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器件型号：TMS320F28069 大家好、
以下是客户提出的问题、可能需要您的帮助：
要在 FLASHA 中自定义引导加载程序、请参阅示例 f28069_flash_kernel、并在此示例中使用 Exit_Boot.asm 文件。 引导加载程序当前没有应用程序更新、仅在启动后通过 SCI 发送一组字符串、并返回应用程序位于 main 中的入口地址。
引导加载程序使用其他参数进行编译- ASM_EXTENSION = S
引导加载程序链接、包含其他参数- entry_point=_InitBoot。
FLAHCODE 中的是应用程序、入口地址为0x3E4000。
当使用仿真器下载在线调试或直接加载时、引导加载程序可以跳转到应用程序以执行。 但是、当移除 JTAG 并重新为目标板加电时、引导加载程序通常可以在 SCI 输出信息、但应用程序不会执行。
引导加载程序 CMD 文件定义如下：
MEMORY
{
PAGE 0 : /* Program Memory */
progRam : origin = 0x008000, length = 0x002000 /* RAML8 : 8K,用于程序*/
dataRam : origin = 0x00A000, length = 0x00A000 /* RAML0~RAML7: 40K,用于数据*/
stkRam : origin = 0x000050, length = 0x0007B0 /* M0~M1 : 2K,用于堆栈*/
APP_FLAG : origin = 0x3F4000, length = 0x000010 /* bootloader flag,ast-boot-28069*/
APP_VER : origin = 0x3F4010, length = 0x000010 /* bootloader version,1.0.0.1*/
FLASHA : origin = 0x3F4020, length = 0x003F60 /* bootloader */
CSM_RSVD : origin = 0x3F7F80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
BEGIN : origin = 0x3F7FF6, length = 0x000002 /* Part of FLASHA. Used for "boot to Flash" bootloader mode. */
CSM_PWL_P0 : origin = 0x3F7FF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
ROM : origin = 0x3FF3B0, length = 0x000C10 /* Boot ROM */
RESET : origin = 0x3FFFC0, length = 0x000002 /* part of boot ROM */
VECTORS : origin = 0x3FFFC2, length = 0x00003E /* part of boot ROM */
BOOT_RSVD : origin = 0x000000, length = 0x000050 /* Part of M0, BOOT rom will use this for stack */
USB_RAM : origin = 0x040000, length = 0x000800 /* USB RAM */
}
/* Allocate sections to memory blocks.
Note:
codestart user defined section in DSP28_CodeStartBranch.asm used to redirect code
execution when booting to flash
ramfuncs user defined section to store functions that will be copied from Flash into RAM
*/
SECTIONS
{
/* Allocate program areas: */
AppFlag : > APP_FLAG, PAGE = 0
AppVer : > APP_VER, PAGE = 0
.cinit : > FLASHA, PAGE = 0
.pinit : > FLASHA, PAGE = 0
.text : > FLASHA, PAGE = 0
codestart : > BEGIN, PAGE = 0
csmpasswds : > CSM_PWL_P0, PAGE = 0
csm_rsvd : > CSM_RSVD, PAGE = 0
ramfuncs : LOAD = FLASHA,
RUN = progRam,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
LOAD_SIZE(_RamfuncsLoadSize),
PAGE = 0
.stack : > dataRam, PAGE = 0
.cio : > dataRam, PAGE = 0
.sysmem : > dataRam, PAGE = 0
.ebss : > dataRam, PAGE = 0
.esysmem : > dataRam, PAGE = 0
.econst : > FLASHA, PAGE = 0
.switch : > FLASHA, PAGE = 0
.reset : > RESET, PAGE = 0, TYPE = DSECT
vectors : > VECTORS, PAGE = 0, TYPE = DSECT
}
引导加载程序主函数如下：
#define FLASH_ENTRY_POINT 0X3E4000
const unsigned char ucWelcome[] = "bootloader 1.0.0.1";
Uint32 main(void)
{
/** 将需要在RAM中运行的代码从Flash拷贝到RAM中*/
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (Uint32)&RamfuncsLoadSize);
/* 系统初始化 */
DisableDog();
XtalOscSel();
InitPll(DSP28_PLLCR,DSP28_DIVSEL);
