Diff: SDCard.h

Revision:

0:f3870f76a890

Child:

1:94c648931f84

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDCard.h	Sun Jul 18 21:26:24 2010 +0000
@@ -0,0 +1,47 @@
+#ifndef SDCardLibrary
+#define SDCardLibrary
+
+#include "stdint.h"
+#include "mbed.h"
+
+class SDCard
+{
+    private:
+        SPI DataLines;
+        DigitalOut ChipSelect;
+        unsigned char CommandCRCTable[256];
+            //CRC7 lookup table
+        unsigned char DataCRCTable[512];
+            //CRC CCITT lookup table
+        unsigned char OCR[4];
+            //operating condition register
+        unsigned char CSD[16];
+            //card-specific data register
+        bool Version;
+            //card version, low for 1, high for 2
+        bool Capacity;
+            //low for low-capacity, high for high-capacity
+        bool CRCMode;
+            //low to disable CRCs, high to enable CRCs
+        unsigned char Workspace[5];
+            //generic information holder
+
+        bool Initialize();
+            //complete all initialization operations, returns 1 if operation successful
+        void Command(unsigned char Index, unsigned int Argument, unsigned char* Response);
+            //sends command to the SD card
+        char CommandCRC(unsigned char* IndexPtr, unsigned int* ArgumentPtr);
+        void DataCRC(unsigned short Length, unsigned char* Data, unsigned char* Result);
+            //calculates the CRC result of the input with a lookup table
+        void GenerateCRCTable(unsigned char Size, unsigned long long Generator, unsigned char* Table);
+            //pre-calculates CRC results for efficient checking
+
+    public:
+        SDCard(PinName mosi, PinName miso, PinName sck, PinName cs);
+        bool Write(unsigned int Address, unsigned char* Data);
+            //write data to the card
+        bool Read(unsigned int Address, unsigned char* Data);
+            //read data from the card
+};
+
+#endif
\ No newline at end of file