TMS320C6655: Compiling Error: Unresolved Symvol intVectorTable

Chunhua Ni

Part Number: TMS320C6655

环境: CCS 5.5, Complier: 8.3.12, DSP TMS320C6655

目标: 1. 理解DSP如何跳转到相应的Interrupt Service Routine; 2) 通过自己写代码来验证上述想法

在CCS中建立个工程，仅包含三个文件：main.c, intvecs.asm, and C665x.cmd (Linker Command File). 本人可以通过对ISR寄存器Bit4置位来触发INT4中断，随后IntDefaultHandler函数会被调用。但编译过程中报错，信息如下：

#10234-D  unresolved symbols remain	InterruptTest		 	
#10010 errors encountered during linking; "InterruptTest.out" not built	InterruptTest
unresolved symbol intcVectorTable, first referenced in ./main.obj	InterruptTest

附上三个文件：

main.c

/*
 * main.c
 */

#define C674X_NMI 1
#define C674X_GEE 2
#define C674X_XEN 3
#define C674X_INT_COUNT 16
#define NUM_SYS_EVENTS 128

extern cregister volatile unsigned int AMR;			//Addressing mode register
extern cregister volatile unsigned int CSR;			//Control status register
extern cregister volatile unsigned int GFPGFR;		//Galois field multiply control register
extern cregister volatile unsigned int ICR;			//Interrupt clear register
extern cregister volatile unsigned int IER;			//Interrupt enable register
extern cregister volatile unsigned int IFR;			//Interrupt flag register
extern cregister volatile unsigned int IRP;			//Interrupt return pointer register
extern cregister volatile unsigned int ISR;			//Interrupt set register
extern cregister volatile unsigned int ISTP;		//Interrupt service table pointer register

typedef void (*c674xISR)(void);

void Intc_Init (void);
void IntDefaultHandler (void);


/******************************************************************************
**                      EXTERNALLY DEFINED FUNCTIONS
******************************************************************************/
extern void intcVectorTable(void);


/******************************************************************************
**                      STATIC VARIABLES/FUNCTIONS
******************************************************************************/
static c674xISR c674xISRtbl[C674X_INT_COUNT];


int main(void) {
	
	Intc_Init();

//	pInterruptRegs->INTMUX1 =
	IER |= (1<<4) + (1<<1);		// set INT4 and NMIE
	CSR |= 1;				// enable GIE

	while(1)
	{
		ISR = (1<<4);	// trigger INT4
		asm(" NOP");
		asm(" NOP");
		asm(" NOP");
	}

	return 0;
}

void Intc_Init (void)
{
   unsigned int step = 0;

   /* Set ISRs to default "do-nothing" routine */
   while(step != C674X_INT_COUNT)
       c674xISRtbl[step++] = IntDefaultHandler;

   /* Set interrupt service table pointer to the vector table */
   ISTP = (unsigned int)intcVectorTable;

   /* Clear pending CPU maskable interrupts (if any) */
   ICR = 0xFFF0;

   /* Enable NMIE bit to allow CPU maskable interrupts */
   IER = (1 << C674X_NMI);
}


void Intc_IntRegister (unsigned int cpuINT, void (*userISR)(void))
{
   /* Assign the user's ISR to the CPU maskable interrupt */
   c674xISRtbl[cpuINT] = userISR;
}

/******************************************************************************
**                 INTERRUPT SERVICE ROUTINES - Used Internally
******************************************************************************/
void IntDefaultHandler (void)
{
   while(1);
}

interrupt void c674x_nmi_isr (void)
{
   c674xISRtbl[1]();
}

interrupt void c674x_rsvd_int2_isr (void)
{
   c674xISRtbl[2]();
}

interrupt void c674x_rsvd_int3_isr (void)
{
   c674xISRtbl[3]();
}

interrupt void c674x_mask_int4_isr (void)
{
   c674xISRtbl[4]();
}

interrupt void c674x_mask_int5_isr (void)
{
   c674xISRtbl[5]();
}

interrupt void c674x_mask_int6_isr (void)
{
   c674xISRtbl[6]();
}

interrupt void c674x_mask_int7_isr (void)
{
   c674xISRtbl[7]();
}

interrupt void c674x_mask_int8_isr (void)
{
   c674xISRtbl[8]();
}

interrupt void c674x_mask_int9_isr (void)
{
   c674xISRtbl[9]();
}

interrupt void c674x_mask_int10_isr (void)
{
   c674xISRtbl[10]();
}

interrupt void c674x_mask_int11_isr (void)
{
   c674xISRtbl[11]();
}

interrupt void c674x_mask_int12_isr (void)
{
   c674xISRtbl[12]();
}

interrupt void c674x_mask_int13_isr (void)
{
   c674xISRtbl[13]();
}

interrupt void c674x_mask_int14_isr (void)
{
   c674xISRtbl[14]();
}

interrupt void c674x_mask_int15_isr (void)
{
   c674xISRtbl[15]();
}

intvecs.asm

;
; File: intvecs.asm
;
; Brief: Contains interrupt vector table and fetch packets
;
; Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
; ALL RIGHTS RESERVED

