不韋 呂 / F746_SD_Player_Demo

Demo program for library named SD_PlayerSkeleton of SD card player skeleton. SD カードプレーヤのための骨組みとして使うためのライブラリ SD_PlayerSkeleton の使用例．このプログラムについては，CQ出版社インターフェース誌 2018年7月号で解説している．

Dependencies:   F746_GUI F746_SAI_IO SD_PlayerSkeleton

mbed_src_STM32F7/api/CThunk.h@19:3c3833ec00d2, 2017-04-09 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Apr 09 12:44:17 2017 +0000
Revision:
19:3c3833ec00d2
Parent:
2:cf42e62a97dc 
20

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:cf42e62a97dc 1 /* General C++ Object Thunking class
MikamiUitOpen 2:cf42e62a97dc 2 *
MikamiUitOpen 2:cf42e62a97dc 3 * - allows direct callbacks to non-static C++ class functions
MikamiUitOpen 2:cf42e62a97dc 4 * - keeps track for the corresponding class instance
MikamiUitOpen 2:cf42e62a97dc 5 * - supports an optional context parameter for the called function
MikamiUitOpen 2:cf42e62a97dc 6 * - ideally suited for class object receiving interrupts (NVIC_SetVector)
MikamiUitOpen 2:cf42e62a97dc 7 *
MikamiUitOpen 2:cf42e62a97dc 8 * Copyright (c) 2014-2015 ARM Limited
MikamiUitOpen 2:cf42e62a97dc 9 *
MikamiUitOpen 2:cf42e62a97dc 10 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:cf42e62a97dc 11 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:cf42e62a97dc 12 * You may obtain a copy of the License at
MikamiUitOpen 2:cf42e62a97dc 13 *
MikamiUitOpen 2:cf42e62a97dc 14 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:cf42e62a97dc 15 *
MikamiUitOpen 2:cf42e62a97dc 16 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:cf42e62a97dc 17 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:cf42e62a97dc 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:cf42e62a97dc 19 * See the License for the specific language governing permissions and
MikamiUitOpen 2:cf42e62a97dc 20 * limitations under the License.
MikamiUitOpen 2:cf42e62a97dc 21 */
MikamiUitOpen 2:cf42e62a97dc 22 #ifndef __CTHUNK_H__
MikamiUitOpen 2:cf42e62a97dc 23 #define __CTHUNK_H__
MikamiUitOpen 2:cf42e62a97dc 24
MikamiUitOpen 2:cf42e62a97dc 25 #define CTHUNK_ADDRESS 1
MikamiUitOpen 2:cf42e62a97dc 26
MikamiUitOpen 2:cf42e62a97dc 27 #if (defined(__CORTEX_M3) || defined(__CORTEX_M4) || defined(__thumb2__)) && ! defined(__CORTEX_A9)
MikamiUitOpen 2:cf42e62a97dc 28 #define CTHUNK_VARIABLES volatile uint32_t code[1]
MikamiUitOpen 2:cf42e62a97dc 29 /**
MikamiUitOpen 2:cf42e62a97dc 30 * CTHUNK disassembly for Cortex-M3/M4 (thumb2):
MikamiUitOpen 2:cf42e62a97dc 31 * * ldm.w pc,{r0,r1,r2,pc}
MikamiUitOpen 2:cf42e62a97dc 32 *
MikamiUitOpen 2:cf42e62a97dc 33 * This instruction loads the arguments for the static thunking function to r0-r2, and
MikamiUitOpen 2:cf42e62a97dc 34 * branches to that function by loading its address into PC.
MikamiUitOpen 2:cf42e62a97dc 35 *
MikamiUitOpen 2:cf42e62a97dc 36 * This is safe for both regular calling and interrupt calling, since it only touches scratch registers
MikamiUitOpen 2:cf42e62a97dc 37 * which should be saved by the caller, and are automatically saved as part of the IRQ context switch.
