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nurquhar
Joined: 05 Aug 2006
Posts: 149
Location: Redditch, UK
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| disable_interrupts(INT_RA5) does not work, CCS bug ? |
 Posted: Tue Jul 26, 2011 8:35 am |
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CCS PCM C Compiler, Version 4.123
#device PIC12F1822
Am I reading this disassembly correctly ? 
The enable_interrupts(INT_RA5) seems to generate sensible and working code to twiddle with INTCON (38Bh), IOCAP (391h) & IOCAN (392h) registers.
However the disable_interrupts(INT_RA5) code does not seem to stop the interrupt occuring in my test app and also CCS appears to generating irrational code. ie CCS is trying to reset bit 5 in registers (394h) & (395h), which according to datasheet are not mapped to anything 
Should CCS support be looking at this
| Code: | 237:
238: enable_interrupts(INT_RA5) ;
7AE 158B BSF 0xb, 0x3
7AF 0027 MOVLB 0x7
7B0 1691 BSF 0x11, 0x5
7B1 1692 BSF 0x12, 0x5
239: enable_interrupts(INT_TIMER1) ;
7B2 0021 MOVLB 0x1
7B3 1411 BSF 0x11, 0
240: // enable_interrupts(GLOBAL) ;
241: } else {
7B4 2FBB GOTO 0x7bb
7B5 0020 MOVLB 0
242: // disable_interrupts(GLOBAL) ;
243: disable_interrupts(INT_RA5) ;
7B6 0027 MOVLB 0x7
7B7 1294 BCF 0x14, 0x5
7B8 1295 BCF 0x15, 0x5
244: disable_interrupts(INT_TIMER1) ;
7B9 0021 MOVLB 0x1
7BA 1011 BCF 0x11, 0
7BB 0020 MOVLB 0 |
Revision Edit
Some further testing shows this works, ie the reverser of the enable ints.
| Code: | 242: // disable_interrupts(INT_RA5) ;
243: bit_clear(INTCON,3) ;
7B6 118B BCF 0xb, 0x3
244: bit_clear(IOCAP,5) ;
7B7 0027 MOVLB 0x7
7B8 1291 BCF 0x11, 0x5
245: bit_clear(IOCAN,5) ;
7B9 1292 BCF 0x12, 0x5 |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19334
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| Posted: Tue Jul 26, 2011 11:52 am |
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Look at this thread:
<http://www.ccsinfo.com/forum/viewtopic.php?t=45889>
Note my comment at the end.
Others have also seen this (PCM programmer for example).
There are similar problems on some other chips.
It has been reported to CCS, but the more people who do so, the higher the likelyhood that they may fix it.
Best Wishes |
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nurquhar
Joined: 05 Aug 2006
Posts: 149
Location: Redditch, UK
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| Posted: Wed Jul 27, 2011 1:40 am |
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| I have emailed support with this bug and also referenced this thread. So hopefully it will appear on somebodys "todo" list at CCS. |
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