RT1052 FlexRAM and JLink

[jordanwagner]

I'm configuring the FlexRAM on our chip to all 16 banks of OCRAM by writing to the IOMUXC_GPR registers in the startup code.  This successfully flashes over JLink and runs.  However, when trying to flash again, I must now hold reset on the device before JLink can download the new file.  What is causing this?  Does JLink need some DTCM or ITCM memory?

JLink output:

Downloading file [./build/debug/image.hex]...

****** Error: Failed to prepare for programming.

Could not preserve target memory.

Error while determining flash info (Bank @ 0x60000000)

Unspecified error -1

Register writes:

IOMUXC_GPR_GPR17 = 0x55555555   // Set all banks to OCRAM

IOMUXC_GPR_GPR16 &= ~0x3    // Disable ITCM and DTCM

IOMUXC_GPR_GPR16 |= 0x4    // Set FlexRAM Allocation to BankCfg

[igorpadykov]

Hi Jordan

from log seems it needs some DTCM or ITCM, however since JLink

is developed and supported by segger proper way to post this on vendor support forum:

SEGGER - Support Wiki 

Best regards
igor
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