MikamiUitOpen 2:cf42e62a97dc 38 */
MikamiUitOpen 2:cf42e62a97dc 39 #define CTHUNK_ASSIGMENT m_thunk.code[0] = 0x8007E89F
MikamiUitOpen 2:cf42e62a97dc 40
MikamiUitOpen 2:cf42e62a97dc 41 #elif defined(__CORTEX_M0PLUS) || defined(__CORTEX_M0) || defined(__CORTEX_A9)
MikamiUitOpen 2:cf42e62a97dc 42 /*
MikamiUitOpen 2:cf42e62a97dc 43 * CTHUNK disassembly for Cortex M0 (thumb):
MikamiUitOpen 2:cf42e62a97dc 44 * * push {r0,r1,r2,r3,r4,lr} save touched registers and return address
MikamiUitOpen 2:cf42e62a97dc 45 * * movs r4,#4 set up address to load arguments from (immediately following this code block) (1)
MikamiUitOpen 2:cf42e62a97dc 46 * * add r4,pc set up address to load arguments from (immediately following this code block) (2)
MikamiUitOpen 2:cf42e62a97dc 47 * * ldm r4!,{r0,r1,r2,r3} load arguments for static thunk function
MikamiUitOpen 2:cf42e62a97dc 48 * * blx r3 call static thunk function
MikamiUitOpen 2:cf42e62a97dc 49 * * pop {r0,r1,r2,r3,r4,pc} restore scratch registers and return from function
MikamiUitOpen 2:cf42e62a97dc 50 */
MikamiUitOpen 2:cf42e62a97dc 51 #define CTHUNK_VARIABLES volatile uint32_t code[3]
MikamiUitOpen 2:cf42e62a97dc 52 #define CTHUNK_ASSIGMENT do { \
MikamiUitOpen 2:cf42e62a97dc 53 m_thunk.code[0] = 0x2404B51F; \
MikamiUitOpen 2:cf42e62a97dc 54 m_thunk.code[1] = 0xCC0F447C; \
MikamiUitOpen 2:cf42e62a97dc 55 m_thunk.code[2] = 0xBD1F4798; \
MikamiUitOpen 2:cf42e62a97dc 56 } while (0)
MikamiUitOpen 2:cf42e62a97dc 57
MikamiUitOpen 2:cf42e62a97dc 58 #else
MikamiUitOpen 2:cf42e62a97dc 59 #error "Target is not currently suported."
MikamiUitOpen 2:cf42e62a97dc 60 #endif
MikamiUitOpen 2:cf42e62a97dc 61
MikamiUitOpen 2:cf42e62a97dc 62 /* IRQ/Exception compatible thunk entry function */
MikamiUitOpen 2:cf42e62a97dc 63 typedef void (*CThunkEntry)(void);
MikamiUitOpen 2:cf42e62a97dc 64
MikamiUitOpen 2:cf42e62a97dc 65 template<class T>
MikamiUitOpen 2:cf42e62a97dc 66 class CThunk
MikamiUitOpen 2:cf42e62a97dc 67 {
MikamiUitOpen 2:cf42e62a97dc 68 public:
MikamiUitOpen 2:cf42e62a97dc 69 typedef void (T::*CCallbackSimple)(void);
MikamiUitOpen 2:cf42e62a97dc 70 typedef void (T::*CCallback)(void* context);
MikamiUitOpen 2:cf42e62a97dc 71
MikamiUitOpen 2:cf42e62a97dc 72 inline CThunk(T *instance)
MikamiUitOpen 2:cf42e62a97dc 73 {
MikamiUitOpen 2:cf42e62a97dc 74 init(instance, NULL, NULL);
MikamiUitOpen 2:cf42e62a97dc 75 }
MikamiUitOpen 2:cf42e62a97dc 76
MikamiUitOpen 2:cf42e62a97dc 77 inline CThunk(T *instance, CCallback callback)
MikamiUitOpen 2:cf42e62a97dc 78 {
