Diff: drivers/CAN.cpp

Revision:

175:b96e65c34a4d

Parent:

170:e3b6fe271b81

Child:

176:af195413fb11

--- a/drivers/CAN.cpp	Fri Sep 15 14:59:18 2017 +0100
+++ b/drivers/CAN.cpp	Mon Oct 02 15:33:19 2017 +0100
@@ -18,16 +18,15 @@
 #if DEVICE_CAN
 
 #include "cmsis.h"
+#include "platform/mbed_sleep.h"
 
 namespace mbed {
 
-static void donothing() {}
-
 CAN::CAN(PinName rd, PinName td) : _can(), _irq() {
     // No lock needed in constructor
 
     for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
-        _irq[i] = callback(donothing);
+        _irq[i] = NULL;
     }
 
     can_init(&_can, rd, td);
@@ -38,7 +37,7 @@
     // No lock needed in constructor
 
     for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
-        _irq[i].attach(donothing);
+        _irq[i] = NULL;
     }
 
     can_init_freq(&_can, rd, td, hz);
@@ -115,10 +114,18 @@
 void CAN::attach(Callback<void()> func, IrqType type) {
     lock();
     if (func) {
+        // lock deep sleep only the first time
+        if (!_irq[(CanIrqType)type]) {
+            sleep_manager_lock_deep_sleep();
+        }
         _irq[(CanIrqType)type] = func;
         can_irq_set(&_can, (CanIrqType)type, 1);
     } else {
-        _irq[(CanIrqType)type] = callback(donothing);
+        // unlock deep sleep only the first time
+        if (_irq[(CanIrqType)type]) {
+            sleep_manager_unlock_deep_sleep();
+        }
+        _irq[(CanIrqType)type] = NULL;
         can_irq_set(&_can, (CanIrqType)type, 0);
     }
     unlock();
@@ -126,7 +133,9 @@
 
 void CAN::_irq_handler(uint32_t id, CanIrqType type) {
     CAN *handler = (CAN*)id;
-    handler->_irq[type].call();
+    if (handler->_irq[type]) {
+        handler->_irq[type].call();
+    }
 }
 
 void CAN::lock() {