Merge #1284

1284: Fix APB clock calculation for several STM32 families r=Dirbaio a=ericyanush

This PR fixes #1283

Co-authored-by: Eric Yanush <eric@yanu.sh>

embassy-stm32/src/rcc/l0.rs

@@ -313,7 +313,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: Ppre = pre.into();
             let pre: u8 = 1 << (pre.0 - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/l1.rs

@@ -314,7 +314,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: Ppre = pre.into();
             let pre: u8 = 1 << (pre.0 - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/l4.rs

@@ -483,7 +483,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: Ppre = pre.into();
             let pre: u8 = 1 << (pre.0 - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/l5.rs

@@ -481,7 +481,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: Ppre = pre.into();
             let pre: u8 = 1 << (pre.0 - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/u5.rs

@@ -481,7 +481,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: u8 = pre.into();
             let pre: u8 = 1 << (pre - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };
@@ -491,7 +491,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: u8 = pre.into();
             let pre: u8 = 1 << (pre - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/wb.rs

@@ -151,7 +151,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: u8 = pre.into();
             let pre: u8 = 1 << (pre - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };

embassy-stm32/src/rcc/wl.rs

@@ -240,7 +240,7 @@ pub(crate) unsafe fn init(config: Config) {
         pre => {
             let pre: u8 = pre.into();
             let pre: u8 = 1 << (pre - 3);
-            let freq = ahb_freq / (1 << (pre as u8 - 3));
+            let freq = ahb_freq / pre as u32;
             (freq, freq * 2)
         }
     };