DSP在线升级程序步骤

DSP在线升级程序步骤
DSP在线升级程序步骤

目标板:C2000的28335/28069

一、主要思路:

1、准备升级程序(相当于一个bootloader),作为上电首先运行的程序。进入升级程序,首先判断需不需要升级,需要升级,进入升级状态,通信完成新的主程序的接收,存入,升级成功后,进入主程序运行。

2、在主程序运行时,收到升级指令,标记升级标志,重启进入升级程序进去升级。

3、板子上电后,会调到flash启动的起始地址0x33FFF6(DSP28335),这个地址存放着程序的codestart 的其实地址。所以,修改了0x33FFF6的存放的值,那么就能决定执行那一段程序。还可以通过汇编跳转指令直接跳转到程序codestart执行。

二、升级程序

1、具备能力:具备通信能力和Flash读写能力

2、准备:Flash API移植、上位机的升级配套程序;存储升级标志位的空间(外部EEPROM,不会随便擦除的内部Flash)

3、流程:接收->校验->烧写->跳转

三、升级步骤

1、数据接收:通过CAN/串口等方式接收数据。由于28335内存较小,不适合缓存大量的数据,这里是接收一部分数据,校验完成后烧写进Flash,再去接收一部分数据

2、数据解析:接收到的数据是hex格式的数据,所以需要解析才能放入对应的flash地址。但由于28335能力限制,这里采用先在上位机解析完成,采用先告知地址,然后发送数据的方式完成数据通信和传输。

3、校验:这里采用crc校验。

/******************************************************

*Name : crc16

*Function: crc校验16位

*Params : data(UInt8 *):待操作的数组 len:数据长度

*Return : UInt16:返回CRC值 CRC校验码为2个字节高位在前

*******************************************************/

UInt16 crc16(Uint8 *data, UInt16 len)

{

UInt16 CRC = 0xFFFF;

UInt8 j, TMP = 0;

UInt8 i;

for (i = 0; i < len; i++)

{

CRC ^= data[i];

for (j = 0; j < 8; j++)

{

TMP = CRC & 0x0001;

CRC = CRC >> 1;

if(TMP)

CRC = CRC ^ 0xA001;

}

}

return CRC;

}

4、数据烧写flash:运用flash API提供的接收完成数据的烧写。这里要注意flash API必须运行在RAM 中。

5、完成数据烧写后,需要跳转到主程序。一般采用汇编指令。汇编指令asm("LB 0xXXXXXX")或者汇编函数。

这里采用asm的方式,跳转地址为新应用程序的起始地址,这里必须规定每次跟新的新应用程序的起始地址必须固定。

asm(" LB 0x3xxxxx");

如果是使用变动的起始地址,则必须采用汇编函数,把地址作为参数传进函数。

四、主程序

1、接收升级指令后,能够标志升级状态。重启进入升级程序,进行判断,进而升级程序。

2、主程序运行后,升级状态标记为不用升级状态。

五、注意点

1、升级程序与主程序要严格分开,合理分配flash空间,附升级程序和主程序cmd大致分配空间。

主程序cmd文件

/**********************************************************************

* File: f28335_nonBIOS_flash.cmd -- Linker command file for non-DSP/BIOS

* code with DSP in Boot to Flash boot mode.

*

* History: 09/18/07 - original (D. Alter)

**********************************************************************/

MEMORY

{

PAGE 0: /* Program Memory */

BEGIN_M0 : origin = 0x000000, length = 0x000002 /* Part of M0SARAM. Used for "Bo ot to M0" bootloader mode. */

FLASH_PROGRAMS : origin = 0x310000, length = 0x000010 /* On-chip FLASH */

FLASH_PROGRAM : origin = 0x310010, length = 0x01FFF0 /* On-chip FLASH */

ZONE7A : origin = 0x200000, length = 0x010000

CSM_RSVD : origin = 0x33FF80, length = 0x000076 /* Part of FLASH Sector A. Reserve d when CSM is in use. */

BEGIN_FLASH : origin = 0x33FFF6, length = 0x000002 /* Part of FLASH Sector A. Used fo r "Jump to flash" bootloader mode. */

PASSWORDS : origin = 0x33FFF8, length = 0x000008 /* Part of FLASH Sector A. CSM p assword locations. */

ADC_CAL : origin = 0x380080, length = 0x000009 /* ADC_cal function in Reserved me mory */

