
--- a/embassy-stm32/src/exti.rs
+++ b/embassy-stm32/src/exti.rs
@@ -15,8 +15,7 @@ use crate::interrupt;
 use crate::pac;
 use crate::peripherals;
 
-// TODO hardcoding peripheral addrs until we figure out how these are handled in the metapac
-const SYSCFG: pac::syscfg_f4::Syscfg = pac::syscfg_f4::Syscfg(0x40013800 as *mut _);
+const SYSCFG: pac::syscfg::Syscfg = pac::syscfg::Syscfg(crate::chip::SYSCFG_BASE as *mut _);
 const   EXTI: pac::exti::Exti = pac::exti::Exti(crate::chip::EXTI_BASE as *mut _);
 
 const EXTI_COUNT: usize = 16;
diff --git a/embassy-stm32/src/lib.rs b/embassy-stm32/src/lib.rs
index 4ea5f952..de697eac 100644
--- a/embassy-stm32/src/lib.rs
+++ b/embassy-stm32/src/lib.rs
@@ -10,7 +10,18 @@
 pub mod fmt;
 
 use embassy::interrupt::{Interrupt, InterruptExt};
-pub(crate) use stm32_metapac as pac;
+//pub(crate) use stm32_metapac as pac;
+
+pub mod pac {
+    pub use stm32_metapac::*;
+
+    #[cfg(any(feature = "_syscfg_f4"))]
+    pub use stm32_metapac::syscfg_f4 as syscfg;
+
+    #[cfg(any(feature = "_syscfg_l4"))]
+    pub use stm32_metapac::syscfg_l4 as syscfg;
+}
+
 
 #[macro_use]
 pub mod exti;