2 Attachment(s)
Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Hi there,
I'm playing around the 16F18446.
I just noticed the following:
Attachment 9617
I have used 73 words.
Now I'm trying to go for TOGGLE so:
Attachment 9618
I "spared" 4 words and the blinker still works.
Do I have to care about this warning?
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
substituting LATx registers for PORTx registers in pbp high level command statements will not work as you might hope
it can introduce subtle and difficult to diagnose bugs, it also will never set the TRISx registers in the manner those statements expect
Quote:
Do I have to care about this warning?
only if you want your code to work correctly
see this
https://www.picbasic.co.uk/forum/sho...1-OWOUT-Glitch
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Since the introduction of LAT registers, I cannot remember where I read it, maybe it was in Melabs either help file or this forum, we had to use LAT instead of PORT registers.
Οn some PIC it will not work properly.
But I have not found an explanation on this matter.
Ioannis
Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Quote:
Originally Posted by
richard
...only if you want your code to work correctly
Who wouldn't? :D
At this point, it's just about blinking that LED.
But after that, how will I be able to avoid any such kind of "mistakes"?
Please, please don't answer "Easy! Just rfm!!!"
For week-ends hobbyist like me, is it better to stay with more "modest" PICs and/or always use workarounds like instead of:
Code:
TOGGLE LATB.6
PAUSE 500
...I should choose to stay with:
Code:
LATB.6 = 1
PAUSE 500
LATB.6 = 0
PAUSE 500
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Quote:
For week-ends hobbyist like me, is it better to stay with more "modest" PICs and/or always use workarounds like instead
it has nothing to do with with the pic chip at all. its simply incorrect usage of the pbp high level commands
Quote:
Please, please don't answer "Easy! Just rfm!!!
did you even look at the link i suggested ? i don't know why i bother
all pbp "high level" commands that set a pin direction use a fixed offset to get to the tris reg
it simply will not work correctly from a LATx offset [serout , serout2, toggle,high,low,i2cread........................... ....... ie all of them
PORTx + offset always equals the TRISx register, LATx + offset does not equal the TRISx register ever
if you don't believe my then look at the lst file generated by your code
Code:
TOGGLE LATB.6
PAUSE 500
is improper use
Code:
TOGGLE PORTB.6
PAUSE 500
is proper use
Code:
LATB.6 = 1
PAUSE 500
LATB.6 = 0
PAUSE 500
is proper use
Code:
latb.6=!latb.6
PAUSE 500
is proper use
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
TRY THIS
Code:
' PIC 16F18446
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== DEFINES ===================================================================================
DEFINE OSC 4
ANSELB = $B0;
OSCCON1 = $60; // CSWHOLD may proceed; SOSCPWR Low power;
OSCCON3 = 0; // MFOEN disabled; LFOEN disabled; ADOEN disabled; SOSCEN disabled; EXTOEN disabled; HFOEN disabled;
OSCEN = 0 ; // HFFRQ 4_MHz;
OSCFRQ = 2; // HFTUN 0;
OSCTUNE = 0
' ====== TEST PROGRAM ==============================================================================
TEST:
TOGGLE PORTB.6
pause 500
GOTO TEST
END
THEN THIS
Code:
' PIC 16F18446
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== DEFINES ===================================================================================
DEFINE OSC 4
ANSELB = $B0;
OSCCON1 = $60; // CSWHOLD may proceed; SOSCPWR Low power;
OSCCON3 = 0; // MFOEN disabled; LFOEN disabled; ADOEN disabled; SOSCEN disabled; EXTOEN disabled; HFOEN disabled;
OSCEN = 0 ; // HFFRQ 4_MHz;
OSCFRQ = 2; // HFTUN 0;
OSCTUNE = 0
' ====== TEST PROGRAM ==============================================================================
TEST:
TOGGLE LATB.6
pause 500
GOTO TEST
END
WHICH ONE WORKS ?
Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Richard,
Sorry for my late reply.
First or upper code in your previous message dosen't work. The LED is steady ON and no warning message.
Lower or second code doesn't work either; no LED blinking AND I do have the warning message showing up again.
And "yes", I went to read the post you pointed me at.
