TM4C129ENCPDT: SHAMD5 - SHA256 on non consecutive memory blocks

Hello Bob

Thanks for the response.

While I was waiting for a response I had another go at doing something myself and cam up with the following:

First Initialise the hardware:

			SHAMD5Reset(SHAMD5_BASE);
			SHAMD5ConfigSet(SHAMD5_BASE, SHAMD5_ALGO_SHA256);
			SHAMD5HashLengthSet(SHAMD5_BASE, size);

Then I write 1 or more blocks of 64 (Can be called multiple times till end of full 64 byte blocks reached.

//============================================================
// Write blocks of 64 bytes to SHAMD5
//============================================================
void SHAMD5DataWriteBlocks(uint32_t ui32Base, uint32_t * pui32Src, int BlockCount)
{
	while (BlockCount > 0)
	{
		SHAMD5DataWrite(ui32Base, pui32Src);
		BlockCount--;
		pui32Src += 16;
	}
}	// SHAMD5DataWriteBlocks

Finally if any more data left that is less than the 64 bytes I call

//============================================================
// Write the last bytes and close the hash
//============================================================
void SHAMD5DataWriteLast(uint32_t ui32Base, uint32_t * pui32Src, int length)
{
	uint32_t ui32Counter;

	// Wait for the module to be ready to accept data.
	while ((HWREG(ui32Base + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_INPUT_READY) == 0)
	{
	}

	// Write the available data.
	for (ui32Counter = 0; ui32Counter < length; ui32Counter += 4)
	{
		HWREG(ui32Base + SHAMD5_O_DATA_0_IN + ui32Counter) = *pui32Src++;
	}
} // SHAMD5DataWriteLast

Then I wait for it to finish and read the result into a suitable buffer

			// Wait for the output to be ready.
			while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0)
			{
			}

			// Read the result.
			SHAMD5ResultRead(SHAMD5_BASE, (uint32_t *)hash256);

I have tested this with both SHA1 and SHA256 and works fine for me