Function Scan_setup

Scan/Deprecated/DPH/scan_loop.c:211–313

Initial setup for cap sense controller

// Initial setup for cap sense controller
inline void Scan_setup()
{
	// Register Scan CLI dictionary
	CLI_registerDictionary( scanCLIDict, scanCLIDictName );

	// Scan for active strobes
	// NOTE1: On IBM PCBs, each strobe line that is *NOT* used is connected to GND.
	//       This means, the strobe GPIO can be set to Tri-State pull-up to detect which strobe lines are not used.
	// NOTE2: This will *NOT* detect floating strobes.
	// NOTE3: Rev 0.4, the strobe numbers are reversed, so D0 is actually strobe 0 and C7 is strobe 17
	info_print("Detecting Strobes...");

	DDRC  = 0;
	PORTC = C_MASK;
	DDRD  = 0;
	PORTD = D_MASK;
	DDRE  = 0;
	PORTE = E_MASK;

	// Initially there are 0 strobes
	total_strobes = 0;

	// Iterate over each the strobes
	for ( uint8_t strobe = 0; strobe < MAX_STROBES; strobe++ )
	{
		uint8_t detected = 0;

		// If PIN is high, then strobe is *NOT* connected to GND and may be a strobe
		switch ( strobe )
		{

		// Strobe Mappings
		//              Rev  Rev
		//              0.2  0.4
#ifndef REV0_4_DEBUG // XXX These pins should be reworked, and connect to GND on Rev 0.4
		case 0:  // D0   0   n/c
		case 1:  // D1   1   n/c
#endif
		case 2:  // D2   2   15
		case 3:  // D3   3   14
		case 4:  // D4   4   13
		case 5:  // D5   5   12
		case 6:  // D6   6   11
		case 7:  // D7   7   10
			detected = PIND & (1 << strobe);
			break;

		case 8:  // E0   8    9
		case 9:  // E1   9    8
			detected = PINE & (1 << (strobe - 8));
			break;

		case 10: // C0  10    7
		case 11: // C1  11    6
		case 12: // C2  12    5
		case 13: // C3  13    4
		case 14: // C4  14    3
		case 15: // C5  15    2