writing a buffer inNor flash

#include "socDefs.h"
#include "APB_Interrupt.h"
#include "APB_UART.h"
#include "platform.h"
#include "externals.h"
#include "APB_GPIO.h"


#define BR_57600_40MHZ  42
#define nbytes  0x2000

void SDRAM_write(unsigned int baseaddr ,unsigned int offset, unsigned short data);
unsigned SDRAM_Verify(unsigned int baseaddr, unsigned int offset);

void IRQ_Handler (void)
{
}

void Flash_write(unsigned int baseaddr ,unsigned int offset, unsigned short data)
{
    *((volatile unsigned int *)(baseaddr + offset)) = (unsigned short)data;
}

unsigned Flash_Verify(unsigned int baseaddr, unsigned int offset)
{
    unsigned short read_data;
    read_data= *((volatile unsigned int *)(baseaddr + offset)) ;
    return (read_data & 0xFFFF);
}

int main( void)
{
    unsigned read, read1, read2, read3, i, j;
    unsigned short data[4] = {0xA5A5, 0xAAAA, 0x5555,0x5a5a};
    uart_cfg(UART1_BASE_ADDR,BR_57600_40MHZ);
    unsigned char mesg1[] = "\n\r Write OK ";
    unsigned char mesg2[] = "\n\r write Error  ";
    unsigned char mesg3[] = "\n\r Buffer Erase ";
    unsigned char mesg4[] = "\n\r Buffer Not Erase ";

    /* Block erase command = 0x20 , then write = 0xD0 on block base adddress = 0x2000 */
    Flash_write(Flash_BASE_ADDR, 0x4000, 0x20);
    Flash_write(Flash_BASE_ADDR, 0x4000, 0xD0);
    read3 = Flash_Verify(Flash_BASE_ADDR ,0x4000);  /* check SR7 = 1 */
    if(read3 == 0x80)
        uart_puts(UART1_BASE_ADDR, (unsigned char *)&mesg3, sizeof(mesg3));
    else
        uart_puts(UART1_BASE_ADDR, (unsigned char *)&mesg4, sizeof(mesg4));

/* for Buffer write  Block address = (0x2000 * 4)  command = 0xE8 base address = 0x02000 */

    Flash_write(Flash_BASE_ADDR, 0x4000, 0xE8);  // command on block address
    read = Flash_Verify(Flash_BASE_ADDR ,0x4000);  // read status and check SR.7 = 1 (7th bit)or not
    Flash_write(Flash_BASE_ADDR, 0x4000, 4);   // set a counter 0x10 =16;
    for(i = 0, j = 0; i < 0x10; i = i + 4, j++)
    {
        Flash_write(Flash_BASE_ADDR, (0x4000 + i), data[j]);
    }
    Flash_write(Flash_BASE_ADDR,0x4000, 0xD0);  // Program resume for some time
    read1 = Flash_Verify(Flash_BASE_ADDR ,0x4000);  // check status of status buffer register bit-7 == 1 ???
    if(read1 == 0x80)
        uart_puts(UART1_BASE_ADDR, (unsigned char *)&mesg1, sizeof(mesg1));
    else
        uart_puts(UART1_BASE_ADDR, (unsigned char *)&mesg2, sizeof(mesg2));
    /* reading data from buffer */
    Flash_write(Flash_BASE_ADDR, 0x4000, 0xFF);
    for(i = 0, j = 0; i < 0x10; i = i + 4, j++)
    {
        read2 = Flash_Verify(Flash_BASE_ADDR , (0x4000 + i) );
    }