Problem PIC18F und ST7567

Hallo Leute,
ich brauche eure Hilfe bei Grafik-Display mit ST7567-Controller.
Ich versuche seit Wochen Grafik-Display ein Pixel zu setzten.
Grüße,
Patrick Dreger

C-Code:
#include "mcc_generated_files/mcc.h"
#include "mcc_generated_files/spi1.h"

#define x_max 132
#define x_min 0
#define y_max 32
#define y_min 0
#define row_max 8
#define row_min 0
#define buffer_size 1024
#define ON 1
#define OFF 0
#define round 1
#define square 0
#define Set_Column_Address_Low 0x00
#define Set_Column_Address_High 0x10
#define Select_Internal_Resistor_Ratio 0x22
#define Select_Internal_Power_Supply_Mode 0x28
#define Set_LCD_Start_Line 0x40
#define Set_Electronic_Volume_Mode 0x81
#define ADC_Select_Normal 0xA0
#define ADC_Select_Reverse 0xA1
#define Set_LCD_Bias_Low 0xA2
#define Set_LCD_Bias_High 0xA3
#define Display_All_Points_Off 0xA4
#define Display_All_Points_On 0xA5
#define Display_Normal 0xA6
#define Display_Reverse 0xA7
#define Display_Off 0xAE
#define Display_On 0xAF
#define Set_Page_Address 0xB0
#define Set_Common_Output_Normal 0xC0
#define Set_Common_Output_Reverse 0xC8
#define Internal_Reset 0xE2
#define NOP_cmd 0xE3
#define End_cmd 0xEE
#define Set_Boost_Ratio_Low 0xF8
#define Set_Boost_Ratio_Medium 0xF9
#define Set_Boost_Ratio_High 0xFB
#define Test_Display 0xFF
#define CMD 0
#define DAT 1

uint8_t buffer[buffer_size];
uint8_t _lcd_init_data[15] = { 0xE2 ,
                                0x40 ,
                                0xA1 ,
                                0xC0 ,
                                0xA6 ,
                                0xA2 ,
                                0x2F ,
                                0xF8 ,
                                0x00 ,
                                0x23 ,
                                0x81 ,
                                0x1F ,
                                0xAC ,
                                0x00 ,
                                0xAF};

//uint8_t init_DOGM132[13] = 
{0xA2,0xA0,0xC0,0x22,0x81,0x1F,0xF8,0x00,0x2C,0x2E,0x2F,0xAF,0x00};
uint8_t x = 0x00;
uint8_t lowbyte , highbyte = 0x00;

void command(uint8_t dat,uint8_t type);
void glcd_init(void);
void glcd_clear(void);
void GLCD_set_pixel(uint8_t x_pos, uint8_t y_pos, uint8_t colour);

void main(void)
{
    // Initialize the device
    SYSTEM_Initialize();
    EUSART1_Initialize();
    SPI1_Initialize();
    SPI1_Open(SPI1_DEFAULT);

    glcd_init();

    GLCD_set_pixel(5,5,1);
    while (1)
    {

    }
    SPI1_Close();
}
void command(uint8_t dat,uint8_t type)
{

    if(type == 0)
    {
        A0_SetLow();
    }
    else
    {
        A0_SetHigh();
    }
    __delay_us(10);
    CS1_SetLow();
    EUSART1_Write(dat);
 SPI1_WriteByte(dat);
    __delay_us(10);
 CS1_SetHigh();
    return;
}
void glcd_init(void)
{
    uint8_t i = 0 ;
    RST_SetLow();
    __delay_us(100);
    CS1_SetLow();
    RST_SetHigh();

    for (i= 0; i<15;i++)
    {
        SPI1_WriteByte(_lcd_init_data[i]);
    }
    return;
}
void glcd_clear(void)
{
    uint8_t i = 0x00;
    uint8_t j = 0x00;

    for(i = row_min; i < row_max; i++)
    {
         command(i + 0xB0, CMD);
         command(0x10, CMD);
         command(0x04, CMD);

            for(j = x_min; j < x_max; j++)
            {
               command(0x00, DAT);
            }
    }
    return;
}
void GLCD_set_pixel(uint8_t x_pos, uint8_t y_pos, uint8_t colour)
{
    uint8_t value = 0x00;

    if(y_pos > y_max)
    {
        y_pos = y_max;
    }
    if(x_pos > x_max)
    {
        x_pos = x_max;
    }
    command(Set_Page_Address + y_pos , DAT);
    x = x_pos << 4; x = x >> 4; //HighNibble
    command(Set_Column_Address_High + x , DAT);
    x = x_pos >> 4; //LowNibble
    command(Set_Column_Address_Low + x , DAT);
    if(colour >= 1)
    {
        value = 1;
    }
    else
    {
        value = 0;
    }
    command(value, DAT);
    return;
}