Lpc2000

I'm using the lpc2138:

Q. How do you read the clock registers without risk of 'rollover'?

For example, I know of clocks that have a dual-port ram between the
actual internal clock registers and the registers that appear in the
address space. You can disable/enable updating the dual-port ram,
thereby allowing the muliple clock registers to be read without risk
of 'rollover'.

As best as I can determine, there are bits that will start/stop the
lpc2138 clock. Are these really bits that enable/disable a dual port
ram, or does it really stop the clock?

It it really stops the clock then that is unfortunate.

A workaround is to run a sub-second timer routine that reads the
second counter, waiting for it to increment, then you can read the
rest of the consolidated registers without fear of rollover.

ebarker123