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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| 16F19176 PIN C2 not work input mode |
 Posted: Wed Dec 23, 2020 3:30 pm |
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Hi,
PIN_C2 pin of 16F19176 is detected as 1 even when the input is 0 when it is in input mode. Even if we connect the pin directly to VSS, the situation does not change.
Anyone have this problem?
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Wed Dec 23, 2020 3:35 pm |
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I don't use that PIC but general comments..
You should post a small,compilable program that we can test.
Odds are that pin is used for several peripherals(ie ADC,comp,LCD,???) and you haven't disabled them.
Another reason may be that the pin has a 'solder bridge or whisker' to VDD.
Jay |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Dec 23, 2020 6:03 pm |
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Pin C2 is available as an ordinary i/o pin.
But it can also be Seg18. Are you using the lcd module in that PIC ?
If you are, it's possible that you enabled Seg18.
Post your small test program that toggles pin C2. |
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 5:40 am |
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| PCM programmer wrote: | Pin C2 is available as an ordinary i/o pin.
But it can also be Seg18. Are you using the lcd module in that PIC ?
If you are, it's possible that you enabled Seg18.
Post your small test program that toggles pin C2. |
Below you can see a piece of my fuse settings code
fuses seting..
| Code: |
#device ADC=12
#device *=8
#FUSES RSTOSC_HFINTRC_PLL //On Power-up clock running from HFINTRC with 4x PLL
#FUSES VBATEN //VBAT functionality is enabled
#FUSES NOLCDPEN //LCD Charge Pump forced off
#FUSES NOMCLR //Master Clear pin used for I/O
#FUSES BORV27 //Brownout reset at 2.7V
#FUSES NOZCDDIS //Zero-cross detect circuit is enabled at POR
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWDT //WDT512
#FUSES PROTECT
#FUSES NOEXTOSC |
| Code: |
.................... if(input(pin_c2)==0 && nemgirisisayac<20) nemgirisisayac++;
096A: MOVLB 00
096B: BSF 14.2
096C: BTFSC 0E.2
096D: GOTO 177
096E: MOVLB 01
096F: MOVF 3F,W
0970: SUBLW 13
0971: BTFSC 03.0
0972: GOTO 175
0973: MOVLB 00
0974: GOTO 177
0975: INCF 3F,F
0976: MOVLB 00
.................... if(input(pin_c2)==1 && nemgirisisayac>0 ) nemgirisisayac--;
0977: BSF 14.2
0978: BTFSS 0E.2
0979: GOTO 182
097A: MOVLB 01
097B: MOVF 3F,F
097C: BTFSS 03.2
097D: GOTO 180
097E: MOVLB 00
097F: GOTO 182
0980: DECF 3F,F
0981: MOVLB 00 |
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Thu Dec 24, 2020 7:50 am |
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some comments...
1) change PROTECT to NOPROTECT i the FUSES section. There's no need to protect the PIC until final product goes 'out the door' to the customer. Using noprotect will extend the life of the PIC ( # of burns....)
2) you should just try a simple 'toggle on pin status' not some 'complicated' function. I don't use that PIC but the asm code does show proper testing of the pin (providing the address of the register is correct). |
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 12:18 pm |
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| temtronic wrote: | some comments...
1) change PROTECT to NOPROTECT i the FUSES section. There's no need to protect the PIC until final product goes 'out the door' to the customer. Using noprotect will extend the life of the PIC ( # of burns....)
2) you should just try a simple 'toggle on pin status' not some 'complicated' function. I don't use that PIC but the asm code does show proper testing of the pin (providing the address of the register is correct). |
C2 pin works correctly as output mode. Problem just input mode. and i try set_input_level_c(0xFF); command but reasult not change.
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 12:53 pm |
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I had similar issue with 16F19197.