;**********************************************************
;				Global Symbols
;**********************************************************
	.global _intcVectorTable
	.ref __c_int00
	.global _c674x_nmi_isr
	.global _c674x_rsvd_int2_isr
	.global _c674x_rsvd_int3_isr
	.global _c674x_mask_int4_isr
	.global _c674x_mask_int5_isr
	.global _c674x_mask_int6_isr
	.global _c674x_mask_int7_isr
	.global _c674x_mask_int8_isr
	.global _c674x_mask_int9_isr
	.global _c674x_mask_int10_isr
	.global _c674x_mask_int11_isr
	.global _c674x_mask_int12_isr
	.global _c674x_mask_int13_isr
	.global _c674x_mask_int14_isr
	.global _c674x_mask_int15_isr

;**********************************************************
;				Interrupt Fetch Packet
;**********************************************************
VEC_ENTRY .macro addr
	STW B0,*--B15
	MVKL addr,B0
	MVKH addr,B0
	B B0
	LDW *B15++,B0
	NOP 2
	NOP
	NOP
	.endm

;**********************************************************
;				Interrupt Vector Table
;**********************************************************

	.align 1024
_intcVectorTable:
	VEC_ENTRY __c_int00
	VEC_ENTRY _c674x_nmi_isr
	VEC_ENTRY _c674x_rsvd_int2_isr
	VEC_ENTRY _c674x_rsvd_int3_isr
	VEC_ENTRY _c674x_mask_int4_isr
	VEC_ENTRY _c674x_mask_int5_isr
	VEC_ENTRY _c674x_mask_int6_isr
	VEC_ENTRY _c674x_mask_int7_isr
	VEC_ENTRY _c674x_mask_int8_isr
	VEC_ENTRY _c674x_mask_int9_isr
	VEC_ENTRY _c674x_mask_int10_isr
	VEC_ENTRY _c674x_mask_int11_isr
	VEC_ENTRY _c674x_mask_int12_isr
	VEC_ENTRY _c674x_mask_int13_isr
	VEC_ENTRY _c674x_mask_int14_isr
	VEC_ENTRY _c674x_mask_int15_isr

C665x.cmd

-stack		0x4000
-heap		0x4000

MEMORY
{
	L2SRAM 			o = 0x00800000 l = 0x00100000 /* 1MB L2SRAM */
	/* Core0 running IBL will take up 0x0C000000 ~ 0x0C01FFFF(128KB), reserve at here! */
	MSMCSRAM 		o = 0x0C010000 l = 0x000F0000 /* 896KB MSMCSRAM */
	DDR3 			o = 0x80000000 l = 0x20000000 /* 512MB DDR3 */

	//MSMCRAM	o = 0xC000000	l = 0x00100000
}

SECTIONS
{
	.text		>	L2SRAM
	.cinit		>	L2SRAM
	.const		>	L2SRAM
	.switch		>	L2SRAM
	.stack		>	L2SRAM
	.fardata	>	L2SRAM
	.cio		>	L2SRAM
	.far		> 	L2SRAM


	GROUP
	{
		.neardata 	/* far uninitialized global and global variables */
		.rodata		/* global static constant */
		.bss 		/* uninitialized global variables*/
	} > L2SRAM
}

看上去intvecs.asm未被编译，导致main.c无法识别全局变量intcVectorTable。

查阅了很多资料和论坛帖子，至今未解决。请TI专家识别下哪里有缺失。万分感谢。

3 年多前

+1 Chunhua Ni 3 年多前

我准备用pdk_c665x_2_0_16\packages\ti\csl\arch\c66x\src目录下的intvecs.asm替换掉当前的c674x的，再做一些修改，有问题再请教，谢谢！

0 Shine 3 年多前回复 Chunhua Ni

TI__Guru**** 357097 points

如果您工程生成的.out文件是ELF格式（旧的是COFF格式），汇编语言里变量/函数名前不需要下划线，请尝试将_intcVectorTable前面的下划线去掉。

Removing the COFF Underscore[edit]

COFF ABI adds a leading underscore to C and C++ symbols to prevent name collisions with symbols defined in hand-coded assembly, but EABI does not add this underscore. When using COFF ABI, a function named red_fish written in C will produce a function entry label with the name _red_fish in the assembly source. Under the EABI, the name of the function as it appears in the assembly source will be exactly as it appears in the C code, so the function entry label for red_fish will be red_fish.

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TMS320C6655: Compiling Error: Unresolved Symvol intVectorTable

Removing the COFF Underscore[edit]