DSP学习心得笔记.docx

1、DSP学习心得笔记DSP学习心得笔记- 白建成.baijc.icekoor建立新工程过程中：问题1：GPIO_Study.c, line 61: fatal error: could not open source file DSP280x_Device.h1 fatal error detected in the compilation of GPIO_Study.c.解决方法：因为project build optionscompilerpreprocessor中，要包含的头文件的地址没有加进去，你可以找到头文件的地址，然后加进去。问题2：undefined first reference

2、d symbol in file- -_c_int00 D:DSP studytest3DebugDSP280x_CodeStartBranch.objFS$MPY D:DSP studytest3DebugDSP280x_CpuTimers.objFS$TOL D:DSP studytest3DebugDSP280x_CpuTimers.obj error: symbol referencing errors - ./Debug/test3.out not built或者下面的问题：undefined first referenced symbol in file- -_c_int00 D:

3、DSP studyGPIO_StudyDebugDSP280x_CodeStartBranch.obj error: symbol referencing errors - ./Debug/GPIO_Study.out not built解决办法都是下面：这个问题是因为没有加在库文件，请在project build optionslinkerlibraries中加入rts2800.lib。问题3： warning: creating .stack section with default size of 400 (hex) words. Use -stack option to change

4、the default size. error: cant allocate .stack, size 00000400 (page 1) in RAMM1 (avail: 00000380) error: errors in input - ./Debug/GPIO_Study.out not built解决办法：这个问题是关于堆栈存储大小的问题，他是说，创建堆栈段使用与设置400个字，并建议在“堆栈操作”中改变这个与设置。这时，需要进行如下修改就可通过：project build optionsLinkerbasic，在Stack Size(-stack):填入800或者其他小于1024的

5、数值。调试程序：在编译完成之后，要来下载程序并进行功能调试。FileLoad Program，在工程文件夹下面的Debug文件夹下，选中*.out文件，点击打开，便开始下载程序了。将*.out文件下载到目标板上2812的RAM中。注意，这里是调试，所以将程序下载到RAM。等到最后您要固化程序的时候，就得下载到FLASH了，因为断电之后，RAM里面所有的数据都会消失。（Run和Animate的区别，Run是如果遇到断点的话它就停下来了。而Animate就算遇到断点时先停止DSP内核，刷新窗口，然后接着继续启动运行，常用来连续刷新变量窗口和生成graph图形等）知识储备。添加断点：加上断点的方法很

6、简单，只要在该行代码前双击就行。双击之后，这行代码前面会出现一个红色圆块。另外一种添加断点的方法，就是在刚才的编译工具栏上，点一下那个小手图形的按钮，前提是你要把光标移动到想要设置断点的哪一行上。使用watch window：Watch window的作用是来观察程序运行过程中的各个变量的值。调用watch window的方法是点击菜单栏的View ,watch window，这时watch window就会显示在CCS下方的信息区域；选中所要观察的变量，然后右键，在右键菜单中选择add to watch window。调试代码观察：我们在调试程序的时候经常想让程序从Main函数开使运行，点D

7、ebugGo main。 既能看到源文件中代码的执行情况，又能看到汇编指令的执行情况ViewMixed Source/Asm；关于F2812中用C语言来实现中断的说明1.首先在.cmd中定位系统中断表：MEMORYPAGE 0 : .PAGE 1 : . PIE_VECT : origin = 0x000D00, length = 0x000100. SECTIONS. PieVectTable : PIE_VECT, PAGE = 1.2.在C中制定该中断的结构体：#pragma DATA_SECTION(PieVectTable,PieVectTable);struct PIE_VECT_

8、TABLE PieVectTable;（在DSP28_GlobalVariableDefs.C中初始化）3.用一组常数（按照中断向量的顺序）初始化该名字为PIE_VECT_TABLE的表：typedef interrupt void(*PINT)(void);这里有些一问，一下应该为函数名？/ Define Vector Table:struct PIE_VECT_TABLE / Reset is never fetched from this table. / It will always be fetched from 0x3FFFC0 in either/ boot ROM or XIN

9、TF Zone 7 depending on the state of/ the XMP/MC input signal. On the F2810 it is always/ fetched from boot ROM. PINT PIE1_RESERVED; PINT PIE2_RESERVED; PINT PIE3_RESERVED; PINT PIE4_RESERVED; PINT PIE5_RESERVED; PINT PIE6_RESERVED; PINT PIE7_RESERVED; PINT PIE8_RESERVED; PINT PIE9_RESERVED; PINT PIE

