MQX Memory Direct Access ISSUE

sunghokim — Tue, 24 Mar 2015 09:12:49 GMT

Hi, This is Sungho from South Korea.

I`m using 'i.mx6sx-sdb' board to build some application with PURE MQX BSP/PSP library(with no config modifications).

I`m wondering why Direct Memory Accessing to peripherals makes 'MQX_AUTO_START_TASK' attributed Task stop...(may jumped to some exception handler...)

I didn`t set MQX_ENABLE_USER_MODE <= this #define when copmpiled with bsp.a/psp.a

Is this MPU related issue? or Privileged Mode related issue? or RDC issue? or Clock Source Configure issue? :smileysad:

Memory Access Code is like this........reg = *(uint32_t *)0x020A8000;

Regarding MPU and Privileged Mode,

I searched all the BSP code but could not find the MPU configuration section.

Need a Help...please

Any replies will be appreciated.

Thanks.

Re: MQX Memory Direct Access ISSUE

alejandrolozan1 — Mon, 30 Mar 2015 21:10:05 GMT

Hi,

I just want to double check. Do all the memory regions generate this problem?

After cheking the 0x020A_8000 address

"0x0080_0000-0x0fff_ffff 248 0x8080_0000 Reserved CM4 DDR code alias"

It seems to be resereve for the Cortex-A5.

Best Regards,

Alejandro