попытка перенести работу с прерываниями в hal. зависаем где-то, не доходя до trap_handler(), хотя по map файлу все логично

cores/arduino/board.cpp

@@ -1,11 +1,15 @@
 #include "board.h"
 #include "mik32_hal_pcc.h"
+#include "mik32_hal_irq.h"
 #include "Arduino.h"
 
 // --------------------- init --------------------- // 
 // called before setup()
 void pre_init(void)
 {
+    // set irq vector to ram region
+    write_csr(mtvec, 0x020000c0);
+
     HAL_Init();
 
     // gpio clock
@@ -23,6 +27,8 @@ void post_init(void)
 {
     // enable global interrupts by default
     interrupts();
+
+    ((GPIO_0)->SET = (GPIO_PIN_0));
 }
 
 // --------------------- other --------------------- // 

cores/arduino/mik32/shared/ldscripts/spifi_cpp.ld

@@ -21,8 +21,8 @@ SECTIONS {
         *crt0.S.o(.text .text.*)
         *(.text.smallsysteminit)
         *(.text.SmallSystemInit)
-        . = ORIGIN(rom) + 0xC0;
+        /*. = ORIGIN(rom) + 0xC0;*/
-        KEEP(*crt0.S.o(.trap_text))
+        /*KEEP(*crt0.S.o(.trap_text))*/
 
         *(.text)
         *(.text.*)
@@ -50,16 +50,17 @@ SECTIONS {
     AT( __TEXT_END__ ) {
         PROVIDE(__DATA_START__ = .);
         _gp = .;
+        . = ORIGIN(ram) + 0xC0;
+        KEEP(*crt0.S.o(.trap_text))
         *(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata*)
         *(.sdata .sdata.* .sdata* .sdata*.* .gnu.linkonce.s.*)
         *(.data .data.*)
-        *(.ramfunc) 
         . = ALIGN(CL_SIZE);
+        PROVIDE(__DATA_END__ = .);
     } >ram
     
     __DATA_IMAGE_START__ = LOADADDR(.data);
     __DATA_IMAGE_END__ = LOADADDR(.data) + SIZEOF(.data);
-    ASSERT(__DATA_IMAGE_END__ < ORIGIN(rom) + LENGTH(rom), "Data image overflows rom section")
 
     /* thread-local data segment */
     .tdata : {
@@ -85,10 +86,26 @@ SECTIONS {
 
     .bss : {
         *(.bss .bss.*)
+        *(COMMON)
         . = ALIGN(CL_SIZE);
         PROVIDE(__BSS_END__ = .);
     } >ram
 
+    /* Code intended to be copied to REGION_RAM before execution */
+    .ram_text : 
+    AT( ALIGN(__DATA_IMAGE_END__, CL_SIZE) ) {
+        PROVIDE(__RAM_TEXT_START__ = .);
+        *(.ram_text)
+        . = ALIGN(CL_SIZE);
+        PROVIDE(__RAM_TEXT_END__ = .);
+    } > ram
+
+    __RAM_TEXT_IMAGE_START__ = LOADADDR(.ram_text);
+    __RAM_TEXT_IMAGE_END__ = LOADADDR(.ram_text) + SIZEOF(.ram_text);
+    ASSERT(__RAM_TEXT_IMAGE_END__ < ORIGIN(rom) + LENGTH(rom), "rom segment overflows")
+
+    ASSERT(__RAM_TEXT_END__ < ORIGIN(ram) + LENGTH(ram) - STACK_SIZE - HEAP_SIZE, "REGION_RAM section overflows")
+
     .heap : {
         PROVIDE(__heap_start = .);
         . += HEAP_SIZE;

cores/arduino/mik32/shared/runtime/crt0.S

@@ -62,6 +62,11 @@ memset_2:
 
 _start:
     
+    li t0, 128000
+    start_loop_delay:
+    nop
+    addi t0, t0, -1
+    bnez t0, start_loop_delay
     # Init stack and global pointer
     #
     la_abs  sp, __C_STACK_TOP__
@@ -74,20 +79,19 @@ _start:
     la_abs  a3, __DATA_START__
     memcpy  a1, a2, a3, t0
 
+    # Init ramfunc
+    #
+    la_abs  a1, __RAM_TEXT_IMAGE_START__
+    la_abs  a2, __RAM_TEXT_IMAGE_END__
+    la_abs  a3, __RAM_TEXT_START__
+    memcpy  a1, a2, a3, t0
+    
     # Clear bss
     #
     la_abs  a1, __BSS_START__
     la_abs  a2, __BSS_END__
     memset a1, a2, zero
     
-    #ifdef MIK32V0
-    # Enable pad_config clocking
-    #
-    li t0, (1 << 3)
-    li t1, 0x50014
-    sw t0, (t1)
-    #endif
-    
     jalr_abs ra, SmallSystemInit
     jalr_abs ra, SystemInit
 	

cores/arduino/trap_handler.c

@@ -14,13 +14,13 @@ void __attribute__((weak)) wire_handler_wrapper(void)
 extern void softSerial_handler_wrapper(void);
 
 // ---------------------------------------------- //
-void trap_handler(void)
+void __attribute__((noinline, section(".ram_text"))) trap_handler(void)
 {
-    ((GPIO_0)->SET = (GPIO_PIN_8));
+    ((GPIO_0)->CLEAR = (GPIO_PIN_0));
     // gpio interrupt
     if (EPIC_CHECK_GPIO_IRQ())
-        // gpio_interrupts_handler();
+        gpio_interrupts_handler();
-        softSerial_handler_wrapper();
+        // softSerial_handler_wrapper();
 
     // tone timer interrupt
     if (EPIC_CHECK_TIMER16_1())
@@ -40,5 +40,5 @@ void trap_handler(void)
 
     // reset all interrupts
     HAL_EPIC_Clear(0xFFFFFFFF);
-    ((GPIO_0)->CLEAR = (GPIO_PIN_8));
+    ((GPIO_0)->SET = (GPIO_PIN_0));
 }

libraries/SoftwareSerial/src/SoftwareSerial.h

@@ -74,7 +74,7 @@ private:
   static uint32_t subtract_cap(uint32_t num, uint16_t sub);
 
   // private static method for timing
-  static void tunedDelay(uint32_t delayTicks) __attribute__((noinline, section(".ramfunc")));
+  static void tunedDelay(uint32_t delayTicks) __attribute__((noinline, section(".ram_text")));
 
 public:
   // public methods
@@ -94,7 +94,7 @@ public:
   }
   int peek();
 
-  virtual size_t write(uint8_t byte) __attribute__((noinline, section(".ramfunc")));
+  virtual size_t write(uint8_t byte) __attribute__((noinline, section(".ram_text")));
   virtual int read();
   virtual int available();
   virtual void flush();

platform.txt

@@ -18,8 +18,7 @@ compiler.MIK32_Amur.extra_include= "-I{build.core.path}/avr/" "-I{build.core.pat
 compiler.define="-DMCU_{build.mcu}" "-DF_CPU={build.f_cpu}" "-DARDUINO={runtime.ide.version}" "-DARDUINO_{build.board}" "-DARDUINO_ARCH_{build.arch}" "-DMIK32V2" "-D__ELBEAR_ACE_UNO__" "-D__RISC_V__" "-D__ARDUINO_ARC__" "-D__CPU_ARC__"
 
 build.flags.optimize=-Os
-# build.ldscript=spifi_cpp.ld
+build.ldscript=spifi_cpp.ld
-build.ldscript=ram.ld
 
 # Compiler flags
 compiler.warning_flags=-Wunused -Wuninitialized