Diff: main.cpp

Revision:

0:3e02d7f06e70

Child:

1:ff3274c0ed87

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Aug 02 23:27:41 2013 +0000
@@ -0,0 +1,42 @@
+#include "mbed.h"
+
+
+// Function prototype/forward declaration for ISR.
+void atint();
+ 
+/** EINT3_IRQHandler
+ */
+extern "C" void PORTA_IRQHandler __irq (void) {
+ 
+    // The "event" is connected to pin p10 which is LPC1768 P0_1
+    // so lets trap that and ignore all other GPIO interrupts.    
+    // Test for IRQ on Port0.
+    if (PORTA->ISFR & (1<<5)) 
+    {
+        // If P0_1/p10 rises, call atint()
+        atint();
+    }
+ 
+    // Clear this and all other possible GPIO generated interrupts as they don't concern us. 
+    PORTA->ISFR = 0x0000FFFF;   
+    //LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF);
+    //LPC_GPIOINT->IO0IntClr = (LPC_GPIOINT->IO0IntStatR | LPC_GPIOINT>IO0IntStatF);
+}
+ 
+void event_irq_init(void) {
+    // Use macro to set p10 as an input.
+    //p10_AS_INPUT; 
+    PORTA->PCR[5] = (PORTA->PCR & ~PORT_PCR_MUX_MASK) | PORT_PCR_MUX(0b001);
+    // Enable P0_1/p10 for rising edge interrupt generation.
+    PORTA->PCR[5] = (PORTA->PCR & ~PORT_PCR_IRQC_MASK) | PORT_PCR_IRQC(0b1011);
+   
+    //LPC_GPIOINT->IO0IntEnR |= (1UL << 1);
+    // Enable the interrupt.
+    NVIC_EnableIRQ(PORTA_IRQn);
+}
+
+int main(void)
+{
+    event_irq_init();
+    while();
+}
\ No newline at end of file