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DSP 28335 在外部RAM中运行不正常问题

你好,

我现在想让我的代码全部在外部ram中运行,外部的ram使用的Zone7,CMD文件划分如下:

MEMORY
{
PAGE 0 :/* BEGIN is used for the "boot to SARAM" bootloader mode*/BEGIN: origin = 0x200000, length = 0x000002/* Boot to M0 will go here*/RAMM0: origin = 0x000050, length = 0x0003B0RAML0: origin = 0x008000, length = 0x001000RAML1: origin = 0x009000, length = 0x001000RAML2: origin = 0x00A000, length = 0x001000RAML3: origin = 0x00B000, length = 0x001000ZONE7A: origin = 0x200002, length = 0x018000/* XINTF zone 7 - program space */CSM_RSVD: origin = 0x33FF80, length = 0x000076/* Part of FLASHA.  Program with all 0x0000 when CSM is in use. */CSM_PWL: origin = 0x33FFF8, length = 0x000008/* Part of FLASHA.  CSM password locations in FLASHA*/ADC_CAL: origin = 0x380080, length = 0x000009RESET: origin = 0x3FFFC0, length = 0x000002IQTABLES: origin = 0x3FE000, length = 0x000b50IQTABLES2  : origin = 0x3FEB50, length = 0x00008cFPUTABLES  : origin = 0x3FEBDC, length = 0x0006A0BOOTROM: origin = 0x3FF27C, length = 0x000D44


PAGE 1 :BOOT_RSVD  : origin = 0x000002, length = 0x00004E/* Part of M0, BOOT rom will use this for stack */RAMM1: origin = 0x000400, length = 0x000400/* on-chip RAM block M1 */RAML4: origin = 0x00C000, length = 0x001000RAML5: origin = 0x00D000, length = 0x001000RAML6: origin = 0x00E000, length = 0x001000RAML7: origin = 0x00F000, length = 0x001000ZONE7B: origin = 0x218002, length = 0x007FFE/* XINTF zone 7 - data space */
}


SECTIONS
{/* Setup for "boot to SARAM" mode:The codestart section (found in DSP28_CodeStartBranch.asm)re-directs execution to the start of user code.  */codestart: > BEGIN,PAGE = 0ramfuncs: > ZONE7A,PAGE = 0.text: > ZONE7A,PAGE = 0.cinit: > ZONE7A,PAGE = 0.pinit: > ZONE7A,PAGE = 0.switch: > ZONE7A,PAGE = 0.stack: > ZONE7B,PAGE = 1.ebss: > ZONE7B,PAGE = 1.econst: > ZONE7B,PAGE = 1.esysmem: > ZONE7B,PAGE = 1IQmath: > ZONE7A,PAGE = 0IQmathTables: > IQTABLES,  PAGE = 0, TYPE = NOLOADFPUmathTables: > FPUTABLES, PAGE = 0, TYPE = NOLOADDMARAML4: > ZONE7B,PAGE = 1DMARAML5: > ZONE7B,PAGE = 1DMARAML6: > ZONE7B,PAGE = 1DMARAML7: > ZONE7B,PAGE = 1ZONE7DATA: > ZONE7B,PAGE = 1.reset: > RESET,PAGE = 0, TYPE = DSECT /* not used*/csm_rsvd: > CSM_RSVDPAGE = 0, TYPE = DSECT /* not used for SARAM examples */csmpasswds: > CSM_PWLPAGE = 0, TYPE = DSECT /* not used for SARAM examples *//* Allocate ADC_cal function (pre-programmed by factory into TI reserved memory) */.adc_cal: load = ADC_CAL,PAGE = 0, TYPE = NOLOAD

}

在外部sram中仿真,测试下面程序 运行正常

void SendData(void)
{
	int i =0;
	
	unsigned char str1[3] ={0xaa,0xbb,0xcc};
	
	for(i=0; i<3; i++)
	{
		SendBSC0(str1[i]);
	}
	
	SendBSC0(0xdd);
	SendBSC0(0xee);
	SendBSC0(0xff);
}

串口助手能够正常输出 aa,bb,cc,dd,ee,ff.

但是,在正常使用过程中,通过自己编写的引导程序将代码搬移到外部sram中,然后跳转到程序运行,串口助手输出就不正常了,输出 08 20 a0 dd ee ff。

好像在外部sram中运行SendBSC0(str1[i]);会有问题,str'1[i]中的值并不是数组中的值。

求大神帮忙看一下,谢谢。

Nancy Wang:

请到c2000论坛咨询。
e2echina.ti.com/…/

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