10、10_RESERVED; PINT PIE11_RESERVED; PINT PIE12_RESERVED; PINT PIE13_RESERVED;/ Non-Peripheral Interrupts: PINT XINT13; / XINT13 PINT TINT2; / CPU-Timer2 PINT DATALOG; / Datalogging interrupt PINT RTOSINT; / RTOS interrupt PINT EMUINT; / Emulation interrupt PINT XNMI; / Non-maskable interrupt PINT ILLE

11、GAL; / Illegal operation TRAP PINT USER0; / User Defined trap 0 PINT USER1; / User Defined trap 1 PINT USER2; / User Defined trap 2 PINT USER3; / User Defined trap 3 PINT USER4; / User Defined trap 4 PINT USER5; / User Defined trap 5 PINT USER6; / User Defined trap 6 PINT USER7; / User Defined trap

12、7 PINT USER8; / User Defined trap 8 PINT USER9; / User Defined trap 9 PINT USER10; / User Defined trap 10 PINT USER11; / User Defined trap 11 / Group 1 PIE Peripheral Vectors: PINT PDPINTA; / EV-A PINT PDPINTB; / EV-B PINT rsvd1_3; PINT XINT1; PINT XINT2; PINT ADCINT; / ADC PINT TINT0; / Timer 0 PIN

13、T WAKEINT; / WD ./ Group 12 PIE Peripheral Vectors: PINT rsvd12_1; PINT rsvd12_2; PINT rsvd12_3; PINT rsvd12_4; PINT rsvd12_5; PINT rsvd12_6; PINT rsvd12_7; PINT rsvd12_8;然后在使我们在.cmd文件中定义的表有以上属性：extern struct PIE_VECT_TABLE PieVectTable;(在.h文件中）4.初始化该表（在.c文件中）使之能够为主程序所使用：const struct PIE_VECT_TABLE

14、PieVectTableInit = PIE_RESERVED, / Reserved space PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, PIE_RESERVED, / Non-Peripheral Interrupts INT13_ISR, / XINT13 or CPU-Timer 1 INT14_ISR, / CPU-Ti

15、mer2 DATALOG_ISR, / Datalogging interrupt RTOSINT_ISR, / RTOS interrupt EMUINT_ISR, / Emulation interrupt NMI_ISR, / Non-maskable interrupt ILLEGAL_ISR, / Illegal operation TRAP USER0_ISR, / User Defined trap 0 USER1_ISR, / User Defined trap 1 USER2_ISR, / User Defined trap 2 USER3_ISR, / User Defin

16、ed trap 3 USER4_ISR, / User Defined trap 4 USER5_ISR, / User Defined trap 5 USER6_ISR, / User Defined trap 6 USER7_ISR, / User Defined trap 7 USER8_ISR, / User Defined trap 8 USER9_ISR, / User Defined trap 9 USER10_ISR, / User Defined trap 10 USER11_ISR, / User Defined trap 11/ Group 1 PIE Vectors P

17、DPINTA_ISR, / EV-A PDPINTB_ISR, / EV-B rsvd_ISR, XINT1_ISR, XINT2_ISR, ADCINT_ISR, / ADC TINT0_ISR, / Timer 0 WAKEINT_ISR, / WD./ Group 12 E Vectors rsvd_ISR, rsvd_ISR, rsvd_ISR, rsvd_ISR, rsvd_ISR, rsvd_ISR, rsvd_ISR, rsvd_ISR, ;/-/ InitPieVectTable: /-/ This function initializes the PIE vector tab

18、le to a known state./ This function must be executed after boot time./void InitPieVectTable(void)int16 i;Uint32 *Source = (void *) &PieVectTableInit;Uint32 *Dest = (void *) &PieVectTable;EALLOW; for(i=0; i 128; i+)*Dest+ = *Source+; EDIS;/ Enable the PIE Vector TablePieCtrl.PIECRTL.bit.ENPIE = 1; 5.

19、中断服务程序：让以上的数值指向你所要的服务程序，例如：PieVectTable.TINT2 = &ISRTimer2;那么，ISRTimer2也就成了中断服务程序，切记：一定要在主程序的开始先声明该程序：interrupt void ISRTimer2(void);.然后按照您的需要编制该程序：interrupt void ISRTimer2(void)CpuTimer2.InterruptCount+;编程中遇到的问题：1、 line 257: warning: last line of file ends without a newline；解决方法：点击出现的问题条，看光标定位在哪里，然

20、后一点点删除，直到把编程的文字删除，最后把删除的写出来，回车就行了，因为回车的格式要在编辑状态哈哈！28016的定时器笔记学过2812的人会知道，2812的定时器和28016的定时器的寄存器很不一样。但是从功能上将差不多。关于28016定时器的时钟的讨论；定时器的时钟是由SYSCLKOUT经过TBCTL中的CLKDIV和HSPCLKDIV进行配置；和主要说明，我们应该记得SYSCLKOUT和HSPCLK之间还可以分频，但是在这里这个寄存器不影响。关于28016定时器的时钟同步的讨论；如果我们想使每个PWM模块具有同步时钟，我们可以通过软件强制各个模块之间同步，设定步骤如下： EPwm1Regs