MikamiUitOpen 2:cf42e62a97dc 79 init(instance, callback, NULL);
MikamiUitOpen 2:cf42e62a97dc 80 }
MikamiUitOpen 2:cf42e62a97dc 81
MikamiUitOpen 2:cf42e62a97dc 82 ~CThunk() {
MikamiUitOpen 2:cf42e62a97dc 83
MikamiUitOpen 2:cf42e62a97dc 84 }
MikamiUitOpen 2:cf42e62a97dc 85
MikamiUitOpen 2:cf42e62a97dc 86 inline CThunk(T *instance, CCallbackSimple callback)
MikamiUitOpen 2:cf42e62a97dc 87 {
MikamiUitOpen 2:cf42e62a97dc 88 init(instance, (CCallback)callback, NULL);
MikamiUitOpen 2:cf42e62a97dc 89 }
MikamiUitOpen 2:cf42e62a97dc 90
MikamiUitOpen 2:cf42e62a97dc 91 inline CThunk(T &instance, CCallback callback)
MikamiUitOpen 2:cf42e62a97dc 92 {
MikamiUitOpen 2:cf42e62a97dc 93 init(instance, callback, NULL);
MikamiUitOpen 2:cf42e62a97dc 94 }
MikamiUitOpen 2:cf42e62a97dc 95
MikamiUitOpen 2:cf42e62a97dc 96 inline CThunk(T &instance, CCallbackSimple callback)
MikamiUitOpen 2:cf42e62a97dc 97 {
MikamiUitOpen 2:cf42e62a97dc 98 init(instance, (CCallback)callback, NULL);
MikamiUitOpen 2:cf42e62a97dc 99 }
MikamiUitOpen 2:cf42e62a97dc 100
MikamiUitOpen 2:cf42e62a97dc 101 inline CThunk(T &instance, CCallback callback, void* context)
MikamiUitOpen 2:cf42e62a97dc 102 {
MikamiUitOpen 2:cf42e62a97dc 103 init(instance, callback, context);
MikamiUitOpen 2:cf42e62a97dc 104 }
MikamiUitOpen 2:cf42e62a97dc 105
MikamiUitOpen 2:cf42e62a97dc 106 inline void callback(CCallback callback)
MikamiUitOpen 2:cf42e62a97dc 107 {
MikamiUitOpen 2:cf42e62a97dc 108 m_callback = callback;
MikamiUitOpen 2:cf42e62a97dc 109 }
MikamiUitOpen 2:cf42e62a97dc 110
MikamiUitOpen 2:cf42e62a97dc 111 inline void callback(CCallbackSimple callback)
MikamiUitOpen 2:cf42e62a97dc 112 {
MikamiUitOpen 2:cf42e62a97dc 113 m_callback = (CCallback)callback;
MikamiUitOpen 2:cf42e62a97dc 114 }
MikamiUitOpen 2:cf42e62a97dc 115
MikamiUitOpen 2:cf42e62a97dc 116 inline void context(void* context)
MikamiUitOpen 2:cf42e62a97dc 117 {
MikamiUitOpen 2:cf42e62a97dc 118 m_thunk.context = (uint32_t)context;
MikamiUitOpen 2:cf42e62a97dc 119 }
MikamiUitOpen 2:cf42e62a97dc 120
MikamiUitOpen 2:cf42e62a97dc 121 inline void context(uint32_t context)
MikamiUitOpen 2:cf42e62a97dc 122 {
MikamiUitOpen 2:cf42e62a97dc 123 m_thunk.context = context;
MikamiUitOpen 2:cf42e62a97dc 124 }
MikamiUitOpen 2:cf42e62a97dc 125
MikamiUitOpen 2:cf42e62a97dc 126 inline uint32_t entry(void)
MikamiUitOpen 2:cf42e62a97dc 127 {
MikamiUitOpen 2:cf42e62a97dc 128 return (((uint32_t)&m_thunk)|CTHUNK_ADDRESS);
MikamiUitOpen 2:cf42e62a97dc 129 }
MikamiUitOpen 2:cf42e62a97dc 130
