[FAQ] AM263P4: How to debug XiP application in AM263PX

1. For enabling XIP application refer: [FAQ] AM263P4: Enabling XIP in AM263PX - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

2. NOTE:

This FAQ scopes debugging XiP application for two most commonly used boot modes i.e. Dev Boot Mode (preferred for development) and OSPI Boot Mode (preferred for production).

Dev Boot Mode: Step3, Step4, Step5, Step6, Step7, Step8
OSPI Boot Mode: Step3, Step4, Step5, Step9, Step10, Step11

3. Create a function for infinite loop (loop_forever):

void loop_forever(void){
    volatile uint8_t i=1;
    while(i);
}

4. Call loop_forever function after start of main function. This will only work for debugging "after main".

5. Build example after enabling XIP and adding infinite loop using above steps.

• Open Project explorer.
• Right Click on project name.
• Select "Build Project" to build it.

6. Target Configurations for debugging XIP in DEV boot mode

• For debugging XIP in dev boot mode target configurations should consists of GEL configurations.
• Go-to 'View' → 'Target Configurations'.
  
• Select 'New Target Configurations'
  
• Double click on newly added 'am263px_dev.ccxml' to open it.
• Select Connection as 'Texas Instruments XDS110 USB Debug Probe' and Device as 'AM263Px'. 
  
• Save Configurations.

7. Debugging XIP in DEV boot mode

• Connect device in DEV bootmode.
• Launch Target configuration for DEV bootmode ('am263px_dev.ccxml').
  
• Connect Target.
• To flash program image: Go-to "Run"→ "Load" → "Load Program".
  
• Select generated .out image for XIP application in Step5.
  
• Click "Resume"

8. Pause program 

• You program will be looping at infinite while loop.
• Click Pause.
• Add 'Hardware breakpoint' in your program at required positions.
• Go-to 'View' → 'Variable'.
  
  
• In 'Variables' window you can see 'i' with variable value as '1'.
• Update value of variable i of while loop as i!=1.
  
• Click 'Resume' 
• After resuming, it will exit the while loop and now you can debug the program using breakpoints

9. Target Configurations for debugging XIP in OSPI boot mode

• For debugging XIP in ospi boot mode target configurations should not consists of GEL configurations.
• Go-to 'View' → 'Target Configurations'.
  
• Select 'New Target Configurations'.
  
• Double click on newly added 'am263px_ospi.ccxml' to open it.
• Select Connection as 'Texas Instruments XDS110 USB Debug Probe' and Device as 'AM263Px'. 
  
• Go-to 'Advanced Setup' → 'Target Configuration'.
  
• Select destination core (Cortex_R5_0).
  
• Go-to 'Cpu Properties' and make 'initialization script' as empty.
  
• Save Configurations.

10. Debugging XIP in OSPI boot mode

• Flash IMAGE
  • Connect device in UART bootmode. 
  • Open Uniflash tool.
  • Select Device as am263px (Serial).
    
  • Start session.  
  • Select images to be flashed.
    
  • Update COM Port and choose 'Load Images'.
  • On successful flashing Uniflash will print success logs.
• Chage device boot mode to OSPI boot mode ('am263px_ospi.ccxml').
• Launch Target configuration for OSPI boot mode ('am263px_ospi.ccxml').
  
• Connect Target.
• Go-to "Run" → "Load" → Select "Load symbols".
  
• Press Reset button on connected AM263px device.

11. Pause program

• You program will be looping at infinite while loop.
• Click Pause.
• Add 'Hardware breakpoint' in your program at required positions.
• Go-to 'View' → 'Variable'.
  
  
• In 'Variables' window you can see 'i' with variable value as '1'.
• Update value of variable i of while loop as i!=1.
  
• Click 'Resume' 
• After resuming, it will exit the while loop and now you can debug the program using breakpoints

Regards,
Gunjan