软件SPI可以驱动屏幕

STM32F103C8T6/Core/Src/stm32f1xx_it.c

@@ -22,6 +22,8 @@
 #include "stm32f1xx_it.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "multi_button.h"
+
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -41,7 +43,7 @@
 
 /* Private variables ---------------------------------------------------------*/
 /* USER CODE BEGIN PV */
-
+static uint8_t s_button_tick_counter = 0;
 /* USER CODE END PV */
 
 /* Private function prototypes -----------------------------------------------*/
@@ -55,7 +57,7 @@
 /* USER CODE END 0 */
 
 /* External variables --------------------------------------------------------*/
-
+extern DMA_HandleTypeDef hdma_spi2_tx;
 /* USER CODE BEGIN EV */
 
 /* USER CODE END EV */
@@ -188,6 +190,13 @@ void SysTick_Handler(void)
   HAL_IncTick();
   /* USER CODE BEGIN SysTick_IRQn 1 */
 
+  /* 每5ms调用一次button_ticks() */
+  s_button_tick_counter++;
+  if (s_button_tick_counter >= 5) {
+      s_button_tick_counter = 0;
+      button_ticks();
+  }
+
   /* USER CODE END SysTick_IRQn 1 */
 }
 
@@ -198,6 +207,20 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32f1xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles DMA1 channel5 global interrupt.
+  */
+void DMA1_Channel5_IRQHandler(void)
+{
+  /* USER CODE BEGIN DMA1_Channel5_IRQn 0 */
+
+  /* USER CODE END DMA1_Channel5_IRQn 0 */
+  HAL_DMA_IRQHandler(&hdma_spi2_tx);
+  /* USER CODE BEGIN DMA1_Channel5_IRQn 1 */
+
+  /* USER CODE END DMA1_Channel5_IRQn 1 */
+}
+
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */