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Dear PICLIST group, I have a question. I wanted to make a program to check if the portb 7 I/O is high or low and depending on the status of it to change the status of portb 6! I am using pic 16F877A. I put + 5V on portb 7 but the status doesn't change. Can you help me to solve my problem? I don't where I make the misstake Here is the code: DEFINE OSC 20 symbol Refa = PORTB.7 SYMBOL LED = PORTB.6 MAIN: INPUT REFA IF REFA = 1 THEN HIGH LED ELSE LOW LED ENDIF GOTO MAIN END Thank you Best regards, Refik |
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INPUT Line Problem
Started by ●October 3, 2003
Posted by ●October 3, 2003
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the first thing i notice is that you haven't set port7 as input (digital) and port6 as output (digital). i'm not familar with that chip but the datasheet will tell you the register values that you need to change steven --- In , "integrodev" <integrodev@h...> wrote: > Dear PICLIST group, > > I have a question. I wanted to make a program to check if the portb 7 > I/O is high or low and depending on the status of it to change the > status of portb 6! I am using pic 16F877A. I put + 5V on portb 7 but > the status doesn't change. Can you help me to solve my problem? I > don't where I make the misstake > > Here is the code: > > DEFINE OSC 20 > symbol Refa = PORTB.7 > SYMBOL LED = PORTB.6 > > MAIN: > > INPUT REFA > > IF REFA = 1 THEN > HIGH LED > ELSE > LOW LED > ENDIF > > GOTO MAIN > END > > Thank you > > Best regards, > Refik |
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Posted by ●October 3, 2003
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Thank you but didn't understand you fully, it is because I am a beginner. Thank you Steven. I hope I can get more replies about this problem. It will help me to solve it Best regards, Refik Hadzialic --- In , "swmillar" <SWMillar@a...> wrote: > the first thing i notice is that you haven't set port7 as input > (digital) and port6 as output (digital). i'm not familar with that > chip but the datasheet will tell you the register values that you > need to change > > steven > > --- In , "integrodev" <integrodev@h...> wrote: > > Dear PICLIST group, > > > > I have a question. I wanted to make a program to check if the portb > 7 > > I/O is high or low and depending on the status of it to change the > > status of portb 6! I am using pic 16F877A. I put + 5V on portb 7 > but > > the status doesn't change. Can you help me to solve my problem? I > > don't where I make the misstake > > > > Here is the code: > > > > DEFINE OSC 20 > > symbol Refa = PORTB.7 > > SYMBOL LED = PORTB.6 > > > > MAIN: > > > > INPUT REFA > > > > IF REFA = 1 THEN > > HIGH LED > > ELSE > > LOW LED > > ENDIF > > > > GOTO MAIN > > END > > > > Thank you > > > > Best regards, > > Refik |
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Posted by ●October 3, 2003
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How are you checking PORT B? With the LED or a multimeter? If with a LED then check that you have it connected the right way round. If you have a multimeter, then disconnect the LED and check to see if 5v appears on Bit6 when you apply 5v to bit7. If nothing happens, you need to check the CONFIG sent by your programmer to the PIC. You may need to disable the Watchdog timer. This is enabled automatically and has to be switched off. Which version of Basic are you using? Colin -- cdb, on 04.10.2003 I have always been a few Dendrites short of an Axon and believe me it shows. Light travels faster than sound. That's why some people appear bright until they speak! |
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Posted by ●October 4, 2003
