MCU-PLUS-SDK-AM243X: Setting R5F to Single-core

Felix Heil

Hello,

we use a sinlge-core application on AM243x and thus do not need the other R5Fs. As I saw in the TRM we can then use 64 KB per each TCM.

But for that the CTRLMMR_SEC_CLSTR0_CFG-register needs to be set accordingly.

I can't find the use of this in the SDK. I also checked the corresponding register in memory view in CCS but it just tells 0 and I'm not sure I see the correct value.

So if I want 1. to debug an built elf and 2. later on also want to generate an bootable image with out2rprc and the multicoreImageGen, how do I assure the core is running in single-mode and so the whole 64 KB for TCMA and the 64 KB for TCMB are available?

I can tell it in the linker script a bigger size but if the place is occupied above 32 KB I cannot load the application into CCS. I may think this is fixable with some js- or gel-files but even if: how about a built multicore-app-image with the TI-Tools?

Best regards

Felix

over 3 years ago

0 Prasad Jondhale over 3 years ago

TI__Mastermind 27743 points

Hi Felix,

Till the expert comments on AM243x specific config, can you please check if point 2 in below helps?

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1118671/am2634-how-to-enable-r5f0-0-r5f0-1-with-qspi-boot-mode/4146851#4146851

Regards,

Prasad

0 Sri Vidya Gunturi over 3 years ago in reply to Prasad Jondhale

TI__Expert 7586 points

Hi Felix

You need to configure the gel ( location: ccs\ccs_base\emulation\gel\AM243x\AM243x.gel ) file into Lock Step Mode. By default, your device is set into split mode. I will try to get more information on this soon.

Regards

Sri Vidya

+1 Sri Vidya Gunturi over 3 years ago in reply to Sri Vidya Gunturi

TI__Expert 7586 points

Hi Felix

To use 128 KB TCM in am243x single, the following steps can be followed:

1) Your Linker File needs to be updated to add the 64KB TCMA, 32 KB TCMB0 and 32KB TCMB1 (total 128KB TCM).

you can increase the TCMA and TCMB length in the linker script and the lockstep core will automatically take it up as 128KB TCM.

2) Your "MPU ARMv7” region settings: Region Size for TCMA and TCMB needs to be increased to 64KB.

3) In source/drivers/bootloader/soc/am64x_am243x/bootloader_soc.c, add the macro to configure single core as shown below:

proc_set_config.config_flags_1_set |= (TISCI_MSG_VAL_PROC_BOOT_CFG_FLAG_R5_BTCM_EN |TISCI_MSG_VAL_PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE);

TISCI_MSG_VAL_PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE |

TISCI_MSG_VAL_PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE );

Build the libraries before flashing the bootloader.

https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_02_00_31/exports/docs/api_guide_am243x/EXAMPLES_DRIVERS_SBL_OSPI.html

4) To test the single core configuration you can use this API: SOC_isR5FDualCoreMode

location: source\drivers\soc\am64x_am243x\soc.c

Regards

Sri Vidya

0 Sri Vidya Gunturi over 3 years ago in reply to Sri Vidya Gunturi

TI__Expert 7586 points

Hi Felix

Currently, there is no provision to change the configuration to Dual core in \AM243x.gel file. As explained above, it can configured through the sbl-qspi.

Regards

Sri Vidya

Arm-based microcontrollers

Arm-based microcontrollers forum

MCU-PLUS-SDK-AM243X: Setting R5F to Single-core