Add IRQ Handler - toggle LED_GREEN

Core/Inc/cppmain.h

@@ -9,12 +9,12 @@
 #define INC_CPPMAIN_H
 
 
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-void cppmain(void);
+    void irq1();
+    void cppmain(void);
 
 #ifdef __cplusplus
 };
@@ -22,4 +22,3 @@ void cppmain(void);
 
 
 #endif /* INC_CPPMAIN_H */
-

Core/Src/cppmain.cc

@@ -16,6 +16,9 @@
 
 const double pi{ std::acos(-1) };
 
+// Serial Logging
+// --------------
+
 void log(const std::string &msg)
 {
     std::string out{ msg };
@@ -28,6 +31,10 @@ void log(std::string &&msg)
     log(msg);
 }
 
+
+// DAC
+// ---
+
 void set_dac_1(uint32_t val)
 {
     HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_L, val);
@@ -38,6 +45,34 @@ void set_dac_2(uint32_t val)
     HAL_DAC_SetValue(&hdac, DAC_CHANNEL_2, DAC_ALIGN_12B_L, val);
 }
 
+
+// LED
+// ---
+
+void led_green_toggle()
+{
+    HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);
+}
+
+void led_green_on()
+{
+    HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_SET);
+}
+
+void led_green_off()
+{
+    HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_RESET);
+}
+
+
+// MAIN
+// ----
+
+void irq1()
+{
+    led_green_toggle();
+}
+
 void cppmain(void)
 {
     HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
@@ -45,7 +80,7 @@ void cppmain(void)
     while (true) {
         unsigned char res = t * ((t >> 12 | t >> 8) & 63 & t >> 4);
         set_dac_1((res % 256) * 100);
-        for (int g = 0; g < 6000; g++) {}
+        for (int g = 0; g < 600000; g++) {}
         t++;
         t %= (std::numeric_limits<long>::max() - 1);
     }

Core/Src/main.c

@@ -25,7 +25,7 @@
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
-
+#include "cppmain.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -159,7 +159,14 @@ void SystemClock_Config(void)
 }
 
 /* USER CODE BEGIN 4 */
-
+void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
+{
+  if(GPIO_Pin == BUT_BLUE_Pin) {
+    irq1();
+  } else {
+    __NOP();
+  }
+}
 /* USER CODE END 4 */
 
 /**