Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

api/toolchain.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_TOOLCHAIN_H
<> 144:ef7eb2e8f9f7 17 #define MBED_TOOLCHAIN_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 // Warning for unsupported compilers
<> 144:ef7eb2e8f9f7 21 #if !defined(__GNUC__) /* GCC */ \
<> 144:ef7eb2e8f9f7 22 && !defined(__CC_ARM) /* ARMCC */ \
<> 144:ef7eb2e8f9f7 23 && !defined(__clang__) /* LLVM/Clang */ \
<> 144:ef7eb2e8f9f7 24 && !defined(__ICCARM__) /* IAR */
<> 144:ef7eb2e8f9f7 25 #warning "This compiler is not yet supported."
<> 144:ef7eb2e8f9f7 26 #endif
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29 // Attributes
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 /** MBED_PACKED
<> 144:ef7eb2e8f9f7 32 * Pack a structure, preventing any padding from being added between fields.
<> 144:ef7eb2e8f9f7 33 *
<> 144:ef7eb2e8f9f7 34 * @code
<> 144:ef7eb2e8f9f7 35 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 36 *
<> 144:ef7eb2e8f9f7 37 * MBED_PACKED(struct) foo {
<> 144:ef7eb2e8f9f7 38 * char x;
<> 144:ef7eb2e8f9f7 39 * int y;
<> 144:ef7eb2e8f9f7 40 * };
<> 144:ef7eb2e8f9f7 41 * @endcode
<> 144:ef7eb2e8f9f7 42 */
<> 144:ef7eb2e8f9f7 43 #ifndef MBED_PACKED
<> 144:ef7eb2e8f9f7 44 #if defined(__ICCARM__)
<> 144:ef7eb2e8f9f7 45 #define MBED_PACKED(struct) __packed struct
<> 144:ef7eb2e8f9f7 46 #else
<> 144:ef7eb2e8f9f7 47 #define MBED_PACKED(struct) struct __attribute__((packed))
<> 144:ef7eb2e8f9f7 48 #endif
<> 144:ef7eb2e8f9f7 49 #endif
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /** MBED_ALIGN(N)
<> 144:ef7eb2e8f9f7 52 * Declare a variable to be aligned on an N-byte boundary.
<> 144:ef7eb2e8f9f7 53 *
<> 144:ef7eb2e8f9f7 54 * @note
<> 144:ef7eb2e8f9f7 55 * IAR does not support alignment greater than word size on the stack
<> 144:ef7eb2e8f9f7 56 *
<> 144:ef7eb2e8f9f7 57 * @code
<> 144:ef7eb2e8f9f7 58 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 59 *
<> 144:ef7eb2e8f9f7 60 * MBED_ALIGN(16) char a;
<> 144:ef7eb2e8f9f7 61 * @endcode
<> 144:ef7eb2e8f9f7 62 */
<> 144:ef7eb2e8f9f7 63 #ifndef MBED_ALIGN
<> 144:ef7eb2e8f9f7 64 #if defined(__ICCARM__)
<> 144:ef7eb2e8f9f7 65 #define _MBED_ALIGN(N) _Pragma(#N)
<> 144:ef7eb2e8f9f7 66 #define MBED_ALIGN(N) _MBED_ALIGN(data_alignment=N)
<> 144:ef7eb2e8f9f7 67 #else
<> 144:ef7eb2e8f9f7 68 #define MBED_ALIGN(N) __attribute__((aligned(N)))
<> 144:ef7eb2e8f9f7 69 #endif
<> 144:ef7eb2e8f9f7 70 #endif
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 /** MBED_UNUSED
<> 144:ef7eb2e8f9f7 73 * Declare a function argument to be unused, suppressing compiler warnings
<> 144:ef7eb2e8f9f7 74 *
<> 144:ef7eb2e8f9f7 75 * @code
<> 144:ef7eb2e8f9f7 76 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 77 *
<> 144:ef7eb2e8f9f7 78 * void foo(MBED_UNUSED int arg) {
<> 144:ef7eb2e8f9f7 79 *
<> 144:ef7eb2e8f9f7 80 * }
<> 144:ef7eb2e8f9f7 81 * @endcode
<> 144:ef7eb2e8f9f7 82 */
<> 144:ef7eb2e8f9f7 83 #ifndef MBED_UNUSED
<> 144:ef7eb2e8f9f7 84 #if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 85 #define MBED_UNUSED __attribute__((__unused__))
<> 144:ef7eb2e8f9f7 86 #else
<> 144:ef7eb2e8f9f7 87 #define MBED_UNUSED
<> 144:ef7eb2e8f9f7 88 #endif
<> 144:ef7eb2e8f9f7 89 #endif
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 /** MBED_WEAK
<> 144:ef7eb2e8f9f7 92 * Mark a function as being weak.
