Classic/Legacy CodeWarriorのトピックRe: size of byte

Classic/Legacy CodeWarriorのトピックRe: size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124015#M10 <HTML><HEAD></HEAD><BODY>The problem is a simple name collision one, it has nothing to do with the number of bits.<BR />After preprocessing, the compiler sees:<BR />..<BR />typedef union {<BR />byte Byte;<BR />struct {<BR />byte (0x0001) :1;<BR />byte (0x0002) :1;<BR />byte (0x0004) :1;<BR />..<BR />This is just not legal, whenever macros are used, checking the preprocessor is always a good idea.<BR /><BR />In order to resolve this name collision, you could:<BR />- use other names at one place (probably your macros, as macros are just more dangerous)<BR />- use enums instead of macros for the numerical values (enum {Bit0=1,Bit1=2..<BR />(this allows to keep the sources pretty much as they are)<BR />- not using the two headers together<BR /><BR /><BR />Daniel</BODY></HTML> Tue, 25 Jul 2006 02:25:39 GMT CompilerGuru 2006-07-25T02:25:39Z size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124011#M6 <HTML><HEAD></HEAD><BODY><DIV>I am attempting to install another persons files into my portion of the project.</DIV><DIV> </DIV><DIV>He has defined the following 2 sections of code.</DIV><DIV> </DIV><DIV>Section 1 compiles properly</DIV><DIV> </DIV><DIV>section 2 has a problem.</DIV><DIV> </DIV><DIV>I have included the #define statements also.</DIV><DIV> </DIV><DIV>What I think is happening is that the compiler has a problem fitting the high 8 bit define values into the 8 bit byte space since there is no problem with the lower 8 bits.</DIV><DIV> </DIV><DIV>Any ideas/comments?</DIV><DIV>Bud</DIV><DIV> </DIV><DIV>#defines</DIV><DIV>#define Bit0  (0x0001)<BR />#define Bit1  (0x0002)<BR />#define Bit2  (0x0004)<BR />#define Bit3  (0x0008)<BR />#define Bit4  (0x0010)<BR />#define Bit5  (0x0020)<BR />#define Bit6  (0x0040)<BR />#define Bit7  (0x0080)<BR />#define Bit8  (0x0100)<BR />#define Bit9  (0x0200)<BR />#define Bit10 (0x0400)<BR />#define Bit11 (0x0800)<BR />#define Bit12 (0x1000)<BR />#define Bit13 (0x2000)<BR />#define Bit14 (0x4000)<BR />#define Bit15 (0x8000)<BR /></DIV><DIV>section 1</DIV><DIV>/*** DBGCAL - Debug Comparator A Low Register; 0x00001811 ***/<BR />typedef union {<BR />  byte Byte;<BR />  struct {<BR />    byte Bit0        :1;                                       /* Debug Comparator A Bit 0 */<BR />    byte Bit1        :1;                                       /* Debug Comparator A Bit 1 */<BR />    byte Bit2        :1;                                       /* Debug Comparator A Bit 2 */<BR />    byte Bit3        :1;                                       /* Debug Comparator A Bit 3 */<BR />    byte Bit4        :1;                                       /* Debug Comparator A Bit 4 */<BR />    byte Bit5        :1;                                       /* Debug Comparator A Bit 5 */<BR />    byte Bit6        :1;                                       /* Debug Comparator A Bit 6 */<BR />    byte Bit7        :1;                                       /* Debug Comparator A Bit 7 */<BR />  } Bits;<BR />} DBGCALSTR;<BR /></DIV><DIV>section 2</DIV><DIV>/*** DBGCAH - Debug Comparator A High Register; 0x00001810 ***/<BR />typedef union {<BR />  byte Byte;<BR />  struct {<BR />    byte Bit8        :1;                                       /* Debug Comparator A Bit 8 */<BR />    byte Bit9        :1;                                       /* Debug Comparator A Bit 9 */<BR />    byte Bit10       :1;                                       /* Debug Comparator A Bit 10 */<BR />    byte Bit11       :1;                                       /* Debug Comparator A Bit 11 */<BR />    byte Bit12       :1;                                       /* Debug Comparator A Bit 12 */<BR />    byte Bit13       :1;                                       /* Debug Comparator A Bit 13 */<BR />    byte Bit14       :1;                                       /* Debug Comparator A Bit 14 */<BR />    byte Bit15       :1;                                       /* Debug Comparator A Bit 15 */<BR />  } Bits;<BR />} DBGCAHSTR;<BR /></DIV><DIV> </DIV><DIV>The error message is</DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3307  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3308  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3308  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3308  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3309  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3309  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3309  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3310  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3310  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3310  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3311  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3311  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3311  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3312  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3312  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3312  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3313  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3313  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3313  </DIV><DIV>Error   : C1008: Typedef name expected</DIV><DIV>MC9S08GT16.h line 3314  </DIV><DIV>Error   : C1007: Type specifier mismatch</DIV><DIV>MC9S08GT16.h line 3314  </DIV><DIV>Error   : C2450: Expected:  ~ ( IDENT </DIV><DIV>MC9S08GT16.h line 3314  </DIV><DIV>Error   : Compile failed</DIV><DIV>Warning : C1420: Result of function-call is ignored</DIV><DIV>radio.c line 108  </DIV><DIV>Warning : C1420: Result of function-call is ignored</DIV><DIV>radio.c line 113  </DIV><DIV>Warning : C2705: Possible loss of data</DIV><DIV>radio.c line 559  </DIV><DIV> </DIV></BODY></HTML> Fri, 14 Jul 2006 08:58:56 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124011#M6 Bud 2006-07-14T08:58:56Z Re: size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124012#M7 <HTML><HEAD></HEAD><BODY><DIV></DIV><DIV></DIV><P><FONT size="2">Hello Bud,</FONT></P><P><FONT size="2">Strictly speaking, this post is in the wrong forum - the CW forum might be more appropriate to this type of query.</FONT></P><P><FONT size="2">I suspect the errors are because you have defined values for Bit8 through to Bit15 that exceed the size of byte, whereas the size of Bit0 through to Bit7 do not.</FONT></P><P><FONT size="2">I am not sure why the defines are there - since you seem to be following the pattern used by the Freescale derivative files, so I might have expected something similar to the following:</FONT></P><FONT size="2"></FONT> <DIV><FONT face="Courier New" size="2">/*** DBGCAL - Debug Comparator A Low Register; 0x00001811 ***/<BR />typedef union {<BR /> byte Byte;<BR /> struct {<BR />   byte Bit0    :1;       /* Debug Comparator A Bit 0 */<BR />   byte Bit1    :1;       /* Debug Comparator A Bit 1 */<BR />   byte Bit2    :1;       /* Debug Comparator A Bit 2 */<BR />   byte Bit3    :1;       /* Debug Comparator A Bit 3 */<BR />   byte Bit4    :1;       /* Debug Comparator A Bit 4 */<BR />   byte Bit5    :1;       /* Debug Comparator A Bit 5 */<BR />   byte Bit6    :1;       /* Debug Comparator A Bit 6 */<BR />   byte Bit7    :1;       /* Debug Comparator A Bit 7 */<BR /> } Bits;<BR />} DBGCALSTR;<BR /></FONT></DIV><DIV><FONT face="Courier New" size="2">extern volatile DBGCALSTR _DBGCAL @ 0x00001811;</FONT></DIV><DIV><FONT size="2"></FONT> </DIV><DIV><FONT face="Courier New" size="2">/*** DBGCAH - Debug Comparator A High Register; 0x00001810 ***/<BR />typedef union {<BR /> byte Byte;<BR /> struct {<BR />   byte Bit8    :1;       /* Debug Comparator A Bit 8 */<BR />   byte Bit9    :1;       /* Debug Comparator A Bit 9 */<BR />   byte Bit10   :1;       /* Debug Comparator A Bit 10 */<BR />   byte Bit11   :1;       /* Debug Comparator A Bit 11 */<BR />   byte Bit12   :1;       /* Debug Comparator A Bit 12 */<BR />   byte Bit13   :1;       /* Debug Comparator A Bit 13 */<BR />   byte Bit14   :1;       /* Debug Comparator A Bit 14 */<BR />   byte Bit15   :1;       /* Debug Comparator A Bit 15 */<BR /> } Bits;<BR />} DBGCAHSTR;</FONT></DIV><DIV><FONT face="Courier New" size="2">extern volatile DBGCAHSTR _DBGCAH @ 0x00001810;</FONT></DIV><DIV><BR /><FONT size="2">The <FONT face="Courier New">volatile</FONT> would be necessary if a hardware register.  