avr: reuse code (saves a few more bytes).

avr/modules/com2/packets.asm

@@ -34,8 +34,7 @@ com2ReceivePacketRaw:
   cpi r16, 0xff
   breq com2ReceivePacketRaw_acceptAddr
   ldi r16, COM2_ERROR_NOTFORME
-  clc                                    ; not for me
-  ret
+  rjmp com2ReceivePacketRaw_error        ; clc/ret
 com2ReceivePacketRaw_acceptAddr:
   st X+, r16                             ; store dest address, lock buffer
   ; read msg length
@@ -54,16 +53,14 @@ com2ReceivePacketRaw_loop:
     st X+, r16
     dec r17
   brne com2ReceivePacketRaw_loop
-  sec
-  ret
+  rjmp com2PacketsSecRet
 com2ReceivePacketRaw_ioError:
   ldi r16, COM2_ERROR_IOERROR
-  rjmp com2ReceivePacketRaw_error
+  rjmp com2PacketsClcRet
 com2ReceivePacketRaw_contentError:
   ldi r16, COM2_ERROR_DATAERROR
 com2ReceivePacketRaw_error:
-  clc
-  ret
+  rjmp com2PacketsClcRet
 
 
 
@@ -105,8 +102,7 @@ COM2_SendPacketWithAttn:
     ; packet successfully sent
     out SREG, r15
   pop r15
-  sec
-  ret
+  rjmp com2PacketsSecRet
 
 COM2_SendPacketWithAttn_ioError:
     ldi r16,COM2_ERROR_COLLISION
@@ -117,8 +113,7 @@ COM2_SendPacketWithAttn_lineBusyError:
 COM2_SendPacketWithAttn_retNc:
   pop r15
   out SREG, r15
-  clc
-  ret
+  rjmp com2PacketsClcRet
 
 
 
@@ -132,7 +127,7 @@ COM2_SendPacketWithAttn_retNc:
 ; REGS: r22
 
 com2WaitForOneBitLength:
-    Utils_WaitNanoSecs COM_BIT_LENGTH, 3+4, r22      ; wait for one bit duration (minus RCALL/RET)
+    Utils_WaitNanoSecs COM_BIT_LENGTH, 7, r22       ; wait for one bit duration (minus RCALL/RET)
     ret
 
 
@@ -151,14 +146,18 @@ com2SendPacketRaw:
 com2SendPacket_loop:
     ld r16, X+
     rcall com2SendByte                 ; send byte (R16, R21, R22)
-    brcc com2SendPacket_ioError
+    brcc com2PacketsClcRet
     dec r17
   brne com2SendPacket_loop
   sec
   ret
-com2SendPacket_ioError:
+
+
+com2PacketsClcRet:
   clc
   ret
 
-
+com2PacketsSecRet:
+  sec
+  ret