CCS/LAUNCHXL-F28379D: CPU2 not booting from flash after reset

Anup Thapa

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: C2000WARE

Tool/software: Code Composer Studio

I have the code working great on debug mode. I have the Red and Blue led controlled and toggled from either CPU and this works great. I have used IPC _Flag5 to have CPU1 wait until CPU2 is ready, and while CPU1 is waiting it blinks the led at a higher speed (this lets me know that cpu1 is waiting for cpu2). Everything works great in debug mode.

However, when I reset the controller I see that the blue led blinks at a high speed indicating CPU1 has booted from flash and is waiting for CPU2 to acknowledge IPC_Flag5. This suggests that CPU1 has successfully loaded from Flash but CPU2 did not.

I suspect that there is a setting somewhere to redirect CPU2 to boot from flash. Can someone please point me to a document that goes through the full process for CPU2 boot from Flash?

I have a good understanding of how to boot CPU1 (or another single core C2000 uC) from Flash, however I am new to dual_cpu applications. I suspect there is an additional step for CPU2 that I am missing.

For CPU2 I have - used the correct Flash.cmd command file, defined _FLASH macro, used memcpy() to mode code from flash to ram,(... pretty much everything needed to run a C2000 controller from Flash)

Any pointers would be greatly appreciated.

Thank you!

over 5 years ago

0 Vamsi Gudivada over 5 years ago

TI__Guru* 87155 points

Hi,

Please check below code snippet in C2000Ware_3_02_00_00\device_support\f2837xd\examples\dual\ipc_gpio_toggle\cpu01\ipc_gpio_toggle_cpu01.c

Thanks and regards,
Vamsi

#ifdef _STANDALONE
#ifdef _FLASH
//
// Send boot command to allow the CPU2 application to begin execution
//
IPCBootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_FLASH);
#else
//
// Send boot command to allow the CPU2 application to begin execution
//
IPCBootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_RAM);
#endif
#endif

0 Anup Thapa over 5 years ago in reply to Vamsi Gudivada

Prodigy 180 points

Hi Vamsi,

Thanks for responding. I tried copy pasting the code to main.c in CPU1, but that did not work.

Do you have further information on what the code snippet does and how to use it?

0 Vamsi Gudivada over 5 years ago in reply to Anup Thapa

TI__Guru* 87155 points

Hi Bhat,

Did you define the _STANDALONE in your project's predefined symbols (please check build settings)?

This IPC command instructs CPU2 to boot from Flash.

Please go through the ROM Code and Peripheral Booting chapter in TRM https://www.ti.com/lit/ug/spruhm8h/spruhm8h.pdf

Thanks and regards,

Vamsi

0 Anup Thapa over 5 years ago in reply to Vamsi Gudivada

Prodigy 180 points

This worked. However, I am not sure why it works. Hoping to understand what this code does and why.

Thanks for your prompt response.

0 Vamsi Gudivada over 5 years ago in reply to Anup Thapa

TI__Guru* 87155 points

Hi Bhat,

After the CPU2 bootROM execution, it will enter idle mode and waits for CPU1 to instruct what it has to do. With above IPC command, your are sending the boot to flash command from CPU1 to CPU2.

When debugger is connected, CCS will set the PC to the application start address and hence you won't see this issue.

Thanks and regards,
Vamsi

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CCS/LAUNCHXL-F28379D: CPU2 not booting from flash after reset