MikamiUitOpen 2:cf42e62a97dc 131 /* get thunk entry point for connecting rhunk to an IRQ table */
MikamiUitOpen 2:cf42e62a97dc 132 inline operator CThunkEntry(void)
MikamiUitOpen 2:cf42e62a97dc 133 {
MikamiUitOpen 2:cf42e62a97dc 134 return (CThunkEntry)entry();
MikamiUitOpen 2:cf42e62a97dc 135 }
MikamiUitOpen 2:cf42e62a97dc 136
MikamiUitOpen 2:cf42e62a97dc 137 /* get thunk entry point for connecting rhunk to an IRQ table */
MikamiUitOpen 2:cf42e62a97dc 138 inline operator uint32_t(void)
MikamiUitOpen 2:cf42e62a97dc 139 {
MikamiUitOpen 2:cf42e62a97dc 140 return entry();
MikamiUitOpen 2:cf42e62a97dc 141 }
MikamiUitOpen 2:cf42e62a97dc 142
MikamiUitOpen 2:cf42e62a97dc 143 /* simple test function */
MikamiUitOpen 2:cf42e62a97dc 144 inline void call(void)
MikamiUitOpen 2:cf42e62a97dc 145 {
MikamiUitOpen 2:cf42e62a97dc 146 (((CThunkEntry)(entry()))());
MikamiUitOpen 2:cf42e62a97dc 147 }
MikamiUitOpen 2:cf42e62a97dc 148
MikamiUitOpen 2:cf42e62a97dc 149 private:
MikamiUitOpen 2:cf42e62a97dc 150 T* m_instance;
MikamiUitOpen 2:cf42e62a97dc 151 volatile CCallback m_callback;
MikamiUitOpen 2:cf42e62a97dc 152
MikamiUitOpen 2:cf42e62a97dc 153 // TODO: this needs proper fix, to refactor toolchain header file and all its use
MikamiUitOpen 2:cf42e62a97dc 154 // PACKED there is not defined properly for IAR
MikamiUitOpen 2:cf42e62a97dc 155 #if defined (__ICCARM__)
MikamiUitOpen 2:cf42e62a97dc 156 typedef __packed struct
MikamiUitOpen 2:cf42e62a97dc 157 {
MikamiUitOpen 2:cf42e62a97dc 158 CTHUNK_VARIABLES;
MikamiUitOpen 2:cf42e62a97dc 159 volatile uint32_t instance;
MikamiUitOpen 2:cf42e62a97dc 160 volatile uint32_t context;
MikamiUitOpen 2:cf42e62a97dc 161 volatile uint32_t callback;
MikamiUitOpen 2:cf42e62a97dc 162 volatile uint32_t trampoline;
MikamiUitOpen 2:cf42e62a97dc 163 } CThunkTrampoline;
MikamiUitOpen 2:cf42e62a97dc 164 #else
MikamiUitOpen 2:cf42e62a97dc 165 typedef struct
MikamiUitOpen 2:cf42e62a97dc 166 {
MikamiUitOpen 2:cf42e62a97dc 167 CTHUNK_VARIABLES;
MikamiUitOpen 2:cf42e62a97dc 168 volatile uint32_t instance;
MikamiUitOpen 2:cf42e62a97dc 169 volatile uint32_t context;
MikamiUitOpen 2:cf42e62a97dc 170 volatile uint32_t callback;
MikamiUitOpen 2:cf42e62a97dc 171 volatile uint32_t trampoline;
MikamiUitOpen 2:cf42e62a97dc 172 } __attribute__((__packed__)) CThunkTrampoline;
MikamiUitOpen 2:cf42e62a97dc 173 #endif
MikamiUitOpen 2:cf42e62a97dc 174
MikamiUitOpen 2:cf42e62a97dc 175 static void trampoline(T* instance, void* context, CCallback* callback)
