RT1052 FlexRAM and JLink

jordanwagner — Fri, 03 Aug 2018 22:30:50 GMT

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

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

Re: RT1052 FlexRAM and JLink

igorpadykov — Tue, 07 Aug 2018 23:11:40 GMT

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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i.MX RT Crossover MCUsのトピックRe: RT1052 FlexRAM and JLink

RT1052 FlexRAM and JLink

Re: RT1052 FlexRAM and JLink