Function Scan_loop

Scan/Deprecated/matrix/scan_loop.c:79–155

Main Detection Loop

// Main Detection Loop
inline uint8_t Scan_loop()
{
	// Check count to see if the sample threshold may have been reached, otherwise collect more data
	if ( Scan_count < MAX_SAMPLES )
	{
		matrix_scan( (uint8_t*)matrix_pinout, KeyIndex_Array );

		// scanDual requires 2 passes, and thus needs more memory per matrix_scan pass
#if scanMode == scanDual
		Scan_count += 2;
#else
		Scan_count++;
#endif

		// Signal Main Detection Loop to continue scanning
		return 0;
	}

	// Reset Sample Counter
	Scan_count = 0;

	// Assess debouncing sample table
	// Loop over all of the sampled keys of the given array
	// If the number of samples is higher than the sample threshold, flag the high bit, clear otherwise
	// This should be resetting VERY quickly, cutting off a potentially valid keypress is not an issue
	for ( uint8_t key = 1; key < KeyIndex_Size + 1; key++ ) if ( ( KeyIndex_Array[key] & ~(1 << 7) ) > SAMPLE_THRESHOLD )
	{
		// Debug output (keypress detected)
		printHex( key );
		print(" ");

		// Add the key to the buffer, if it isn't already in the current Key Buffer
		for ( uint8_t c = 0; c < KeyIndex_BufferUsed + 1; c++ )
		{
			// Key isn't in the buffer yet
			if ( c == KeyIndex_BufferUsed )
			{
				Macro_bufferAdd( key );
				break;
			}

			// Key already in the buffer
			if ( KeyIndex_Buffer[c] == key )
				break;
		}

		KeyIndex_Array[key] = (1 << 7);
	}
	else
	{
		// Remove the key from the buffer only if it was previously known to be pressed
		if ( KeyIndex_Array[key] & (1 << 7 ) )
		{
			// Check for the released key, and shift the other keys lower on the buffer
			for ( uint8_t c = 0; c < KeyIndex_BufferUsed; c++ )
			{
				// Key to release found
				if ( KeyIndex_Buffer[c] == key )