How to resize ITCM,DTCM when code is reside in ITCM

[binhu]

Here we we want the ROM to move code from flexispi flash into the ITCM and run, but before that want to enlarge the ICTM size( repartition the flexram). Can we access this by using the DCD code in the image head?

[igorpadykov · Accepted solution]

Hi Hu

yes this should be possible using the DCD code, as it is configured by

IOMUXC_GPR_GPR17 register and described in AN12077 Using the i.MX RT FlexRAM
https://www.nxp.com/docs/en/application-note/AN12077.pdf

Also this may be configured with fuse Default_FlexRAM_Part - Default FlexRAM RAM bank partioning

described in Table 5-9. Fusemap Descriptions i.MXRT1050 Reference Manual.

Best regards
igor
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[mjbcswitzerland]

Hi

Use of DCD is explicitly advised against in the NXP application note!

Regards

Mark

[uTasker project developer for Kinetis and i.MX RT]

[binhu]

Hi igor,

      Thank you very much! But next question is how can I generate the dcd file by my self? It look like the SDK does not provide any tools to generate the dcd.bin file form source code. By the way , can I generate this dcd.bin file from the XIP code file evkimixrt1020_sdram_ini_dcd.c?

[igorpadykov]

Hi Hu

for new questions please create new thread.

Best regards
igor