void SPIEEPROM_Write(uint32_t address, uint32_t lenght, uint8_t *buffer)
{
    // Note!!!Every write operation demands a write enable!!!
    SPI2_CSlow();
    SPI_SendByte(USART2,SPIEEPROM_CMD_WREN);
    SPI2_CShigh();

    // start write
    SPI2_CSlow();
    // send write command
    SPI_SendByte(USART2,SPIEEPROM_CMD_WRITE);
    // send address
    SPI_SendByte(USART2,address>>8);
    SPI_SendByte(USART2,address&0x00FF);
    while(lenght--)
    {
        // send data to be written
         SPI_SendByte(USART2,*buffer++);
    }
    // stop write
    SPI2_CShigh();
}

void SPIEEPROM_WriteFloat(uint32_t addr, float *fval)
{
    uint8_t i;
    uint8_t farr[4];
    uint8_t *num;
    num=(uint8_t *)fval;
    for(i=0;i<4;i++)
    {
        num++;
        farr[i]=*num;
    }
    SPIEEPROM_Write(addr,4,farr);
}

void SPIEEPROM_WriteFloat(uint32_t addr, float fval)
{
    uint8_t farr[4];
    farr[0] = (uint8_t)fval & 0xFF;
    farr[1] = (uint8_t)fval >> 8;
    farr[2] = (uint8_t)fval >> 16;
    farr[2] = (uint8_t)fval >> 24;
    SPIEEPROM_Write(addr,4,farr);
}