Fix usb otg build (#293)

* fugit::Rate<u32> can't access the raw member. Use `to_Hz()` instead

* resolve warnings is usb related files

* add `additional-features` to mcu matrix to allow for specific features in ci (only some are usb capable)

* fix device definition for L4+ devices, fix missing PAC support for L475 usb OTG

.github/workflows/ci.yml

@@ -12,25 +12,23 @@ jobs:
       matrix: # All permutations of {rust, mcu}
         rust:
           - stable
-        mcu:
-          - stm32l412
-          - stm32l422
-          - stm32l431
-          - stm32l432
-          - stm32l433
-          - stm32l442
-          - stm32l443
-          - stm32l451
-          - stm32l452
-          - stm32l462
-          - stm32l471
-          - stm32l475
-          - stm32l476
-          - stm32l486
-          - stm32l496
-          - stm32l4a6
-          #- stm32l4r9
-          #- stm32l4s9
+        mcu: # Note leading comma is required if any additional fetures are specified
+          - { id: stm32l412, additional-features: ",stm32-usbd" }
+          - { id: stm32l422, additional-features: ",stm32-usbd" }
+          - { id: stm32l431, additional-features: "" }
+          - { id: stm32l432, additional-features: ",stm32-usbd" }
+          - { id: stm32l433, additional-features: ",stm32-usbd" }
+          - { id: stm32l442, additional-features: ",stm32-usbd" }
+          - { id: stm32l443, additional-features: ",stm32-usbd" }
+          - { id: stm32l451, additional-features: "" }
+          - { id: stm32l452, additional-features: ",stm32-usbd" }
+          - { id: stm32l462, additional-features: ",stm32-usbd" }
+          - { id: stm32l471, additional-features: "" }
+          - { id: stm32l475, additional-features: "" } # USB_OTG not supported by PAC
+          - { id: stm32l476, additional-features: ",otg_fs" }
+          - { id: stm32l486, additional-features: ",otg_fs" }
+          - { id: stm32l496, additional-features: ",otg_fs" }
+          - { id: stm32l4a6, additional-features: ",otg_fs" }
 
     steps:
       - uses: actions/checkout@v2
@@ -45,12 +43,12 @@ jobs:
         with:
           use-cross: true
           command: build
-          args: --verbose --release --examples --target thumbv7em-none-eabihf --features rt,unproven,${{ matrix.mcu }}
+          args: --verbose --release --examples --target thumbv7em-none-eabihf --features rt,unproven,${{ matrix.mcu.id }}${{ matrix.mcu.additional-features }}
       - name: test
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --lib --target x86_64-unknown-linux-gnu --features rt,unproven,${{ matrix.mcu }}
+          args: --lib --target x86_64-unknown-linux-gnu --features rt,unproven,${{ matrix.mcu.id }}${{ matrix.mcu.additional-features }}
 
   ci-r9:
     runs-on: ubuntu-latest
@@ -59,8 +57,8 @@ jobs:
         rust:
           - stable
         mcu:
-          - stm32l4r9
-          - stm32l4s9
+          - { id: stm32l4r9, additional-features: "" }
+          - { id: stm32l4s9, additional-features: "" }
 
     steps:
       - uses: actions/checkout@v2
@@ -75,10 +73,10 @@ jobs:
         with:
           use-cross: true
           command: build
-          args: --verbose --release --target thumbv7em-none-eabihf --features rt,unproven,${{ matrix.mcu }}
+          args: --verbose --release --target thumbv7em-none-eabihf --features rt,unproven,${{ matrix.mcu.id }}${{ matrix.mcu.additional-features }}
       # note that examples were not built
       - name: test
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --lib --target x86_64-unknown-linux-gnu --features rt,unproven,${{ matrix.mcu }}
+          args: --lib --target x86_64-unknown-linux-gnu --features rt,unproven,${{ matrix.mcu.id }}${{ matrix.mcu.additional-features }}

examples/otg_fs_serial.rs

@@ -39,62 +39,12 @@ fn enable_usb_pwr() {
     pwr.cr2.modify(|_, w| w.usv().set_bit());
 }
 
-/// Reset peripherals to known state.
-unsafe fn reset_peripherals(dp: &Peripherals) {
-    dp.RCC.cr.modify(|_, w| w.msion().set_bit());
-    dp.RCC.cfgr.modify(|_, w| {
-        w.sw().bits(0);
-        w.hpre().bits(0);
-        w.ppre1().bits(0);
-        w.ppre2().bits(0);
-        w.mcosel().bits(0);
-        w
-    });
-    dp.RCC.cr.modify(|_, w| {
-        w.pllsai2on().clear_bit();
-        w.pllsai1on().clear_bit();
-        w.pllon().clear_bit();
-        w.hsion().clear_bit();
-        w.csson().clear_bit();
-        w.hseon().clear_bit();
-        w
-    });
-    dp.RCC.pllcfgr.modify(|_, w| {
-        w.pllpdiv().bits(0);
-        w.pllr().bits(0);
-        w.pllren().clear_bit();
-        w.pllq().bits(0);
-        w.pllqen().clear_bit();
-        w.pllp().clear_bit();
-        w.pllpen().clear_bit();
-        w.plln().bits(1 << 4);
-        w.pllm().bits(0);
-        w.pllsrc().bits(0);
-        w
-    });
-
-    dp.RCC.crrcr.modify(|_, w| w.hsi48on().clear_bit());
-    dp.RCC.cr.modify(|_, w| w.hsebyp().clear_bit());
-
-    dp.RCC.pllcfgr.modify(|_, w| {
-        w.pllsrc().bits(0);
-        w.pllpdiv().bits(0);
-        w
-    });
-
-    dp.RCC.cier.reset();
-
-    dp.FLASH.acr.modify(|_, w| w.bits(4));
-}
-
 static mut EP_MEMORY: [u32; 1024] = [0; 1024];
 
 #[entry]
 unsafe fn main() -> ! {
     let dp = Peripherals::take().unwrap();
 
-    //reset_peripherals(&dp);
-
     let mut flash = dp.FLASH.constrain();
     let mut rcc = dp.RCC.constrain();
     let mut pwr = dp.PWR.constrain(&mut rcc.apb1r1);

src/otg_fs.rs

@@ -45,7 +45,7 @@ unsafe impl UsbPeripheral for USB {
     }
 
     fn ahb_frequency_hz(&self) -> u32 {
-        self.hclk.0
+        self.hclk.to_Hz()
     }
 }
 

src/usb.rs

@@ -6,7 +6,7 @@
 //! for usage examples.
 
 use crate::rcc::{Enable, Reset};
-use crate::stm32::{RCC, USB};
+use crate::stm32::USB;
 use stm32_usbd::UsbPeripheral;
 
 use crate::gpio::gpioa::{PA11, PA12};