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Hi Does anyone know where can I get any free C Compiler for 68hc12. Also I would like to get a url for understanding complete instruction set in detail for 68hc12. Thanks Naheed |
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68hc12 C compiler and assembly instruction set
Started by ●August 7, 2003
Reply by ●August 7, 20032003-08-07
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Yup, I found it 12k size of code can be compiled by free standard edition of codewarrior, Yaaahoooo. Thanks to google search. http://www.metrowerks.com/MW/download/updates.asp? date_op=on+or+after&year&month&day=1&did=find&vers=CWHC12&submit =Select+Update+%3E%3E Thanks Naheed --- In , "Naheed M K" <naheedmk@y...> wrote: > Hi > Does anyone know where can I get any free C Compiler for 68hc12. > Also I would like to get a url for understanding complete instruction > set in detail for 68hc12. > > Thanks > Naheed |
Reply by ●August 7, 20032003-08-07
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Yup, I found it 12k size of code can be compiled by free standard edition of codewarrior, Yaaahoooo. Thanks to google search. http://www.metrowerks.com/MW/download/updates.asp? date_op=on+or+after&year&month&day=1&did=find&vers=CWHC12&submit =Select+Update+%3E%3E Thanks Naheed --- In , "Naheed M K" <naheedmk@y...> wrote: > Hi > Does anyone know where can I get any free C Compiler for 68hc12. > Also I would like to get a url for understanding complete instruction > set in detail for 68hc12. > > Thanks > Naheed |
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Reply by ●August 7, 20032003-08-07
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Your Yaaahoooo maybe short lived, once you start to decipher the codewarrior help and documentation. Metrowerks will provide you no help for this version. Walt --- In , "Naheed M K" <naheedmk@y...> wrote: > Yup, I found it 12k size of code can be compiled by free standard > edition of codewarrior, Yaaahoooo. Thanks to google search. > > http://www.metrowerks.com/MW/download/updates.asp? > date_op=on+or+after&year&month&day=1&did=find&vers=CWHC12&submit > =Select+Update+%3E%3E > > Thanks > Naheed > |
Reply by ●August 8, 20032003-08-08
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Am Thu, 07 Aug 2003 16:10:17 -0000 hat Naheed M K <> geschrieben: > Hi > Does anyone know where can I get any free C Compiler for 68hc12. Also I > would like to get a url for understanding complete instruction set in > detail for 68hc12. > > Thanks > Naheed Try the GNU-tools at http://m68hc11.serveftp.org. It compiles also for HC(S)12 For instruction set details you may look at the motorola website for the HC(S)12-core manual. Sorry have no link. Bye Daniel Postler |
Reply by ●August 8, 20032003-08-08
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The rest of the GNU stuff is: http://savannah.gnu.org/projects/m68hc11 http://www.gnu.org/software/m68hc11/ (It says 68hc11, but it's also 68gc12 and mc9s12/68hcs12) Installs easily in MS windows or linux. There is a busy Yahoo newsgroup for support. The code quality is as good as any commercial compiler, IMO. Unlike free commercial "limited releases", there are no limits on program size. --- In , "Naheed M K" <naheedmk@y...> wrote: > Hi > Does anyone know where can I get any free C Compiler for 68hc12. > Also I would like to get a url for understanding complete instruction > set in detail for 68hc12. > > Thanks > Naheed |
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Reply by ●August 8, 20032003-08-08
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Mysterious Mister Z wrote: [GNU C for the HC12] > The code quality is as good as any commercial compiler, IMO. Which of them do you know (Cosmic, Metrowerks, ICC...)? I assume you have some experience with GCC/HC12. I also had to decide which compiler to use but I found that some library functions were pretty bad. Nevertheless I'm interested how GNU C for the HC12 is improved. Could you please tell me how long (CPU cycles) an (unsigned long)/(unsigned long) division and a (float)/(float) division takes in the recent version? If there is still no reasonable int math, I'm afraid that float division is faster than long (thanks to Tim Housel). Does the compiler use the 32 bit HC12 operations where possible, e.g. U16 X, Y, Z; X = (U16)(((U32)Y * 1000) / (U16)Z); should use only emul and ediv, no library call. After all, I really dislike the usage of soft registers (because I use many interrupts). IMHO, for the HC12 it's not really necessary. Oliver -- Oliver Betz, Muenchen |
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Reply by ●August 8, 20032003-08-08
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In a message dated 8/8/03 11:06:58 AM Eastern Daylight Time, writes: Does the compiler use the 32 bit HC12 operations where possible, e.g. U16 X, Y, Z; X = (U16)(((U32)Y * 1000) / (U16)Z); should use only emul and ediv, no library call. ================================= This is a result I'd like to see for each compiler. |
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Reply by ●August 8, 20032003-08-08
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Hi Oliver, the problem for an ANSI C compiler with performing U16 X, Y, Z; X = (U16)(((U32)Y * 1000) / (U16)Z); with an EMUL and an EDIV is that if the 32/16 bit EDIV division overflows, then the HC12 does not generate a result at all (it just sets the V flag). Therefore using a simple EDIV does not generate the same result for all possible Y and Z's as calculating it with longs. Our metrowerks compiler does generate the code you are expecting, but only if you are specifying the option -PEDiv. The default is the save (and slower) long division. Apart from this, we are also not using any "soft registers". Bye Daniel > -----Original Message----- > From: Oliver Betz [mailto:] > Sent: Friday, August 08, 2003 17:06 > To: > Subject: Re: [68HC12] Re: 68hc12 C compiler and assembly instruction set > Mysterious Mister Z wrote: > > [GNU C for the HC12] > > > The code quality is as good as any commercial compiler, IMO. > > Which of them do you know (Cosmic, Metrowerks, ICC...)? > > I assume you have some experience with GCC/HC12. I also had to decide > which compiler to use but I found that some library functions were > pretty bad. Nevertheless I'm interested how GNU C for the HC12 is > improved. > > Could you please tell me how long (CPU cycles) an (unsigned > long)/(unsigned long) division and a (float)/(float) division takes > in the recent version? > > If there is still no reasonable int math, I'm afraid that float > division is faster than long (thanks to Tim Housel). > > Does the compiler use the 32 bit HC12 operations where possible, e.g. > > U16 X, Y, Z; > X = (U16)(((U32)Y * 1000) / (U16)Z); > > should use only emul and ediv, no library call. > > After all, I really dislike the usage of soft registers (because I > use many interrupts). IMHO, for the HC12 it's not really necessary. > > Oliver > -- > Oliver Betz, Muenchen > > -------------------- > > ">http://docs.yahoo.com/info/terms/ |
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Reply by ●August 8, 20032003-08-08
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wrote: > U16 X, Y, Z; > X = (U16)(((U32)Y * 1000) / (U16)Z); > > should use only emul and ediv, no library call. > ================================= > This is a result I'd like to see for each compiler. well, Cosmic produces this (obviously without the comments): ldd _Y ldy #1000 ; works also with a variable emul ldx _Z ; works also with a constant value ediv sty _X it's a piece of code I use pretty often for fast (fixed point) scaling, and I was happy to see that Cosmic produces optimal code. Oliver -- Oliver Betz, Muenchen |
