Samuel Mokrani / Mbed 2 deprecated USBMSD_SD_HelloWorld_Mbed

USBMSD SD card Hello World for Mbed platforms

Dependencies:   mbed USBMSD_SD USBDevice

USBDevice/USBMSD/AT45.h@2:27a7e7f8d399, 2011-11-11 (annotated)

Committer:
samux
Date:
Fri Nov 11 15:22:53 2011 +0000
Revision:
2:27a7e7f8d399
we have 2MB with the sdcard!!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 2:27a7e7f8d399 1 /* mbed Library - AT45
samux 2:27a7e7f8d399 2 * Copyright (c) 2008, cstyles
samux 2:27a7e7f8d399 3
samux 2:27a7e7f8d399 4
samux 2:27a7e7f8d399 5 Class to make the AT45 SPI flash parts from ATMEL appear as SRAM or 512 byte block devices
samux 2:27a7e7f8d399 6
samux 2:27a7e7f8d399 7 This class supports 011,021,041,081,161,321,641 variants of the AT45DBxxx family
samux 2:27a7e7f8d399 8
samux 2:27a7e7f8d399 9 || Code || Density || Page size || Pages || Package ||
samux 2:27a7e7f8d399 10 || 011 || 1 || 256 || 512 || 8 SOIC ||
samux 2:27a7e7f8d399 11 || 021 || 2 || 256 || 1024 || 8 SOIC ||
samux 2:27a7e7f8d399 12 || 041 || 4 || 256 || 2048 || 8 SOIC ||
samux 2:27a7e7f8d399 13 || 081 || 8 || 256 || 4096 || 8 SOIC ||
samux 2:27a7e7f8d399 14 || 161 || 16 || 512 || 4096 || 8 SOIC ||
samux 2:27a7e7f8d399 15 || 321 || 32 || 512 || 8192 || 8 SOIC ||
samux 2:27a7e7f8d399 16 || 641 || 64 || 1024 || 8192 || 28 TSOP ||
samux 2:27a7e7f8d399 17
samux 2:27a7e7f8d399 18 To do :
samux 2:27a7e7f8d399 19
samux 2:27a7e7f8d399 20 - Check for current status on Erase Chip command not working.
samux 2:27a7e7f8d399 21
samux 2:27a7e7f8d399 22 */
samux 2:27a7e7f8d399 23
samux 2:27a7e7f8d399 24 #ifndef MBED_AT45_H
samux 2:27a7e7f8d399 25 #define MBED_AT45_H
samux 2:27a7e7f8d399 26
samux 2:27a7e7f8d399 27 #include "mbed.h"
samux 2:27a7e7f8d399 28
samux 2:27a7e7f8d399 29 class AT45 {
samux 2:27a7e7f8d399 30
samux 2:27a7e7f8d399 31 // Public functions
samux 2:27a7e7f8d399 32 public:
samux 2:27a7e7f8d399 33
samux 2:27a7e7f8d399 34 AT45(PinName mosi = p5, PinName miso = p6, PinName clk = p7, PinName ncs = p8);
samux 2:27a7e7f8d399 35
samux 2:27a7e7f8d399 36 void erase (void);
samux 2:27a7e7f8d399 37
samux 2:27a7e7f8d399 38 // Integer RAM access
samux 2:27a7e7f8d399 39 char read (int address); // read int from address. Automatically word-aligns address
samux 2:27a7e7f8d399 40 void write (int address, char data); // Write int to address. Automatically world-aligns address
samux 2:27a7e7f8d399 41
samux 2:27a7e7f8d399 42 // Block device access
samux 2:27a7e7f8d399 43 int blocks (void); // returns the number of 512 byte blocks
samux 2:27a7e7f8d399 44 int blockread (char* data, int block); // read a block
samux 2:27a7e7f8d399 45 int blockwrite (char* data, int block); // write a block
samux 2:27a7e7f8d399 46 int blockerase (int block); // erase a block
samux 2:27a7e7f8d399 47
samux 2:27a7e7f8d399 48 // Part interrogation
samux 2:27a7e7f8d399 49 int size (void); // Device size in bytes
samux 2:27a7e7f8d399 50 int pages (void); // Device size in bytes
samux 2:27a7e7f8d399 51 int pagesize (void); // Device size in bytes
samux 2:27a7e7f8d399 52
samux 2:27a7e7f8d399 53 int id (void); // ID of part
samux 2:27a7e7f8d399 54 int status (void); // Status register
samux 2:27a7e7f8d399 55 void pollbusy (void); // Wait until Flash is not busy
samux 2:27a7e7f8d399 56
samux 2:27a7e7f8d399 57 // Private variables
samux 2:27a7e7f8d399 58 private :
samux 2:27a7e7f8d399 59
samux 2:27a7e7f8d399 60 SPI _spi;
samux 2:27a7e7f8d399 61 DigitalOut _ncs;
samux 2:27a7e7f8d399 62
samux 2:27a7e7f8d399 63 int _pages; // Integer number of pages
samux 2:27a7e7f8d399 64 int _pagesize; // page size, in bytes
samux 2:27a7e7f8d399 65 int _devicesize; // device size in bytes
samux 2:27a7e7f8d399 66 int _blocks; // Number of 512 byte blocks
samux 2:27a7e7f8d399 67
samux 2:27a7e7f8d399 68 // Some flags for buffering
samux 2:27a7e7f8d399 69 int _buffer1address;
samux 2:27a7e7f8d399 70 int _buffer2address;
samux 2:27a7e7f8d399 71 int _lru;
samux 2:27a7e7f8d399 72
samux 2:27a7e7f8d399 73 // Helper routunes
samux 2:27a7e7f8d399 74 void _reset();
samux 2:27a7e7f8d399 75 void _select();
samux 2:27a7e7f8d399 76 void _deselect();
samux 2:27a7e7f8d399 77 void _pollbusy (void);
samux 2:27a7e7f8d399 78
samux 2:27a7e7f8d399 79 // accessing SRAM buffers
samux 2:27a7e7f8d399 80 void _sramwrite (int buffer, int address, int data);
samux 2:27a7e7f8d399 81 int _sramread (int buffer, int address);
samux 2:27a7e7f8d399 82
samux 2:27a7e7f8d399 83 // Transferring SRAM buffers to/from FLASH
samux 2:27a7e7f8d399 84 void _flashwrite (int buffer, int paddr);
samux 2:27a7e7f8d399 85 void _flashread (int buffer, int paddr);
samux 2:27a7e7f8d399 86
samux 2:27a7e7f8d399 87 // Allocate buffer
samux 2:27a7e7f8d399 88 int _allocatebuffer(int address);
samux 2:27a7e7f8d399 89 void _flushbuffer(int buffer);
samux 2:27a7e7f8d399 90
samux 2:27a7e7f8d399 91 // Reading FLASH directly
samux 2:27a7e7f8d399 92 int _memread (int address);
samux 2:27a7e7f8d399 93
samux 2:27a7e7f8d399 94 // Calculate page/subpage addresses
samux 2:27a7e7f8d399 95 int _getpaddr (int);
samux 2:27a7e7f8d399 96 int _getbaddr (int);
samux 2:27a7e7f8d399 97
samux 2:27a7e7f8d399 98 // Send 3 byte address
samux 2:27a7e7f8d399 99 void _sendaddr (int address);
samux 2:27a7e7f8d399 100
samux 2:27a7e7f8d399 101 };
samux 2:27a7e7f8d399 102
samux 2:27a7e7f8d399 103 #endif