A follow up to my earlier post, I ran the soak test on Timer 1 overnight,
with the expected result.

First, I put this snippet of code in to read the timer twice.

do
{
v0.Bytes.Byte1=TMR1H;
v0.Bytes.Byte0=TMR1L;
v1.Bytes.Byte1=TMR1H;
v1.Bytes.Byte0=TMR1L;
if ( (v0.Bytes.Byte1 == v1.Bytes.Byte1) &&
(v0.Bytes.Byte0 > v1.Bytes.Byte0) )
{
putc('v');putc('0');putc('=');put_u16x(v0.Value);
putc(' ');
putc('v');putc('1');putc('=');put_u16x(v1.Value);
put_nl();
}
}
while (v0.Value != v1.Value);


A sample of output is:
v0=80FF v1=8000
v0=8CFF v1=8C00
v0=02FF v1=0200
v0=7EFF v1=7E00
v0=0A7F v1=0A40
v0=6CBF v1=6C80
v0=32FF v1=3200
v0=5FFF v1=5F00
v0=73FF v1=7300
v0=8BFF v1=8BC0

The xxFF xx00 are expected (asynchronous overflow from TMR1L into TMR1H) but
0A7F 0A40 and 6CBF 6C80 are not.

I'm going to read the timer three times to see if (a) the counter is shot,
or (b) the reading of it is, but is this a known problem?

T1CKI is running at 10 Hz, there are no long interrupt service routines, the
processor is running at 20 MHz.

Tia,
        Bill

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