4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
35 * \author Francesco Sacchi <batt@develer.com>
37 * AT91 periodic interval timer.
38 * This file is based on NUT/OS implementation. See license below.
42 * Copyright (C) 2007 by egnite Software GmbH. All rights reserved.
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
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55 * from this software without specific prior written permission.
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70 * For additional information see http://www.ethernut.de/
76 #include <cfg/compiler.h>
78 *Periodic Inverval Timer Mode Register
81 #define PIT_MR_OFF 0x00000000 ///< Mode register offset.
82 #define PIT_MR (*((reg32_t *)(PIT_BASE + PIT_MR_OFF))) ///< Mode register address.
84 #define PIV_MASK 0x000FFFFF ///< Periodic interval value mask.
85 #define PIV_SHIFT 0 ///< Periodic interval value shift.
86 #define PITEN 24 ///< Periodic interval timer enable.
87 #define PITIEN 25 ///< Periodic interval timer interrupt enable.
91 * Periodic Inverval Timer Status Register
94 #define PIT_SR_OFF 0x00000004 ///< Status register offset.
95 #define PIT_SR (*((reg32_t *)(PIT_BASE + PIT_SR_OFF))) ///< Status register address.
97 #define PITS 0 ///< Timer has reached PIV.
101 * Periodic Inverval Timer Value and Image Registers
104 #define PIVR_OFF 0x00000008 ///< Value register offset.
105 #define PIVR (*((reg32_t *)(PIT_BASE + PIVR_OFF))) ///< Value register address.
107 #define PIIR_OFF 0x0000000C ///< Image register offset.
108 #define PIIR (*((reg32_t *)(PIT_BASE + PIIR_OFF))) ///< Image register address.
109 #define CPIV_MASK 0x000FFFFF ///< Current periodic interval value mask.
110 #define CPIV_SHIFT 0 ///< Current periodic interval value SHIFT.
111 #define PICNT_MASK 0xFFF00000 ///< Periodic interval counter mask.
112 #define PICNT_SHIFT 20 ///< Periodic interval counter LSB.
115 #endif /* AT91_PIT_H */