gearmulator

Emulation of classic VA synths of the late 90s/2000s that are based on Motorola 56300 family DSPs
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lcd.cpp (821B)

      1 #include "lcd.h"
      2 
      3 #include "mqtypes.h"
      4 
      5 #include "mc68k/port.h"
      6 
      7 namespace mqLib
      8 {
      9 	bool LCD::exec(mc68k::Port& _portGp, const mc68k::Port& _portF)
     10 	{
     11 		if(_portF.getWriteCounter() == m_lastWriteCounter)
     12 			return false;
     13 
     14 		m_lastWriteCounter = _portF.getWriteCounter();
     15 
     16 		const auto f = _portF.read();
     17 		const auto g = _portGp.read();
     18 		const auto df = _portF.getDirection();
     19 		//const auto dg = _portGp.getDirection();
     20 
     21 		const auto registerSelect = (f>>LcdRS) & 1;
     22 		const auto read = (f>>LcdRW) & 1;
     23 		const auto opEnable = ((f & df)>>LcdLatch) & 1;
     24 
     25 		// falling edge triggered
     26 		const auto execute = m_lastOpState && !opEnable;
     27 
     28 		m_lastOpState = opEnable;
     29 
     30 		if(!execute)
     31 			return false;
     32 
     33 		const auto res = hwLib::LCD::exec(registerSelect, read, g);
     34 
     35 		if(res)
     36 			_portGp.writeRX(*res);
     37 
     38 		return true;
     39 	}
     40 }