SimpleLib_03272011

Embed: (wiki syntax)

« Back to documentation index

Show/hide line numbers mbed_globals.h Source File

mbed_globals.h

00001 /*
00002 * Copyright or � or Copr. 2010, Thomas SOETE
00003 * 
00004 * Author e-mail: thomas@soete.org
00005 * Library website : http://mbed.org/users/Alkorin/libraries/SimpleLib/
00006 * 
00007 * This software is governed by the CeCILL license under French law and
00008 * abiding by the rules of distribution of free software.  You can  use, 
00009 * modify and/ or redistribute the software under the terms of the CeCILL
00010 * license as circulated by CEA, CNRS and INRIA at the following URL
00011 * "http://www.cecill.info". 
00012 * 
00013 * As a counterpart to the access to the source code and  rights to copy,
00014 * modify and redistribute granted by the license, users are provided only
00015 * with a limited warranty  and the software's author,  the holder of the
00016 * economic rights,  and the successive licensors  have only  limited
00017 * liability. 
00018 * 
00019 * In this respect, the user's attention is drawn to the risks associated
00020 * with loading,  using,  modifying and/or developing or reproducing the
00021 * software by the user in light of its specific status of free software,
00022 * that may mean  that it is complicated to manipulate,  and  that  also
00023 * therefore means  that it is reserved for developers  and  experienced
00024 * professionals having in-depth computer knowledge. Users are therefore
00025 * encouraged to load and test the software's suitability as regards their
00026 * requirements in conditions enabling the security of their systems and/or 
00027 * data to be ensured and,  more generally, to use and operate it in the 
00028 * same conditions as regards security. 
00029 * 
00030 * The fact that you are presently reading this means that you have had
00031 * knowledge of the CeCILL license and that you accept its terms.
00032 */
00033 
00034 #ifndef __SIMPLELIB_MBED_GLOBALS_H__
00035 #define __SIMPLELIB_MBED_GLOBALS_H__
00036 
00037 #include <LPC17xx.h>
00038 
00039 /* GLOBALS MACRO */
00040 #define GET_REGISTER8(reg)  *(volatile uint8_t *)(reg)
00041 #define GET_REGISTER16(reg) *(volatile uint16_t *)(reg)
00042 #define GET_REGISTER32(reg) *(volatile uint32_t *)(reg)
00043 
00044 #define SET_REGISTER8(reg, val)  *(uint8_t *)(reg)=(val)
00045 #define SET_REGISTER16(reg, val) *(uint16_t *)(reg)=(val)
00046 #define SET_REGISTER32(reg, val) *(uint32_t *)(reg)=(val)
00047 
00048 // See 34.3.2.5 p740
00049 #define BIT_BANDING_ADDRESS(reg, bit) (((reg) & 0xF0000000) | (0x02000000) | (((reg) & 0x000FFFFF) << 5) | ((bit) << 2))
00050 #define GET_BIT_ADDRESS(reg, bit) BIT_BANDING_ADDRESS(((uint32_t)&(reg)), (bit))
00051 #define GET_BIT_VALUE(reg, bit) GET_REGISTER32(GET_BIT_ADDRESS((reg), (bit)))
00052 #define SET_BIT_VALUE(reg, bit, value) SET_REGISTER32(GET_BIT_ADDRESS((reg), (bit)), (value))
00053 
00054 // Macro tools
00055 #define TOKENPASTE(x, y) x ## y
00056 #define TOKENPASTE2(x, y) TOKENPASTE(x, y)
00057 
00058 // Extern C
00059 #ifdef __cplusplus
00060     #define EXTERN_C extern "C"
00061 #else
00062     #define EXTERN_C
00063 #endif
00064 
00065 // Byte swap macros
00066 #define HTONS(x) (((((unsigned short)(x))>>8) & 0xff) | ((((unsigned short)(x)) & 0xff)<<8))
00067 #define NTOHS(x) (((((unsigned short)(x))>>8) & 0xff) | ((((unsigned short)(x)) & 0xff)<<8))
00068 #define HTONL(x) ((((x)>>24) & 0xffL) | (((x)>>8) & 0xff00L) | (((x)<<8) & 0xff0000L) | (((x)<<24) & 0xff000000L))
00069 #define NTOHL(x) ((((x)>>24) & 0xffL) | (((x)>>8) & 0xff00L) | (((x)<<8) & 0xff0000L) | (((x)<<24) & 0xff000000L))
00070 
00071 
00072 /** Constants **/
00073 // Peripheral Clock Selection register bit values (Table 42, p57)
00074 #define CCLK4   0U
00075 #define CCLK    1U
00076 #define CCLK2   2U
00077 #define CCLK8   3U
00078 
00079 #endif