DELAY_US(100);
/** 初始化对外接口 */
EST_Initialize();
SCIB_Init();
SCIB_TxByte(ucWelcome,sizeof(ucWelcome) - 1);
/** app接收程序 */
return 0X3E4000;
}
应用程序 cmd 定义如下：
MEMORY
{
PAGE 0 : /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
OTP : origin = 0x3D7800, length = 0x000400 /* on-chip OTP */
progRAM : origin = 0x008000, length = 0x00C000 /* RAML1~RAML8,48K*/
// FLASHH : origin = 0x3D8000, length = 0x004000 /* on-chip FLASH */
// FLASHG : origin = 0x3DC000, length = 0x004000 /* on-chip FLASH */
// FLASHF : origin = 0x3E0000, length = 0x004000 /* on-chip FLASH */
//FLASHE : origin = 0x3E4000, length = 0x004000 /* on-chip FLASH */
//FLASHD : origin = 0x3E8000, length = 0x004000 /* on-chip FLASH */
//FLASHC : origin = 0x3EC000, length = 0x004000 /* on-chip FLASH */
progRom : origin = 0x3E4002, length = (0x00C000 - 0x2) /* FLASHC|FLASHD|FLASHE */
CSM_RSVD : origin = 0x3F7F80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
BEGIN : origin = 0x3E4000, length = 0x000002 /* BEGIN,part of FLASHE*/
CSM_PWL_P0 : origin = 0x3F7FF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
FPUTABLES : origin = 0x3FD860, length = 0x0006A0 /* FPU Tables in Boot ROM */
IQTABLES : origin = 0x3FDF00, length = 0x000B50 /* IQ Math Tables in Boot ROM */
IQTABLES2 : origin = 0x3FEA50, length = 0x00008C /* IQ Math Tables in Boot ROM */
IQTABLES3 : origin = 0x3FEADC, length = 0x0000AA /* IQ Math Tables in Boot ROM */
ROM : origin = 0x3FF3B0, length = 0x000C10 /* Boot ROM */
RESET : origin = 0x3FFFC0, length = 0x000002 /* part of boot ROM */
VECTORS : origin = 0x3FFFC2, length = 0x00003E /* part of boot ROM */
*/
BOOT_RSVD : origin = 0x000000, length = 0x000050 /* Part of M0, BOOT rom will use this for stack */
RAMM0 : origin = 0x000050, length = 0x0003B0 /* on-chip RAM block M0 */
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
}
SECTIONS
{
/* Allocate program areas: */
.cinit : > progRom, PAGE = 0
.pinit : > progRom, PAGE = 0
.text : > progRom, PAGE = 0
codestart : > BEGIN, PAGE = 0
ramfuncs : LOAD = progRom,
RUN = progRAM,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
LOAD_SIZE(_RamfuncsLoadSize),
PAGE = 0
csmpasswds : > CSM_PWL_P0, PAGE = 0
csm_rsvd : > CSM_RSVD, PAGE = 0
/* Allocate uninitalized data sections: */
.stack : > progRAM, PAGE = 0
.ebss : > progRAM, PAGE = 0
.esysmem : > progRAM, PAGE = 0
/* Initalized sections to go in Flash */
/* For SDFlash to program these, they must be allocated to page 0 */
.econst : > progRom, PAGE = 0
.switch : > progRom, PAGE = 0
/* Allocate IQ math areas: */
IQmath : > progRom, PAGE = 0 /* Math Code */
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD
/* Allocate FPU math areas: */
FPUmathTables : > FPUTABLES, PAGE = 0, TYPE = NOLOAD
.reset : > RESET, PAGE = 0, TYPE = DSECT
vectors : > VECTORS, PAGE = 0, TYPE = DSECT
}
您可以帮助检查此案例吗？ 谢谢。
此致、
樱桃