OTP : origin = 0x380400, length = 0x000400 /* 1Kw OTP */

IQTABLES : origin = 0x3FE000, length = 0x000B50 /* Part of Boot ROM */

IQTABLES2 : origin = 0x3FEB50, length = 0x00008C /* Part of Boot ROM */

FPUTABLES : origin = 0x3FEBDC, length = 0x0006A0 /* Part of Boot ROM */

BOOTROM : origin = 0x3FF27C, length = 0x000D44 /* 8Kw Boot ROM */

RESET : origin = 0x3FFFC0, length = 0x000002 /* part of Boot ROM */

FLASH_CONST : origin = 0x300000, length = 0x010000

PAGE 1 : /* Data Memory */

M0SARAM : origin = 0x000002, length = 0x0003FE /* 1Kw M0 SARAM */

M1SARAM : origin = 0x000400, length = 0x000400 /* 1Kw M1 SARAM */

DRAM : origin = 0x008000, length = 0x008000

PIEVECT : origin = 0x000D00, length = 0x000100

ZONE7B : origin = 0x210000, length = 0x010000

// FLASH_DATA : origin = 0x330000, length = 0x008000 /* On-chip FLASH */

}

SECTIONS

{

/*** Compiler Required Sections ***/

/* Program memory (PAGE 0) sections */

.text1 : {DSP2833x_CodeStartBranch.obj(.text)}> FLASH_PROGRAMS, PAGE = 0

.text2 : {*(.text)}> FLASH_PROGRAM, PAGE = 0

.cinit : > FLASH_PROGRAM, PAGE = 0

.const : > FLASH_PROGRAM, PAGE = 0

.econst : > FLASH_CONST, PAGE = 0

.pinit : > FLASH_PROGRAM, PAGE = 0

.reset : > RESET, PAGE = 0, TYPE = DSECT /* We are not using the .reset secti on */

.switch : > FLASH_PROGRAM, PAGE = 0

.cio : > FLASH_PROGRAM, PAGE = 0

/* Data Memory (PAGE 1) sections */

.bss : > DRAM, PAGE = 1

.ebss : > DRAM, PAGE = 1

.stack : > DRAM, PAGE = 1

.sysmem : > ZONE7B, PAGE = 1

.esysmem : > ZONE7B, PAGE = 1

/*** User Defined Sections ***/

codestart : > BEGIN_FLASH, PAGE = 0 /* Used by file CodeStartBranch.as m */

csm_rsvd : > CSM_RSVD, PAGE = 0 /* Used by file passwords.asm */ internalMemFuncs : > FLASH_PROGRAM, PAGE = 0 /* Used by file Xintf.c. Link to internal memory */

passwords : > PASSWORDS, PAGE = 0 /* Used by file passwords.asm */

/* Section secureRamFuncs used by file SysCtrl.c. */

ramfuncs : LOAD = FLASH_PROGRAM, PAGE = 0 /* Should be Flash */

RUN = ZONE7A, PAGE = 0 /* Must be CSM secured RAM */

LOAD_START(_RamfuncsLoadStart),

LOAD_END(_RamfuncsLoadEnd),

RUN_START(_RamfuncsRunStart)

/* Allocate ADC_cal function (pre-programmed by factory into TI reserved memory) */

.adc_cal : load = ADC_CAL, PAGE = 0, TYPE = NOLOAD

}

/******************* end of file ************************/

升级程序cmd文件

/**********************************************************************

* File: f28335_nonBIOS_flash.cmd -- Linker command file for non-DSP/BIOS

* code with DSP in Boot to Flash boot mode.

*

* History: 09/18/07 - original (D. Alter)

**********************************************************************/

MEMORY

{

PAGE 0: /* Program Memory */

BEGIN_M0 : origin = 0x000000, length = 0x000002 /* Part of M0SARAM. Used for "Bo ot to M0" bootloader mode. */

FLASH_PROGRAM : origin = 0x330000, length = 0x005000 /* On-chip FLASH G*/

FLASH_PROGRAM1 : origin = 0x335000, length = 0x001000 /* On-chip FLASH G*/

FLASH_CONST : origin = 0x336000, length = 0x001000 /* On-chip FLASH G*/

ZONE7A : origin = 0x200000, length = 0x010000

CSM_RSVD : origin = 0x33FF80, length = 0x000076 /* Part of FLASH Sector A. Reserve d when CSM is in use. */

BEGIN_FLASH : origin = 0x33FFF6, length = 0x000002 /* Part of FLASH Sector A. Used fo r "Jump to flash" bootloader mode. */

