File content as of revision 4:dc3e19dfd45d:

/*#include <avr/pgmspace.h>
#include <util/delay.h>
#include <stdlib.h>*/

#include "Adafruit_GFX.h"
#include "Adafruit_GP9002.h"
#include "glcdfont.c"
#include "bitreversetable256.h"



/*
Adafruit_GP9002::Adafruit_GP9002(int8_t SCLK, int8_t MISO, int8_t MOSI, 
    int8_t CS, int8_t DC) : Adafruit_GFX(128, 64) {
  _sclk = SCLK;
  _miso = MISO;
  _mosi = MOSI;
  _cs = CS;
  _dc = DC;
  hwSPI = false;
}

Adafruit_GP9002::Adafruit_GP9002(int8_t CS, int8_t DC) :
    Adafruit_GFX(128, 64) {
  _sclk = -1;
  _miso = -1;
  _mosi = -1;
  _cs = CS;
  _dc = DC;
  hwSPI = true;
}
*/
Adafruit_GP9002::Adafruit_GP9002(SPI &SPIport, PinName CS, PinName DC): Adafruit_GFX(128, 64), _spi(SPIport), _dc(DC), _cs(CS,1){}  ;


void Adafruit_GP9002::begin(void) {
  // set pin directions
//  pinMode(_dc, OUTPUT);
//  pinMode(_cs, OUTPUT);

/*  if (! hwSPI) {
    pinMode(_mosi, OUTPUT);
    pinMode(_miso, INPUT);
    pinMode(_sclk, OUTPUT);
    
    clkport     = portOutputRegister(digitalPinToPort(_sclk));
    clkpinmask  = digitalPinToBitMask(_sclk);
    mosiport    = portOutputRegister(digitalPinToPort(_mosi));
    mosipinmask = digitalPinToBitMask(_mosi);
    misopin = portInputRegister(digitalPinToPort(_miso));
    misopinmask = digitalPinToBitMask(_miso);
  } else {
  */  
    //SPI.begin();
   // SPI.setClockDivider(SPI_CLOCK_DIV4);
   // SPI.setBitOrder(MSBFIRST);
    //SPI.setDataMode(SPI_MODE0);
     _spi.format(8,3); // I'm sure this is a mode 3 device
     _spi.frequency(2000000); //
 // }
 /*
  csport    = portOutputRegister(digitalPinToPort(_cs));
  cspinmask = digitalPinToBitMask(_cs);
  dcport    = portOutputRegister(digitalPinToPort(_dc));
  dcpinmask = digitalPinToBitMask(_dc);
  */

  command(GP9002_DISPLAYSOFF);
 // command(GP9002_DISPLAY1ON); //defer till display clear
  command(GP9002_DISPLAY);
  dataWrite(GP9002_DISPLAY_GRAYSCALE);
  command(GP9002_LOWERADDR1);
  dataWrite(0x0);
  command(GP9002_HIGHERADDR1);
  dataWrite(0x0);
//  command(GP9002_LOWERADDR2);
//  dataWrite(0x0);
 // command(GP9002_HIGHERADDR2);
//  dataWrite(0x4);
 // command(GP9002_OR);  //contradicted by display1on, so no
  command(GP9002_CLEARSCREEN);
  wait_us(500);
  command(GP9002_DISPLAY1ON);

  // hold the address so we can read and then write
  command(GP9002_ADDRHELD);
  addrcache=-1; //address OK but cmd not set
  bytecache=0; //known because display cleared
}



// updated high speed drawing!
void Adafruit_GP9002::drawFastVLine(int16_t x, int16_t orig_y, int16_t h, uint16_t color) {
  if ((x < 0) || (x >= width()) || (orig_y >= height())) return;
  //if ((orig_y+h) >= height()) 
  //  h = height() - orig_y -1;

  //drawLine(x, orig_y, x, orig_y+h, color); return;

  while (h) {
    if ((h >= 4) && ((orig_y) % 4 == 0)) 
      break;
    drawPixel(x, orig_y, color);
    orig_y++;
    h--;
  }

  if (h >= 4) {
      // calculate addr
      uint16_t addr = 0;
      addr = x*16;
  //    uint16_t y = orig_y+h-8;
       uint16_t y=orig_y;
  //    y = 63 - y;                 //why?
      addr += y/4;

  //    Serial.println(addr, HEX);  ///debug line ?
      addrcache=-1; //invalidate the cache
      command(GP9002_ADDRINCR);
      command(GP9002_ADDRL);
      dataWrite(addr & 0xFF);
      command(GP9002_ADDRH);
      dataWrite(addr >> 8);
      command(GP9002_DATAWRITE);

      while (h >= 4) {
	// draw 8 pixels at once!
	if (color) 
	  dataWrite(0b01010101 * (color & 3));
	else 
	  dataWrite(0x00);
	h -= 4;
	orig_y += 4;
      }
  }
  while (h+1) {
    drawPixel(x, orig_y-1, color);
    orig_y++;
    h--;
  }

}

// the most basic function, set a single pixel
void Adafruit_GP9002::drawPixel(int16_t x, int16_t y, uint16_t color) {
  if ((x < 0) || (x >= width()) || (y < 0) || (y >= height()))
    return;