<> 144:ef7eb2e8f9f7 93 *
<> 144:ef7eb2e8f9f7 94 * @note
<> 144:ef7eb2e8f9f7 95 * weak functions are not friendly to making code re-usable, as they can only
<> 144:ef7eb2e8f9f7 96 * be overridden once (and if they are multiply overridden the linker will emit
<> 144:ef7eb2e8f9f7 97 * no warning). You should not normally use weak symbols as part of the API to
<> 144:ef7eb2e8f9f7 98 * re-usable modules.
<> 144:ef7eb2e8f9f7 99 *
<> 144:ef7eb2e8f9f7 100 * @code
<> 144:ef7eb2e8f9f7 101 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 102 *
<> 144:ef7eb2e8f9f7 103 * MBED_WEAK void foo() {
<> 144:ef7eb2e8f9f7 104 * // a weak implementation of foo that can be overriden by a definition
<> 144:ef7eb2e8f9f7 105 * // without __weak
<> 144:ef7eb2e8f9f7 106 * }
<> 144:ef7eb2e8f9f7 107 * @endcode
<> 144:ef7eb2e8f9f7 108 */
<> 144:ef7eb2e8f9f7 109 #ifndef MBED_WEAK
<> 144:ef7eb2e8f9f7 110 #if defined(__ICCARM__)
<> 144:ef7eb2e8f9f7 111 #define MBED_WEAK __weak
<> 144:ef7eb2e8f9f7 112 #else
<> 144:ef7eb2e8f9f7 113 #define MBED_WEAK __attribute__((weak))
<> 144:ef7eb2e8f9f7 114 #endif
<> 144:ef7eb2e8f9f7 115 #endif
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 /** MBED_PURE
<> 144:ef7eb2e8f9f7 118 * Hint to the compiler that a function depends only on parameters
<> 144:ef7eb2e8f9f7 119 *
<> 144:ef7eb2e8f9f7 120 * @code
<> 144:ef7eb2e8f9f7 121 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 122 *
<> 144:ef7eb2e8f9f7 123 * MBED_PURE int foo(int arg){
<> 144:ef7eb2e8f9f7 124 * // no access to global variables
<> 144:ef7eb2e8f9f7 125 * }
<> 144:ef7eb2e8f9f7 126 * @endcode
<> 144:ef7eb2e8f9f7 127 */
<> 144:ef7eb2e8f9f7 128 #ifndef MBED_PURE
<> 144:ef7eb2e8f9f7 129 #if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 130 #define MBED_PURE __attribute__((const))
<> 144:ef7eb2e8f9f7 131 #else
<> 144:ef7eb2e8f9f7 132 #define MBED_PURE
<> 144:ef7eb2e8f9f7 133 #endif
<> 144:ef7eb2e8f9f7 134 #endif
<> 144:ef7eb2e8f9f7 135
<> 144:ef7eb2e8f9f7 136 /** MBED_FORCEINLINE
<> 144:ef7eb2e8f9f7 137 * Declare a function that must always be inlined. Failure to inline
<> 144:ef7eb2e8f9f7 138 * such a function will result in an error.
