|
hi all, I am using the c5402 kit for a university project. I am new to dsp I'm a C programmer. I already know the addresses of the memory-mapped registers. I am now wondering how I could edit/access the contents of a register in c code. I am thinking of saving the address to a pointer data and then use the indirection (*) operator to edit/view its contents. For example int *ptr; ptr=0x0007f; //register in address 0x0007f *ptr=0x00001; //write 0x00001 to register printf("%d",*ptr); //view contents of register am i thinking about it correctly or otherwise? best regards, leonor |
|
|
new c5402 user- C programmer, viewing/editing registers
Started by ●May 13, 2002
Reply by ●May 14, 20022002-05-14
|
Yes, that will work fine. you might consider setting the registers in definition statements so you can write to them by name: #define my register (unsigned int*)0xmyregaddress and using something like: *(int*)myregister=(int)(my value); although that's a little redundant. >hi all, >I am using the c5402 kit for a university project. I am new to dsp >I'm a C programmer. I already know the addresses of the memory-mapped >registers. I am now wondering how I could edit/access the contents of >a register in c code. I am thinking of saving the address to a >pointer data and then use the indirection (*) operator to edit/view >its contents. For example > >int *ptr; >ptr=0x0007f; //register in address 0x0007f >*ptr=0x00001; //write 0x00001 to register >printf("%d",*ptr); //view contents of register > >am i thinking about it correctly or otherwise? > >best regards, >leonor > > >________________________________________________________________________ >________________________________________________________________________ > >">http://docs.yahoo.com/info/terms/ |
Reply by ●May 14, 20022002-05-14
|
Hi Texas has an application note, spra260, which describes a method (using pointers) for accessing memory mapped registers from C code. Best regards Torgeir Jakobsen Senior Engineer, Technology Department Aanderaa Instruments AS e-mail: web: www.aanderaa.com phone; +47 55 10 99 00 direct: +47 55 10 99 77 fax: +47 55 10 99 10 ----- Original Message ----- From: "ensalada20022000" <> To: <> Sent: Monday, May 13, 2002 6:20 AM Subject: [c54x] new c5402 user- C programmer, viewing/editing registers > hi all, > I am using the c5402 kit for a university project. I am new to dsp > I'm a C programmer. I already know the addresses of the memory-mapped > registers. I am now wondering how I could edit/access the contents of > a register in c code. I am thinking of saving the address to a > pointer data and then use the indirection (*) operator to edit/view > its contents. For example > > int *ptr; > ptr=0x0007f; //register in address 0x0007f > *ptr=0x00001; //write 0x00001 to register > printf("%d",*ptr); //view contents of register > > am i thinking about it correctly or otherwise? > > best regards, > leonor > > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: Send an email to > > To Post: Send an email to > > To Leave: Send an email to > > Archives: http://www.yahoogroups.com/group/c54x > > Other Groups: http://www.dsprelated.com > ">http://docs.yahoo.com/info/terms/ > -- > This e-mail has been protected by Song Networks' virus-scan service: > http://www.securemail.no > -- This e-mail has been protected by Song Networks' virus-scan service: http://www.securemail.no |
