Diff: gpioirq/gpioirq.c

Revision:

0:0a841b89d614

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gpioirq/gpioirq.c	Mon Oct 11 10:34:55 2010 +0000
@@ -0,0 +1,88 @@
+/****************************************************************************
+ *    Copyright 2010 Andy Kirkham, Stellar Technologies Ltd
+ *    
+ *    This file is part of the Satellite Observers Workbench (SOWB).
+ *
+ *    SOWB is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    SOWB is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with SOWB.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    $Id: main.cpp 5 2010-07-12 20:51:11Z ajk $
+ *    
+ ***************************************************************************/
+ 
+#include "sowb.h"
+#include "debug.h"
+#include "gpioirq.h"
+
+/* Declare the external interrupt callback functions. */
+extern void MAX7456_vsync_rise(void);
+extern void MAX7456_vsync_fall(void);
+//extern void max7456_los_rise(void);
+//extern void max7456_los_fall(void);
+extern void gps_pps_rise(void);
+extern void gps_pps_fall(void);
+
+/** EINT3_IRQHandler
+ */
+extern "C" void GPIOIRQ_IRQHandler (void) {
+    
+    /* Test for IRQ on Port0. */
+    if (LPC_GPIOINT->IntStatus & 0x1) {
+        
+        /* GPS PPS is connected to MBED P29 (Port0.5) */
+        //if (LPC_GPIOINT->IO0IntStatR & (1 << 5))  gps_pps_rise();      
+
+        /* GPS PPS is connected to MBED P29 (Port0.5) */
+        if (LPC_GPIOINT->IO0IntStatF & (1 << 5))  gps_pps_fall();
+
+        /* MAX7456 Vertical Sync is connected to MBED P15 (Port0.23) */
+        if (LPC_GPIOINT->IO0IntStatF & (1 << 23)) MAX7456_vsync_fall();
+        
+        /* MAX7456 LOS is connected to P17 (Port0.25) */
+        //if (LPC_GPIOINT->IO0IntStatR & (1 << 25)) max7456_los_rise();  
+
+        LPC_GPIOINT->IO0IntClr = (LPC_GPIOINT->IO0IntStatR | LPC_GPIOINT->IO0IntStatF);
+    }
+
+    /* Test for IRQ on Port2. */
+    if (LPC_GPIOINT->IntStatus & 0x4) {
+                
+        LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF);
+    }
+}
+ 
+/** gpioirq_init
+ */
+void gpioirq_init(void) {
+
+    DEBUG_INIT_START;
+    
+    /* Enable the interrupts for connected signals. 
+       For bit definitions see the ISR function above. */
+    LPC_GPIOINT->IO0IntEnR |= ( (1UL << 5) | (1UL << 25) | (1UL << 23) );
+    LPC_GPIOINT->IO0IntEnF |= ( (1UL << 5) | (1UL << 25) | (1UL << 23) );
+    //LPC_GPIOINT->IO2IntEnR |= ( (1UL << 5) );
+    //LPC_GPIOINT->IO2IntEnF |= ( (1UL << 5) );
+    
+    NVIC_SetVector(EINT3_IRQn, (uint32_t)GPIOIRQ_IRQHandler);
+    NVIC_EnableIRQ(EINT3_IRQn);
+    
+    DEBUG_INIT_END;
+}
+
+void gpioirq_process(void) {
+    /* Does nothing, no periodic house keeping required. */
+}
+
+ 
+ 
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