Diff: main.cpp

Revision:

1:feae56685ab1

Parent:

0:d80295a0bcc2

Child:

2:d7784cc39c81

--- a/main.cpp	Wed Mar 26 16:13:42 2014 +0000
+++ b/main.cpp	Thu Mar 27 15:36:48 2014 +0000
@@ -2,37 +2,67 @@
 #include "interrupt.h"
 
 Serial pc(USBTX, USBRX);
+DigitalOut led1(LED1);
+
 void *accelerometer = Accelerometer_C_new();
 bool capture = false;
+bool first = true;
+bool ready = false;
 
-extern "C" void interruptCapture()
+extern "C" void interruptCapture(void)
 {
-    capture = !capture;
-    
-    if (capture)
+    led1 = 1;
+    pc.printf("ALLO");
+    if ((LPC_TIM2->IR & 0x10) == 0x10) // Interrupt capture
+    {
+        ready = !ready;
+        if (first)
+        {
+            capture = !capture;
+            first = true;
+            
+            LPC_TIM2->TC = 0;       // clear timer counter
+            LPC_TIM2->PC = 0;       // clear prescale counter
+            LPC_TIM2->PR = 0;       // clear prescale register
+            LPC_TIM2->MCR |= 0x03;  // interrupt and reset control
+        }
+        
+    } 
+    else if ((LPC_TIM2->IR & 0x01) == 0x01) // Interrupt match
     {
-        LPC_TIM3->TC = 0;   // clear timer counter
-        LPC_TIM3->PC = 0;   // clear prescale counter
-        LPC_TIM3->PR = 0;   // clear prescale register
-        LPC_TIM3->IR |= 0xFF;
-        
-        NVIC_EnableIRQ(TIMER3_IRQn); // Enable timer3 interrupt
-        
+        if (ready)
+        {
+            if (capture)
+            {
+                LPC_TIM3->TC = 0;       // clear timer counter
+                LPC_TIM3->PC = 0;       // clear prescale counter
+                LPC_TIM3->PR = 0;       // clear prescale register
+                LPC_TIM3->IR |= 0xFF;
+                
+                NVIC_EnableIRQ(TIMER3_IRQn); // Enable timer3 interrupt
+            }
+            else
+            {
+                NVIC_DisableIRQ(TIMER3_IRQn); // Enable timer3 interrupt
+            }
+            
+            ready = false;
+            first = false;
+            LPC_TIM2->MCR = 0;
+        } 
     }
-    else
-    {
-        NVIC_DisableIRQ(TIMER3_IRQn); // Disable timer3 interrupt
-    }
+    
+    LPC_TIM2->IR |= 0xFF;
 }
 
-extern "C" void interruptMatch()
+extern "C" void interruptMatch(void)
 {
     unsigned short* values;
     
     values = Accelerometer_C_getAccelValue(accelerometer);
     
     for(int i = 0; i < 3; i++)
-            pc.printf("%d/n/r", values[i]);
+        pc.printf("%d\n", values[i]);
     
 
     LPC_TIM3->IR |= 0x01; // Reset timer  
@@ -41,26 +71,24 @@
 void initialize()
 {
     // Set system control
-    LPC_SC->PCONP |= (3 << 22); // Enable Timer2
+    LPC_SC->PCONP |= (3 << 22); // Enable Timer2 and Timer3
     LPC_SC->PCLKSEL1 |= (1 << 12); // PClk Timer2 = CCLK
+    LPC_SC->PCLKSEL1 |= (1 << 14); // PClk Timer3 = CCLK
     
     // Set pin connection
-    LPC_PINCON->PINSEL0 |= (3 << 8) | (3<<20); // Pin 30 Capture and Pin X Match
+    LPC_PINCON->PINSEL0 |= (3 << 8) | (3 << 12) | (3 << 20); // Capture 2.0 and Match 2.0 and Match 3.0
     
     // Set timer 2 for capture
     LPC_TIM2->TC = 0;               // clear timer counter
     LPC_TIM2->PC = 0;               // clear prescale counter
     LPC_TIM2->PR = 0;               // clear prescale register
-    LPC_TIM2->TCR = (1 << 1);       // reset timer
-    LPC_TIM2->IR |= 0xFF;           // Clear MR0 interrupt flag
+    LPC_TIM2->MR0 = SystemCoreClock / 10000;
+    LPC_TIM2->IR |= 0xFF;           // Clear interrupt flag
     LPC_TIM2->CCR |= (7 << 0);      // enable cap2.0 rising-edge capture and falling-edge; interrupt on cap2.0
-    LPC_TIM2->TCR = 1;              // start Timer2
-    
-    NVIC_EnableIRQ(TIMER2_IRQn);    //enable timer2 interrupt
     
     // Set timer 3 for match
     LPC_TIM3->MR0 = SystemCoreClock / 20;
-    LPC_TIM3->MCR |= 0x03;              //interrupt and reset control
+    LPC_TIM3->MCR |= 0x03;              // interrupt and reset control
     LPC_TIM3->TC = 0;                   // clear timer counter
     LPC_TIM3->PC = 0;                   // clear prescale counter
     LPC_TIM3->PR = 0;                   // clear prescale register
@@ -69,19 +97,17 @@
     
     // Set call function
     NVIC_SetVector(TIMER2_IRQn, uint32_t(interruptCapture));
-    NVIC_SetVector(TIMER3_IRQn, uint32_t(interruptMatch));  
+    NVIC_SetVector(TIMER3_IRQn, uint32_t(interruptMatch));
+        
+    NVIC_EnableIRQ(TIMER2_IRQn);    // enable timer2 interrupt
+    LPC_TIM2->TCR = 0x01;           // start Timer2
 }
 
 int main()
 {
-    Accelerometer accel;
-    while(1)
-    {  
-        unsigned short* values;
-        wait(0.1);
-        values = accel.getAccelValue();
-        
-        for(int i = 0; i < 3; i++)
-            pc.printf("%d/n/r", values[i]);
+    initialize();
+    
+    while(true)
+    {
     }
 }