tcDspMmc

Introduction

The tcDspMmc class is used to provide access to a standard MultiMedia card storage device via the MityDSP generic SPI interface. An instance of the tcDspSpi class, and an output latch selector and ID must be provided in the constructor.

See also:

MityDSP::tcDspSpi Class Reference

MityDSP::tcDspMmc Class Reference

Example

This is a simple example of tcDspMmc creation and usage:

 {
     unsigned int       gnSPI_BASE_ADDR = 0xB0000200;
     int                bytes, myLatchID = 1;
     char               lpBuffer[1024];
     tcDspOutputLatch   MyClass::mpOutputLatch;
     tcDspSpi          *MyClass::mpSpi;
     tcDspMmc          *MyClass::mpMmc;

     // create access to the SPI
     mpSpi = new tcDspSpi((void *)gnSPI_BASE_ADDR);

     // create access to MMC on SPI with provided CS latch
     mpMmc = new tcDspMmc(mpSpi, mpOutputLatch, myLatchID);

     tcDspError::report(__FILE__, __LINE__, status,
                        "MMC Device Size is %.1f KB",
                        mpMmc->getSizeKB());

     // read 1K of data from sector 7
     bytes = mpMmc->read(7, 0, (void *)lpBuffer, sizeof(lpBuffer));

     // do something application-specific
     ...

     // write 512 bytes to disk, at an offset of 2K into the MMC
     bytes = mpMmc->write((void *)0x800, (void *)lpBuffer, 512);

     ...
 }