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#include "maindefs.h"

#include "oled_ssd1331.h"

#include "spi.h"

#include "string.h"

#include "Adafruit_GFX.h"

#include <delays.h>

void SSD1331_Init() {

    GFX_Init(SSD1331_LCDWIDTH, SSD1331_LCDHEIGHT);

}

void SSD1331_Begin() {

    unsigned char buffer[37];

    // Toggle reset pin

    LATBbits.LATB6 = 0;

    Delay10KTCYx(1);

    LATBbits.LATB6 = 1;

    // Initialization Sequence

    buffer[0] = SSD1331_CMD_DISPLAYOFF; // 0xAE

    buffer[1] = SSD1331_CMD_SETREMAP; // 0xA0

#if defined SSD1331_COLORORDER_RGB

    buffer[2] = 0x72; // RGB Color

#else

    buffer[2] = 0x76; // BGR Color

#endif

    buffer[3] = SSD1331_CMD_STARTLINE; // 0xA1

    buffer[4] = 0x0;

    buffer[5] = SSD1331_CMD_DISPLAYOFFSET; // 0xA2

    buffer[6] = 0x0;

    buffer[7] = SSD1331_CMD_NORMALDISPLAY; // 0xA4

    buffer[8] = SSD1331_CMD_SETMULTIPLEX; // 0xA8

    buffer[9] = 0x3F; // 0x3F 1/64 duty

    buffer[10] = SSD1331_CMD_SETMASTER; // 0xAD

    buffer[11] = 0x8E;

    buffer[12] = SSD1331_CMD_POWERMODE; // 0xB0

    buffer[13] = 0x0B;

    buffer[14] = SSD1331_CMD_PRECHARGE; // 0xB1

    buffer[15] = 0x31;

    buffer[16] = SSD1331_CMD_CLOCKDIV; // 0xB3

    buffer[17] = 0xF0; // 7:4 = Oscillator Frequency, 3:0 = CLK Div Ratio (A[3:0]+1 = 1..16)

    buffer[18] = SSD1331_CMD_PRECHARGEA; // 0x8A

    buffer[19] = 0x64;

    buffer[20] = SSD1331_CMD_PRECHARGEB; // 0x8B

    buffer[21] = 0x78;

    buffer[22] = SSD1331_CMD_PRECHARGEA; // 0x8C

    buffer[23] = 0x64;

    buffer[24] = SSD1331_CMD_PRECHARGELEVEL; // 0xBB

    buffer[25] = 0x3A;

    buffer[26] = SSD1331_CMD_VCOMH; // 0xBE

    buffer[27] = 0x3E;

    buffer[28] = SSD1331_CMD_MASTERCURRENT; // 0x87

    buffer[29] = 0x06;

    buffer[30] = SSD1331_CMD_CONTRASTA; // 0x81

    buffer[31] = 0x91;

    buffer[32] = SSD1331_CMD_CONTRASTB; // 0x82

    buffer[33] = 0x50;

    buffer[34] = SSD1331_CMD_CONTRASTC; // 0x83

    buffer[35] = 0x7D;

    buffer[36] = SSD1331_CMD_DISPLAYON; //--turn on oled panel

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 37);

}

void SSD1331_GoTo(int x, int y) {

    unsigned char buffer[6];

    if ((x >= SSD1331_LCDWIDTH) || (y >= SSD1331_LCDHEIGHT)) return;

    // set x and y coordinate

    buffer[0] = (SSD1331_CMD_SETCOLUMN);

    buffer[1] = (x); // Start x address

    buffer[2] = (SSD1331_LCDWIDTH - 1); // End x address

    buffer[3] = (SSD1331_CMD_SETROW);

    buffer[4] = (y); // Start y address

    buffer[5] = (SSD1331_LCDHEIGHT - 1); // End y address

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 6);

}

void SSD1331_Reset() {

}

void SSD1331_Command(unsigned char cmd) {

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(&cmd, 1);

}

void SSD1331_Data(unsigned char data) {

    LATBbits.LATB5 = 1; // D/C high (data)

    SPI2_Write(&data, 1);

