piclist | CCS and power saving mode on pic16f628...

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Hi all,

I had a battery powered project running on the 16F628 programmed in asm... in sleep mode I had 0.35 mA. Giving more than 30 days of autonomy in sleep mode with a standard PP3 battery.. That was cool, but...

For complexity reasons I switched to the CCS compiler, and doing "the same" things I get 1.3mA which is a lot too much for my application... Reducing the autonomy to a poor little week...

My prog, is INT0 driven. The Wake up is done by the int. I have a nop just after the "sleep()" command...

I have check that the sleep in working properly. The board behave as needed, only the consuption during sleep is too large...

Any pointers, on some code to be used or some register configs that has to be set properly to avoid this problem, would be great !!!

Thanks a lot for any helping hand !!

Vincent

Reply by Dennis Clark ●December 12, 20052005-12-12

Vincent wrote: > Hi all, > > I had a battery powered project running on the 16F628 programmed in > asm... in sleep mode I had 0.35 mA. Giving more than 30 days of autonomy > in sleep mode with a standard PP3 battery.. That was cool, but... > For complexity reasons I switched to the CCS compiler, and doing "the > same" things I get 1.3mA which is a lot too much for my application... > Reducing the autonomy to a poor little week... > > My prog, is INT0 driven. The Wake up is done by the int. I have a nop > just after the "sleep()" command... > I have check that the sleep in working properly. The board behave as > needed, only the consuption during sleep is too large... > > Any pointers, on some code to be used or some register configs that has > to be set properly to avoid this problem, would be great !!! > > Thanks a lot for any helping hand !! > > Vincent Take a look at that ASM output of the CCS compiler and see what they did. They may not have set some fuses the way you did. CCS does not deal very well with explicit, specific "deep" settings like ISRs and CONFIG flags - I often have to go around the compiler and do it myself in asm to get what I want. DLC -- --- Dennis Clark TTT Enterprises ---

Reply by upand_at_them ●December 12, 20052005-12-12

Yeah, compare the ASM output from both. See if CCS is turing off the analog functions and other peripherals. You can also load each hex file into a programmer such as IC-Prog and see the fuses being set. Mike --- In piclist@picl..., "Vincent" <vincent.clerc@i...> wrote: > > Hi all, > > I had a battery powered project running on the 16F628 programmed in asm... > in sleep mode I had 0.35 mA. Giving more than 30 days of autonomy in sleep > mode with a standard PP3 battery.. That was cool, but... > For complexity reasons I switched to the CCS compiler, and doing "the same" > things I get 1.3mA which is a lot too much for my application... Reducing > the autonomy to a poor little week... > > My prog, is INT0 driven. The Wake up is done by the int. I have a nop just > after the "sleep()" command... > I have check that the sleep in working properly. The board behave as needed, > only the consuption during sleep is too large... > > Any pointers, on some code to be used or some register configs that has to > be set properly to avoid this problem, would be great !!! > > Thanks a lot for any helping hand !! > > Vincent >

Reply by Alan Marconett ●December 12, 20052005-12-12

Hi Mike, That does bring up an interesting question. I expect to see source code in a CCS format for a program shortly (FTP, so I can't download until I get home), and I'm going to want to port it to PICC 18 C compiler. I know CCS puts a lot of its initialization code in helpful functions (?), but I can't find the source for them (licensed CCS about 8 years ago). Do you know if they are available? I'd disassembled a previous project with supplied hex code and compared it with supplied C code, but it's not an easy job (a very simple program for a tach). Alan KM6VV > -----Original Message----- > From: piclist@picl... [mailto:piclist@picl...] On Behalf > Of upand_at_them > Sent: Monday, December 12, 2005 2:50 PM > To: piclist@picl... > Subject: [piclist] Re: CCS and power saving mode on pic16f628... > > Yeah, compare the ASM output from both. See if CCS is turing off the > analog functions and other peripherals. You can also load each hex > file into a programmer such as IC-Prog and see the fuses being set. > > Mike >

Reply by upand_at_them ●December 13, 20052005-12-13

Alan, I don't know anything about CCS, sorry. I use JAL myself. Mike --- In piclist@picl..., "Alan Marconett" <KM6VV@a...> wrote: > > Hi Mike, > > That does bring up an interesting question. I expect to see source code in > a CCS format for a program shortly (FTP, so I can't download until I get > home), and I'm going to want to port it to PICC 18 C compiler. I know CCS > puts a lot of its initialization code in helpful functions (?), but I can't > find the source for them (licensed CCS about 8 years ago). Do you know if > they are available? I'd disassembled a previous project with supplied hex > code and compared it with supplied C code, but it's not an easy job (a very > simple program for a tach). > > Alan KM6VV

Reply by Alan Marconett ●December 13, 20052005-12-13

HI Mike, OK, I must have misread. I was under the impression that you were quite familiar with CCS! Thanks, Alan KM6VV > -----Original Message----- > From: piclist@picl... [mailto:piclist@picl...] On Behalf > Of upand_at_them > Sent: Tuesday, December 13, 2005 6:58 AM > To: piclist@picl... > Subject: [piclist] Re: CCS and power saving mode on pic16f628... > > Alan, > > I don't know anything about CCS, sorry. I use JAL myself. > > Mike >

CCS and power saving mode on pic16f628...

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