使用imxrt1052 pro开发板调试rt-thread官方例程SDRAM的问题

cema2018

在mdk下，使用官方rt-thread例程：14、创建多线程（SRAM静态内存），若配置为内部ram即：nor_txt_ram，编译、下载 、执行一切正常。但若选择配置为：nor_txt_sdram后，程序执行就反复重启打印*****欢迎使用 野火i.MX RT1052 开发板*****.分散加载 scf文件使用的是MIMRRT1052xxxxx_nor_txt_sdram.scf：
#! armcc -E
/*
** ###################################################################
**     Processors:          MIMXRT1052CVL5B
**                          MIMXRT1052DVL6B
**
**     Compiler:            Keil ARM C/C++ Compiler
**     Reference manual:    IMXRT1050RM Rev.1, 03/2018
**     Version:             rev. 0.1, 2017-01-10
**     Build:               b180131
**
**     Abstract:
**         Linker file for the Keil ARM C/C++ Compiler
**
**     The Clear BSD License
**     Copyright 2016 Freescale Semiconductor, Inc.
**     Copyright 2016-2018 NXP
**     All rights reserved.
**
**     Redistribution and use in source and binary forms, with or without
**     modification, are permitted (subject to the limitations in the
**     disclaimer below) provided that the following conditions are met:
**
**     * Redistributions of source code must retain the above copyright
**       notice, this list of conditions and the following disclaimer.
**
**     * Redistributions in binary form must reproduce the above copyright
**       notice, this list of conditions and the following disclaimer in the
**       documentation and/or other materials provided with the distribution.
**
**     * Neither the name of the copyright holder nor the names of its
**       contributors may be used to endorse or promote products derived from
**       this software without specific prior written permission.
**
**     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
**     GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
**     HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
**     WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
**     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
**     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
**     LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
**     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
**     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
**     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
**     WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
**     OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
**     IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
**     http:                 www.nxp.com
**     mail:                 support@nxp.com
**
** ###################################################################
*/

#define m_flash_config_start           0x60000000
#define m_flash_config_size            0x00001000

#define m_ivt_start                    0x60001000
#define m_ivt_size                     0x00001000

#define m_interrupts_start             0x60002000
#define m_interrupts_size              0x00000400

#define m_text_start                   0x60002400
#define m_text_size                    0x03FFDC00

#define m_data_start                   0x80000000
#define m_data_size                    0x01E00000

#define m_ncache_start                 0x81E00000
#define m_ncache_size                  0x00200000

#define m_data2_start                  0x20000000
#define m_data2_size                   0x00020000

#define m_data3_start                  0x20200000
#define m_data3_size                   0x00040000

/* Sizes */
#if (defined(__stack_size__))
  #define Stack_Size                   __stack_size__
#else
  #define Stack_Size                   0x0400
#endif

#if (defined(__heap_size__))
  #define Heap_Size                    __heap_size__
#else
  #define Heap_Size                    0x0400
#endif

LR_m_rom_config m_flash_config_start m_flash_config_size {   ; load region size_region
    RW_m_config_text m_flash_config_start m_flash_config_size { ; load address = execution address
    * (.boot_hdr.conf, +FIRST)
    }
}

LR_m_rom_ivt m_ivt_start m_ivt_size {   ; load region size_region
    RW_m_ivt_text m_ivt_start m_ivt_size { ; load address = execution address
    * (.boot_hdr.ivt, +FIRST)
    * (.boot_hdr.boot_data)
    * (.boot_hdr.dcd_data)
    }
}

LR_m_text m_interrupts_start m_text_start+m_text_size-m_interrupts_size {   ; load region size_region
  VECTOR_ROM m_interrupts_start m_interrupts_size { ; load address = execution address
    * (RESET,+FIRST)
  }
  ER_m_text m_text_start m_text_size { ; load address = execution address
    * (InRoot$$Sections)
    .ANY (+RO)
  }
  RW_m_data m_data_start m_data_size-Stack_Size-Heap_Size { ; RW data
    .ANY (+RW +ZI)
    *(m_usb_dma_init_data)
    *(m_usb_dma_noninit_data)
  }
  ARM_LIB_HEAP +0 EMPTY Heap_Size {    ; Heap region growing up
  }
  ARM_LIB_STACK m_data_start+m_data_size EMPTY -Stack_Size { ; Stack region growing down
  }
  RW_m_ncache m_ncache_start m_ncache_size { ; ncache RW data
    * (NonCacheable.init)
    * (NonCacheable)
  }
}

MDK配置啥的都使用官方配置，没做任何改动。在论坛里也看到了有人出现了这样的问题，但看起来他们并没有运行官方的提供的rt-thread例程。也从github上下载 了rt-thread 关于imxrt1052-fire-pro的代码 ，但github上也是将程序放在ram中执行的。如果配置为nor_txt_sdram现象也一样。因此，怀疑是不是硬件上需要做什么配置之类的工作。不然，不太可能运行官方例程都无法工作。