I am trying to interface TM12864H6CCGWA-1 via SPI on nucleo-L073RZ .I am unable to print anything on display. I have checked all connections , all pins are connected correctly but Its not working. Please help me.

[swald.18]

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32l0xx_hal.h"
 
/* USER CODE BEGIN Includes */
/*LCD RST */
# define LCD_RST1 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_SET);
# define LCD_RST0 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_RESET);
 
/*LCD CS */
# define LCD_CS1 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_SET);
# define LCD_CS0 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET);
 
/* LCD RS */
# define LCD_RS1 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_1, GPIO_PIN_SET);//A0
# define LCD_RS0 HAL_GPIO_WritePin(GPIOC, GPIO_PIN_1, GPIO_PIN_RESET);
 
 
/* LCD SCK */
# define LCD_SCK1 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);//SCK
# define LCD_SCK0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
 
/* LCD MOSI */
# define LCD_MOSI1 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_SET);//SDA
# define LCD_MOSI0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);
 
/* USER CODE END Includes */
 
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;
 
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
uint8_t aTxBuffer[2];
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
 
 
/**
  * @brief  The application entry point.
  *
  * @retval None
  */
void lcd_send_cmd(unsigned char cmd)
{
 aTxBuffer[0]= (cmd&0x0f)|0x04;
 aTxBuffer[1]= (cmd&0x0f);
 LCD_RS0;
 LCD_CS0;
 LCD_SCK0;
for(int i=0;i<8;i++){
   LCD_SCK0;
	 if( cmd & 0x0f){
		 LCD_MOSI1;}
	 else
		 {LCD_MOSI0;}
		 LCD_SCK1;
		 HAL_Delay(100);
		// LCD_SCK0;
		 cmd<<=1;
	 }
 HAL_SPI_Transmit(&hspi1,&cmd,2,100);
 while (HAL_SPI_GetState(&hspi1)!= HAL_SPI_STATE_READY);
 LCD_MOSI0;
 LCD_CS1;
}
 
void lcd_send_data(unsigned char data)
{
 aTxBuffer[0]= (data&0x0f)|0x04;
 aTxBuffer[1]= (data&0x0f);
	 LCD_RS1;
	 LCD_CS0;
	 LCD_SCK0;
for(int i=0;i<8;i++)
	{
     LCD_SCK0;
		 HAL_Delay(100);
	  if (data & 0x0f)
	{LCD_MOSI1;}
     else {LCD_MOSI0;}
	 LCD_SCK1;
		HAL_Delay(100);
 
		data<<=1;
	 }
	 HAL_SPI_Transmit(&hspi1,&data,2,100);
	 while (HAL_SPI_GetState(&hspi1)!= HAL_SPI_STATE_READY);
	  LCD_MOSI0;
     LCD_CS1;
 
}
 
void set_rr(char rr)	//0<=rr<=7
{
  LCD_RS0;
	lcd_send_data((0x20)|((rr)&(0x07)));
}
void set_ev(char ev)	//0<=ev<=63
{
	LCD_RS0;
	lcd_send_data(0x81);
	lcd_send_data(((0x3F)&(ev)));
}
void power_control(char dat)	//0<=dat<=7
//dat=1: Built-in Follower ON
//dat=2: Built-in Regulator ON
//dat=4: Built-in Booster ON
{
	LCD_RS0;
	dat=((dat)&(0x07));
	lcd_send_data(((0x28)|(dat)));
}
 
// update lcd
 
void copy_to_lcd(void)
{
    for (int page = 0; page < 8; page++) {
       lcd_send_cmd(0x00);        // set column low nibble 0
   lcd_send_cmd(0x10);        // set column hi  nibble 0
        lcd_send_cmd(0xB0|page);   // set page address  0
        LCD_RS1;
 
        for(int i=page*128; i<(page*128+128); i++) {
            lcd_send_data(aTxBuffer[i]);
        }
    }
}
void lcd_Init(void)
{
 // LCD_RS0;
	//LCD_CS1;
	LCD_RST0;
	HAL_Delay(100);
	LCD_RST1;
 
   lcd_send_cmd (0xE2);//Sw RESWT
	 HAL_Delay(100);
 
   lcd_send_cmd (0xA2);//LCD bias
	 HAL_Delay(100);
 
   lcd_send_cmd (0xAF);//display on
	 HAL_Delay(100);
 
   lcd_send_cmd (0xA0);//Segment direction
	 HAL_Delay(100);
 
   lcd_send_cmd (0xC8);//common direction
	 HAL_Delay(100);
 
   set_rr(0x04);//Regulation resistor select
	 HAL_Delay(100);
 
   set_ev(0x1F);;//EV select
	 HAL_Delay(100);
 
	 power_control(0x07);	//ALL Power Control ON
	 HAL_Delay(100);
 
 
   lcd_send_cmd (0x40);//Initial display line 40
	 HAL_Delay(100);
 
   lcd_send_cmd (0xB0);//set page address
	 HAL_Delay(100);
 
   lcd_send_cmd (0x10);//set colmn address MSB
	 HAL_Delay(100);
 
   lcd_send_cmd (0x00);//set column address LSB
	 HAL_Delay(100);
 
   lcd_send_cmd (0xAF);//display on
	 HAL_Delay(100);
	 lcd_send_cmd (0xA4);//normal display , all pixels on
	 HAL_Delay(100);
 
    copy_to_lcd();
 
}
 
 
void lcd_send_string (char *str)
 
{
    while (*str) lcd_send_data (*str++);
 
}
 
 
void lcd_set_pixel(int x, int y, int color)
{
        int page,col;
        int row_in_page;
 
        page = y / 8;
 
        /* Selecting Page */
       lcd_send_cmd(0xB0 | page);
 
        /* Selecting Column */
        col = ((x & 0xf0) >> 4) | 0x10;
        lcd_send_cmd(0x10|col);
        lcd_send_cmd(x & 0xf0);
 
        /* Pixel location */
        row_in_page = y % 8;
 
#ifdef CONFIG_LARGE_MEMORY
        if (color)
                gfx_buf[page][col] |= 1 << row_in_page;
        else
                gfx_buf[page][col] &= ~(1 << row_in_page);
 
        glcd_write_data(gfx_buf[page][col]);
#else
        if (color)
                lcd_send_data(1 << row_in_page);
#endif
 
}
/**
  * @brief  The application entry point.
  *
  * @retval None
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
// printf("Hello");
  HAL_Init();
 
  /* Configure the system clock */
  SystemClock_Config();
 
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SPI1_Init();
  LCD_RST0;
	HAL_Delay(100);
	LCD_RST1;
    lcd_Init();
	lcd_send_cmd(0xB0);
	lcd_send_cmd(0x00);
	lcd_send_data(0xFF);
	lcd_send_string("Its working");
	for (int i = 0; i < 128; i++)
               { for (int j = 0; j < 64; j++)
                        {lcd_set_pixel(i, j, 1);
	                      }
        return 0;}
 
}