Karl Zweimüller / UniGraphic

UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC

Dependents:   UniGraphic-St7920-Test AfficheurUTILECO

Fork of UniGraphic by GraphicsDisplay

Fork of the UniGraphic-Library for monochrome LCDs with ST7920 controller and 128x64-IIC-OLED-Display with SH1106-Controller

/media/uploads/charly/20170522_210344.jpg

/media/uploads/charly/20180425_230623.jpg

Had to adapt LCD for following reasons:

  • Give access to screenbuffer buffer[] to parent class
  • pixel() and pixel_read() as they are hardware-dependent
  • added reset-pin to IIC-Interface

GraphicDisplay:: sends buffer to LCD when auto_update is set to true.

Testprogram for ST7920 can be found here:

https://developer.mbed.org/users/charly/code/UniGraphic-St7920-Test/

Protocols/SPI8.cpp

Committer:
Geremia
Date:
2015-02-12
Revision:
0:75ec1b3cde17
Child:
1:ff019d22b275

File content as of revision 0:75ec1b3cde17:

#include "SPI8.h"

//#define USE_CS

SPI8::SPI8(PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC)
    : _CS(CS), _spi(mosi, miso, sclk), _reset(reset), _DC(DC)
{
    _reset = 1;
    _DC=1;
    _CS=1;
    _spi.format(8,0);                  // 8 bit spi mode 0
 //   _spi.frequency(12000000);          // 10 Mhz SPI clock, 12mhz for F411
    _spi.frequency(10000000);
    hw_reset();    
}

void SPI8::wr_cmd(unsigned char cmd)
{   
#ifdef USE_CS
    _CS = 0;
#endif    
    _DC.write(0); // 0=cmd
    _spi.write(cmd);      // write 8bit
#ifdef USE_CS
    _CS = 1;
#endif
}
void SPI8::wr_data8(unsigned char data8)
{
#ifdef USE_CS
    _CS = 0;
#endif
    _DC.write(1); // 1=data
    _spi.write(data8);    // write 8bit
#ifdef USE_CS
    _CS = 1;
#endif
}
void SPI8::wr_data8(unsigned char data8, unsigned int count)
{
#ifdef USE_CS
    _CS = 0;
#endif
    _DC.write(1); // 1=data
    while(count)
    {
        _spi.write(data8);    // write 8bit
        count--;
    }
#ifdef USE_CS
    _CS = 1;
#endif
}
void SPI8::wr_data8buf(unsigned char* data8, unsigned int lenght)
{
#ifdef USE_CS
    _CS = 0;
#endif
    _DC.write(1); // 1=data
    while(lenght)
    {
        _spi.write(*data8++);    // write 8bit
       // data8++;
        lenght--;
    }
#ifdef USE_CS
    _CS = 1;
#endif
}
void SPI8::hw_reset()
{
    wait_ms(15);
    _DC = 1;
 //   _CS = 1;
    _CS = 0;
    _reset = 0;                        // display reset
    wait_us(50);
    _reset = 1;                       // end reset
    wait_ms(15);
#ifndef USE_CS
    _CS=0;      // put CS low now and forever
#endif
}
void SPI8::BusEnable(bool enable)
{
    _CS = enable ? 0:1;
}