}

void SSD1331_Draw_Pixel(int x, int y, unsigned int color) {

    unsigned char buffer[2];

    buffer[0] = color >> 8;

    buffer[1] = color;

    if ((x < 0) || (x >= GFX_width()) || (y < 0) || (y >= GFX_height())) return;

    // check rotation, move pixel around if necessary

    switch (GFX_getRotation()) {

        case 1:

            GFX_Swap(&x, &y);

            x = SSD1331_LCDWIDTH - x - 1;

            break;

        case 2:

            x = SSD1331_LCDWIDTH - x - 1;

            y = SSD1331_LCDHEIGHT - y - 1;

            break;

        case 3:

            GFX_Swap(&x, &y);

            y = SSD1331_LCDHEIGHT - y - 1;

            break;

    }

    SSD1331_GoTo(x, y);

    // setup for data

    LATBbits.LATB5 = 1; // D/C high (data)

    SPI2_Write(buffer, 2);

}

void SSD1331_Draw_Line(int x0, int y0, int x1, int y1, unsigned int color) {

    unsigned char buffer[8];

    // check rotation, move pixel around if necessary

    switch (GFX_getRotation()) {

        case 1:

            GFX_Swap(&x0, &y0);

            GFX_Swap(&x1, &y1);

            x0 = SSD1331_LCDWIDTH - x0 - 1;

            x1 = SSD1331_LCDWIDTH - x1 - 1;

            break;

        case 2:

            x0 = SSD1331_LCDWIDTH - x0 - 1;

            y0 = SSD1331_LCDHEIGHT - y0 - 1;

            x1 = SSD1331_LCDWIDTH - x1 - 1;

            y1 = SSD1331_LCDHEIGHT - y1 - 1;

            break;

        case 3:

            GFX_Swap(&x0, &y0);

            GFX_Swap(&x1, &y1);

            y0 = SSD1331_LCDHEIGHT - y0 - 1;

            y1 = SSD1331_LCDHEIGHT - y1 - 1;

            break;

    }

    // Boundary check

    if ((y0 >= SSD1331_LCDHEIGHT) && (y1 >= SSD1331_LCDHEIGHT))

        return;

    if ((x0 >= SSD1331_LCDWIDTH) && (x1 >= SSD1331_LCDWIDTH))

        return;

    if (x0 >= SSD1331_LCDWIDTH)

        x0 = SSD1331_LCDWIDTH - 1;

    if (y0 >= SSD1331_LCDHEIGHT)

        y0 = SSD1331_LCDHEIGHT - 1;

    if (x1 >= SSD1331_LCDWIDTH)

        x1 = SSD1331_LCDWIDTH - 1;

    if (y1 >= SSD1331_LCDHEIGHT)

        y1 = SSD1331_LCDHEIGHT - 1;

    if (x0 < 0)

        x0 = 0;

    if (y0 < 0)

        y0 = 0;

    if (x1 < 0)

        x1 = 0;

    if (y1 < 0)

        y1 = 0;

    buffer[0] = SSD1331_CMD_DRAWLINE;

    buffer[1] = x0;

    buffer[2] = y0;

    buffer[3] = x1;

    buffer[4] = y1;

    buffer[5] = (color >> 11) << 1;

    buffer[6] = (color >> 5) & 0x3F;

    buffer[7] = (color << 1) & 0x3F;

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 8);

}

void SSD1331_Draw_Rect(int tx0, int ty0, int tx1, int ty1, unsigned int color) {

    unsigned char buffer[13];

    int x0,y0,x1,y1;

    // check rotation, move pixel around if necessary

    switch (GFX_getRotation()) {

        case 0:

            x0 = tx0;

            y0 = ty0;

            x1 = tx1;

            y1 = ty1;

            break;

        case 1:

            x0 = SSD1331_LCDWIDTH - ty1 - 1;

            y0 = tx0;

            x1 = SSD1331_LCDWIDTH - ty0 - 1;

            y1 = tx1;

            break;

        case 2:

            x0 = SSD1331_LCDWIDTH - tx1 - 1;

            y0 = SSD1331_LCDHEIGHT - ty1 - 1;

            x1 = SSD1331_LCDWIDTH - tx0 - 1;

            y1 = SSD1331_LCDHEIGHT - ty0 - 1;

            break;

        case 3:

            x0 = ty0;

            y0 = SSD1331_LCDHEIGHT - tx1 - 1;

            x1 = ty1;

            y1 = SSD1331_LCDHEIGHT - tx0 - 1;

            break;

