AVR32114 Using the AVR32 LCD Controller: pio.c Source File

00001 /*This file has been prepared for Doxygen automatic documentation generation.*/
00023 /* ************************************************************************
00024 
00025 Copyright (c) 2006, Atmel Corporation All rights reserved. 
00026 
00027 Redistribution and use in source and binary forms, with or without
00028 modification, are permitted provided that the following conditions are met:
00029 
00030 1. Redistributions of source code must retain the above copyright notice,
00031 this list of conditions and the 
00032 following disclaimer. 
00033 
00034 2. Redistributions in binary form must reproduce the above copyright notice,
00035 this list of conditions and the following disclaimer in the documentation
00036 and/or other materials provided with the distribution.
00037 
00038 3. The name of ATMEL may not be used to endorse or promote products 
00039 derived from this software without specific prior written permission.  
00040 
00041 THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS 
00042 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
00043 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
00044 PARTICULAR PURPOSE ARE EXPRESSLY AND SPECIFICALLY 
00045 DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
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00054 POSSIBILITY OF SUCH DAMAGE. 
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00056 ************************************************************************ */
00057 
00058 #include "pio.h"
00059 
00060 volatile avr32_pio_t *pioGetHandle(int port)
00061 {
00062         switch (port) {
00063                 case 0:
00064                         return &AVR32_PIOA;
00065                 case 1:
00066                         return &AVR32_PIOB;
00067                 case 2:
00068                         return &AVR32_PIOC;
00069                 case 3:
00070                         return &AVR32_PIOD;
00071                 case 4:
00072                         return &AVR32_PIOE;
00073                 default :
00074                         break;
00075         }
00076         return (avr32_pio_t *) -1;
00077 }
00078 
00079 int pio_setup_pin(int pin, int function)
00080 {
00081         volatile avr32_pio_t *pio = pioGetHandle(pin/32);
00082 
00083 
00084         /* Disable pio control */
00085         pio->pdr |= (1<<(pin%32));
00086         pio->pudr |= (1<<(pin%32));
00087 
00088         /* Enable the correct function */
00089         switch(function){
00090                 case 0:
00091                         pio->asr |= (1<<(pin%32));
00092                         break;
00093                 case 1:
00094                         pio->bsr |= (1<<(pin%32));
00095                         break;
00096                 default:
00097                         return PIO_INVALID_ARGUMENT;
00098         }
00099         return PIO_SUCCESS;
00100 }
00101 
00102 void pio_enable_module(avr32_piomap_t piomap, int size)
00103 {
00104         int i;
00105 
00106         for(i=0; i<size; i++){
00107                 pio_setup_pin(**piomap, *(*piomap+1) );
00108                 piomap++;
00109         }
00110 }