Add default interrupt handler for Freescale NMI_b pins.

Author: sg-

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL05Z/gpio_irq_api.c

@@ -37,7 +37,9 @@ static void handle_interrupt_in(PORT_Type *port, int ch_base) {
         if (port->ISFR & pmask) {
             mask |= pmask;
             uint32_t id = channel_ids[ch_base + i];
-            if (id == 0) continue;
+            if (id == 0) {
+                continue;
+            }
 
             FGPIO_Type *gpio;
             gpio_irq_event event = IRQ_NONE;
@@ -170,3 +172,13 @@ void gpio_irq_disable(gpio_irq_t *obj) {
         NVIC_DisableIRQ(PORTB_IRQn);
     }
 }
+
+// Change the NMI pin to an input. This allows NMI pin to 
+//  be used as a low power mode wakeup.  The application will
+//  need to change the pin back to NMI_b or wakeup only occurs once!
+extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction);
+void NMI_Handler(void)
+{
+    gpio_t gpio;
+    gpio_init(&gpio, PTB5, PIN_INPUT);
+}

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/gpio_irq_api.c

@@ -37,7 +37,9 @@ static void handle_interrupt_in(PORT_Type *port, int ch_base) {
         if (port->ISFR & pmask) {
             mask |= pmask;
             uint32_t id = channel_ids[ch_base + i];
-            if (id == 0) continue;
+            if (id == 0) {
+                continue;
+            }
 
             FGPIO_Type *gpio;
             gpio_irq_event event = IRQ_NONE;
@@ -55,8 +57,9 @@ static void handle_interrupt_in(PORT_Type *port, int ch_base) {
                     event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
                     break;
             }
-            if (event != IRQ_NONE)
+            if (event != IRQ_NONE) {
                 irq_handler(id, event);
+            }
         }
     }
     port->ISFR = mask;
@@ -159,3 +162,13 @@ void gpio_irq_disable(gpio_irq_t *obj) {
         NVIC_DisableIRQ(PORTD_IRQn);
     }
 }
+
+// Change the NMI pin to an input. This allows NMI pin to 
+//  be used as a low power mode wakeup.  The application will
+//  need to change the pin back to NMI_b or wakeup only occurs once!
+extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction);
+void NMI_Handler(void)
+{
+    gpio_t gpio;
+    gpio_init(&gpio, PTA4, PIN_INPUT);
+}

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/gpio_irq_api.c

@@ -37,8 +37,9 @@ static void handle_interrupt_in(PORT_Type *port, int ch_base) {
         if (port->ISFR & pmask) {
             mask |= pmask;
             uint32_t id = channel_ids[ch_base + i];
-            if (id == 0)
+            if (id == 0) {
                 continue;
+            }
 
             FGPIO_Type *gpio;
             gpio_irq_event event = IRQ_NONE;
@@ -181,3 +182,13 @@ void gpio_irq_disable(gpio_irq_t *obj) {
         NVIC_DisableIRQ(PORTC_PORTD_IRQn);
     }
 }
+
+// Change the NMI pin to an input. This allows NMI pin to 
+//  be used as a low power mode wakeup.  The application will
+//  need to change the pin back to NMI_b or wakeup only occurs once!
+extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction);
+void NMI_Handler(void)
+{
+    gpio_t gpio;
+    gpio_init(&gpio, PTA4, PIN_INPUT);
+}