Start work on CRC_v1

embassy-stm32/src/crc/v1.rs

@@ -0,0 +1,21 @@
+use crate::pac::{CRC as PAC_CRC, RCC};
+use crate::peripherals::CRC;
+use crate::rcc::sealed::RccPeripheral;
+
+pub struct Crc {
+    _peripheral: CRC
+}
+
+impl Crc{
+    pub fn new(peripheral: CRC) -> Self{
+        // enable CRC clock in RCC.
+        CRC::enable();
+        // Reset CRC to default values.
+        CRC::reset();
+        Self { _peripheral: peripheral}
+    }
+
+    pub fn reset() {
+        unsafe { PAC_CRC.cr().modify(|w| w.set_reset(true)) };
+    }
+}