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bolubeyi
Joined: 27 Apr 2012
Posts: 15
Location: TURKEY
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| 18f67k22 port c (c0 c1) io setup |
 Posted: Sat May 05, 2012 5:55 am |
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hi, I don't control 18f67k22 rc0 and rc1 pins.
"If a secondary oscillator is not desired and digital I/O on
port pins, RC0 and RC1, is needed, the SOSCSEL bits
must be set to Digital mode.", write on datasheet.
I want to use RC1 for pwm. I use CCS C. How can I do this? |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19504
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| Posted: Sat May 05, 2012 7:05 am |
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Same story for this type of thing all the time.
Start by opening the .h file for the processor. At the top, there is a list of supported fuses.
Look at this, for 'SOSC'.
You then find three entries:
"SOSC_LOW,SOSC_DIG,SOSC_HIGH"
If you look at the data sheet, the three settings for the SOSCSEL bits are:
| Code: |
bit 4-3 SOSCSEL<1:0>: SOSC Power Selection and Mode Configuration bits
11 = High-power SOSC circuit is selected
10 = Digital (SCLKI) mode; I/O port functionality of RC0 and RC1 is enabled
01 = Low-power SOSC circuit is selected
00 = Reserved
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Only three possibilities, and three CCS settings - makes sense.
Also (hopefully) fairly obvious which one you need.
Best Wishes |
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