void init_SD_card(void)
{
//
// Enable MMCHS
//
PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK);
//
// Reset MMCHS
//
PRCMPeripheralReset(PRCM_SDHOST);
//
// Configure MMCHS
//
SDHostInit(SDHOST_BASE);
//
// Configure card clock
//
SDHostSetExpClk(SDHOST_BASE, PRCMPeripheralClockGet(PRCM_SDHOST), 15000000);
}
int ComputeSHA(const char *sourceFile, uint8_t *resultHash) {
long sfileHandle = -1;
unsigned long sToken = 0;
long retVal = 0;
unsigned long bytesRead = 0;
unsigned long readsize = 0;
uint8_t buffer[BLOCKSIZE];
SlFsFileInfo_t sFileInfo;
UART_PRINT("\r\nStarted comuting hash\r\n");
//Enable MD5SHA module
PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK);
MAP_SHAMD5IntRegister(SHAMD5_BASE, SHAMD5IntHandler);
//reset modul
PRCMPeripheralReset(PRCM_DTHE);
//clear flags
g_bContextReadyFlag = false;
g_bInputReadyFlag = false;
//Enable Interrupts
SHAMD5IntEnable(SHAMD5_BASE, SHAMD5_INT_CONTEXT_READY | SHAMD5_INT_PARTHASH_READY | SHAMD5_INT_INPUT_READY | SHAMD5_INT_OUTPUT_READY);
//wait for context ready flag.
while (!g_bContextReadyFlag)
;
//Configure SHA/MD5 module
SHAMD5ConfigSet(SHAMD5_BASE, SHAMD5_ALGO_SHA1);
// get file size
retVal = sl_FsGetInfo((unsigned char *) sourceFile, sToken, &sFileInfo);
if (retVal < 0) {
// File Doesn't exit create a new of 45 KB file
UART_PRINT("Error during opening the source file\r\n");
return -1;
}
// open the source file for reading
retVal = sl_FsOpen((unsigned char *) sourceFile, FS_MODE_OPEN_READ, &sToken, &sfileHandle);
if (retVal < 0) {
UART_PRINT("Error during opening the source file\r\n");
return -1;
}
SHAMD5DataLengthSet(SHAMD5_BASE, (uint32_t) sFileInfo.FileLen);
// Copy the files from temporary file to original file
// If user file has checksum which can be used to verify the temporary
// file then file should be verified before copying
while (bytesRead < sFileInfo.FileLen) {
if ((sFileInfo.FileLen - bytesRead) > BLOCKSIZE) readsize = BLOCKSIZE;
else readsize = (sFileInfo.FileLen - bytesRead);
memset(buffer, 0, sizeof(buffer));
retVal = sl_FsRead(sfileHandle, bytesRead, (unsigned char *) buffer, readsize);
if (retVal < 0) {
// Error close the file and delete the temporary file
retVal = sl_FsClose(sfileHandle, 0, 0, 0);
UART_PRINT("Error during reading the file\r\n");
return -1;
}
SHAMD5DataWrite(SHAMD5_BASE, buffer);
bytesRead += readsize;
}
// Close the opened files
retVal = sl_FsClose(sfileHandle, 0, 0, 0);
if (retVal < 0) {
// Error close the file and delete the temporary file
UART_PRINT("Error during close the file\r\n");
return -1;
}
UART_PRINT("Hash successfully\r\n");
SHAMD5ResultRead(SHAMD5_BASE, resultHash);
return 0;
}
