i.MX RT Crossover MCUsのトピックRe: RT105x FlexRAM configuration

RT105x FlexRAM configuration

ffloree — Mon, 05 Mar 2018 05:13:15 GMT

Hi,

do you know how to configure FlexRAM as TCM or OCRAM?

I checked the RM, AN12077 and SDK source code, found that IOMUXC_GPR_GPR14->CM7_MX6RT_CFGDTCMSZ only could be set as below:

0000 0 KB (No DTCM)
0011 4 KB
0100 8 KB
0101 16 KB

0110 32 KB
0111 64 KB
1000 128 KB
1001 256 KB
1010 512 KB

so, if i want to set DTCM as 480KB, how to set?

or, can you provide an example of ITCM/DTCM/OCRAM setting in FUSE?

Thanks in advance!

Re: RT105x FlexRAM configuration

Yuri — Mon, 05 Mar 2018 08:32:21 GMT

Hello,

According to AN12077:
“The Arm Cortex-M7 specifications require the size of ITCM/DTCM to be

a power-of-two number, which can conflict with the FlexRAM

configuration capability. Avoid access to the empty RAM space

configured by the corresponding FlexRAM configuration.”

Customers can use IOMUXC_GPR_GPR17, as described in section 2.1.2
(Definition of the memory type size) of the app note.

Have a great day,
Yuri

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Re: RT105x FlexRAM configuration

ffloree — Tue, 06 Mar 2018 01:34:37 GMT

Thanks Yuri,

so i needn't to care ARM CM7 ITCM/DTCM setting requirement (power-of-two number),

just only need to set IOMUXC_GPR_GPR17 and IOMUXC_GPR_GPR16, right?

by the way, if you can provide an example of ITCM/DTCM/OCRAM settings in fuse, it'll be very helpful, do you have?

Thanks!

Re: RT105x FlexRAM configuration

Yuri — Tue, 06 Mar 2018 04:44:54 GMT

Hello,

Correct - "... needn't to care ARM CM7 ITCM/DTCM setting requirement (power-of-two number),

just only need to set IOMUXC_GPR_GPR17 and IOMUXC_GPR_GPR16..."

Customers can use the flashloader for fuse burning. Look at "i.MX MCU Manufacturing User's Guide.pdf"

in package documentation.

https://www.nxp.com/downloads/en/initialization-boot-device-driver-code-generation/Flashloader_i.MXRT1050_1.0_GA.zip

Let me remind, the fuses can be burned only once.

Regards,

Yuri.

Re: RT105x FlexRAM configuration

li-chinwang — Fri, 07 Sep 2018 01:38:59 GMT

I can't download example code. It shows page is not found.

https://www.nxp.com/downloads/en/initialization-boot-device-driver-code-generation/Flashloader_i.MXRT1050_1.0_GA.zip

Re: RT105x FlexRAM configuration

Yuri — Tue, 30 Oct 2018 03:53:12 GMT

Hello,

Use the following:

https://www.nxp.com/webapp/Download?colCode=IMX-RT1050-FLASHLOADER&appType=license&Parent_nodeId=1507661717567725431170&…

Regards,

Yuri.