Olle Sköld / Mbed 2 deprecated DISCO-F746NG_BMP_FROM_SDCARD

This demo reads a bitmap from a FAT formatted SD-card, copies it to flash and displays it on the screen. The demo is based on the following project: https://os.mbed.com/users/DieterGraef/code/DISCO-F746NG_SDFileSystem/

Dependencies:   LCD_DISCO_F746NG TS_DISCO_F746NG mbed FATFileSystem

Fork of DISCO-F746NG_SDFileSystem by Dieter Graef

SDFileSystem/SDFileSystem.h@4:95e30a911d97, 2018-04-19 (annotated)

Committer:
Lightsource
Date:
Thu Apr 19 19:59:54 2018 +0000
Revision:
4:95e30a911d97
Demo that reads a bitmap from SD-card, copies it to flash and displays it on the screen.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Lightsource 4:95e30a911d97 1 /* SD/MMC File System Library
Lightsource 4:95e30a911d97 2 * Copyright (c) 2016 Neil Thiessen
Lightsource 4:95e30a911d97 3 * Modified for the use with STM32F746 Discovery (C) 2016 Dieter Greaf
Lightsource 4:95e30a911d97 4 * Licensed under the Apache License, Version 2.0 (the "License");
Lightsource 4:95e30a911d97 5 * you may not use this file except in compliance with the License.
Lightsource 4:95e30a911d97 6 * You may obtain a copy of the License at
Lightsource 4:95e30a911d97 7 *
Lightsource 4:95e30a911d97 8 * http://www.apache.org/licenses/LICENSE-2.0
Lightsource 4:95e30a911d97 9 *
Lightsource 4:95e30a911d97 10 * Unless required by applicable law or agreed to in writing, software
Lightsource 4:95e30a911d97 11 * distributed under the License is distributed on an "AS IS" BASIS,
Lightsource 4:95e30a911d97 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Lightsource 4:95e30a911d97 13 * See the License for the specific language governing permissions and
Lightsource 4:95e30a911d97 14 * limitations under the License.
Lightsource 4:95e30a911d97 15 */
Lightsource 4:95e30a911d97 16
Lightsource 4:95e30a911d97 17 #ifndef SD_FILE_SYSTEM_H
Lightsource 4:95e30a911d97 18 #define SD_FILE_SYSTEM_H
Lightsource 4:95e30a911d97 19
Lightsource 4:95e30a911d97 20 #include "mbed.h"
Lightsource 4:95e30a911d97 21 #include "stm32746g_discovery_sd.h"
Lightsource 4:95e30a911d97 22 #include "FATFileSystem.h"
Lightsource 4:95e30a911d97 23
Lightsource 4:95e30a911d97 24 /** SDFileSystem class.
Lightsource 4:95e30a911d97 25 * Used for creating a virtual file system for accessing SD/MMC cards via SPI.
Lightsource 4:95e30a911d97 26 *
Lightsource 4:95e30a911d97 27 * Example:
Lightsource 4:95e30a911d97 28 * @code
Lightsource 4:95e30a911d97 29 * #include "mbed.h"
Lightsource 4:95e30a911d97 30 * #include "SDFileSystem.h"
Lightsource 4:95e30a911d97 31 *
Lightsource 4:95e30a911d97 32 * //Create an SDFileSystem object
Lightsource 4:95e30a911d97 33 * SDFileSystem sd("sd");
Lightsource 4:95e30a911d97 34 *
Lightsource 4:95e30a911d97 35 * int main()
Lightsource 4:95e30a911d97 36 * {
Lightsource 4:95e30a911d97 37 * //Mount the filesystem
Lightsource 4:95e30a911d97 38 * sd.mount();
Lightsource 4:95e30a911d97 39 *
Lightsource 4:95e30a911d97 40 * //Perform a write test
Lightsource 4:95e30a911d97 41 * printf("\nWriting to SD card...");
Lightsource 4:95e30a911d97 42 * FILE *fp = fopen("/sd/sdtest.txt", "w");
Lightsource 4:95e30a911d97 43 * if (fp != NULL) {
Lightsource 4:95e30a911d97 44 * fprintf(fp, "We're writing to an SD card!");
Lightsource 4:95e30a911d97 45 * fclose(fp);
Lightsource 4:95e30a911d97 46 * printf("success!\n");
Lightsource 4:95e30a911d97 47 * } else {
Lightsource 4:95e30a911d97 48 * printf("failed!\n");
Lightsource 4:95e30a911d97 49 * }
Lightsource 4:95e30a911d97 50 *
Lightsource 4:95e30a911d97 51 * //Perform a read test
Lightsource 4:95e30a911d97 52 * printf("Reading from SD card...");
Lightsource 4:95e30a911d97 53 * fp = fopen("/sd/sdtest.txt", "r");
Lightsource 4:95e30a911d97 54 * if (fp != NULL) {
Lightsource 4:95e30a911d97 55 * char c = fgetc(fp);
Lightsource 4:95e30a911d97 56 * if (c == 'W')
Lightsource 4:95e30a911d97 57 * printf("success!\n");
Lightsource 4:95e30a911d97 58 * else
