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[avr-libc-dev] [bug #43011] Bug in struct definition of __reg_UCSR1C and

From: vac
Subject: [avr-libc-dev] [bug #43011] Bug in struct definition of __reg_UCSR1C and __reg_UCSR0C in iom128rfa1.h
Date: Mon, 18 Aug 2014 14:37:39 +0000
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                 Summary: Bug in struct definition of __reg_UCSR1C and
__reg_UCSR0C in iom128rfa1.h
                 Project: AVR C Runtime Library
            Submitted by: vac
            Submitted on: Mon 18 Aug 2014 04:37:38 PM CEST
                Category: Header
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Header files
                  Status: None
        Percent Complete: 0%
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: Any
           Fixed Release: None



There is a bug in iom128rfa1.h file.

Struct definition of __reg_UCSR1C got 10 bits instead of 8:

struct __reg_UCSR1C {
         unsigned int ucpol1 : 1;                /* Clock Polarity */
         unsigned int ucsz1 : 2;                 /* Character Size */
         unsigned int ucpha1 : 1;                /* Clock Phase */
         unsigned int udord1 : 1;                /* Data Order */
         unsigned int usbs1 : 1;                 /* Stop Bit Select */
         unsigned int upm1 : 2;          /* Parity Mode */
         unsigned int umsel1 : 2;                /* USART Mode Select */

There are two extra bits (ucpha1 and udord1) in definition of register which
are used only in MSPIM mode of USART.
Setting for example parity mode (upm1) in result is setting wrong bits: bit 6
and 7 is set instead of bit 4 and 5.

Same applies to __reg_UCSR0C struct.


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