Diff: gpio/gpio.c

Revision:

0:0a841b89d614

diff -r 000000000000 -r 0a841b89d614 gpio/gpio.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gpio/gpio.c	Mon Oct 11 10:34:55 2010 +0000
@@ -0,0 +1,115 @@
+/****************************************************************************
+ *    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 "gpio.h"
+ 
+ 
+ /** gpio_init
+  */
+ void gpio_init(void) {
+ 
+    DEBUG_INIT_START;
+    
+    /* The following code could be condensed into a single set of
+       and/or statements. However, for code clarity they are laid
+       out on a "use case" way to see each pin being defined. Since
+       this is "init" code and only called once at start-up, the
+       extra overhead isn't worth the effort over cleaner to read
+       code. */
+       
+    /* The MAX7456 module uses p0.23 (p15) for it's chip select
+       output. Define it's setup here and use the macros in gpio.h
+       to assert, deassert or read the pin. */
+    //LPC_PINCON->PINSEL1 &= ~(3UL << 14);  /* Function GPIO. */
+    //LPC_GPIO0->FIODIR   |=  (1UL << 23);  /* P0.23 as output. */
+    
+    /* The MAX7456 module uses p0.16 (p14) for it's chip select
+       output. Define it's setup here and use the macros in gpio.h
+       to assert, deassert or read the pin. */
+    //LPC_PINCON->PINSEL1 &= ~(3UL << 14);  /* Function GPIO. */
+    //LPC_GPIO0->FIODIR   |=  (1UL << 16);  /* P0.23 as output. */
+
+    /* The MAX7456 module uses p0.6 (p8) for it's chip select
+       output. Define it's setup here and use the macros in gpio.h
+       to assert, deassert or read the pin. */
+    LPC_PINCON->PINSEL0 &= ~(3UL << 12);  /* Function GPIO. */
+    LPC_GPIO0->FIODIR   |=  (1UL <<  6);  /* P0.6 as output. */       
+
+             
+    /* The MAX7456 module uses p1.31 (p20) for it's reset output.
+       Define it's setup here and use the macros in gpio.h to assert, 
+       deassert or read the pin. */
+    LPC_PINCON->PINSEL3 &= ~(3UL << 30);  /* Function GPIO. */
+    LPC_GPIO1->FIODIR   |=  (1UL << 31);  /* P1.31 as output. */
+    
+    /* We use p0.25 (p17) for the SD Card detect. */
+    LPC_PINCON->PINSEL1 &= ~(3UL << 18);  /* Function GPIO. */
+    LPC_GPIO0->FIODIR   &= ~(1UL << 25);  /* P0.25 as Input. */
+    
+    /* We use p0.16 (p14) for the Flash device SSP0 CS signal. */
+    LPC_PINCON->PINSEL1 &= ~(3UL << 14);  /* Function GPIO. */
+    LPC_GPIO0->FIODIR   |=  (1UL << 16);  /* P0.23 as output. */
+
+    /* We use p0.24 (p16) for the 25AA02E48 device SSP0 CS signal. */
+    LPC_PINCON->PINSEL1 &= ~(3UL << 14);  /* Function GPIO. */
+    LPC_GPIO0->FIODIR   |=  (1UL << 24);  /* P0.24 as output. */ 
+    
+    /* We use p1.30 (p19) for the MicroSD card device SSP0 CS signal. */
+    LPC_PINCON->PINSEL3 &= ~(3UL << 28);  /* Function GPIO. */
+    LPC_GPIO1->FIODIR   |=  (1UL << 30);  /* P1.30 as output. */    
+    
+    /* We use p2.5 (p21) for debugging. */
+    LPC_PINCON->PINSEL4 &= ~(3UL << 10);  /* Function GPIO. */
+    LPC_GPIO2->FIODIR   |=  (1UL << 5);  /* P2.5 as output. */
+    
+    /* We use p2.4 (p22) for debugging. */
+    LPC_PINCON->PINSEL4 &= ~(3UL << 8);  /* Function GPIO. */
+    LPC_GPIO2->FIODIR   |=  (1UL << 4);  /* P2.4 as output. */
+    
+    
+#ifdef MBED_LEDS
+    /* The MBED has four useful little blue LEDs that can be used. 
+       Mbed examples use the DigitalOut led1(LED1) style. Mimic that
+       using our system here. Here however, I will use shorthand ;)     
+                                LED1           LED2           LED3           LED4     */
+    LPC_PINCON->PINSEL3 &= ( ~(3UL <<  4) & ~(3UL <<  8) & ~(3UL << 10) & ~(3UL << 14) );  
+    LPC_GPIO1->FIODIR   |= (  (1UL << 18) |  (1UL << 20) |  (1UL << 21) |  (1UL << 23) );
+#endif
+    
+    
+    SSP0_CS_DEASSERT;
+    FLASH_CS_DEASSERT;
+    SDCARD_CS_DEASSERT;
+    AA02E48_CS_DEASSERT;
+    MAX7456_CS_DEASSERT;
+    
+    DEBUG_INIT_END;
+}
+ 
+/** gpio_process
+ */
+void gpio_process(void) {
+   /* Does nothing, no house keeping required. */
+}
+