Debugger displays incorrect Timer0 values

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Ian Stroud on Tue Mar 22 05:41:43 MST 2011
I have a project running on the LPC1768 on lpcxpresso 3.6.2.
In trying to debug Timer0 interrupts I noticed that the reported values for MR0, MR1, MR2 and MR3 were not as I expected.
They should have been written as 101 (decimal) but were being displayed as 0x41.

I checked the assembler and the correct values were being written to Timer0 but the debug display was wrong.

I then, via the debugger, manually set one of the MR registers to 100. When I pressed enter the display shows 0x40, not 0x64 as I would expect. Curiously 64 as decimal is 0x40. Clearly I can't trust anything the debugger tells me about the contents of Timer 0.

Directly view the Timer via a memory pane shows the MR0-3 locations to have the correct values as programmed / manually entered it is just the Timer0 register display that gets them wrong.