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关于TMS320f2812的诡异问题

菜鸟
2006-01-12 17:20:33     打赏
我使用的是CCS3。1 我在程序中使用两个static const 数组作为DFT运算的系数。可每次分配到具体的RAM中,数据都会改变。比如在程序中我定义: static const int real[16] = {1024,946,724,392,0,-392,-724,-946,-1024,-946,-724,-392,0,392,724,946}; 然后编译分配到Ram中后,查看memory中的数据,就会发现其中有数据变成0或者-65536。 请问这是什么原因?怎么解决呢? 已经试过的方法: 1,把数组定义为局部变量 2,使用CCS2。2 都不行。 谢谢各位!



关键词: 关于     TMS320f2812     诡异     问题    

菜鸟
2006-01-12 17:21:00     打赏
2楼
这是我的CMD文件。 MEMORY { PAGE 0 : PRAMH0 : origin = 0x3f8000, length = 0x002000 PAGE 1 : /* SARAM */ RAMM0 : origin = 0x000000, length = 0x000400 RAMM1 : origin = 0x000400, length = 0x000400 /* Peripheral Frame 0: */ DEV_EMU : origin = 0x000880, length = 0x000180 FLASH_REGS : origin = 0x000A80, length = 0x000060 CSM : origin = 0x000AE0, length = 0x000010 XINTF : origin = 0x000B20, length = 0x000020 CPU_TIMER0 : origin = 0x000C00, length = 0x000008 CPU_TIMER1 : origin = 0x000C08, length = 0x000008 CPU_TIMER2 : origin = 0x000C10, length = 0x000008 PIE_CTRL : origin = 0x000CE0, length = 0x000020 PIE_VECT : origin = 0x000D00, length = 0x000100 /* Peripheral Frame 1: */ ECAN_A : origin = 0x006000, length = 0x000100 ECAN_AMBOX : origin = 0x006100, length = 0x000100 /* Peripheral Frame 2: */ SYSTEM : origin = 0x007010, length = 0x000020 SPI_A : origin = 0x007040, length = 0x000010 SCI_A : origin = 0x007050, length = 0x000010 XINTRUPT : origin = 0x007070, length = 0x000010 GPIOMUX : origin = 0x0070C0, length = 0x000020 GPIODAT : origin = 0x0070E0, length = 0x000020 ADC : origin = 0x007100, length = 0x000020 EV_A : origin = 0x007400, length = 0x000040 EV_B : origin = 0x007500, length = 0x000040 SPI_B : origin = 0x007740, length = 0x000010 SCI_B : origin = 0x007750, length = 0x000010 MCBSP_A : origin = 0x007800, length = 0x000040 /* CSM Password Locations */ CSM_PWL : origin = 0x3F7FF8, length = 0x000008 /* SARAM */ /* DRAMH0 : origin = 0x009000, length = 0x001000 MYCONSTANT : origin = 0x008D40, length = 0x0002C0*/ DRAMH0 : origin = 0x008000, length = 0x002000 } SECTIONS { /* Allocate program areas: */ .reset : > PRAMH0, PAGE = 0 .text : > PRAMH0, PAGE = 0 .cinit : > PRAMH0, PAGE = 0 /* Allocate data areas: */ .stack : > RAMM1, PAGE = 1 .bss : > DRAMH0, PAGE = 1 .ebss : > DRAMH0, PAGE = 1 .const : > DRAMH0, PAGE = 1 .econst : > DRAMH0, PAGE = 1 /* .econst : > MYCONSTANT, PAGE = 1*/ .sysmem : > DRAMH0, PAGE = 1 /* Allocate Peripheral Frame 0 Register Structures: */ DevEmuRegsFile : > DEV_EMU, PAGE = 1 FlashRegsFile : > FLASH_REGS, PAGE = 1 CsmRegsFile : > CSM, PAGE = 1 XintfRegsFile : > XINTF, PAGE = 1 CpuTimer0RegsFile : > CPU_TIMER0, PAGE = 1 CpuTimer1RegsFile : > CPU_TIMER1, PAGE = 1 CpuTimer2RegsFile : > CPU_TIMER2, PAGE = 1 PieCtrlRegsFile : > PIE_CTRL, PAGE = 1 PieVectTable : > PIE_VECT, PAGE = 1 /* Allocate Peripheral Frame 2 Register Structures: */ ECanaRegsFile : > ECAN_A, PAGE = 1 ECanaMboxesFile : > ECAN_AMBOX PAGE = 1 /* Allocate Peripheral Frame 1 Register Structures: */ SysCtrlRegsFile : > SYSTEM, PAGE = 1 SpiaRegsFile : > SPI_A, PAGE = 1 SciaRegsFile : > SCI_A, PAGE = 1 XIntruptRegsFile : > XINTRUPT, PAGE = 1 GpioMuxRegsFile : > GPIOMUX, PAGE = 1 GpioDataRegsFile : > GPIODAT PAGE = 1 AdcRegsFile : > ADC, PAGE = 1 EvaRegsFile : > EV_A, PAGE = 1 EvbRegsFile : > EV_B, PAGE = 1 ScibRegsFile : > SCI_B, PAGE = 1 McbspaRegsFile : > MCBSP_A, PAGE = 1 /* CSM Password Locations */ CsmPwlFile : > CSM_PWL, PAGE = 1 }

菜鸟
2006-12-11 20:40:00     打赏
3楼
const数据类型要固化在FLASH中,运行时自动调入RAM中,或者通过查表指令在FLASH中查找,但在CMD文件中要加入类似下面的语句 ramfuncs : LOAD = FLASH, RUN = RAML0, LOAD_START(_RamfuncsLoadStart), LOAD_END(_RamfuncsLoadEnd), RUN_START(_RamfuncsRunStart), PAGE = 0

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