1 Debugging and ATMELStudio

https://www.youtube.com/watch?v=wQZKWgnmvQ8

(kner2020)

Table of Contents

 

1.1 New Project

Image1Select your Processor (e.g. Atmega328p)

Properties

Menu //Project/Properties

 

Toolchain

Image2

Simulator

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1.2 Debug Windows

Watch

Shows Variables, Add Watch to control value and address
Edit in Watch Window to output in various formats e.g. PINB,d  to display char* text1 = ″Hallo″; use   text1, s in Watch window

Image4

IO

Shows IO Devices
Add multiple IO devices by CTRL+Click

Processor Status

Shows Registers and Processor Cycles/Stopwatch
Dialog to control simulation clock frequency
Reset stopwatch/cycle counter (right click)

Memory

Display and Edit Memory Content

Disassembly

Display OpCode

1.3 Debug Commands

1.4 Breakpoints and Tracepoints

Breakpoint

Start Debugging and Break
Breakpoint/Insert Breakpoint/Toggle Breakpoint or Double Click on left gray window frame

Conditional Breakpoint

set a condition and display a message when breakpoint was hit
stop execution

Tracepoint

set a message when tracepoint was hit
continue execution; needed to trace program execution (wherever I've been)

Data Breakpoint

use a static variable (heap address) and monitor its state; control number of hits of this breakpoint by right click on the databreakpoint

1.5 Stimulifile

A stimuli file (name.stim) is used to change PIN inputs, log information und stop execution automatically.

Set Stimulus File and execute it

1. Set Stimulus File in Project/Preferences

2. //Debug/Start Debugging and Break

3. //Debug/Execute Stimulifile

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Stimulifile example

Example 1

//sets port B, waits 20 cycle and stops execution – resum it

$repeat 2000000
   PINB = 0
   #20
$break
   PINB = 0xff
   #20
$break
$endrep

 

Example 2

write a logfile

 

$log PORTB
$log PINB
$log SP
$startlog logfile.stim
$reset
PINB = 0x55
#10
PORTB = 0x99
#10
$break
PORTB |= 0xFF
#10
$stoplog
$break

 

 

1.6 Conditional Compiling

Another method for debugging is the use of a display/serial port and conditional compiling. The symbol DEBUG is set automatically when in Debug perspective.

#ifdef DEBUG

Serial.write(x);

#endif