avr: adapted boot firmware to latest changes (mainly switch to uart_bitbang).

avr/modules/flash/bootloader.asm

@@ -69,14 +69,33 @@ bootLoader:
   ldi r16, Low(RAMEND)
   out SPL, r16             ; init LSB stack pointer
 
+  ; start by setting all ports as inputs and enable internal pull-up resistors
+  ldi r16, 0xff
+  clr r17
+.ifdef PORTA
+  out DDRA, r17  ; all input
+  out PORTA, r16 ; enable pull-up on all
+.endif
+
+.ifdef PORTB
+  out DDRB, r17  ; all input
+  out PORTB, r16 ; enable pull-up on all
+.endif
+
+.ifdef PORTC
+  out DDRC, r17  ; all input
+  out PORTC, r16 ; enable pull-up on all
+.endif
+
+  
 ;  rcall watchdogOff        ; turn off watchdog timer (sometimes it stays on after reboot)
 
   ; setup pins and interrupts
-  cbi COM_TXD_DATA, COM_TXD_PIN      ; disable internal pullup for DATA
-  cbi COM_TXD_DDR, COM_TXD_PIN       ; set DATA port as input
+  cbi COM_DATA_DDR, COM_DATA_PIN          ; set TXD port as input
+  cbi COM_DATA_OUTPUT, COM_DATA_PIN       ; disable internal pullup for TXD
 
-  cbi COM_ATTN_OUTPUT, COM_ATTN_PIN  ; disable internal pullup for ATTN
   cbi COM_ATTN_DDR, COM_ATTN_PIN          ; set ATTN port as input
+  cbi COM_ATTN_OUTPUT, COM_ATTN_PIN       ; disable internal pullup for ATTN
 
   sbi LED_DDR, LED_PINNUM  ; out
   cbi LED_PORT, LED_PINNUM ; on

avr/modules/flash/recv.asm

@@ -122,6 +122,8 @@ flashWaitForSpecificMessage_received:       ; R16 contains message type
 ; REGS: R24 (R22)
 
 flashWaitForAttnState1ms:
+  cbi COM_ATTN_DDR, COM_ATTN_PIN          ; set ATTN port as input
+  cbi COM_ATTN_OUTPUT, COM_ATTN_PIN       ; disable internal pullup for ATTN
   ldi r24, 100
 flashWaitForAttnState1ms_loop:
     push r17