David Wilson
SD Card test
SDFileSystem.h@0:cca5efd78157, 2010-04-23 (annotated)
- Committer:
- dgwilson
- Date:
- Fri Apr 23 08:29:01 2010 +0000
- Revision:
- 0:cca5efd78157
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dgwilson | 0:cca5efd78157 | 1 | /* mbed Microcontroller Library - SDFileSystem |
| dgwilson | 0:cca5efd78157 | 2 | * Copyright (c) 2008-2009, sford |
| dgwilson | 0:cca5efd78157 | 3 | */ |
| dgwilson | 0:cca5efd78157 | 4 | |
| dgwilson | 0:cca5efd78157 | 5 | // VERY DRAFT CODE!!! |
| dgwilson | 0:cca5efd78157 | 6 | |
| dgwilson | 0:cca5efd78157 | 7 | #ifndef SDFILESYSTEM_H |
| dgwilson | 0:cca5efd78157 | 8 | #define SDFILESYSTEM_H |
| dgwilson | 0:cca5efd78157 | 9 | |
| dgwilson | 0:cca5efd78157 | 10 | #include "mbed.h" |
| dgwilson | 0:cca5efd78157 | 11 | #include "FATFileSystem.h" |
| dgwilson | 0:cca5efd78157 | 12 | |
| dgwilson | 0:cca5efd78157 | 13 | /* Class: SDFileSystem |
| dgwilson | 0:cca5efd78157 | 14 | * Access the filesystem on an SD Card using SPI |
| dgwilson | 0:cca5efd78157 | 15 | * |
| dgwilson | 0:cca5efd78157 | 16 | * Example: |
| dgwilson | 0:cca5efd78157 | 17 | * > SDFileSystem sd(p5, p6, p7, p12, "sd"); |
| dgwilson | 0:cca5efd78157 | 18 | * > |
| dgwilson | 0:cca5efd78157 | 19 | * > int main() { |
| dgwilson | 0:cca5efd78157 | 20 | * > FILE *fp = fopen("/sd/myfile.txt", "w"); |
| dgwilson | 0:cca5efd78157 | 21 | * > fprintf(fp, "Hello World!\n"); |
| dgwilson | 0:cca5efd78157 | 22 | * > fclose(fp); |
| dgwilson | 0:cca5efd78157 | 23 | * > } |
| dgwilson | 0:cca5efd78157 | 24 | */ |
| dgwilson | 0:cca5efd78157 | 25 | class SDFileSystem : public FATFileSystem { |
| dgwilson | 0:cca5efd78157 | 26 | public: |
| dgwilson | 0:cca5efd78157 | 27 | |
| dgwilson | 0:cca5efd78157 | 28 | /* Constructor: SDFileSystem |
| dgwilson | 0:cca5efd78157 | 29 | * Create the File System for accessing an SD Card using SPI |
| dgwilson | 0:cca5efd78157 | 30 | * |
| dgwilson | 0:cca5efd78157 | 31 | * Variables: |
| dgwilson | 0:cca5efd78157 | 32 | * mosi - SPI mosi pin connected to SD Card |
| dgwilson | 0:cca5efd78157 | 33 | * miso - SPI miso pin conencted to SD Card |
| dgwilson | 0:cca5efd78157 | 34 | * sclk - SPI sclk pin connected to SD Card |
| dgwilson | 0:cca5efd78157 | 35 | * cs - DigitalOut pin used as SD Card chip select |
| dgwilson | 0:cca5efd78157 | 36 | * name - The name used to access the filesystem |
| dgwilson | 0:cca5efd78157 | 37 | */ |
| dgwilson | 0:cca5efd78157 | 38 | SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name); |
| dgwilson | 0:cca5efd78157 | 39 | virtual int disk_initialize(); |