So you might then define</FONT></DIV><DIV><FONT size="2"></FONT> </DIV><DIV><FONT face="Courier New" size="2">#define DBGCA_BIT8  _DBGCAH.Bits.Bit8</FONT></DIV><DIV><FONT size="2">etc.</FONT></DIV><DIV><FONT size="2">I presume this is what you are trying to achieve.</FONT></DIV><DIV><FONT size="2"></FONT> </DIV><DIV><FONT size="2">Regards,<BR />Mac</FONT></DIV><DIV><FONT size="2"></FONT> </DIV><P><FONT size="2"></FONT> </P><P>Message Edited by bigmac on <SPAN class="date_text">2006-07-14</SPAN> <SPAN class="time_text">01:43 PM</SPAN></P></BODY></HTML> Fri, 14 Jul 2006 10:40:42 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124012#M7 bigmac 2006-07-14T10:40:42Z Re: size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124013#M8 <HTML><HEAD></HEAD><BODY><DIV>Thanks for your response.  The code segment I posted was from another person.  You basically confirmed what I was believing that basically Bits should not be typed as a byte but more as a word.</DIV><DIV> </DIV><DIV>Bud</DIV></BODY></HTML> Sat, 15 Jul 2006 11:18:04 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124013#M8 Bud 2006-07-15T11:18:04Z Re: size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124014#M9 <HTML><HEAD></HEAD><BODY><DIV></DIV><DIV><FONT size="2">Hello Bud,<BR /><BR /></FONT></DIV><BLOCKQUOTE><HR /><FONT size="1">Bud wrote:<BR /></FONT><FONT size="1">Thanks for your response.  The code segment I posted was from another person.  You basically confirmed what I was believing that basically Bits should not be typed as a byte but more as a word.</FONT></BLOCKQUOTE><BLOCKQUOTE><DIV><FONT size="1">Bud</FONT></DIV><HR /></BLOCKQUOTE><P><FONT size="2">Not if you require to handle the bits within two separate bytes, as your code would indicate.  So Bit0 through to Bit7 would pertain to the byte register DBGCAL, and Bit8 through to Bit15 to the byte register DBGCAH.</FONT></P><P><FONT size="2">I am not entirely sure what you are trying to achieve - my assumption was that you were aiming at the simplification of the handling of individual bits within the two single byte registers, by use of a name for each bit.</FONT></P><P><FONT size="2">You appear to be trying to identify the individual bits as both a mask (per the defines) and also within the structure.  My understanding of this issue is that only one of the methods would be required.</FONT></P><P><FONT size="2"></FONT><BR /><FONT size="2">Regards,<BR />Mac</FONT></P></BODY></HTML> Sat, 15 Jul 2006 13:59:00 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124014#M9 bigmac 2006-07-15T13:59:00Z Re: size of byte https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124015#M10 <HTML><HEAD></HEAD><BODY>The problem is a simple name collision one, it has nothing to do with the number of bits.<BR />After preprocessing, the compiler sees:<BR />..<BR />typedef union {<BR />byte Byte;<BR />struct {<BR />byte (0x0001) :1;<BR />byte (0x0002) :1;<BR />byte (0x0004) :1;<BR />..<BR />This is just not legal, whenever macros are used, checking the preprocessor is always a good idea.<BR /><BR />In order to resolve this name collision, you could:<BR />- use other names at one place (probably your macros, as macros are just more dangerous)<BR />- use enums instead of macros for the numerical values (enum {Bit0=1,Bit1=2..<BR />(this allows to keep the sources pretty much as they are)<BR />- not using the two headers together<BR /><BR /><BR />Daniel</BODY></HTML> Tue, 25 Jul 2006 02:25:39 GMT https://community.nxp.com/t5/Classic-Legacy-CodeWarrior/size-of-byte/m-p/124015#M10 CompilerGuru 2006-07-25T02:25:39Z