Hi guys,
I just committed:
Log: Added sample of temperature controlled PC case fan.
Using a 12hv615 with single 12V DC power supply,
a TC77 or LM74 temperature sensor and
variable temperature dependent PWM duty cycle.
This is the debugged and tested version.
In my PC I'm currently running a version with debug code, using the
serial_software library. This resulted at first in 'Out of data space'.
Unfortunately the compiler doesn't report how much more memory would be
needed. But I remembered a recent discussion about declaring 'shared'
memory as 'non-shared' and I thought to simply try this trick to see if
the debug code could remain.
The device file specifies:
pragma data 0x40-0x6F
pragma shared 0x70-0x7F
--
var volatile byte _pic_accum shared at 0x7E -- (compiler)
var volatile byte _pic_isr_w shared at 0x7F -- (compiler)
Since the compiler needs these last 2 bytes as shared memory, I changed
the first 2 lines into:
pragma data 0x40-0x7D
pragma shared 0x7E-0x7F
And now the compiler succeeds and reports:
Data area: 57 of 62 bytes used.
So the trick works not only in theory!
Regards, Rob.
--
R. Hamerling, Netherlands --- http://www.robh.nl
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