| dgwilson | 0:cca5efd78157 | 40 | virtual int disk_write(const char *buffer, int block_number); |
| dgwilson | 0:cca5efd78157 | 41 | virtual int disk_read(char *buffer, int block_number); |
| dgwilson | 0:cca5efd78157 | 42 | virtual int disk_status(); |
| dgwilson | 0:cca5efd78157 | 43 | virtual int disk_sync(); |
| dgwilson | 0:cca5efd78157 | 44 | virtual int disk_sectors(); |
| dgwilson | 0:cca5efd78157 | 45 | |
| dgwilson | 0:cca5efd78157 | 46 | protected: |
| dgwilson | 0:cca5efd78157 | 47 | |
| dgwilson | 0:cca5efd78157 | 48 | int _cmd(int cmd, int arg); |
| dgwilson | 0:cca5efd78157 | 49 | int _cmdx(int cmd, int arg); |
| dgwilson | 0:cca5efd78157 | 50 | int _cmd41(); |
| dgwilson | 0:cca5efd78157 | 51 | int _cmd8(); |
| dgwilson | 0:cca5efd78157 | 52 | int _cmd58(); |
| dgwilson | 0:cca5efd78157 | 53 | int initialise_card(); |
| dgwilson | 0:cca5efd78157 | 54 | int initialise_card_v1(); |
| dgwilson | 0:cca5efd78157 | 55 | int initialise_card_v2(); |
| dgwilson | 0:cca5efd78157 | 56 | |
| dgwilson | 0:cca5efd78157 | 57 | |
| dgwilson | 0:cca5efd78157 | 58 | int _read(char *buffer, int length); |
| dgwilson | 0:cca5efd78157 | 59 | int _write(const char *buffer, int length); |
| dgwilson | 0:cca5efd78157 | 60 | int _sd_sectors(); |
| dgwilson | 0:cca5efd78157 | 61 | int _sectors; |
| dgwilson | 0:cca5efd78157 | 62 | |
| dgwilson | 0:cca5efd78157 | 63 | SPI _spi; |
| dgwilson | 0:cca5efd78157 | 64 | DigitalOut _cs; |
| dgwilson | 0:cca5efd78157 | 65 | |
| dgwilson | 0:cca5efd78157 | 66 | struct CSD_REGISTER { |
| dgwilson | 0:cca5efd78157 | 67 | unsigned reserved1:4; |
| dgwilson | 0:cca5efd78157 | 68 | unsigned reserved2:3; |
| dgwilson | 0:cca5efd78157 | 69 | unsigned low_voltage:1; |
| dgwilson | 0:cca5efd78157 | 70 | unsigned reserved3:7; |
| dgwilson | 0:cca5efd78157 | 71 | unsigned volt_27_28:1; |
| dgwilson | 0:cca5efd78157 | 72 | unsigned volt_28_29:1; |
| dgwilson | 0:cca5efd78157 | 73 | unsigned volt_29_30:1; |
| dgwilson | 0:cca5efd78157 | 74 | unsigned volt_30_31:1; |
| dgwilson | 0:cca5efd78157 | 75 | unsigned volt_31_32:1; |
| dgwilson | 0:cca5efd78157 | 76 | unsigned volt_32_33:1; |
| dgwilson | 0:cca5efd78157 | 77 | unsigned volt_33_34:1; |
| dgwilson | 0:cca5efd78157 | 78 | unsigned volt_34_35:1; |
| dgwilson | 0:cca5efd78157 | 79 | unsigned volt_35_36:1; |
| dgwilson | 0:cca5efd78157 | 80 | unsigned reserved:6; |
| dgwilson | 0:cca5efd78157 | 81 | unsigned card_capacity_status:1; |
| dgwilson | 0:cca5efd78157 | 82 | unsigned card_power_up_status:1; |
| dgwilson | 0:cca5efd78157 | 83 | }; |
| dgwilson | 0:cca5efd78157 | 84 | }; |
| dgwilson | 0:cca5efd78157 | 85 | |
| dgwilson | 0:cca5efd78157 | 86 | #endif |