21、.TBCTL.bit.SYNCOSEL = 0 / Pass through EPwm2Regs.TBCTL.bit.SYNCOSEL = 0; / Pass through EPwm3Regs.TBCTL.bit.SYNCOSEL = 0; / Pass through EPwm1Regs.TBCTL.bit.SWFSYNC = 1; EPwm2Regs.TBCTL.bit.SWFSYNC = 1; EPwm3Regs.TBCTL.bit.SWFSYNC = 1;以上程序是设定PWM1/2/3同步，我们由于我们只采用向上计数，所以不需要设定计数方向位。接下来如果我们想PWM1与PWM2输出相

22、位不一样，保持某个相位差，我们可以通过寄存器设定；EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE; EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE; EPwm3Regs.TBCTL.bit.PHSEN = TB_ENABLE; EPwm1Regs.TBPHS.half.TBPHS = 0; EPwm2Regs.TBPHS.half.TBPHS = 250; EPwm3Regs.TBPHS.half.TBPHS = 500;首先使能，然后赋予值；关于一些其他的配置如下：EPwm3Regs.TBPRD = PWM3_TIMER_TBPRD;

23、EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; / Count up EPwm3Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Enable INT on Zero event EPwm3Regs.ETSEL.bit.INTEN = PWM3_INT_ENABLE; / Enable INT EPwm3Regs.ETPS.bit.INTPRD = ET_1ST; / Generate INT on 3rd event关于28016PWM配置的讨论PWM1的A/B的独立配置；除了counter-compare比较寄存器，CMPA

24、，CMPB，主要还是配置控制寄存器CMPCTL，对于影子寄存器的配置，还有影子寄存器的装载模式。这里主要讲关于PWM中action qualifier的配置；模式1：/ Setup shadow register load on ZERO EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW; EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

25、/ Set Compare values EPwm1Regs.CMPA.half.CMPA = EPWM1_MIN_CMPA; / Set compare A value EPwm1Regs.CMPB = 500; / Set Compare B value / Set actions EPwm1Regs.AQCTLA.bit.ZRO = AQ_CLEAR; / Set PWM1A on Zero EPwm1Regs.AQCTLA.bit.CAU = AQ_SET; / Clear PWM1A on event A, up coun EPwm1Regs.AQCTLB.bit.ZRO = AQ_

26、SET; / Set PWM1B on Zero EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR; / Clear PWM1B on event B, up count / Interrupt where we will change the Compare Values EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Select INT on Zero event EPwm1Regs.ETSEL.bit.INTEN = 1; / Enable INT EPwm1Regs.ETPS.bit.INTPRD = ET_3RD; /

27、Generate INT on 3rd event 其中红色的为PWM的输出方式配置，当PWM1.A在counter=0时，输出为0，在counter=CMPA时，且在向上计数，输出为1；而PWM1.B相反。模式二： / Set actions EPwm2Regs.AQCTLA.bit.PRD = AQ_CLEAR; / Clear PWM2A on Period EPwm2Regs.AQCTLA.bit.CAU = AQ_SET; / Set PWM2A on event A, up count EPwm2Regs.AQCTLB.bit.PRD = AQ_CLEAR; / Clear PWM

28、2B on Period EPwm2Regs.AQCTLB.bit.CBU = AQ_SET; / Set PWM2B on event B, up count其中红色的为PWM的输出方式配置，当PWM1.A在counter=period时，输出为0，在counter=CMPA时，且在向上计数，输出为1；而PWM1.B相同；模式三：/ Set Actions EPwm3Regs.AQCTLA.bit.CAU = AQ_SET; / Set PWM3A on event B, up count EPwm3Regs.AQCTLA.bit.CBU = AQ_CLEAR; / Clear PWM3A

29、on event B, up count其中红色的为PWM的输出方式配置，当PWM1.A在counter=CMPA时，输出为1，在counter=CMPB时，且在向上计数，输出为0，也就是计数在CMPA与CMPB之间时输出为1；模式四： EPwm3Regs.AQCTLB.bit.ZRO = AQ_TOGGLE; / Toggle EPWM3B on Zero此模式强制整个周期输出高或者输出地，与CMPA与CMPB无关，关于28016PWM死区时间配置的讨论主要与死区有关的是三个寄存器：Dead-Band Generator Control Register (DBCTL)；Dead-Band Generator Rising Edge Del