SDSPI_MakeCmd
Default mainpageat91libmemoriessdmmcSDSPI_MakeCmd
Description Source Call Graph
Start Line: 247
void SDSPI_MakeCmd(unsigned char *pCmdToken, unsigned int arg)
{
    unsigned char sdCmdNum;
    unsigned char crc = 0;
    unsigned char crcPrev = 0;

    sdCmdNum = 0x3f & *pCmdToken;
    *pCmdToken = sdCmdNum | 0x40;
    *(pCmdToken+1) = (arg >> 24) & 0xff;
    *(pCmdToken+2) = (arg >> 16) & 0xff;
    *(pCmdToken+3) = (arg >> 8) & 0xff;
    *(pCmdToken+4) = arg & 0xff;

    crc = crc7(crcPrev, (unsigned char *)(pCmdToken), 5);

    *(pCmdToken+5) = (crc << 1) | 1;
}