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I have both but I tested it with a LED. I checked it and it was connected correctly. When I dissable the intern pull up resistors and disable the watchdog timer, it works but not fast. When I bring high on portb.7 and remove it, the portb.6 is high for about 8-9 seconds and then gets low, I tried to do this over a 10 k resistor but same results? Can you help me Colin or anybody in the list, had anybody else this problem? I tried it with another 16F877A but same stuff happens. Thank you DEFINE OSC 20 OPTION_REG.bit7 = 1 TRISB = %10000000 'svi pinovi su izlazni sem rb7 symbol ulaz = portb.7 SYMBOL led = portb.6 low led 'ugasi led main: if ULAZ=1 then upali low led goto main end upali: high led goto main Thank you Best regards, Refik --- In , cdb <cdb@b...> wrote: > How are you checking PORT B? With the LED or a multimeter? > > If with a LED then check that you have it connected the right way > round. > > If you have a multimeter, then disconnect the LED and check to see if > 5v appears on Bit6 when you apply 5v to bit7. > > If nothing happens, you need to check the CONFIG sent by your > programmer to the PIC. You may need to disable the Watchdog timer. > > This is enabled automatically and has to be switched off. > > Which version of Basic are you using? > > Colin > -- > cdb, bodgy1@o... on 04.10.2003 > > I have always been a few Dendrites short of an Axon and believe me it > shows. > > Light travels faster than sound. That's why some people appear bright > until they speak! |
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Posted by ●October 4, 2003
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Forgot to add which version I use. I am using PicBasic Pro Compiler Ver. 2.42. Thank you Best regards, Refa --- In , "integrodev" <integrodev@h...> wrote: > I have both but I tested it with a LED. I checked it and it was > connected correctly. When I dissable the intern pull up resistors and > disable the watchdog timer, it works but not fast. When I bring high > on portb.7 and remove it, the portb.6 is high for about 8-9 seconds > and then gets low, I tried to do this over a 10 k resistor but same > results? Can you help me Colin or anybody in the list, had anybody > else this problem? I tried it with another 16F877A but same stuff > happens. Thank you > > DEFINE OSC 20 > OPTION_REG.bit7 = 1 > > TRISB = %10000000 'svi pinovi su izlazni sem rb7 > symbol ulaz = portb.7 > SYMBOL led = portb.6 > low led 'ugasi led > > main: > > if ULAZ=1 then upali > low led > goto main > end > > upali: > > high led > goto main > > Thank you > > Best regards, > Refik > --- In , cdb <cdb@b...> wrote: > > How are you checking PORT B? With the LED or a multimeter? > > > > If with a LED then check that you have it connected the right way > > round. > > > > If you have a multimeter, then disconnect the LED and check to see > if > > 5v appears on Bit6 when you apply 5v to bit7. > > > > If nothing happens, you need to check the CONFIG sent by your > > programmer to the PIC. You may need to disable the Watchdog timer. > > > > This is enabled automatically and has to be switched off. > > > > Which version of Basic are you using? > > > > Colin > > -- > > cdb, bodgy1@o... on 04.10.2003 > > > > I have always been a few Dendrites short of an Axon and believe me > it > > shows. > > > > Light travels faster than sound. That's why some people appear > bright > > until they speak! |
Posted by ●October 4, 2003
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Sorry, I have not been following your problem, and I don't know what program you are using, but in my world, 'ulaz' does not equal 'ULAZ'. And you ended the program before the last 2 lines. Chad --- integrodev <> wrote: > I have both but I tested it with a LED. I checked it and it was > connected correctly. When I dissable the intern pull up resistors and > > disable the watchdog timer, it works but not fast. When I bring high > on portb.7 and remove it, the portb.6 is high for about 8-9 seconds > and then gets low, I tried to do this over a 10 k resistor but same > results? Can you help me Colin or anybody in the list, had anybody > else this problem? I tried it with another 16F877A but same stuff > happens. Thank you > > DEFINE OSC 20 > OPTION_REG.bit7 = 1 > > TRISB = %10000000 'svi pinovi su izlazni sem rb7 > symbol ulaz = portb.7 > SYMBOL led = portb.6 > low led 'ugasi led > > main: > > if ULAZ=1 then upali > low led > goto main > end > > upali: > > high led > goto main > > Thank you > > Best regards, > Refik > --- In , cdb <cdb@b...> wrote: > > How are you checking PORT B? With the LED or a multimeter? > > > > If with a LED then check that you have it connected the right way > > round. > > > > If you have a multimeter, then disconnect the LED and check to see > if > > 5v appears on Bit6 when you apply 5v to bit7. > > > > If nothing happens, you need to check the CONFIG sent by your > > programmer to the PIC. You may need to disable the Watchdog timer. > > > > This is enabled automatically and has to be switched off. > > > > Which version of Basic are you using? > > > > Colin > > -- > > cdb, bodgy1@o... on 04.10.2003 > > > > I have always been a few Dendrites short of an Axon and believe me > it > > shows. > > > > Light travels faster than sound. That's why some people appear > bright > > until they speak! __________________________________ |
