iusbreadsector.c

来自「How to control USB interface under SZ pl」· C语言 代码 · 共 19 行

// read data from sector _gUsbCurSector of drive _gUsbDrvNum
// _gUsbCurSector and _gUsbNumSector will be updated afterwards

#include "usb_pvar.h"
#include "usb_pptt.h"

void _iUsbReadSector(void)
{
    // call callback function provided by caller
    (*((_gUsbCallbacks->Drv[_gUsbDrvNum]).readSector))
        (_gUsbCurSector++, (P_U8)&_gUsbSectorBuf);
        
    // reset pointer to start of buffer
    _gpUsbBufPtr = (P_U16)&_gUsbSectorBuf;        
    
    // decrement number of sectors        
    --_gUsbNumSector;        
}