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temtronic
Joined: 01 Jul 2010
Posts: 9161
Location: Greensville,Ontario
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| PIC18F4550 fuse - hello world |
 Posted: Fri Sep 23, 2011 5:32 am |
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Maybe you can teach an old dog new tricks? I'm thinking of migrating to the PIC18F4550 as it's cheaper, faster, more powerful than the PIC16F877 I've used for the past 2 decades. But, like others I'm confused about the FUSES options. I want to stay using an external 20MHz xtal. Could someone post a FUSES list that works? I haven't got the right combination as the RS232 to PC is 'off'.
No USB is need, that's for the future...maybe.
Thanks. |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Fri Sep 23, 2011 8:14 am |
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My first use of the 18f family was with an 18f4520 and i had trouble making the USART work too.
I use fast_io () on ALL Ports all the time in all programs.
(just my a n a l retentive side i guess)
Adding this to my init routine fixed my problem back then
with compiler ver 4.085
| Code: |
#bit spen = 0xFAB.7
set_tris_c ( 0b11000011 ); // 00000011 C0,C1 are inputs
spen=1; // for usart
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BTW you did not post your fuses that you used - so i cant see if i think any of them are a problem either. |
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temtronic
Joined: 01 Jul 2010
Posts: 9161
Location: Greensville,Ontario
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| Posted: Fri Sep 23, 2011 10:47 am |
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[solved]...whew....
turns out I need HS NOT HSPLL to make my PIC run 'right'...
Too many fuses for old guys like me to figure out !!!
Progress though...one small step.... |
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