Auto merge of #50 - japaric:singletons, r=japaric

Peripherals as scoped singletons

See this RFC for details: japaric/svd2rust#157

- The first commit adapts this crate to the changes in japaric/cortex-m#65 and japaric/svd2rust#158
- ~~The second commit is an alternative implementation of RFC #47 (there's another implementation in #49. This second commit is not required for RFC157 but let us experiment with safe DMA abstractions.~~ postponed

### TODO

- [x] un-bless peripherals as resources. Peripherals as resources were special cased: if resource listed in e.g. `app.tasks.FOO.resources` didn't appear in `app.resources` then it was assumed to be a peripheral and special code was generated for it. This is no longer required under RFC157.

~~This depends on PR japaric/rtfm-syntax#2~~ postponed

1 files changed, 11 insertions, 1 deletions

diff --git a/examples/generics.rs b/examples/generics.rs
index 57c9b8eb..afcafa0a 100644
--- a/examples/generics.rs
+++ b/examples/generics.rs
@@ -12,6 +12,11 @@ use stm32f103xx::{SPI1, GPIOA};
 app! {
     device: stm32f103xx,
 
+    resources: {
+        static GPIOA: GPIOA;
+        static SPI1: SPI1;
+    },
+
     tasks: {
         EXTI0: {
             path: exti0,
@@ -27,7 +32,12 @@ app! {
     },
 }
 
-fn init(_p: init::Peripherals) {}
+fn init(p: init::Peripherals) -> init::LateResourceValues {
+    init::LateResourceValues {
+        GPIOA: p.device.GPIOA,
+        SPI1: p.device.SPI1,
+    }
+}
 
 fn idle() -> ! {
     loop {