Lightsource 4:95e30a911d97 59 * printf("incorrect char (%c)!\n", c);
Lightsource 4:95e30a911d97 60 * fclose(fp);
Lightsource 4:95e30a911d97 61 * } else {
Lightsource 4:95e30a911d97 62 * printf("failed!\n");
Lightsource 4:95e30a911d97 63 * }
Lightsource 4:95e30a911d97 64 *
Lightsource 4:95e30a911d97 65 * //Unmount the filesystem
Lightsource 4:95e30a911d97 66 * sd.unmount();
Lightsource 4:95e30a911d97 67 * }
Lightsource 4:95e30a911d97 68 * @endcode
Lightsource 4:95e30a911d97 69
Lightsource 4:95e30a911d97 70 */
Lightsource 4:95e30a911d97 71 #define CMD59 (0x40 | 59)
Lightsource 4:95e30a911d97 72 using namespace mbed;
Lightsource 4:95e30a911d97 73
Lightsource 4:95e30a911d97 74 class SDFileSystem : public FATFileSystem
Lightsource 4:95e30a911d97 75 {
Lightsource 4:95e30a911d97 76 public:
Lightsource 4:95e30a911d97 77 /** Represents the different card detect switch types
Lightsource 4:95e30a911d97 78 */
Lightsource 4:95e30a911d97 79 enum SwitchType {
Lightsource 4:95e30a911d97 80 SWITCH_NONE, /**< No card detect switch (assumes socket is always occupied) */
Lightsource 4:95e30a911d97 81 SWITCH_POS_NO, /**< Switch shorts to VDD when the socket is occupied (positive logic, normally open) */
Lightsource 4:95e30a911d97 82 SWITCH_POS_NC, /**< Switch shorts to VDD when the socket is empty (positive logic, normally closed) */
Lightsource 4:95e30a911d97 83 SWITCH_NEG_NO, /**< Switch shorts to GND when the socket is occupied (negative logic, normally open) */
Lightsource 4:95e30a911d97 84 SWITCH_NEG_NC /**< Switch shorts to GND when the socket is empty (negative logic, normally closed) */
Lightsource 4:95e30a911d97 85 };
Lightsource 4:95e30a911d97 86
Lightsource 4:95e30a911d97 87 /** Represents the different SD/MMC card types
Lightsource 4:95e30a911d97 88 */
Lightsource 4:95e30a911d97 89 enum CardType {
Lightsource 4:95e30a911d97 90 CARD_NONE, /**< No card is present */
Lightsource 4:95e30a911d97 91 CARD_MMC, /**< MMC card */
Lightsource 4:95e30a911d97 92 CARD_SD, /**< Standard capacity SD card */
Lightsource 4:95e30a911d97 93 CARD_SDHC, /**< High capacity SD card */
Lightsource 4:95e30a911d97 94 CARD_UNKNOWN /**< Unknown or unsupported card */
Lightsource 4:95e30a911d97 95 };
Lightsource 4:95e30a911d97 96
Lightsource 4:95e30a911d97 97 /** Create a virtual file system for accessing SD/MMC cards via SPI
Lightsource 4:95e30a911d97 98 *
Lightsource 4:95e30a911d97 99 * @param mosi The SPI data out pin.
Lightsource 4:95e30a911d97 100 * @param miso The SPI data in pin.
Lightsource 4:95e30a911d97 101 * @param sclk The SPI clock pin.
Lightsource 4:95e30a911d97 102 * @param cs The SPI chip select pin.
Lightsource 4:95e30a911d97 103 * @param name The name used to access the virtual filesystem.
Lightsource 4:95e30a911d97 104 * @param cd The card detect pin.
Lightsource 4:95e30a911d97 105 * @param cdtype The type of card detect switch.
Lightsource 4:95e30a911d97 106 * @param hz The SPI bus frequency (defaults to 1MHz).
Lightsource 4:95e30a911d97 107 */
Lightsource 4:95e30a911d97 108 SDFileSystem( const char* name);
Lightsource 4:95e30a911d97 109
Lightsource 4:95e30a911d97 110 /** Determine whether or not a card is present
Lightsource 4:95e30a911d97 111 *
Lightsource 4:95e30a911d97 112 * @returns
Lightsource 4:95e30a911d97 113 * 'true' if a card is present,
Lightsource 4:95e30a911d97 114 * 'false' if no card is present.
Lightsource 4:95e30a911d97 115 */
Lightsource 4:95e30a911d97 116 bool card_present();
Lightsource 4:95e30a911d97 117
Lightsource 4:95e30a911d97 118 /** Get the detected SD/MMC card type
Lightsource 4:95e30a911d97 119 *
Lightsource 4:95e30a911d97 120 * @returns The detected card type as a CardType enum.
Lightsource 4:95e30a911d97 121 *
Lightsource 4:95e30a911d97 122 * @note Valid after the filesystem has been mounted.
Lightsource 4:95e30a911d97 123 */
Lightsource 4:95e30a911d97 124 SDFileSystem::CardType card_type();
Lightsource 4:95e30a911d97 125
Lightsource 4:95e30a911d97 126 /** Get whether or not CRC is enabled for commands and data
