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Unable to interface Ek 123 with Nokia 5110

Other Parts Discussed in Thread: TM4C123GH6PM


#include <stdint.h>
#include "inc/tm4c123gh6pm.h"

#define COMMAND (*((volatile unsigned long *)(0x42000000 +(0x43FC)*32 +0x06*4)))
#define RESET (*((volatile unsigned long *)(0x42000000 +(0x43FC)*32 +0x07*4)))
//#define RED_LED      (*((volatile uint32_t *)(0x42000000 + (0x400253FC-0x40000000)*32 + 1*4)))
//#define GREEN_LED    (*((volatile uint32_t *)(0x42000000 + (0x400253FC-0x40000000)*32 + 3*4)))
//#define PUSH_BUTTON  (*((volatile uint32_t *)(0x42000000 + (0x400253FC-0x40000000)*32 + 4*4)))






void delay()
    {    unsigned long i,j,h;
        int m=0;
        for(i=0;i<999;i++)
            {
            for( j=0;j<9999;j++)
                for( h=0;h<9999;h++)
                    m++;
            }

    }
void check_Break_Point()
    {    int k;
        //RESET=1;
        for( k=0;k<5;k++)
        {
            RESET=1;
            delay();
            delay();
            delay();
            RESET=0;
            delay();
            delay();
            delay();
        }


    }


void Port_A_Init()
 {

    SYSCTL_RCC_R = SYSCTL_RCC_XTAL_16MHZ | SYSCTL_RCC_OSCSRC_MAIN | SYSCTL_RCC_USESYSDIV | (4 << SYSCTL_RCC_SYSDIV_S);
    unsigned long dummy;
    dummy=SYSCTL_RCC_R;

    SYSCTL_RCGC2_R = 0x00000001;
    dummy= SYSCTL_RCGC2_R;
    //GPIO_PORTA_LOCK_R = 0x4C4F434B;
    GPIO_PORTA_CR_R = 0x1F;
    GPIO_PORTA_AMSEL_R = 0x00;
    GPIO_PORTA_PCTL_R = 0x00222200;
    GPIO_PORTA_DIR_R = 0x0FC;
    GPIO_PORTA_AFSEL_R = 0x3C;
    GPIO_PORTA_PUR_R = 0x00;
    GPIO_PORTA_DEN_R = 0xFF;
  }
void Port_F_Init()//not used
{
    // Configure HW to work with 16 MHz XTAL, PLL enabled, system clock of 40 MHz
    SYSCTL_RCC_R = SYSCTL_RCC_XTAL_16MHZ | SYSCTL_RCC_OSCSRC_MAIN | SYSCTL_RCC_USESYSDIV | (4 << SYSCTL_RCC_SYSDIV_S);

    // Set GPIO ports to use APB (not needed since default configuration -- for clarity)
    SYSCTL_GPIOHBCTL_R = 0;

    // Enable GPIO port F peripherals
    SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOF;

    // Configure LED and pushbutton pins
    GPIO_PORTF_DIR_R = 0x0F;  // bits 1 and 3 are outputs, other pins are inputs
    GPIO_PORTF_DR2R_R = 0x0F; // set drive strength to 2mA (not needed since default configuration -- for clarity)
    GPIO_PORTF_DEN_R = 0x1F;// enable LEDs and pushbuttons
    GPIO_PORTF_PUR_R = 0x10;  // enable internal pull-up for push button
}



void serial_Interface_Init()
    {
        SYSCTL_RCGCSSI_R=0x01;

        SYSCTL_RCGC1_R |= SYSCTL_RCGC1_SSI0;
        SSI0_CR1_R=0x00000000;
        SSI0_CR0_R=0x000004C7;
        SSI0_CPSR_R=0x00000002;
        SSI0_CC_R=0x00;

    }


void serial_Interface_Enable()
    {
        SSI0_CR1_R=0x02;
    }
void serial_Interface_Disable()
    {
        SSI0_CR1_R=0x00;
    }

void serial_Datapass(int command, int data)
    {
        COMMAND=command;
        SSI0_DR_R=data;

    }

void serial_Command()
    {



    serial_Datapass(0,0x21);
    serial_Datapass(0,0xB1);
    serial_Datapass(0,0x04);
    serial_Datapass(0,0x14);
    serial_Datapass(0,0x20);
    serial_Datapass(0,0x0C);
    serial_Datapass(0,0x0C);
    //RESET=1;
    }

int main()
 {
    Port_A_Init();
    serial_Interface_Init();
    serial_Interface_Enable();
    serial_Command();


        RESET =0;
        delay();
        delay();
        RESET=1;
        delay();
        delay();
        serial_Datapass(1,0x1F);


    while(1);

    return 0;
 }

i am unable to interface my launchpad 123 with nokia 5110.

i have considered my sysclk to be 40 Mhz and SSIclk to be 4Mhz

I have taken my CSDVSR value to be 0x02 and SCR 0x04

please help