File content as of revision 10:71359af61af8:

/*******************************************************************************
* Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
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* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
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* OTHER DEALINGS IN THE SOFTWARE.
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
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*******************************************************************************/

#include "Display.hpp"

/// @{
/// Width and height of the display in pixels.
static const int width = 128;
static const int height = 64;
/// @}

Display::Display(PinName mosi, PinName miso, PinName sclk, PinName ssel, PinName a0) :
    m_canvas(width, height), spi(mosi, miso, sclk), cs(ssel, 1), a0(a0, 0)
{
    spi.format(8, 3); // CPOL = 1, CPHA = 1
}

void Display::initialize()
{
    sendCommand(0xA0);
    sendCommand(0xAE);
    sendCommand(0xC0);
    sendCommand(0xA2);
    sendCommand(0x2F);
    sendCommand(0x26);
    sendCommand(0x81);
    sendCommand(0x11);
    sendCommand(0xAF);
}

void Display::update()
{   
    sendCommand(0xAE);
    sendCommand(0x40);
    const int rowsPerPage = 8;
    int row = -rowsPerPage;
    int column = m_canvas.width();
    for (Bitmap::SegmentBuffer::const_iterator it = m_canvas.data().begin(); it != m_canvas.data().end(); it++)
    {
        if (column == m_canvas.width())
        {
            row += rowsPerPage;
            if (row >= height) // Height of the canvas is greater than height of the display.
                break;
            column = 0;
            sendCommand(0xB0 + static_cast<uint8_t>(row / rowsPerPage));
            sendCommand(0x10);
            sendCommand(0x00);
        }
        if (column < width)
        {
            sendData(*it);
        }
        column++;
    }
    sendCommand(0xAF);
}

void Display::sendCommand(uint8_t command)
{
    cs = 0;
    a0 = 0;
    spi.write(command);
    cs = 1;
}

void Display::sendData(uint8_t data)
{
    cs = 0;
    a0 = 1;
    spi.write(data);
    cs = 1;
}