From 75e593edf10291b946f9ec9da21b10e97d7bccbf Mon Sep 17 00:00:00 2001
From: klassents <klassen@elron.tech>
Date: Fri, 20 Dec 2024 14:40:15 +0700
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---
 cores/arduino/trap_handler.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/cores/arduino/trap_handler.c b/cores/arduino/trap_handler.c
index b491eae..f302625 100644
--- a/cores/arduino/trap_handler.c
+++ b/cores/arduino/trap_handler.c
@@ -1,5 +1,5 @@
-#include "mik32_hal_irq.h" 
-#include "wiring_LL.h" 
+#include "mik32_hal_irq.h"
+#include "wiring_LL.h"
 
 // isr functions
 extern void serial_interrupt_handler(uint8_t uartNumInt);
@@ -11,12 +11,37 @@ void __attribute__((weak)) wire_interrupt_handler(void)
 }
 void __attribute__((weak)) servo_interrupt_handler(void)
 {
-    // dummy function for case when wire library is not in use
+    // dummy function for case when servo library is not in use
+}
+
+void __attribute__((weak)) ISR(void)
+{
+    /* 
+    A dummy function for the case when additional interrupts are not used in the project.
+    In the project, you need to create a function of the form:
+    extern "C" void ISR(void)
+    {
+        // timer16 is taken as an example
+        if (TIM16_GET_ARRM_INT_STATUS(htimer16_1_))
+        {
+            // necessary actions
+        }
+        // reset timer interrupt flags
+        TIM16_CLEAR_INT_MASK(htimer16_1_, 0xFFFFFFFF);
+    }
+    libraries required to use this example:
+    #include "mik32_hal_timer16.h"
+    #include "mik32_hal_irq.h"
+    #include "wiring_LL.h" 
+    */
 }
 
 // ---------------------------------------------- //
 void __attribute__((noinline, section(".ram_text"), optimize("O3"))) trap_handler (void)  
 {
+    // custom interrupt
+    ISR();
+
     // gpio interrupt
     if (EPIC_CHECK_GPIO_IRQ())
         gpio_interrupt_handler();
@@ -36,7 +61,7 @@ void __attribute__((noinline, section(".ram_text"), optimize("O3"))) trap_handle
     // uart1 interrupt
     if (EPIC_CHECK_UART_1())
         serial_interrupt_handler(1);
-        
+
     // i2c interrupt
     if (EPIC_CHECK_I2C_1())
         wire_interrupt_handler();