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Posted by ●October 4, 2003
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Hmm I solved the problem. Thank you pal for the help but it wasn't the problem I didn't put a 10 K resistor, oh my bad, me=stupid. Thank you all, and you Colin esspecialy :) Best regards, Refa --- In , Chad Russel <chadrussel@y...> wrote: > Sorry, I have not been following your problem, and I don't know what > program you are using, but in my world, 'ulaz' does not equal 'ULAZ'. > And you ended the program before the last 2 lines. > > Chad > > --- integrodev <integrodev@h...> wrote: > > I have both but I tested it with a LED. I checked it and it was > > connected correctly. When I dissable the intern pull up resistors and > > > > disable the watchdog timer, it works but not fast. When I bring high > > on portb.7 and remove it, the portb.6 is high for about 8-9 seconds > > and then gets low, I tried to do this over a 10 k resistor but same > > results? Can you help me Colin or anybody in the list, had anybody > > else this problem? I tried it with another 16F877A but same stuff > > happens. Thank you > > > > DEFINE OSC 20 > > OPTION_REG.bit7 = 1 > > > > TRISB = %10000000 'svi pinovi su izlazni sem rb7 > > symbol ulaz = portb.7 > > SYMBOL led = portb.6 > > > > > > low led 'ugasi led > > > > main: > > > > if ULAZ=1 then upali > > low led > > goto main > > end > > > > upali: > > > > high led > > goto main > > > > Thank you > > > > Best regards, > > Refik > > --- In , cdb <cdb@b...> wrote: > > > How are you checking PORT B? With the LED or a multimeter? > > > > > > If with a LED then check that you have it connected the right way > > > round. > > > > > > If you have a multimeter, then disconnect the LED and check to see > > if > > > 5v appears on Bit6 when you apply 5v to bit7. > > > > > > If nothing happens, you need to check the CONFIG sent by your > > > programmer to the PIC. You may need to disable the Watchdog timer. > > > > > > This is enabled automatically and has to be switched off. > > > > > > Which version of Basic are you using? > > > > > > Colin > > > -- > > > cdb, bodgy1@o... on 04.10.2003 > > > > > > I have always been a few Dendrites short of an Axon and believe me > > it > > > shows. > > > > > > Light travels faster than sound. That's why some people appear > > bright > > > until they speak! > > > > > __________________________________ > |
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Posted by ●October 4, 2003
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"I have not failed. I've just found 10,000 ways that won't work."
-- Thomas Edison --- integrodev <> wrote: > Hmm I solved the problem. Thank you pal for the help but it wasn't > the problem I didn't put a 10 K resistor, oh my bad, me=stupid. > > Thank you all, and you Colin esspecialy :) > > Best regards, > Refa > > --- In , Chad Russel <chadrussel@y...> wrote: > > Sorry, I have not been following your problem, and I don't know > what > > program you are using, but in my world, 'ulaz' does not > equal 'ULAZ'. > > And you ended the program before the last 2 lines. > > > > Chad > > > > --- integrodev <integrodev@h...> wrote: > > > I have both but I tested it with a LED. I checked it and it was > > > connected correctly. When I dissable the intern pull up resistors > > and > > > > > > disable the watchdog timer, it works but not fast. When I bring > high > > > on portb.7 and remove it, the portb.6 is high for about 8-9 > seconds > > > and then gets low, I tried to do this over a 10 k resistor but > same > > > results? Can you help me Colin or anybody in the list, had > anybody > > > else this problem? I tried it with another 16F877A but same stuff > > > > happens. Thank you > > > > > > DEFINE OSC 20 > > > OPTION_REG.bit7 = 1 > > > > > > TRISB = %10000000 'svi pinovi su izlazni sem rb7 > > > symbol ulaz = portb.7 > > > SYMBOL led = portb.6 > > > > > > > > > low led 'ugasi led > > > > > > main: > > > > > > if ULAZ=1 then upali > > > low led > > > goto main > > > end > > > > > > upali: > > > > > > high led > > > goto main > > > > > > Thank you > > > > > > Best regards, > > > Refik > > > --- In , cdb <cdb@b...