<> 144:ef7eb2e8f9f7 139 *
<> 144:ef7eb2e8f9f7 140 * @code
<> 144:ef7eb2e8f9f7 141 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 142 *
<> 144:ef7eb2e8f9f7 143 * MBED_FORCEINLINE void foo() {
<> 144:ef7eb2e8f9f7 144 *
<> 144:ef7eb2e8f9f7 145 * }
<> 144:ef7eb2e8f9f7 146 * @endcode
<> 144:ef7eb2e8f9f7 147 */
<> 144:ef7eb2e8f9f7 148 #ifndef MBED_FORCEINLINE
<> 144:ef7eb2e8f9f7 149 #if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 150 #define MBED_FORCEINLINE static inline __attribute__((always_inline))
<> 144:ef7eb2e8f9f7 151 #elif defined(__ICCARM__)
<> 144:ef7eb2e8f9f7 152 #define MBED_FORCEINLINE _Pragma("inline=forced") static
<> 144:ef7eb2e8f9f7 153 #else
<> 144:ef7eb2e8f9f7 154 #define MBED_FORCEINLINE static inline
<> 144:ef7eb2e8f9f7 155 #endif
<> 144:ef7eb2e8f9f7 156 #endif
<> 144:ef7eb2e8f9f7 157
<> 144:ef7eb2e8f9f7 158 /** MBED_NORETURN
<> 144:ef7eb2e8f9f7 159 * Declare a function that will never return.
<> 144:ef7eb2e8f9f7 160 *
<> 144:ef7eb2e8f9f7 161 * @code
<> 144:ef7eb2e8f9f7 162 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 163 *
<> 144:ef7eb2e8f9f7 164 * MBED_NORETURN void foo() {
<> 144:ef7eb2e8f9f7 165 * // must never return
<> 144:ef7eb2e8f9f7 166 * while (1) {}
<> 144:ef7eb2e8f9f7 167 * }
<> 144:ef7eb2e8f9f7 168 * @endcode
<> 144:ef7eb2e8f9f7 169 */
<> 144:ef7eb2e8f9f7 170 #ifndef MBED_NORETURN
<> 144:ef7eb2e8f9f7 171 #if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 172 #define MBED_NORETURN __attribute__((noreturn))
<> 144:ef7eb2e8f9f7 173 #elif defined(__ICCARM__)
<> 144:ef7eb2e8f9f7 174 #define MBED_NORETURN __noreturn
<> 144:ef7eb2e8f9f7 175 #else
<> 144:ef7eb2e8f9f7 176 #define MBED_NORETURN
<> 144:ef7eb2e8f9f7 177 #endif
<> 144:ef7eb2e8f9f7 178 #endif
<> 144:ef7eb2e8f9f7 179
<> 144:ef7eb2e8f9f7 180 /** MBED_UNREACHABLE
<> 144:ef7eb2e8f9f7 181 * An unreachable statement. If the statement is reached,
<> 144:ef7eb2e8f9f7 182 * behaviour is undefined. Useful in situations where the compiler
<> 144:ef7eb2e8f9f7 183 * cannot deduce the unreachability of code.
<> 144:ef7eb2e8f9f7 184 *
<> 144:ef7eb2e8f9f7 185 * @code
<> 144:ef7eb2e8f9f7 186 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 187 *
<> 144:ef7eb2e8f9f7 188 * void foo(int arg) {
<> 144:ef7eb2e8f9f7 189 * switch (arg) {
<> 144:ef7eb2e8f9f7 190 * case 1: return 1;
<> 144:ef7eb2e8f9f7 191 * case 2: return 2;
<> 144:ef7eb2e8f9f7 192 * ...
<> 144:ef7eb2e8f9f7 193 * }
<> 144:ef7eb2e8f9f7 194 * MBED_UNREACHABLE;
<> 144:ef7eb2e8f9f7 195 * }
<> 144:ef7eb2e8f9f7 196 * @endcode
<> 144:ef7eb2e8f9f7 197 */
<> 144:ef7eb2e8f9f7 198 #ifndef MBED_UNREACHABLE
<> 144:ef7eb2e8f9f7 199 #if (defined(__GNUC__) || defined(__clang__)) && !defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 200 #define MBED_UNREACHABLE __builtin_unreachable()
<> 144:ef7eb2e8f9f7 201 #else
<> 144:ef7eb2e8f9f7 202 #define MBED_UNREACHABLE while (1)
<> 144:ef7eb2e8f9f7 203 #endif
<> 144:ef7eb2e8f9f7 204 #endif
<> 144:ef7eb2e8f9f7 205
<> 144:ef7eb2e8f9f7 206 /** MBED_DEPRECATED("message string")
<> 144:ef7eb2e8f9f7 207 * Mark a function declaration as deprecated, if it used then a warning will be
<> 144:ef7eb2e8f9f7 208 * issued by the compiler possibly including the provided message. Note that not
<> 144:ef7eb2e8f9f7 209 * all compilers are able to display the message.
