gpioirq.c

00001 /****************************************************************************
00002  *    Copyright 2010 Andy Kirkham, Stellar Technologies Ltd
00003  *    
00004  *    This file is part of the Satellite Observers Workbench (SOWB).
00005  *
00006  *    SOWB is free software: you can redistribute it and/or modify
00007  *    it under the terms of the GNU General Public License as published by
00008  *    the Free Software Foundation, either version 3 of the License, or
00009  *    (at your option) any later version.
00010  *
00011  *    SOWB is distributed in the hope that it will be useful,
00012  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *    GNU General Public License for more details.
00015  *
00016  *    You should have received a copy of the GNU General Public License
00017  *    along with SOWB.  If not, see <http://www.gnu.org/licenses/>.
00018  *
00019  *    $Id: main.cpp 5 2010-07-12 20:51:11Z ajk $
00020  *    
00021  ***************************************************************************/
00022  
00023 #include "sowb.h"
00024 #include "debug.h"
00025 #include "gpioirq.h"
00026 
00027 /* Declare the external interrupt callback functions. */
00028 extern void MAX7456_vsync_rise(void);
00029 extern void MAX7456_vsync_fall(void);
00030 //extern void max7456_los_rise(void);
00031 //extern void max7456_los_fall(void);
00032 extern void gps_pps_rise(void);
00033 extern void gps_pps_fall(void);
00034 
00035 /** EINT3_IRQHandler
00036  */
00037 extern "C" void GPIOIRQ_IRQHandler (void) {
00038     
00039     /* Test for IRQ on Port0. */
00040     if (LPC_GPIOINT->IntStatus & 0x1) {
00041         
00042         /* GPS PPS is connected to MBED P29 (Port0.5) */
00043         //if (LPC_GPIOINT->IO0IntStatR & (1 << 5))  gps_pps_rise();      
00044 
00045         /* GPS PPS is connected to MBED P29 (Port0.5) */
00046         if (LPC_GPIOINT->IO0IntStatF & (1 << 5))  gps_pps_fall();
00047 
00048         /* MAX7456 Vertical Sync is connected to MBED P15 (Port0.23) */
00049         if (LPC_GPIOINT->IO0IntStatF & (1 << 23)) MAX7456_vsync_fall();
00050         
00051         /* MAX7456 LOS is connected to P17 (Port0.25) */
00052         //if (LPC_GPIOINT->IO0IntStatR & (1 << 25)) max7456_los_rise();  
00053 
00054         LPC_GPIOINT->IO0IntClr = (LPC_GPIOINT->IO0IntStatR | LPC_GPIOINT->IO0IntStatF);
00055     }
00056 
00057     /* Test for IRQ on Port2. */
00058     if (LPC_GPIOINT->IntStatus & 0x4) {
00059                 
00060         LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF);
00061     }
00062 }
00063  
00064 /** gpioirq_init
00065  */
00066 void gpioirq_init(void) {
00067 
00068     DEBUG_INIT_START;
00069     
00070     /* Enable the interrupts for connected signals. 
00071        For bit definitions see the ISR function above. */
00072     LPC_GPIOINT->IO0IntEnR |= ( (1UL << 5) | (1UL << 25) | (1UL << 23) );
00073     LPC_GPIOINT->IO0IntEnF |= ( (1UL << 5) | (1UL << 25) | (1UL << 23) );
00074     //LPC_GPIOINT->IO2IntEnR |= ( (1UL << 5) );
00075     //LPC_GPIOINT->IO2IntEnF |= ( (1UL << 5) );
00076     
00077     NVIC_SetVector(EINT3_IRQn, (uint32_t)GPIOIRQ_IRQHandler);
00078     NVIC_EnableIRQ(EINT3_IRQn);
00079     
00080     DEBUG_INIT_END;
00081 }
00082 
00083 void gpioirq_process(void) {
00084     /* Does nothing, no periodic house keeping required. */
00085 }
00086 
00087  
00088