    }

    // Boundary check

    if ((y0 >= SSD1331_LCDHEIGHT) && (y1 >= SSD1331_LCDHEIGHT))

        return;

    if ((x0 >= SSD1331_LCDWIDTH) && (x1 >= SSD1331_LCDWIDTH))

        return;

    if (x0 >= SSD1331_LCDWIDTH)

        x0 = SSD1331_LCDWIDTH - 1;

    if (y0 >= SSD1331_LCDHEIGHT)

        y0 = SSD1331_LCDHEIGHT - 1;

    if (x1 >= SSD1331_LCDWIDTH)

        x1 = SSD1331_LCDWIDTH - 1;

    if (y1 >= SSD1331_LCDHEIGHT)

        y1 = SSD1331_LCDHEIGHT - 1;

    if (x0 < 0)

        x0 = 0;

    if (y0 < 0)

        y0 = 0;

    if (x1 < 0)

        x1 = 0;

    if (y1 < 0)

        y1 = 0;

    buffer[0] = SSD1331_CMD_FILL;

    buffer[1] = 0;

    buffer[2] = SSD1331_CMD_DRAWRECT;

    buffer[3] = x0;

    buffer[4] = y0;

    buffer[5] = x1;

    buffer[6] = y1;

    buffer[7] = (color >> 11) << 1;

    buffer[8] = (color >> 5) & 0x3F;

    buffer[9] = (color << 1) & 0x3F;

    buffer[10] = 0;

    buffer[11] = 0;

    buffer[12] = 0;

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 13);

}

void SSD1331_Fill_Rect(int tx0, int ty0, int tx1, int ty1, unsigned int color) {

    unsigned char buffer[13];

    int x0,y0,x1,y1;

    // check rotation, move pixel around if necessary

    switch (GFX_getRotation()) {

        case 0:

            x0 = tx0;

            y0 = ty0;

            x1 = tx1;

            y1 = ty1;

            break;

        case 1:

            x0 = SSD1331_LCDWIDTH - ty1 - 1;

            y0 = tx0;

            x1 = SSD1331_LCDWIDTH - ty0 - 1;

            y1 = tx1;

            break;

        case 2:

            x0 = SSD1331_LCDWIDTH - tx1 - 1;

            y0 = SSD1331_LCDHEIGHT - ty1 - 1;

            x1 = SSD1331_LCDWIDTH - tx0 - 1;

            y1 = SSD1331_LCDHEIGHT - ty0 - 1;

            break;

        case 3:

            x0 = ty0;

            y0 = SSD1331_LCDHEIGHT - tx1 - 1;

            x1 = ty1;

            y1 = SSD1331_LCDHEIGHT - tx0 - 1;

            break;

    }

    // Boundary check

    if ((y0 >= SSD1331_LCDHEIGHT) && (y1 >= SSD1331_LCDHEIGHT))

        return;

    if ((x0 >= SSD1331_LCDWIDTH) && (x1 >= SSD1331_LCDWIDTH))

        return;

    if (x0 >= SSD1331_LCDWIDTH)

        x0 = SSD1331_LCDWIDTH - 1;

    if (y0 >= SSD1331_LCDHEIGHT)

        y0 = SSD1331_LCDHEIGHT - 1;

    if (x1 >= SSD1331_LCDWIDTH)

        x1 = SSD1331_LCDWIDTH - 1;

    if (y1 >= SSD1331_LCDHEIGHT)

        y1 = SSD1331_LCDHEIGHT - 1;

    if (x0 < 0)

        x0 = 0;

    if (y0 < 0)

        y0 = 0;

    if (x1 < 0)

        x1 = 0;

    if (y1 < 0)

        y1 = 0;

    buffer[0] = SSD1331_CMD_FILL;

    buffer[1] = 1;

    buffer[2] = SSD1331_CMD_DRAWRECT;

    buffer[3] = x0;

    buffer[4] = y0;

    buffer[5] = x1;

    buffer[6] = y1;

    buffer[7] = (color >> 11) << 1;

    buffer[8] = (color >> 5) & 0x3F;

    buffer[9] = (color << 1) & 0x3F;

    buffer[10] = (color >> 11) << 1;

    buffer[11] = (color >> 5) & 0x3F;

    buffer[12] = (color << 1) & 0x3F;

