i.MX RT Crossover MCUsのトピックRe: When program link to sdram, download failed

When program link to sdram, download failed

huijieshen — Tue, 15 Dec 2020 08:51:08 GMT

Dear :

I use MCUExpresso which run Linux to debug my RT1052 board. I use on DAPlink to connect my linux computer to the RT1050 board. The problem is as followings:

I can download the my program to RT1052 when I link the code to FlexRAM D-TCM. And I can also debug my code in this case.

But when I link the code to SDRAM, I downloaded the code to the board, no error reported. But the code doesn't work at all. Of couse I can't debug use the DAPLink yet.

I think the problem may lies in the SDRAM is not initialed. (? Am I correct) . So I try to merge the dcd.c register contents to RT1052_connect.scp. But When I read the dcd. I find it seems that the dcd.c is not just register writing. I can't know code means like

/* #8, command: check_any_bit_set, address: SEMC_INTR, value: 0x01, size: 4 */
0xCF, 0x00, 0x0C, 0x1C, 0x40, 0x2F, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x01,

So I think I need help to make me success in downloading code to RT1052 SDRAM.

Best Regards

Re: When program link to sdram, download failed

jingpan — Thu, 17 Dec 2020 06:02:00 GMT

Hi huijieshen,

Please refer to this link.

https://community.nxp.com/t5/i-MX-RT/RT1020-SDRAM-and-SWD-debugging-problems/m-p/1057852

Regards,

Jing

Re: When program link to sdram, download failed

huijieshen — Fri, 18 Dec 2020 09:33:31 GMT

Thank you for your information.

The problem is that I use RT1052 instead of RT1020 so the 1020 connect script is unusable to me.

Some time I can download the code to SDRAM, but when the code runs, the hardware fault will bounce out of the IDE. It will says I will try to access memory address such as 0xfffffffe. So I think the main reason should be in SDRAM is not initialed, So I need a way of transform dcd to connect script.

I need to know how to process the things as following when I writing connect script :

/* #2, command: check_any_bit_set, address: SEMC_INTR, value: 0x01, size: 4 */
0xCF, 0x00, 0x0C, 0x1C, 0x40, 0x2F, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x01,

can I just ignore them.

Best Regards

Re: When program link to sdram, download failed

jingpan — Mon, 21 Dec 2020 02:45:18 GMT

Hi huijieshen,

There is a RT1050_SDRAM_init.scp. You can download from here.

https://community.nxp.com/t5/MCUXpresso-Community-Articles/Overview-of-using-the-MIMXRT1050-EVK-B-with-MCUXpresso-IDE/ba-p/1131013

Regards,

Jing