> wrote: > > > > How are you checking PORT B? With the LED or a multimeter? > > > > > > > > If with a LED then check that you have it connected the right > way > > > > round. > > > > > > > > If you have a multimeter, then disconnect the LED and check to > see > > > if > > > > 5v appears on Bit6 when you apply 5v to bit7. > > > > > > > > If nothing happens, you need to check the CONFIG sent by your > > > > programmer to the PIC. You may need to disable the Watchdog > timer. > > > > > > > > This is enabled automatically and has to be switched off. > > > > > > > > Which version of Basic are you using? > > > > > > > > Colin > > > > -- > > > > cdb, bodgy1@o... on 04.10.2003 > > > > > > > > I have always been a few Dendrites short of an Axon and believe > > me > > > it > > > > shows. > > > > > > > > Light travels faster than sound. That's why some people appear > > > bright > > > > until they speak! > > > > > > > > > > > > > > __________________________________ > > > __________________________________ |
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Posted by ●October 4, 2003
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Hahaha true, very true :) Nice proverb, thank you Best regards, Refa --- In , Chad Russel <chadrussel@y...> wrote: > "I have not failed. I've just found 10,000 ways that won't work." - - > Thomas Edison > > --- integrodev <integrodev@h...> wrote: > > Hmm I solved the problem. Thank you pal for the help but it wasn't > > the problem I didn't put a 10 K resistor, oh my bad, me=stupid. > > > > Thank you all, and you Colin esspecialy :) > > > > Best regards, > > Refa > > > > --- In , Chad Russel <chadrussel@y...> wrote: > > > Sorry, I have not been following your problem, and I don't know > > what > > > program you are using, but in my world, 'ulaz' does not > > equal 'ULAZ'. > > > And you ended the program before the last 2 lines. > > > > > > Chad > > > > > > --- integrodev <integrodev@h...> wrote: > > > > I have both but I tested it with a LED. I checked it and it was > > > > connected correctly. When I dissable the intern pull up resistors > > > > and > > > > > > > > disable the watchdog timer, it works but not fast. When I bring > > high > > > > on portb.7 and remove it, the portb.6 is high for about 8-9 > > seconds > > > > and then gets low, I tried to do this over a 10 k resistor but > > same > > > > results? Can you help me Colin or anybody in the list, had > > anybody > > > > else this problem? I tried it with another 16F877A but same stuff > > > > > > happens. Thank you > > > > > > > > DEFINE OSC 20 > > > > OPTION_REG.bit7 = 1 > > > > > > > > TRISB = %10000000 'svi pinovi su izlazni sem rb7 > > > > symbol ulaz = portb.7 > > > > SYMBOL led = portb.6 > > > > > > > > > > > > low led 'ugasi led > > > > > > > > main: > > > > > > > > if ULAZ=1 then upali > > > > low led > > > > goto main > > > > end > > > > > > > > upali: > > > > > > > > high led > > > > goto main > > > > > > > > Thank you > > > > > > > > Best regards, > > > > Refik > > > > --- In , cdb <cdb@b...> wrote: > > > > > How are you checking PORT B? With the LED or a multimeter? > > > > > > > > > > If with a LED then check that you have it connected the right > > way > > > > > round. > > > > > > > > > > If you have a multimeter, then disconnect the LED and check to > > see > > > > if > > > > > 5v appears on Bit6 when you apply 5v to bit7. > > > > > > > > > > If nothing happens, you need to check the CONFIG sent by your > > > > > programmer to the PIC. You may need to disable the Watchdog > > timer. > > > > > > > > > > This is enabled automatically and has to be switched off. > > > > > > > > > > Which version of Basic are you using? > > > > > > > > > > Colin > > > > > -- > > > > > cdb, bodgy1@o... on 04.10.2003 > > > > > > > > > > I have always been a few Dendrites short of an Axon and believe > > > > me > > > > it > > > > > shows. > > > > > > > > > > Light travels faster than sound. That's why some people appear > > > > bright > > > > > until they speak! > > > > > > > > > > > > > > > > > > > > __________________________________ > > > > > __________________________________ > |