PASSWORDS : origin = 0x33FFF8, length = 0x000008 /* Part of FLASH Sector A. CSM p assword locations. */

ADC_CAL : origin = 0x380080, length = 0x000009 /* ADC_cal function in Reserved me mory */

OTP : origin = 0x380400, length = 0x000400 /* 1Kw OTP */

IQTABLES : origin = 0x3FE000, length = 0x000B50 /* Part of Boot ROM */

IQTABLES2 : origin = 0x3FEB50, length = 0x00008C /* Part of Boot ROM */

FPUTABLES : origin = 0x3FEBDC, length = 0x0006A0 /* Part of Boot ROM */

BOOTROM : origin = 0x3FF27C, length = 0x000D44 /* 8Kw Boot ROM */

RESET : origin = 0x3FFFC0, length = 0x000002 /* part of Boot ROM */

PAGE 1 : /* Data Memory */

M0SARAM : origin = 0x000002, length = 0x0003FE /* 1Kw M0 SARAM */

M1SARAM : origin = 0x000400, length = 0x000400 /* 1Kw M1 SARAM */

DRAM : origin = 0x008000, length = 0x008000

PIEVECT : origin = 0x000D00, length = 0x000100

ZONE7B : origin = 0x210000, length = 0x010000

//FLASH_DATA : origin = 0x330000, length = 0x008000 /* On-chip FLASH B*/

}

SECTIONS

{

Flash28_API:

{

-lFlash28335_API_V210.lib(.econst)

-lFlash28335_API_V210.lib(.text)

} LOAD = FLASH_PROGRAM1,

RUN = ZONE7A,

LOAD_START(_Flash28_API_LoadStart),

LOAD_END(_Flash28_API_LoadEnd),

RUN_START(_Flash28_API_RunStart),

PAGE = 0

/*** Compiler Required Sections ***/

/* Program memory (PAGE 0) sections */

.text : > FLASH_PROGRAM, PAGE = 0

.cinit : > FLASH_PROGRAM, PAGE = 0

.const : > FLASH_PROGRAM, PAGE = 0

.econst : > FLASH_CONST, PAGE = 0

.pinit : > FLASH_PROGRAM, PAGE = 0

.reset : > RESET, PAGE = 0, TYPE = DSECT /* We are not using the .reset secti on */

.switch : > FLASH_PROGRAM, PAGE = 0

.cio : > FLASH_PROGRAM, PAGE = 0

/* Data Memory (PAGE 1) sections */

.bss : > DRAM, PAGE = 1

.ebss : > DRAM, PAGE = 1

.stack : > DRAM, PAGE = 1

.sysmem : > ZONE7B, PAGE = 1

.esysmem : > ZONE7B, PAGE = 1

/*** User Defined Sections ***/

codestart : > BEGIN_FLASH, PAGE = 0 /* Used by file CodeStartBranch.as m */

csm_rsvd : > CSM_RSVD, PAGE = 0 /* Used by file passwords.asm */ internalMemFuncs : > FLASH_PROGRAM, PAGE = 0 /* Used by file Xintf.c. Link to internal memory */

passwords : > PASSWORDS, PAGE = 0 /* Used by file passwords.asm */

/* Section secureRamFuncs used by file SysCtrl.c. */

ramfuncs : LOAD = FLASH_PROGRAM, PAGE = 0 /* Should be Flash */

RUN = ZONE7A, PAGE = 0 /* Must be CSM secured RAM */

LOAD_START(_RamfuncsLoadStart),

LOAD_END(_RamfuncsLoadEnd),

RUN_START(_RamfuncsRunStart)

/* Allocate ADC_cal function (pre-programmed by factory into TI reserved memory) */

.adc_cal : load = ADC_CAL, PAGE = 0, TYPE = NOLOAD

}

/******************* end of file ************************/

2、固定程序起始地址的方法为,codeStartBranch.asm的其实地址,即codestart的其实地址,这里使用

.text1 : {DSP2833x_CodeStartBranch.obj(.text)}> FLASH_PROGRAMS, PAGE = 0

.text2 : {*(.text)}> FLASH_PROGRAM, PAGE = 0

详见主程序cmd文件描述。

3、升级后会出现跳转到主程序,不能执行的情况,所以必须要提供一个方式,解决这个问题。这里做了几个处理:

(1)进入主程序后,再修改升级标志位

(2)启动升级程序后,未进入主程序前,留有可以与上位机通信方式,可以再次进入升级模式。(3)启动升级程序后,必须接收到一个指令才跳转至主程序执行

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