boards: fixed STM systick frequency

Initialized the systick with the correct frequency. The default one provided by the SYST_CALIB register is fixed for the STM chips and does not reflect the actual systick frequency.
YoeDistro · Sep 30, 2024 · a45c6e7 · a45c6e7
1 parent e2128ba
commit a45c6e7
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Showing 6 changed files with 22 additions and 6 deletions.
diff --git a/boards/nucleo_f429zi/src/main.rs b/boards/nucleo_f429zi/src/main.rs
@@ -24,6 +24,7 @@ use kernel::scheduler::round_robin::RoundRobinSched;
 use kernel::{create_capability, debug, static_init};
 
 use stm32f429zi::chip_specs::Stm32f429Specs;
+use stm32f429zi::clocks::hsi::HSI_FREQUENCY_MHZ;
 use stm32f429zi::gpio::{AlternateFunction, Mode, PinId, PortId};
 use stm32f429zi::interrupt_service::Stm32f429ziDefaultPeripherals;
 
@@ -663,7 +664,9 @@ unsafe fn start() -> (
         rng,
 
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        systick: cortexm4::systick::SysTick::new_with_calibration(
+            (HSI_FREQUENCY_MHZ * 1_000_000) as u32,
+        ),
         can,
         date_time,
     };

diff --git a/boards/nucleo_f446re/src/main.rs b/boards/nucleo_f446re/src/main.rs
@@ -24,6 +24,7 @@ use kernel::platform::{KernelResources, SyscallDriverLookup};
 use kernel::scheduler::round_robin::RoundRobinSched;
 use kernel::{create_capability, debug, static_init};
 use stm32f446re::chip_specs::Stm32f446Specs;
+use stm32f446re::clocks::hsi::HSI_FREQUENCY_MHZ;
 use stm32f446re::gpio::{AlternateFunction, Mode, PinId, PortId};
 use stm32f446re::interrupt_service::Stm32f446reDefaultPeripherals;
 
@@ -507,7 +508,9 @@ unsafe fn start() -> (
         gpio,
 
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        systick: cortexm4::systick::SysTick::new_with_calibration(
+            (HSI_FREQUENCY_MHZ * 1_000_000) as u32,
+        ),
     };
 
     // // Optional kernel tests

diff --git a/boards/stm32f3discovery/src/main.rs b/boards/stm32f3discovery/src/main.rs
@@ -806,7 +806,8 @@ unsafe fn start() -> (
         nonvolatile_storage,
 
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        // Systick uses the HSI, which runs at 8MHz
+        systick: cortexm4::systick::SysTick::new_with_calibration(8_000_000),
         watchdog: &peripherals.watchdog,
     };
 

diff --git a/boards/stm32f412gdiscovery/src/main.rs b/boards/stm32f412gdiscovery/src/main.rs
@@ -25,6 +25,7 @@ use kernel::platform::{KernelResources, SyscallDriverLookup};
 use kernel::scheduler::round_robin::RoundRobinSched;
 use kernel::{create_capability, debug, static_init};
 use stm32f412g::chip_specs::Stm32f412Specs;
+use stm32f412g::clocks::hsi::HSI_FREQUENCY_MHZ;
 use stm32f412g::interrupt_service::Stm32f412gDefaultPeripherals;
 
 /// Support routines for debugging I/O.
@@ -766,7 +767,9 @@ unsafe fn start() -> (
         rng,
 
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        systick: cortexm4::systick::SysTick::new_with_calibration(
+            (HSI_FREQUENCY_MHZ * 1_000_000) as u32,
+        ),
     };
 
     // // Optional kernel tests

diff --git a/boards/stm32f429idiscovery/src/main.rs b/boards/stm32f429idiscovery/src/main.rs
@@ -24,6 +24,7 @@ use kernel::scheduler::round_robin::RoundRobinSched;
 use kernel::{create_capability, debug, static_init};
 
 use stm32f429zi::chip_specs::Stm32f429Specs;
+use stm32f429zi::clocks::hsi::HSI_FREQUENCY_MHZ;
 use stm32f429zi::gpio::{AlternateFunction, Mode, PinId, PortId};
 use stm32f429zi::interrupt_service::Stm32f429ziDefaultPeripherals;
 
@@ -591,7 +592,9 @@ unsafe fn start() -> (
         gpio,
 
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        systick: cortexm4::systick::SysTick::new_with_calibration(
+            (HSI_FREQUENCY_MHZ * 1_000_000) as u32,
+        ),
     };
 
     // // Optional kernel tests

diff --git a/boards/weact_f401ccu6/src/main.rs b/boards/weact_f401ccu6/src/main.rs
@@ -24,6 +24,7 @@ use kernel::scheduler::round_robin::RoundRobinSched;
 use kernel::{create_capability, debug, static_init};
 
 use stm32f401cc::chip_specs::Stm32f401Specs;
+use stm32f401cc::clocks::hsi::HSI_FREQUENCY_MHZ;
 use stm32f401cc::interrupt_service::Stm32f401ccDefaultPeripherals;
 
 /// Support routines for debugging I/O.
@@ -448,7 +449,9 @@ unsafe fn start() -> (
         alarm,
         gpio,
         scheduler,
-        systick: cortexm4::systick::SysTick::new(),
+        systick: cortexm4::systick::SysTick::new_with_calibration(
+            (HSI_FREQUENCY_MHZ * 1_000_000) as u32,
+        ),
     };
 
     debug!("Initialization complete. Entering main loop");