adds timer-driver for tim21 and tim22 (on L0)

3 files changed, 32 insertions, 2 deletions

diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index f1539229f..1280f372e 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -139,6 +139,10 @@ time-driver-tim11 = ["_time-driver"]
 time-driver-tim12 = ["_time-driver"]
 ## Use TIM15 as time driver
 time-driver-tim15 = ["_time-driver"]
+## Use TIM21 as time driver
+time-driver-tim22 = ["_time-driver"]
+## Use TIM22 as time driver
+time-driver-tim22 = ["_time-driver"]
 
 
 #! ## Analog Switch Pins (Pxy_C) on STM32H7 series
diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index ef152acd1..948ce3aff 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -191,6 +191,8 @@ fn main() {
         Some("tim11") => "TIM11",
         Some("tim12") => "TIM12",
         Some("tim15") => "TIM15",
+        Some("tim21") => "TIM21",
+        Some("tim22") => "TIM22",
         Some("any") => {
             if singletons.contains(&"TIM2".to_string()) {
                 "TIM2"
@@ -208,6 +210,10 @@ fn main() {
                 "TIM12"
             } else if singletons.contains(&"TIM15".to_string()) {
                 "TIM15"
+            } else if singletons.contains(&"TIM21".to_string()) {
+                "TIM21"
+            } else if singletons.contains(&"TIM22".to_string()) {
+                "TIM22"
             } else {
                 panic!("time-driver-any requested, but the chip doesn't have TIM2, TIM3, TIM4, TIM5, TIM9, TIM11, TIM12 or TIM15.")
             }
diff --git a/embassy-stm32/src/time_driver.rs b/embassy-stm32/src/time_driver.rs
index 0dbadce0c..d613394ef 100644
--- a/embassy-stm32/src/time_driver.rs
+++ b/embassy-stm32/src/time_driver.rs
@@ -28,10 +28,10 @@ use crate::{interrupt, peripherals};
 // available after reserving CC1 for regular time keeping. For example, TIM2 has four CC registers:
 // CC1, CC2, CC3, and CC4, so it can provide ALARM_COUNT = 3.
 
-#[cfg(not(any(time_driver_tim12, time_driver_tim15)))]
+#[cfg(not(any(time_driver_tim12, time_driver_tim15, time_driver_tim21, time_driver_tim22)))]
 const ALARM_COUNT: usize = 3;
 
-#[cfg(any(time_driver_tim12, time_driver_tim15))]
+#[cfg(any(time_driver_tim12, time_driver_tim15, time_driver_tim21, time_driver_tim22))]
 const ALARM_COUNT: usize = 1;
 
 #[cfg(time_driver_tim2)]
@@ -50,6 +50,10 @@ type T = peripherals::TIM11;
 type T = peripherals::TIM12;
 #[cfg(time_driver_tim15)]
 type T = peripherals::TIM15;
+#[cfg(time_driver_tim21)]
+type T = peripherals::TIM21;
+#[cfg(time_driver_tim22)]
+type T = peripherals::TIM22;
 
 foreach_interrupt! {
     (TIM2, timer, $block:ident, UP, $irq:ident) => {
@@ -116,6 +120,22 @@ foreach_interrupt! {
             DRIVER.on_interrupt()
         }
     };
+    (TIM21, timer, $block:ident, UP, $irq:ident) => {
+        #[cfg(time_driver_tim21)]
+        #[cfg(feature = "rt")]
+        #[interrupt]
+        fn $irq() {
+            DRIVER.on_interrupt()
+        }
+    };  
+    (TIM22, timer, $block:ident, UP, $irq:ident) => {
+        #[cfg(time_driver_tim22)]
+        #[cfg(feature = "rt")]
+        #[interrupt]
+        fn $irq() {
+            DRIVER.on_interrupt()
+        }
+    };    
 }
 
 // Clock timekeeping works with something we call "periods", which are time intervals