I tried the code below but it still didn't work.
| Code: |
#byte PORTC = getenv("SFR:PORTC")
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| Code: |
.................... if(!bit_test(PORTC, 2)) nemgirisidevrede=0;
096A: MOVLB 00
096B: BTFSC 0E.2
096C: GOTO 170
096D: MOVLB 01
096E: CLRF 40
096F: MOVLB 00
.................... if(bit_test(PORTC, 2)) nemgirisidevrede=1;
0970: BTFSS 0E.2
0971: GOTO 176
0972: MOVLW 01
0973: MOVLB 01
0974: MOVWF 40
0975: MOVLB 00
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 1:59 pm |
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analog port settings are in my code;
| Code: |
setup_adc (ADC_CLOCK_DIV_64);
setup_adc_reference (VSS_VDD);
setup_adc_ports (sAN0 | sAN23 | sAN34, VSS_VDD);
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if you turn off analog inputs
| Code: | | setup_adc_ports (NO_ANALOGS); |
If I write, pin_c2 works normally as input.
could it be a compiler error?
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Thu Dec 24, 2020 2:11 pm |
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yes, that's why we've asked for your simple,small test program that shows the problem, so that we can test.
Also you need to post what compiler version you're using.
The problem with just showing parts of a program is we don't KNOW what the rest of it is doing(all the fuses, setup before main(), something else ???
Since the pin works with 'no_analogs', it sound like it _might_ be a compiler bug...
Jay |
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 2:56 pm |
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it's work correct.
| Code: |
set_analog_pins(PIN_A0,PIN_C7,PIN_E2);
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below define in 16f19176.h file adc parameters
| Code: |
#define sAN18 0x00000400 //| C2
#define sAN34 0x00000400 //| E2
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i think compiler if use setup_adc_ports (); command make mistake.
I haven't come across an example code on how to use port e pins with the set_adc_ports() command.
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Thu Dec 24, 2020 3:10 pm |
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Compiler version is 5.097
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Dec 24, 2020 8:16 pm |
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Here is a small test program. It works. I tested it in hardware with
CCS vs. 5.097 just now. Pin C2 has a push-button switch connected to it.
The switch puts ground on Pin C2 if pressed. Pin C2 has a 4.7K pull-up
resistor on it (to +5v) so the idle state is a logic '1' on Pin C2.
| Code: |
#include <16F19176.h>
#use delay(internal=4M)
//==========================
void main(void)
{
while(TRUE)
{
if(input(PIN_C2) == 0) // If pressed button
output_high(PIN_B0); // then turn on LED
else
output_low(PIN_B0); // else turn LED off
delay_ms(20); // Debounce period
}
} |
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| Posted: Fri Dec 25, 2020 1:40 am |
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Dear PCM programmer,
Reason
setup_adc_ports (sAN0 | sAN23 | sAN34, VSS_VDD); When using the command pin_c2 pin remains as analog input.
set_analog_pins (PIN_A0, PIN_C7, PIN_E2); Using the command pin_c2 and pin_e2 conflict can be avoided.
The following definitions are from the 16f19176.h file.
#define sAN18 0x00000400 // | C2
#define sAN34 0x00000400 // | E2
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Dec 25, 2020 3:28 am |
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According to the 16F19176.h file, the values for Port E go in the 2nd
parameter, like this:
| Quote: | | setup_adc_ports (sAN0 | sAN23, sAN34, VSS_VDD); |
Then it works:
| Code: | .................... setup_adc_ports (sAN0 | sAN23, [b]sAN34[/b], VSS_VDD);
0023: MOVLW 00
0024: MOVLB 02
0025: MOVWF ADREF
0026: MOVLW 01
0027: MOVLB 3E // Bank 62 decimal
0028: MOVWF 38 // ANSELA: pin A0 (sAN0) is analog
0029: MOVLW 00
002A: MOVWF 43 // ANSELB: All digital
002B: MOVLW 80
002C: MOVWF 4E // ANSELC: Pin C7 (sAN23) is analog
002D: MOVLW 00
002E: MOVWF 59 // ANSELD: All digital
002F: MOVLW 04
0030: MOVWF 64 // ANSELE: Pin E2 (sAN34) is analog
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Test program:
| Code: | #include <16F19176.h>
#use delay(internal=4M)
//======================
void main(void)
{
setup_adc_ports (sAN0 | sAN23, sAN34, VSS_VDD);
while(TRUE);
} |
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esbelektronik
Joined: 13 Dec 2018
Posts: 23
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| thanks. |
| Posted: Fri Dec 25, 2020 1:01 pm |
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dear PCM Programmer thanks for help.
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