Currently, this is the code that will make the LED blink and have no warnings after compiling:
Code:
' PIC 16F18446
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== REGISTERS SETTINGS =======================================================================
TRISB.6 = 0
' Oscillator Control Register1
OSCCON1 = %01100000 ' $60
' HFFRQ - Oscillator's Frequency Selection Register
OSCFRQ = %00000010 ' 4MHz
' ====== TEST PROGRAM =============================================================================
TEST:
LATB.6 = 1
PAUSE 500
LATB.6 = 0
PAUSE 500
GOTO TEST
END
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
That is the proper way to do it.
Ioannis
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Quote:
First or upper code in your previous message dosen't work
this works perfectly for me, i doubt you implemented it exactly as posted
i notice you don't set the pins used to digital mode
another correct way
Code:
' PIC 16F18426
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== DEFINES ===================================================================================
DEFINE OSC 4
ANSELC = $DF;
OSCCON1 = $60; // CSWHOLD may proceed; SOSCPWR Low power;
OSCCON3 = 0; // MFOEN disabled; LFOEN disabled; ADOEN disabled; SOSCEN disabled; EXTOEN disabled; HFOEN disabled;
OSCEN = 0 ; // HFFRQ 4_MHz;
OSCFRQ = 2; // HFTUN 0;
OSCTUNE = 0
' ====== TEST PROGRAM ==============================================================================
TEST:
TOGGLE PORTC.5
pause 500
GOTO TEST
END
Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
Richard, this is your exact code (no changes at all) and it lights the LED steady ON:
Code:
' PIC 16F18446
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== DEFINES ===================================================================================
DEFINE OSC 4
ANSELB = $B0;
OSCCON1 = $60; // CSWHOLD may proceed; SOSCPWR Low power;
OSCCON3 = 0; // MFOEN disabled; LFOEN disabled; ADOEN disabled; SOSCEN disabled; EXTOEN disabled; HFOEN disabled;
OSCEN = 0 ; // HFFRQ 4_MHz;
OSCFRQ = 2; // HFTUN 0;
OSCTUNE = 0
' ====== TEST PROGRAM ==============================================================================
TEST:
TOGGLE PORTB.6
pause 500
GOTO TEST
END
Unfortunately, the third example dosen't work either, this one:
Code:
' PIC 16F18426
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT1 & _CLKOUTEN_OFF & _CSWEN_ON & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTS_PWRT_64 & _LPBOREN_OFF & _BOREN_SBOREN & _BORV_LO & _ZCDDIS_OFF & _PPS1WAY_OFF & _STVREN_ON
__config _CONFIG3, _WDTCPS_WDTCPS_31 & _WDTE_SWDTEN & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _BBSIZE_BB512 & _BBEN_OFF & _SAFEN_OFF & _WRTAPP_OFF & _WRTB_OFF & _WRTC_OFF & _WRTD_OFF & _WRTSAF_OFF & _LVP_OFF
__config _CONFIG5, _CP_OFF
#ENDCONFIG
' ====== DEFINES ===================================================================================
DEFINE OSC 4
ANSELC = $DF;
OSCCON1 = $60; // CSWHOLD may proceed; SOSCPWR Low power;
OSCCON3 = 0; // MFOEN disabled; LFOEN disabled; ADOEN disabled; SOSCEN disabled; EXTOEN disabled; HFOEN disabled;
OSCEN = 0 ; // HFFRQ 4_MHz;
OSCFRQ = 2; // HFTUN 0;
OSCTUNE = 0
' ====== TEST PROGRAM ==============================================================================
TEST:
TOGGLE PORTC.5
pause 500
GOTO TEST
END
Maybe this last code doesnt work because you seem to use a 16F8246 not a 16F18446 like I have.
Honestly, I can have a real good life with LATBs commands instead of TOGGLEs :wink:
Re: Discovering PIC 16F18446 - TOGGLE "ASM WARNING - Invalid RAM location"
TOGGLE will not work.
Richard did explain why at post #5.
So, you have to use either directly PORT or LAT commands. Personally, never liked the TOGGLE command and always preferred to use discrete commands. Bonus that you know the final state of the register. With TOGGLE you only know that it has changed. Not how.
Ioannis