эх как она работает...

Core/Src/stm32l4xx_it.c

@@ -41,6 +41,8 @@
 
 /* Private variables ---------------------------------------------------------*/
 /* USER CODE BEGIN PV */
+extern int32_t tx_index;
+extern uint8_t data_in[6];
 
 /* USER CODE END PV */
 
@@ -185,7 +187,7 @@ void SysTick_Handler(void)
   /* USER CODE BEGIN SysTick_IRQn 0 */
 
   /* USER CODE END SysTick_IRQn 0 */
-  HAL_IncTick();
+
   /* USER CODE BEGIN SysTick_IRQn 1 */
 
   /* USER CODE END SysTick_IRQn 1 */
@@ -198,6 +200,50 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32l4xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles TIM1 update interrupt and TIM16 global interrupt.
+  */
+void TIM1_UP_TIM16_IRQHandler(void)
+{
+  /* USER CODE BEGIN TIM1_UP_TIM16_IRQn 0 */
+
+  /* USER CODE END TIM1_UP_TIM16_IRQn 0 */
+
+  /* USER CODE BEGIN TIM1_UP_TIM16_IRQn 1 */
+
+  /* USER CODE END TIM1_UP_TIM16_IRQn 1 */
+}
+
+/**
+  * @brief This function handles SPI1 global interrupt.
+  */
+void SPI1_IRQHandler(void)
+{
+  /* USER CODE BEGIN SPI1_IRQn 0 */
+	  SPI1->DR = data_in[tx_index]; //Записываем новое значение в DR
+	  tx_index++; //увеличиваем счетчик переданных байт на единицу
+
+	  if(tx_index >= 6u)
+	    SPI1->CR2 &= ~(1<<SPI_CR2_TXEIE_Pos);
+  /* USER CODE END SPI1_IRQn 0 */
+  /* USER CODE BEGIN SPI1_IRQn 1 */
+
+  /* USER CODE END SPI1_IRQn 1 */
+}
+
+/**
+  * @brief This function handles USART1 global interrupt.
+  */
+void USART1_IRQHandler(void)
+{
+  /* USER CODE BEGIN USART1_IRQn 0 */
+
+  /* USER CODE END USART1_IRQn 0 */
+  /* USER CODE BEGIN USART1_IRQn 1 */
+
+  /* USER CODE END USART1_IRQn 1 */
+}
+
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */