MIMXRT1060 FlexRAM adjustment and debug

[shu-liu1314]

Hi,

1. We are working on a project based on the sample_azure_iot_embedded_sdk_adu project of MIMXRT1060. Our board is MIMXRT1060-EVK. https://github.com/azure-rtos/samples/releases/download/rel_6.1_adu_beta/Azure_RTOS_6.1_ADU_MIMXRT1060_MCUXpresso_Sample_2021_03_02.zip

2. We followed the instructions below and tried to increase the SDRAM_DTC from 128KB to 256KB by decreasing the OC_SDRAM. The GPR17 register value is set to 0x5AAFFAA5. https://community.nxp.com/t5/i-MX-RT-Knowledge-Base/Reallocating-the-FlexRAM/ta-p/1117649

3. The issue is that when debugging, heap and stack usage seem normal, but it fails at HardFault_Handler when triggering memory related functions, like malloc and srand. Attached is the connection script that we use for debugging and the default hard-coded linker script used by the project(moved the stack from end to start).

Thanks, Face connect_debug.txt MIMXRT1062xxxxx_flexspi_nor_ota.txt

[Tim-Wang38]

Hi, Do you modify the MPU configuration to adapt the modification of flexram?

[shu-liu1314]

Yes, I did. For RT1060, there are 512KB reserved for SRAM_OC.

/* Region 4 setting: Memory with Normal type, not shareable, outer/inner write back */
MPU->RBAR = ARM_MPU_RBAR(4, 0x00000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_128KB);

/* Region 5 setting: Memory with Normal type, not shareable, outer/inner write back */
MPU->RBAR = ARM_MPU_RBAR(5, 0x20000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_256KB);

/* Region 6 setting: Memory with Normal type, not shareable, outer/inner write back */
MPU->RBAR = ARM_MPU_RBAR(6, 0x20200000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_512KB);

/* Region 7 setting: Memory with Normal type, not shareable, outer/inner write back */
MPU->RBAR = ARM_MPU_RBAR(7, 0x20280000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_128KB);

[goldscott]

Please contact NXP for help with this issue.

[Tim-Wang38]

Hi,

I've noticed that you set the heap to the SDRAM, did you enable the macro 'XIP_BOOT_HEADER_DCD_ENABLE' in the predefine configuration?

[shu-liu1314]

Hi,

I've noticed that you set the heap to the SDRAM, did you enable the macro 'XIP_BOOT_HEADER_DCD_ENABLE' in the predefine configuration?

Yes I did try to set it to 1. Program still failed at the HardFault_Handler().

[shu-liu1314]

I found that I might need to change the RAM/Boot sections in the ADU project's hardcoded linker file. I tried to compared the auto-generated and hardcoded linker files(attached), but I could not understand much. Can you please take a look at them and see if there are any problems?

MIMXRT1062xxxxx_flexspi_nor_ota.txt sample_azure_iot_embedded_sdk_adu_OTA_Debug.txt sample_azure_iot_embedded_sdk_adu_OTA_Debug_library.txt sample_azure_iot_embedded_sdk_adu_OTA_Debug_memory.txt

[ghost]

Please contact NXP for help with this issue.

Hi Scott,

i forwarded this issue to @Tim-Wang38 who comes from NXP.

[goldscott]

Thank you @Tim-Wang38 for helping! I didn't realize you were from NXP. @faceface1234 - have you resolved this issue?

[shu-liu1314]

Scott,

We use another board instead.

Face

On Tue, Sep 6, 2022 at 6:34 PM Scott Larson @.***> wrote:

Thank you @Tim-Wang38 https://github.com/Tim-Wang38 for helping! I didn't realize you were from NXP. @faceface1234 https://github.com/faceface1234 - have you resolved this issue?

— Reply to this email directly, view it on GitHub https://github.com/azure-rtos/samples/issues/27#issuecomment-1238750280, or unsubscribe https://github.com/notifications/unsubscribe-auth/AGYLLIRFMD7NDHKIPZQJC6LV47IIRANCNFSM5DLAHGNQ . You are receiving this because you were mentioned.Message ID: @.***>

-- Thanks, Shu Liu