  //uint8_t p;
  
  // calculate addr
  uint16_t addr = 0;
  addr = x*16;
 // y = 63 - y;                //why
  addr += y/4;
  if (addr != addrcache)
  {
    addrcache=addr;
    command(GP9002_ADDRHELD);
    command(GP9002_ADDRL);
    dataWrite(addr & 0xFF);
    command(GP9002_ADDRH);
    dataWrite(addr >> 8);
    command(GP9002_DATAREAD);
    dataRead();
    bytecache = dataRead();
    command(GP9002_DATAWRITE); //warning: subsequent drawpixel ops will assume this
  }
  y=0xc0>>((y & 3) <<1);
  color*=0b01010101;
  //Serial.println(p, HEX);
  bytecache &= ~y;

  bytecache |= color&y;
  
  dataWrite(bytecache);
}

  
/* forbidden
void Adafruit_GP9002::invert(bool i) {
  // This is kinda clumsy but it does work
  // fill the opposite screen with all on pixels so we can invert!
  uint16_t addr = 0x400;

  command(GP9002_ADDRINCR);
  command(GP9002_ADDRL);
  dataWrite(addr & 0xFF);
  command(GP9002_ADDRH);
  dataWrite(addr >> 8);
  command(GP9002_DATAWRITE);

  if (i) {
    while (addr < 0x0800) {
      dataWrite(0xFF);
      addr++;
    }
    command(GP9002_XOR);
  } else {
    while (addr < 0x0800) {
      dataWrite(0x00);
      addr++;
    }
    command(GP9002_OR);
  }
  command(GP9002_ADDRHELD);

}
*/
/*
void Adafruit_GP9002::slowSPIwrite(uint8_t d) {
 for (uint8_t i=0; i<8; i++) {
   digitalWrite(_sclk, LOW);
   if (d & _BV(i)) {
     digitalWrite(_mosi, HIGH);
   } else {
     digitalWrite(_mosi, LOW);
   }
   digitalWrite(_sclk, HIGH);
 }
}
*/
/*
inline void Adafruit_GP9002::fastSPIwrite(uint8_t d) {
  if (hwSPI) {
    SPDR = d;
    while(!(SPSR & _BV(SPIF)));
    return;
  }
  for(uint8_t bit = 0x1; bit != 0x00; bit <<= 1) {
    *clkport &= ~clkpinmask;
    if(d & bit) *mosiport |=  mosipinmask;
    else        *mosiport &= ~mosipinmask;
    *clkport |=  clkpinmask;
  }
}
*/
/*
uint8_t Adafruit_GP9002::slowSPIread(void) {
 uint8_t reply = 0;
 for (uint8_t i=0; i<8; i++) {
   digitalWrite(_sclk, LOW);

   digitalWrite(_sclk, HIGH);
   if (digitalRead(_miso)) 
     reply |= _BV(i);
 }
 return reply;
}

inline uint8_t Adafruit_GP9002::fastSPIread(void) {
 uint8_t reply = 0;
 for (uint8_t i=0; i<8; i++) {
   *clkport &= ~clkpinmask;
   
   *clkport |=  clkpinmask;
   if ((*misopin) & misopinmask)
     reply |= _BV(i);
 }
 return reply;
}
*/

void Adafruit_GP9002::command(uint8_t d) { 
/*
  *dcport |= dcpinmask;
  *csport &= ~cspinmask;
  fastSPIwrite(d);
  *csport |= cspinmask;
  delayMicroseconds(1); // should be 400ns actually
*/
_dc=1;
_cs=0;
_spi.write(BitReverseTable256[d]);
_cs=1;
wait_us(1);
}

inline void Adafruit_GP9002::dataWrite(uint8_t d) {
/*
  *dcport &= ~dcpinmask;
  *csport &= ~cspinmask;

  fastSPIwrite(d);

  *csport |= cspinmask;
  delayMicroseconds(1); // should be 600ns actually
*/
_dc=0;
_cs=0;
_spi.write(BitReverseTable256[d]);
_cs=1;
wait_us(1);
}

inline uint8_t Adafruit_GP9002::dataRead() {
  uint8_t r;
/*
  *dcport &= ~dcpinmask;
  *csport &= ~cspinmask;

  r = fastSPIread();

  *csport |= cspinmask;
  delayMicroseconds(1); 
  */

_dc=0;
_cs=0;
r=BitReverseTable256[_spi.write(0)&0xFF];
_cs=1;
wait_us(1);


 return r;
}

void Adafruit_GP9002::setBrightness(uint8_t val) {
  
}

// clear everything
void Adafruit_GP9002::clearDisplay(void) {
  command(GP9002_CLEARSCREEN);

  wait_us(500);
  addrcache=-1; //address OK but cmd not set
}

void Adafruit_GP9002::displayOff(void) {
  command(GP9002_DISPLAYSOFF); 
  addrcache=-1; //address OK but cmd not set
}
void Adafruit_GP9002::displayOn(void) {
   command(GP9002_DISPLAY1ON);
  addrcache=-1; //address OK but cmd not set
}