Lightsource 4:95e30a911d97 127 *
Lightsource 4:95e30a911d97 128 * @returns
Lightsource 4:95e30a911d97 129 * 'true' if CRC is enabled for commands and data,
Lightsource 4:95e30a911d97 130 * 'false' if CRC is disabled for commands and data.
Lightsource 4:95e30a911d97 131 */
Lightsource 4:95e30a911d97 132 bool crc();
Lightsource 4:95e30a911d97 133
Lightsource 4:95e30a911d97 134 /** Set whether or not CRC is enabled for commands and data
Lightsource 4:95e30a911d97 135 *
Lightsource 4:95e30a911d97 136 * @param enabled Whether or not to enable CRC for commands and data.
Lightsource 4:95e30a911d97 137 */
Lightsource 4:95e30a911d97 138 void crc(bool enabled);
Lightsource 4:95e30a911d97 139
Lightsource 4:95e30a911d97 140 /** Get whether or not 16-bit frames are enabled for data read/write operations
Lightsource 4:95e30a911d97 141 *
Lightsource 4:95e30a911d97 142 * @returns
Lightsource 4:95e30a911d97 143 * 'true' if 16-bit frames will be used during data read/write operations,
Lightsource 4:95e30a911d97 144 * 'false' if 8-bit frames will be used during data read/write operations.
Lightsource 4:95e30a911d97 145 */
Lightsource 4:95e30a911d97 146 bool large_frames();
Lightsource 4:95e30a911d97 147
Lightsource 4:95e30a911d97 148 /** Set whether or not 16-bit frames are enabled for data read/write operations
Lightsource 4:95e30a911d97 149 *
Lightsource 4:95e30a911d97 150 * @param enabled Whether or not 16-bit frames are enabled for data read/write operations.
Lightsource 4:95e30a911d97 151 */
Lightsource 4:95e30a911d97 152 void large_frames(bool enabled);
Lightsource 4:95e30a911d97 153
Lightsource 4:95e30a911d97 154 /** Get whether or not write validation is enabled for data write operations
Lightsource 4:95e30a911d97 155 *
Lightsource 4:95e30a911d97 156 * @returns
Lightsource 4:95e30a911d97 157 * 'true' if data writes will be verified using CMD13,
Lightsource 4:95e30a911d97 158 * 'false' if data writes will not be verified.
Lightsource 4:95e30a911d97 159 */
Lightsource 4:95e30a911d97 160 bool write_validation();
Lightsource 4:95e30a911d97 161
Lightsource 4:95e30a911d97 162 /** Set whether or not write validation is enabled for data write operations
Lightsource 4:95e30a911d97 163 *
Lightsource 4:95e30a911d97 164 * @param enabled Whether or not write validation is enabled for data write operations.
Lightsource 4:95e30a911d97 165 */
Lightsource 4:95e30a911d97 166 void write_validation(bool enabled);
Lightsource 4:95e30a911d97 167
Lightsource 4:95e30a911d97 168 virtual int unmount();
Lightsource 4:95e30a911d97 169 virtual int disk_initialize();
Lightsource 4:95e30a911d97 170 virtual int disk_status();
Lightsource 4:95e30a911d97 171 virtual int disk_read(uint8_t* buffer, uint32_t sector, uint32_t count);
Lightsource 4:95e30a911d97 172 virtual int disk_write(const uint8_t* buffer, uint32_t sector, uint32_t count);
Lightsource 4:95e30a911d97 173 virtual int disk_sync();
Lightsource 4:95e30a911d97 174 virtual uint32_t disk_sectors();
Lightsource 4:95e30a911d97 175
Lightsource 4:95e30a911d97 176 private:
Lightsource 4:95e30a911d97 177 Timer m_Timer;
Lightsource 4:95e30a911d97 178 InterruptIn m_Cd;
Lightsource 4:95e30a911d97 179 int m_CdAssert;
Lightsource 4:95e30a911d97 180 SDFileSystem::CardType m_CardType;
Lightsource 4:95e30a911d97 181 bool m_Crc;
Lightsource 4:95e30a911d97 182 bool m_LargeFrames;
Lightsource 4:95e30a911d97 183 bool m_WriteValidation;
Lightsource 4:95e30a911d97 184 int m_Status;
Lightsource 4:95e30a911d97 185 HAL_SD_CardInfoTypedef m_CardInfo;
Lightsource 4:95e30a911d97 186 //Internal methods
Lightsource 4:95e30a911d97 187 void onCardRemoval();
Lightsource 4:95e30a911d97 188 void checkSocket();
Lightsource 4:95e30a911d97 189 void DMA2_Stream3_IRQHandler();
Lightsource 4:95e30a911d97 190 void DMA2_Stream6_IRQHandler();
Lightsource 4:95e30a911d97 191 void SDMMC1_IRQHandler();
Lightsource 4:95e30a911d97 192 };
Lightsource 4:95e30a911d97 193
Lightsource 4:95e30a911d97 194 #endif