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 13);

    Delay1KTCYx(4);

}

void SSD1331_Clear_Display() {

    unsigned char buffer[5];

    buffer[0] = SSD1331_CMD_CLEARWINDOW;

    buffer[1] = 0;

    buffer[2] = 0;

    buffer[3] = SSD1331_LCDWIDTH-1;

    buffer[4] = SSD1331_LCDHEIGHT-1;

    LATBbits.LATB5 = 0; // D/C low (cmd)

    SPI2_Write(buffer, 5);

    Delay1KTCYx(4);

}

unsigned int SSD1331_Color565(unsigned char r, unsigned char g, unsigned char b) {

    unsigned int c;

    c = r >> 3;

    c <<= 6;

    c |= g >> 2;

    c <<= 5;

    c |= b >> 3;

    return c;

}

void SSD1331_Test_DrawLines(unsigned int color) {

    int x, y;

    GFX_clearScreen();

    for (x = 0; x < GFX_width() - 1; x += 6) {

        GFX_drawLine(0, 0, x, GFX_height() - 1, color);

    }

    for (y = 0; y < GFX_height() - 1; y += 6) {

        GFX_drawLine(0, 0, GFX_width() - 1, y, color);

    }

    GFX_clearScreen();

    for (x = 0; x < GFX_width() - 1; x += 6) {

        GFX_drawLine(GFX_width() - 1, 0, x, GFX_height() - 1, color);

    }

    for (y = 0; y < GFX_height() - 1; y += 6) {

        GFX_drawLine(GFX_width() - 1, 0, 0, y, color);

    }

    GFX_clearScreen();

    for (x = 0; x < GFX_width() - 1; x += 6) {

        GFX_drawLine(0, GFX_height() - 1, x, 0, color);

    }

    for (y = 0; y < GFX_height() - 1; y += 6) {

        GFX_drawLine(0, GFX_height() - 1, GFX_width() - 1, y, color);

    }

    GFX_clearScreen();

    for (x = 0; x < GFX_width() - 1; x += 6) {

        GFX_drawLine(GFX_width() - 1, GFX_height() - 1, x, 0, color);

    }

    for (y = 0; y < GFX_height() - 1; y += 6) {

        GFX_drawLine(GFX_width() - 1, GFX_height() - 1, 0, y, color);

    }

}

void SSD1331_Test_DrawRect(unsigned int color) {

    int x;

    GFX_clearScreen();

    if (GFX_height() < GFX_width()) {

        for (x = 0; x < GFX_height() - 1; x += 6) {

            GFX_drawRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color);

        }

    } else {

        for (x = 0; x < GFX_width() - 1; x += 6) {

            GFX_drawRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color);

        }

    }

}

void SSD1331_Test_FillRect(unsigned int color1, unsigned int color2) {

    int x;

    GFX_clearScreen();

    if (GFX_height() < GFX_width()) {

        for (x = GFX_height() - 1; x > 6; x -= 6) {

            GFX_fillRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color1);

            GFX_drawRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color2);

        }

    } else {

        for (x = GFX_width() - 1; x > 6; x -= 6) {

            GFX_fillRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color1);

            GFX_drawRect((GFX_width() - 1) / 2 - x / 2, (GFX_height() - 1) / 2 - x / 2, x, x, color2);

        }

    }

}

void SSD1331_Test_DrawCircle(unsigned int radius, unsigned int color) {

    int x, y;

    for (x = 0; x < GFX_width() - 1 + radius; x += radius * 2) {

        for (y = 0; y < GFX_height() - 1 + radius; y += radius * 2) {

            GFX_drawCircle(x, y, radius, color);

