avr: split code in multiple files and routines.

avr/modules/flash/send.asm

@@ -0,0 +1,62 @@
+; ***************************************************************************
+; copyright   : (C) 2023 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.   *
+; ***************************************************************************
+
+
+
+; ***************************************************************************
+; code
+
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; wait indefinately until ATTN line is high, send packet over wire, retry until successfull
+;
+; IN:
+; - x  : ptr to buffer to send
+; OUT:
+; - nothing
+; REGS: (R16, R17, R18, R21, R22, R24, R25, X)
+
+flashSendPacketUntilSuccess:
+    push xl
+      push xh
+        rcall COM2_SendPacketWithAttn ; (R16, R17, R21, R22, X)
+      pop xh
+    pop xl
+    brcc flashSendPacket_error
+    ret
+flashSendPacket_error:
+    rcall flashWaitForAttnHigh        ; (R16, R17, R18, R22, R24, R25, X)
+  rjmp flashSendPacketUntilSuccess
+
+
+
+; ---------------------------------------------------------------------------
+; wait indefinately for free ATTN line
+;
+; IN:
+; - nothing
+; OUT:
+; - nothing
+; REGS: (R16, R17, R18, R22, R24, R25, X)
+
+flashWaitForAttnHigh:
+    rcall com2WaitForAttnHigh             ; (r17, r22, X)
+    brcc flashWaitForAttnHigh_stillLow
+    ret
+flashWaitForAttnHigh_stillLow:
+    rcall flashWaitDependingOnUid         ; (R16, R18, R22, R24, R25)
+  rjmp flashWaitForAttnHigh
+
+
+
+