avr: split code in multiple files and routines.

avr/modules/flash/flash_rsp.asm

@@ -0,0 +1,65 @@
+; ***************************************************************************
+; 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
+
+
+; ---------------------------------------------------------------------------
+; Create and send a FLASH RESPONSE packet
+;
+; IN:
+; - R16: response code to send
+; OUT:
+; - nothing
+; REGS: r16, X (R15, R17, R18, R19, R20, R21, R22)
+
+flashSendFlashResponse:
+  ; send flash ready message
+  ldi xl, LOW(flashSendBuffer)
+  ldi xh, HIGH(flashSendBuffer)
+  clr r16
+  rcall flashWriteFlashRsp         ; (R16, R17, R18, R19, R20)
+  rjmp flashSendPacketUntilSuccess ; (R15, R16, R17, R21, R22, X)
+
+
+
+
+; ---------------------------------------------------------------------------
+; Write a FLASH_RESPONSE packet.
+;
+; IN:
+; - R16: response code (0 if ok, error code otherwise)
+; - X  : buffer to write to
+; OUT:
+; - nothing
+; MODIFIED REGS: R16, R17 (R18, R19, R20)
+
+flashWriteFlashRsp:
+  clr r18
+  st X+, r18 ; dest address (unused)
+  ldi r18, 3 ; msg code+src address+one payload byte
+  st X+, r18 ; msg len
+  ldi r17, CPRO_CMD_FLASH_RSP
+  st X+, r17 ; msg code
+  clr r17
+  st X+, r17 ; src address (not used)
+  st X, r16  ; payload byte
+  sbiw xh:xl, 4
+  rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
+  sbiw xh:xl, 5
+  ret
+
+
+