        }

    }

}

void SSD1331_Test_FillCircle(unsigned int radius, unsigned int color) {

    unsigned char x, y;

    for (x = radius; x < GFX_width() - 1; x += radius * 2) {

        for (y = radius; y < GFX_height() - 1; y += radius * 2) {

            GFX_fillCircle(x, y, radius, color);

        }

    }

}

void SSD1331_Test_DrawTria(void) {

    int color = 0xF800;

    int t;

    int w = GFX_width() / 2;

    int x = GFX_height();

    int y = 0;

    int z = GFX_width();

    GFX_clearScreen();

    for (t = 0; t <= 15; t += 1) {

        GFX_drawTriangle(w, y, y, x, z, x, color);

        x -= 4;

        y += 4;

        z -= 4;

        color += 100;

    }

}

void SSD1331_Test_DrawRoundRect(void) {

    int color = 100;

    int i, t, x, y, w, h;

    GFX_clearScreen();

    for (t = 0; t <= 4; t += 1) {

        x = 0;

        y = 0;

        w = GFX_width();

        h = GFX_height();

        for (i = 0; i <= 24; i += 1) {

            GFX_drawRoundRect(x, y, w, h, 5, color);

            x += 2;

            y += 3;

            w -= 4;

            h -= 6;

            color += 1100;

        }

        color += 100;

    }

}

void SSD1331_Test_MediaButtons(void) {

    // play

    GFX_clearScreen();

    GFX_fillRoundRect(25, 10, 78, 60, 8, SSD1331_WHITE);

    GFX_fillTriangle(42, 20, 42, 60, 90, 40, SSD1331_RED);

    Delay10KTCYx(100);

    // pause

    GFX_fillRoundRect(25, 90, 78, 60, 8, SSD1331_WHITE);

    GFX_fillRoundRect(39, 98, 20, 45, 5, SSD1331_GREEN);

    GFX_fillRoundRect(69, 98, 20, 45, 5, SSD1331_GREEN);

    Delay10KTCYx(100);

    // play color

    GFX_fillTriangle(42, 20, 42, 60, 90, 40, SSD1331_BLUE);

    Delay10KTCYx(100);

    // pause color

    GFX_fillRoundRect(39, 98, 20, 45, 5, SSD1331_RED);

    GFX_fillRoundRect(69, 98, 20, 45, 5, SSD1331_RED);

    // play color

    GFX_fillTriangle(42, 20, 42, 60, 90, 40, SSD1331_GREEN);

}

void SSD1331_Test_Pattern(void) {

    unsigned char buffer[2];

    unsigned int i, j;

    SSD1331_GoTo(0, 0);

    for (i = 0; i < 64; i++) {

        for (j = 0; j < 96; j++) {

            if (i > 55) {

                buffer[0] = (SSD1331_WHITE >> 8);

                buffer[1] = (SSD1331_WHITE);

            } else if (i > 47) {

                buffer[0] = (SSD1331_BLUE >> 8);

                buffer[1] = (SSD1331_BLUE);

            } else if (i > 39) {

                buffer[0] = (SSD1331_GREEN >> 8);

                buffer[1] = (SSD1331_GREEN);

            } else if (i > 31) {

                buffer[0] = (SSD1331_CYAN >> 8);

                buffer[1] = (SSD1331_CYAN);

            } else if (i > 23) {

                buffer[0] = (SSD1331_RED >> 8);

                buffer[1] = (SSD1331_RED);

            } else if (i > 15) {

                buffer[0] = (SSD1331_MAGENTA >> 8);

                buffer[1] = (SSD1331_MAGENTA);

            } else if (i > 7) {

                buffer[0] = (SSD1331_YELLOW >> 8);

                buffer[1] = (SSD1331_YELLOW);

            } else {

                buffer[0] = (SSD1331_BLACK >> 8);

                buffer[1] = (SSD1331_BLACK);

            }

            LATBbits.LATB5 = 1; // D/C high (data)

            SPI2_Write(buffer, 2);

        }

    }

}