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Ömer Faruk
Joined: 15 Nov 2018
Posts: 42
Location: Çanakkale
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| Problem with making pin_a5 of pic18f46k22 high |
 Posted: Sun Mar 03, 2019 7:39 am |
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Hello everyone
İ am having a problem with turning high pin_a5 of pic18f46k22.
İ made all configurations about Tris, ansel registers.
When i operate code output_high(pin_a5); i see 0.6 V on physical pin .When i operate output_low(pin_a5) i see 0V or vice versa .İ think there is a problem of SS1 which slave select for spi communication.But i dont use spi communication.İ use i2c communication with ds3231 with i2c module 1 . İ mean there are two i2c module in pic18f46k22.Can anybody help me? |
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temtronic
Joined: 01 Jul 2010
Posts: 9221
Location: Greensville,Ontario
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| Posted: Sun Mar 03, 2019 8:46 am |
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Generally speaking you need to disable the comaparator and analog peripherals that are attached to I/O pins when using simple in/out.
Depending on the PIC, the ADC section is the default NOT standardor basic I/O.
Also, check the board, perhaps there's a short or solder whisker betweeen that pin and the one next to it. |
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Ömer Faruk
Joined: 15 Nov 2018
Posts: 42
Location: Çanakkale
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| Posted: Sun Mar 03, 2019 9:06 am |
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| temtronic wrote: | Generally speaking you need to disable the comaparator and analog peripherals that are attached to I/O pins when using simple in/out.
Depending on the PIC, the ADC section is the default NOT standardor basic I/O.
Also, check the board, perhaps there's a short or solder whisker betweeen that pin and the one next to it. |
Thank you for your reply i checked the pins for short circuit. pin_A5 and pin_E0 is short circuit. İ fixed it and problem solved. Thank you very much |
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temtronic
Joined: 01 Jul 2010
Posts: 9221
Location: Greensville,Ontario
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| Posted: Sun Mar 03, 2019 9:11 am |
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GREAT !! | Code: | //flash A5
#include <18f46k22.h> //processor
#include "46k22_fuses.h" //my fuses
#use delay(clock=16000000) //16MHz clock ( 8MHz worked as well)
#define led pin_a5 //pin with LED
main() {
while(TRUE) {
delay_ms(100); //delay for 1/2 second
output_toggle(led); //flip pin
} //end of while
} //end of main
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above code I just tested and it works...
Jay |
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