pinsel.h

00001 /* Copyright (C) 2010, 2011 by Ivo van Poorten <ivop@euronet.nl>
00002  * This file is licensed under the terms of the GNU Lesser
00003  * General Public License, version 3.
00004  */
00005 
00006 #ifndef FASTLIB_PINSEL_H
00007 #define FASTLIB_PINSEL_H
00008 
00009 #include "fastlib/common.h"
00010 
00011 #define FL_PINSEL0      ((volatile uint32_t *) 0x4002c000)
00012 #define FL_PINMODE0     ((volatile uint32_t *) 0x4002c040)
00013 #define FL_PINMODE_OD0  ((volatile uint32_t *) 0x4002c068)
00014 
00015 #define FL_PULLUP       0
00016 #define FL_REPEATER     1
00017 #define FL_TRISTATE     2
00018 #define FL_FLOATING     2
00019 #define FL_PULLDOWN     3
00020 
00021 #define FL_FUNC_DEFAULT 0
00022 #define FL_FUNC_ALT1    1
00023 #define FL_FUNC_ALT2    2
00024 #define FL_FUNC_ALT3    3
00025 
00026 /* fl_pinsel(port,pin,func,resistor,opendrain) :
00027  *
00028  * port         0-4
00029  * pin          0-31
00030  * func         0-3     (-1 is ignore)  default/alt1/alt2/alt3
00031  * resistor     0-3     (-1 is ignore)  pull-up, repeater, tri-state, pull-down
00032  * opendrain    0-1     (-1 is ignore)  off, on
00033  */
00034 
00035 static inline void fl_pinsel(unsigned port, unsigned pin, const int func, const int resistor, const int opendrain) {
00036     if (opendrain >= 0) {
00037         *(FL_PINMODE_OD0 + port) &= ~(       1U << pin);
00038         *(FL_PINMODE_OD0 + port) |=   opendrain << pin ;
00039     }
00040 
00041     if (func == -1 && resistor == -1) return;
00042 
00043     port <<= 1;
00044     if (pin >= 16) {
00045         pin -= 16;
00046         port++;
00047     }
00048     pin <<= 1;
00049 
00050     if (func >= 0) {    
00051         *(FL_PINSEL0 + port) &= ~(  3U << pin);
00052         *(FL_PINSEL0 + port) |=   func << pin ;
00053     }
00054     if (resistor >= 0) {
00055         *(FL_PINMODE0 + port) &= ~((uint32_t)      3U << pin);
00056         *(FL_PINMODE0 + port) |=   (uint32_t)resistor << pin ;
00057     }
00058 }
00059 
00060 /* Perhaps move this to i2c.h later??? */
00061 
00062 #define FL_I2CPADCFG ((volatile uint32_t *) 0x4002C07C)
00063 
00064 #define FL_SDA0_STANDARD_DRIVE  (0<<0)
00065 #define FL_SDA0_FAST_DRIVE      (1<<0)
00066 #define FL_SDA0_GLITCH_ENABLE   (0<<1)
00067 #define FL_SDA0_GLITCH_DISABLE  (1<<1)
00068 #define FL_SCL0_STANDARD_DRIVE  (0<<2)
00069 #define FL_SCL0_FAST_DRIVE      (1<<2)
00070 #define FL_SCL0_GLITCH_ENABLE   (0<<3)
00071 #define FL_SCL0_GLITCH_DISABLE  (1<<3)
00072 
00073 /* pins P0.27 and P0.28 */
00074 static inline void fl_i2c_pad_config(const unsigned config) {
00075     *FL_I2CPADCFG = config;
00076 }
00077 
00078 #endif