Issue in SPI while communicating between stm32f4 and arduino - stm32

Question

In my spi code without HAL libraries I am not able to send data rather than 0xFF if I am sending any data it is by default sending as 0xFF.Here is my code:
#include <stm32f4xx.h>
uint8_t i = 100;
int j = 0;
uint8_t data = 82;
void afio_config(void);
void spi_init(void);
int main(void)
{
afio_config();
spi_init();
NVIC_EnableIRQ(SPI2_IRQn);
while(1)
{
}
}
void afio_config()
{
RCC -> AHB1ENR |= (1<<1)|(1<<2);
RCC -> APB1ENR |= (1<<14);
GPIOB -> MODER |= (1<<21)|(1<<24);
GPIOC -> MODER |= (1<<7)|(1<<5);
GPIOB ->OTYPER &= ~((1<<12)&(1<<10));
GPIOC ->OTYPER &= ~((1<<2)&(1<<3));
GPIOB -> OSPEEDR |= (1<<24)|(1<<20);
GPIOC -> OSPEEDR |= (1<<4)|(1<<6);
GPIOB -> PUPDR |= (1<<25)|(1<<21);
GPIOC -> PUPDR |= (1<<4)|(1<<6);
GPIOC -> AFR[0] |= (1<<14)|(1<<12)|(1<<10)|(1<<8);
GPIOB -> AFR[1] |= (1<<10)|(1<<8);
}
void spi_init()
{
SPI2 ->CR1 |= (1<<4)|(1<<5);
SPI2 ->CR1 |= (1<<15)|(1<<14);
SPI2 ->CR1 |= (1<<9)|(1<<8);
SPI2 ->CR2 |= (1<<7);
SPI2 ->CR1 |= (1<<2);
SPI2 ->CR1 |= (1<<6);
GPIOB ->ODR &= ~(1<<12);
}
void SPI2_IRQHandler()
{
SPI2 ->DR = data;
}