<> 144:ef7eb2e8f9f7 210 *
<> 144:ef7eb2e8f9f7 211 * @code
<> 144:ef7eb2e8f9f7 212 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 213 *
<> 144:ef7eb2e8f9f7 214 * MBED_DEPRECATED("don't foo any more, bar instead")
<> 144:ef7eb2e8f9f7 215 * void foo(int arg);
<> 144:ef7eb2e8f9f7 216 * @endcode
<> 144:ef7eb2e8f9f7 217 */
<> 144:ef7eb2e8f9f7 218 #ifndef MBED_DEPRECATED
<> 144:ef7eb2e8f9f7 219 #if defined(__GNUC__) || defined(__clang__)
<> 144:ef7eb2e8f9f7 220 #define MBED_DEPRECATED(M) __attribute__((deprecated(M)))
<> 144:ef7eb2e8f9f7 221 #elif defined(__CC_ARM)
<> 144:ef7eb2e8f9f7 222 #define MBED_DEPRECATED(M) __attribute__((deprecated))
<> 144:ef7eb2e8f9f7 223 #else
<> 144:ef7eb2e8f9f7 224 #define MBED_DEPRECATED(M)
<> 144:ef7eb2e8f9f7 225 #endif
<> 144:ef7eb2e8f9f7 226 #endif
<> 144:ef7eb2e8f9f7 227
<> 144:ef7eb2e8f9f7 228 /** MBED_DEPRECATED_SINCE("version", "message string")
<> 144:ef7eb2e8f9f7 229 * Mark a function declaration as deprecated, noting that the declaration was
<> 144:ef7eb2e8f9f7 230 * deprecated on the specified version. If the function is used then a warning
<> 144:ef7eb2e8f9f7 231 * will be issued by the compiler possibly including the provided message.
<> 144:ef7eb2e8f9f7 232 * Note that not all compilers are able to display this message.
<> 144:ef7eb2e8f9f7 233 *
<> 144:ef7eb2e8f9f7 234 * @code
<> 144:ef7eb2e8f9f7 235 * #include "toolchain.h"
<> 144:ef7eb2e8f9f7 236 *
<> 144:ef7eb2e8f9f7 237 * MBED_DEPRECATED_SINCE("mbed-os-5.1", "don't foo any more, bar instead")
<> 144:ef7eb2e8f9f7 238 * void foo(int arg);
<> 144:ef7eb2e8f9f7 239 * @endcode
<> 144:ef7eb2e8f9f7 240 */
<> 144:ef7eb2e8f9f7 241 #define MBED_DEPRECATED_SINCE(D, M) MBED_DEPRECATED(M " [since " D "]")
<> 144:ef7eb2e8f9f7 242
<> 144:ef7eb2e8f9f7 243
<> 144:ef7eb2e8f9f7 244 // FILEHANDLE declaration
<> 144:ef7eb2e8f9f7 245 #if defined(TOOLCHAIN_ARM)
<> 144:ef7eb2e8f9f7 246 #include <rt_sys.h>
<> 144:ef7eb2e8f9f7 247 #endif
<> 144:ef7eb2e8f9f7 248
<> 144:ef7eb2e8f9f7 249 #ifndef FILEHANDLE
<> 144:ef7eb2e8f9f7 250 typedef int FILEHANDLE;
<> 144:ef7eb2e8f9f7 251 #endif
<> 144:ef7eb2e8f9f7 252
<> 144:ef7eb2e8f9f7 253 // Backwards compatibility
<> 144:ef7eb2e8f9f7 254 #ifndef WEAK
<> 144:ef7eb2e8f9f7 255 #define WEAK MBED_WEAK
<> 144:ef7eb2e8f9f7 256 #endif
<> 144:ef7eb2e8f9f7 257
<> 144:ef7eb2e8f9f7 258 #ifndef PACKED
<> 144:ef7eb2e8f9f7 259 #define PACKED MBED_PACKED()
<> 144:ef7eb2e8f9f7 260 #endif
<> 144:ef7eb2e8f9f7 261
<> 144:ef7eb2e8f9f7 262 #ifndef EXTERN
<> 144:ef7eb2e8f9f7 263 #define EXTERN extern
<> 144:ef7eb2e8f9f7 264 #endif
<> 144:ef7eb2e8f9f7 265
<> 144:ef7eb2e8f9f7 266 #endif