avr: started work on com2w_router for S03.

avr/modules/com2w_router/isr.asm

@@ -0,0 +1,64 @@
+; ***************************************************************************
+; copyright   : (C) 2026 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+#ifndef AVR_MOD_COM2WROUTER_ISR_ASM
+#define AVR_MOD_COM2WROUTER_ISR_ASM
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+; ---------------------------------------------------------------------------
+; @routine COM2WR_Router_PinChangeISR @global @isr
+;
+; @clobbers none
+
+COM2WR_Router_PinChangeISR:
+  push r15
+    inr r15, SREG
+    push r16
+      push r17
+        push r18
+          inr r16, COM_CLK_INPUT
+          inr r17, COM_DATA_INPUT
+          lds r18, com2wAllCurrentPinMask
+          or r16, r18                              ; preset ports marked as sending with ones
+          lds r18, com2wAllLastClock
+          sts com2wAllLastClock, r16
+          eor r18, r16                             ; check for clock changes
+          breq COM2WR_Router_PinChangeISR_done
+          push r19
+            push xl
+              push xh
+                bigcall COM2WR_Ringbuffer_WriteWord ; (xl, xh, r18, r19)
+              pop xh
+            pop xl
+          pop r19
+COM2WR_Router_PinChangeISR_done:
+        pop r18
+      pop r17
+    pop r16  
+    outr SREG, r15
+  pop r15
+  reti
+; @end
+
+
+
+
+
+
+
+
+
+#endif ; AVR_MOD_COM2WROUTER_ISR_ASM
+