/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"

/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);

int main(void)
{
    uint8_t aTxBuffer[] = "Rohalamin";

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* System interrupt init*/
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SPI1_Init();

  /* USER CODE BEGIN 2 */
    HAL_GPIO_WritePin( GPIOA , GPIO_PIN_4 , GPIO_PIN_SET );
  /* USER CODE END 2 */

  /* USER CODE BEGIN 3 */
  /* Infinite loop */
  while (1)
  {
        HAL_GPIO_WritePin( GPIOA , GPIO_PIN_4 , GPIO_PIN_RESET );
        HAL_SPI_Transmit_IT( &hspi1 , (uint8_t*)aTxBuffer , 10 );
        HAL_GPIO_WritePin( GPIOA , GPIO_PIN_4 , GPIO_PIN_SET );

  }
  /* USER CODE END 3 */

}

/** System Clock Configuration
*/
void SystemClock_Config(void)
{

  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);

  __SYSCFG_CLK_ENABLE();

}

/* SPI1 init function */
void MX_SPI1_Init(void)
{

    HAL_SPI_MspInit(&hspi1);

  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
  HAL_SPI_Init(&hspi1);

}

/** Configure pins as
        * Analog
        * Input
        * Output
        * EVENT_OUT
        * EXTI
*/
void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct;

  /* GPIO Ports Clock Enable */
  __GPIOF_CLK_ENABLE();
  __GPIOA_CLK_ENABLE();

  /*Configure GPIO pin : PA0 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_EVT_RISING;
  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /*Configure GPIO pin : PA4 */
  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI0_1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);

}

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"
#include "stm32f0xx.h"
#include "stm32f0xx_it.h"

/* External variables --------------------------------------------------------*/

extern SPI_HandleTypeDef hspi1;

uint8_t aTxBuffer[] = "R";

/******************************************************************************/
/*            Cortex-M4 Processor Interruption and Exception Handlers         */
/******************************************************************************/

/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
  HAL_IncTick();
  HAL_SYSTICK_IRQHandler();
}

/**
* @brief This function handles SPI1 global interrupt.
*/
void SPI1_IRQHandler(void)
{
  HAL_NVIC_ClearPendingIRQ(SPI1_IRQn);
  HAL_SPI_IRQHandler(&hspi1);
}

/**
* @brief This function handles EXTI Line 0 and Line 1 interrupts.
*/
void EXTI0_1_IRQHandler(void)
{
  HAL_NVIC_ClearPendingIRQ(EXTI0_1_IRQn);
  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
    HAL_SPI_Transmit_IT( &hspi1 , (uint8_t*)aTxBuffer , 2 );
}

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(hspi->Instance==SPI1)
  {
    /* Peripheral clock enable */
    __SPI1_CLK_ENABLE();

    /**SPI1 GPIO Configuration
    PA4     ------> SPI1_NSS
    PA5     ------> SPI1_SCK
    PA6     ------> SPI1_MISO
    PA7     ------> SPI1_MOSI
    */
    GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF0_SPI1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* Peripheral interrupt init*/
    HAL_NVIC_SetPriority(SPI1_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(SPI1_IRQn);
  }

}

void HAL_SPI_MspDeInit(SPI_HandleTypeDef* hspi)
{

  if(hspi->Instance==SPI1)
  {
    /* Peripheral clock disable */
    __SPI1_CLK_DISABLE();

    /**SPI1 GPIO Configuration
    PA4     ------> SPI1_NSS
    PA5     ------> SPI1_SCK
    PA6     ------> SPI1_MISO
    PA7     ------> SPI1_MOSI
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);

    /* Peripheral interrupt Deinit*/
    HAL_NVIC_DisableIRQ(SPI1_IRQn);
  }

}