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newguy
Joined: 24 Jun 2004
Posts: 1911
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| PIC18F46K80: PIN_C2, what am I missing? |
 Posted: Thu Sep 14, 2017 3:35 pm |
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Edit: brain fart when typing the subject line. Fixed now.
v5.074
I know I'm missing something simple but for the life of me I just can't see it. I can't get PIN_C2 to be an output. I know that CCP2 takes priority and that timer 1's gate input may factor in too, but I can't get control over that pin no matter what I do. I've tried removing power from both CCP2 and timer 1 via their PMD (peripheral module disable) bits.
No matter what combination of values I stick in timer 1's control register, I just can't get PIN_C2 to toggle. It's an input and I can't get it to become an output.
What should I be powering off/disabling in order to take control of C2?
| Code: | #include <18F46K80.h>
#device ADC=12
#FUSES NOWDT //No Watch Dog Timer
#use delay(clock=64000000,crystal=16000000)
#use rs232(UART1,baud=9600,errors)
#byte TXREG1=getenv("SFR:TXREG1")
void main() {
setup_timer_1(T1_DISABLED);
setup_ccp2(CCP_OFF);
output_c(0x00);
set_tris_c(0x80);
while (TRUE) {
output_high(PIN_C5);
output_high(PIN_C4);
output_high(PIN_C3);
output_high(PIN_C2);
output_high(PIN_C1);
output_high(PIN_C0);
delay_ms(250);
output_low(PIN_C5);
output_low(PIN_C4);
output_low(PIN_C3);
output_low(PIN_C2);
output_low(PIN_C1);
output_low(PIN_C0);
delay_ms(250);
TXREG1 = '-';
}
} |
Last edited by newguy on Thu Sep 14, 2017 3:56 pm; edited 2 times in total |
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gaugeguy
Joined: 05 Apr 2011
Posts: 304
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| Posted: Thu Sep 14, 2017 3:38 pm |
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Your subject is about a 18F46K22 but your include file is 18F46K80
Which are you using? |
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temtronic
Joined: 01 Jul 2010
Posts: 9250
Location: Greensville,Ontario
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| Posted: Thu Sep 14, 2017 4:07 pm |
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Any chance it's a hardware fault?
Pin not connected, pin shorted to ground, pin shorted to VDD,pin tied to pin next to it ??
Jay |
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newguy
Joined: 24 Jun 2004
Posts: 1911
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| Posted: Thu Sep 14, 2017 4:19 pm |
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No love. Reflowed the solder on the processor and that didn't do anything.
CCS cut me a special version of pch.dll as I found a weird HIGH interrupt issue not in 5.073 but definitely in 5.074. The new dll fixed that issue but I'm wondering if it didn't introduce something else? Anyway, I sent them the test program. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Sep 14, 2017 5:43 pm |
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I tried your program just now with a DIP-40 package of the 18F46K80
on a PicDem2-Plus board and it worked. I jumpered pin C2 to pin B0
because there's an LED on that pin, and it's blinking the LED at a 2 Hz rate.
I used a Pickit3 programmer.
MPLAB vs. 8.92 reports:
| Quote: | | Device ID Revision = 00000002 |
According to pg 1 of the errata sheet, that corresponds to Silicon rev A2.
http://ww1.microchip.com/downloads/en/DeviceDoc/80000519M.pdf
The errata sheet says the current silicon rev is A6. So I have an older chip.
What silicon revision and package do you have ? |
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newguy
Joined: 24 Jun 2004
Posts: 1911
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| Posted: Thu Sep 14, 2017 8:05 pm |
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Thanks PCM. 44 pin TQFP. Not sure of the revision, will check tomorrow.
I'm wondering if my installation is corrupt? I remember several other people here have reported really weird things over the years only to have them resolved by doing a clean install. We outsource our IT to an outside company and I noticed yesterday my antivirus was reporting it was out of date, then it disappeared, then it reappeared later in the day - up to date at that. They were definitely monkeying around remotely. First thing tomorrow I'm going to try uninstalling & reinstalling. Literally at the end of my rope. A clean install can't hurt.
Come to think of it, I also hooked up a brand new ICD-U80 today. I was using my own personal ICD-U64, but I told my employer that I really needed it back home. Coworker asked me if I wanted an '80, but I told him no, a '64 would suffice. He bought the 80 anyway. It installed okay, but I did notice that CCSLoad seemed to lose USB connection with it from time to time. Coworker was away today - the 80 is now on his desk and his 64 is on mine. He bought it, he can have it. He never uses it anyway. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Sep 14, 2017 9:10 pm |
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Here is my .Hex file. You can try it.
| Code: |
:1000000018EF00F0EA6A050EE96EEF50D8B417EF6A
:1000100000F0140E016E006A002EFED7012EFBD7F1
:10002000BF0E006E002EFED700D0EF2EF2D71200CA
:10003000F86AD09E046AA786820EAF6E060E7D6EA9
:10004000A60EAC6E900EAB6E0F015C51800B5C6F18
:10005000000E5D6FC196C198C19A5E6B5F6BCD6AF1
:10006000AA6AF00E5017946A8B6A800E946E949A66
:100070008B8A94988B8894968B8694948B84949294
:100080008B8294908B80FA0E056E0001BBDF949AF0
:100090008B9A94988B9894968B9694948B94949234
:1000A0008B9294908B90FA0E056EACDF2D0EAD6E98
:0600B0000F01DDD7030083
:020000040030CA
:0E00000015D27E7C008991000FC00FE00F40EA
:00000001FF
;PIC18F46K80
;CRC=D58C CREATED="14-Sep-17 16:24" |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19559
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| Posted: Fri Sep 15, 2017 1:26 am |
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Take a different tack.
Program the pin as PWM2.
Test if you get an output.
if not, you have a hardware issue. Possibly a via under the chip that isn't connecting, or shorts somewhere it shouldn't. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Sep 15, 2017 5:51 am |
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| newguy wrote: | | 44 pin TQFP |
Carefully unsolder Pin C2 from its pad and lift it up. Do this under a
microscope. Heat the pin and use the tip of an Exacto knife to lift it off
the pad. Then use fine solderwick to clear out any solder that still
connects the pin to the pad.
Then put a scope probe lightly on the pin. My guess it that it probably
starts working. |
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newguy
Joined: 24 Jun 2004
Posts: 1911
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| Posted: Fri Sep 15, 2017 7:31 am |
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PCM: your .hex file worked. Thank you thank you thank you - that confirmed what I suspected: that my installation somehow got corrupted or was corrupted.
I uninstalled 5.074 and did a clean install. I also copied over the separate pch.dll that CCS sent me a couple of weeks ago. Recompiled & flashed the chip and I can now toggle C2 with a hex file that I created. Couldn't do that yesterday.
PCM, I know I've said this before, but not only do I owe you a beer, I think I owe you a case of beer by now. |
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