MikamiUitOpen 2:cf42e62a97dc 176 {
MikamiUitOpen 2:cf42e62a97dc 177 if(instance && *callback) {
MikamiUitOpen 2:cf42e62a97dc 178 (static_cast<T*>(instance)->**callback)(context);
MikamiUitOpen 2:cf42e62a97dc 179 }
MikamiUitOpen 2:cf42e62a97dc 180 }
MikamiUitOpen 2:cf42e62a97dc 181
MikamiUitOpen 2:cf42e62a97dc 182 volatile CThunkTrampoline m_thunk;
MikamiUitOpen 2:cf42e62a97dc 183
MikamiUitOpen 2:cf42e62a97dc 184 inline void init(T *instance, CCallback callback, void* context)
MikamiUitOpen 2:cf42e62a97dc 185 {
MikamiUitOpen 2:cf42e62a97dc 186 /* remember callback - need to add this level of redirection
MikamiUitOpen 2:cf42e62a97dc 187 as pointer size for member functions differs between platforms */
MikamiUitOpen 2:cf42e62a97dc 188 m_callback = callback;
MikamiUitOpen 2:cf42e62a97dc 189
MikamiUitOpen 2:cf42e62a97dc 190 /* populate thunking trampoline */
MikamiUitOpen 2:cf42e62a97dc 191 CTHUNK_ASSIGMENT;
MikamiUitOpen 2:cf42e62a97dc 192 m_thunk.context = (uint32_t)context;
MikamiUitOpen 2:cf42e62a97dc 193 m_thunk.instance = (uint32_t)instance;
MikamiUitOpen 2:cf42e62a97dc 194 m_thunk.callback = (uint32_t)&m_callback;
MikamiUitOpen 2:cf42e62a97dc 195 m_thunk.trampoline = (uint32_t)&trampoline;
MikamiUitOpen 2:cf42e62a97dc 196
MikamiUitOpen 2:cf42e62a97dc 197 #if defined(__CORTEX_A9)
MikamiUitOpen 2:cf42e62a97dc 198 /* Data cache clean */
MikamiUitOpen 2:cf42e62a97dc 199 /* Cache control */
MikamiUitOpen 2:cf42e62a97dc 200 {
MikamiUitOpen 2:cf42e62a97dc 201 uint32_t start_addr = (uint32_t)&m_thunk & 0xFFFFFFE0;
MikamiUitOpen 2:cf42e62a97dc 202 uint32_t end_addr = (uint32_t)&m_thunk + sizeof(m_thunk);
MikamiUitOpen 2:cf42e62a97dc 203 uint32_t addr;
MikamiUitOpen 2:cf42e62a97dc 204
MikamiUitOpen 2:cf42e62a97dc 205 /* Data cache clean and invalid */
MikamiUitOpen 2:cf42e62a97dc 206 for (addr = start_addr; addr < end_addr; addr += 0x20) {
MikamiUitOpen 2:cf42e62a97dc 207 __v7_clean_inv_dcache_mva((void *)addr);
MikamiUitOpen 2:cf42e62a97dc 208 }
MikamiUitOpen 2:cf42e62a97dc 209 /* Instruction cache invalid */
MikamiUitOpen 2:cf42e62a97dc 210 __v7_inv_icache_all();
MikamiUitOpen 2:cf42e62a97dc 211 __ca9u_inv_tlb_all();
MikamiUitOpen 2:cf42e62a97dc 212 __v7_inv_btac();
MikamiUitOpen 2:cf42e62a97dc 213 }
MikamiUitOpen 2:cf42e62a97dc 214 #endif
MikamiUitOpen 2:cf42e62a97dc 215 __ISB();
MikamiUitOpen 2:cf42e62a97dc 216 __DSB();
MikamiUitOpen 2:cf42e62a97dc 217 }
MikamiUitOpen 2:cf42e62a97dc 218 };
MikamiUitOpen 2:cf42e62a97dc 219
MikamiUitOpen 2:cf42e62a97dc 220 #endif/*__CTHUNK_H__*/