Fixed some bugs

Author: David-OConnor

Cargo.toml

@@ -69,6 +69,7 @@ paste = "^1.0.4"  # Token pasting, to make macros easier
 
 [package.metadata.docs.rs]
 features = ["h735", "h7rt", "usbotg_hs", "can_fd_h", "embedded_hal"]
+#features = ["g641", "g4rt", "usb", "can_fd_g", "embedded_hal"]
 targets = ["thumbv7em-none-eabihf"]
 
 

src/dma.rs

@@ -1972,6 +1972,8 @@ pub fn mux(periph: DmaPeriph, channel: DmaChannel, input: DmaInput) {
     unsafe {
         let mux = unsafe { &(*DMAMUX::ptr()) };
 
+        #[cfg(feature = "g4")]
+        let rcc = unsafe { &(*RCC::ptr()) };
         #[cfg(feature = "g4")]
         rcc.ahb1enr.modify(|_, w| w.dmamuxen().set_bit());