Add API to set ticker IRQ handler.

hal/lp_ticker_api.h

@@ -34,6 +34,19 @@ extern "C" {
  * @{
  */
 
+typedef void (*ticker_irq_handler_type)(const ticker_data_t *const);
+
+/** Set low power ticker IRQ handler
+ *
+ * @param ticker_irq_handler IRQ handler to be connected
+ *
+ * @return previous ticker IRQ handler
+ *
+ * @note by default IRQ handler is set to ticker_irq_handler()
+ *
+ */
+ticker_irq_handler_type set_lp_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler);
+
 /** Get low power ticker's data
  *
  * @return The low power ticker data

hal/mbed_lp_ticker_api.c

@@ -19,6 +19,8 @@
 
 static ticker_event_queue_t events = { 0 };
 
+static ticker_irq_handler_type irq_handler = ticker_irq_handler;
+
 static const ticker_interface_t lp_interface = {
     .init = lp_ticker_init,
     .read = lp_ticker_read,
@@ -38,9 +40,20 @@ const ticker_data_t* get_lp_ticker_data(void)
     return &lp_data;
 }
 
+ticker_irq_handler_type set_lp_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler)
+{
+    ticker_irq_handler_type prev_irq_handler = irq_handler;
+
+    irq_handler = ticker_irq_handler;
+
+    return prev_irq_handler;
+}
+
 void lp_ticker_irq_handler(void)
 {
-    ticker_irq_handler(&lp_data);
+    if (irq_handler) {
+        irq_handler(&lp_data);
+    }
 }
 
 #endif

hal/mbed_us_ticker_api.c

@@ -17,6 +17,8 @@
 
 static ticker_event_queue_t events = { 0 };
 
+static ticker_irq_handler_type irq_handler = ticker_irq_handler;
+
 static const ticker_interface_t us_interface = {
     .init = us_ticker_init,
     .read = us_ticker_read,
@@ -36,7 +38,18 @@ const ticker_data_t* get_us_ticker_data(void)
     return &us_data;
 }
 
+ticker_irq_handler_type set_us_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler)
+{
+    ticker_irq_handler_type prev_irq_handler = irq_handler;
+
+    irq_handler = ticker_irq_handler;
+
+    return prev_irq_handler;
+}
+
 void us_ticker_irq_handler(void)
 {
-    ticker_irq_handler(&us_data);
+    if (irq_handler) {
+        irq_handler(&us_data);
+    }
 }

hal/us_ticker_api.h

@@ -31,6 +31,19 @@ extern "C" {
  * @{
  */
 
+typedef void (*ticker_irq_handler_type)(const ticker_data_t *const);
+
+/** Set ticker IRQ handler
+ *
+ * @param ticker_irq_handler IRQ handler to be connected
+ *
+ * @return previous ticker IRQ handler
+ *
+ * @note by default IRQ handler is set to ticker_irq_handler()
+ *
+ */
+ticker_irq_handler_type set_us_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler);
+
 /** Get ticker's data
  *
  * @return The low power ticker data