topic Re: View Debug Time in LPCXpresso IDE

View Debug Time

lpcware — Wed, 15 Jun 2016 21:43:40 GMT

Content originally posted in LPCWare by thangle0110 on Wed Oct 30 19:52:55 MST 2013
Hi all!
Now i'm using tool LPCXpresso v5.2.6_2137. And I want to know exactly the time how long the code runs between two debug break.
Can someone show me how to set the time view in LPCXpresso tool.
Thanks all

Re: View Debug Time

lpcware — Wed, 15 Jun 2016 21:43:40 GMT

Content originally posted in LPCWare by TheFallGuy on Wed Oct 30 19:58:00 MST 2013
The cycledelta register (in the register view) shows the number of cycles between breakpoints. The cycle register shows the total number of cycles. It is up to you to convert cycles into time (by multiplying by the clock frequency).

Re: View Debug Time

lpcware — Wed, 15 Jun 2016 21:43:41 GMT

Content originally posted in LPCWare by R2D2 on Thu Oct 31 01:32:36 MST 2013
Several MCUs (like M3) have a 'Data Watchpoint and Trace Unit' :)

So you can read the clock cycles register(DWT->CYCCNT) in your program, divide it to something useful and print it.
That's very convenient.

Note: These registers are some of the forgotten registers in LPCXpresso-CMSIS3.0. In CMSIS 3.20 (LPCXpresso6) there are available.

So updating could be a good idea...

See also: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0337i/BABJFFGJ.html