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ADZS-BF561-EZL... ***
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ADSP-BF533SKBC... 138.00
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AD676KD 特价
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AD-DSP芯片及开发工具的常见问答
发布时间:2006-11-23 阅读:10078

1. DSP25322: What are the differences between ADSP-218x and ADSP-2116x DSPs? How do I port code from ADSP-218x to... (Jan 2004)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
Please refer to the attachment for the key differences between ADSP-218x and ADSP-2116x and for code porting instructions.

 

 

2.

DSP28280: Why won't my emultor work after I install VisualDSP++ 3.5?... (Feb 2004)  
Questions & Answers | HTML  (32.0K) | added Nov. 22, 2006
The emulation tools are now included in the base VisualDSP++ installation. There is no longer a second ICE software installation procedure. To install emulation support, select the appropriate components in the …


3. DSP06343: I am looking at the tHBGRCVS timing parameter in the SHARC data sheet in the pages that have to do w... (Jun 2000)  
Questions & Answers | HTML  (31.7K) | added Nov. 22, 2006
The state of RD, WR and CS is ignored for a maxium of 20+5DT/4 ns after the output HBG becomes valid. Note 3 in the data sheet warns that for the first asynchronous access, you do not have to have a non-Multiprocessor …

4. DSP28681: Are there any wireless telecommunication platforms available using Blackfin Processors?... (Feb 2004)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
Please see the Softfone for EDGE platform information available at the following link:


5. DSP06604: How do I know if I have to register my VisualDSP software to get a permanent license?... (Mar 2004)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
All VisualDSP software tools should be registered.

You can register online at



10. DSP06412: I am interested in designing with the ADSP 2104 but I am a bit confused on how to use boot pages to ... (Dec 2000)  
Questions & Answers | HTML  (36.7K) | added Nov. 22, 2006
The ADSP-2104 has 512 words of internal program memory RAM. The RAM can be initialized automatically through the boot memory interface. Through this interface, an industry standard byte-wide EPROM can be directly …

 

 

11. DSP06398: Can I change the ADSP-21xx SPORT (Serial Port) settings on the fly?... (Jun 2000)  
Questions & Answers | HTML  (31.0K) | added Nov. 22, 2006
We do not recommend changing the SPORT settings on the fly. To make changes to SPORTs use the following steps:
  1. disable the SPORT
  2. make the changes
  3. enable the SPORT

12. DSP21758: I just upgraded to a new High Performance PCI ICE and it fails the ICE TEST when determining the sca... (Dec 2003)  
Questions & Answers | HTML  (32.5K) | added Nov. 22, 2006
The SUMMIT ICE may have worked because the TCK clock signal runs continuously with the SUMMIT ICE, whereas the HPPCI ICE only activates TCK during scans controlled by the HPPCI ICE itself. This could be a critical …

13. DSP21911: Are there any special considerations or general recommendations for design of systems which will mak... (Sep 2003)  
Questions & Answers | HTML  (33.1K) | added Nov. 22, 2006
For designs that will use the ADI's High Performance PCI
In Circuit Emulator (HPPCI-ICE), be aware that the TCK
signals needs to be buffered properly. During initial setup
the HPPCI-ICE can be user programmed to…

14. DSP06684: Where do I find the utility to reload the flash in the ADSP-21160 EZ-Kit? (Jan 2002)  
Questions & Answers | HTML  (33.3K) | added Nov. 22, 2006
There is a utility included with the ADSP-21160 EZ-Kit software called EZFLASH.EXE which will perform FLASH programming for you with any valid ASCII format loader file (.LDR) created with VisualDSP. The EZFLASH.EXE …

15. DSP06646: How does the ADSP-219x pipeline impact code execution?... (Dec 2002)  
Questions & Answers | HTML  (31.4K) | added Nov. 22, 2006
There is a 6-stage instruction pipeline on the ADSP-219x processors: Look-ahead, Pre-fetch, Fetch, Address generation, Decode, and Execute. For more details please refer to

16. DSP06357: I am using the loader utility of the VDSP4.x for the ADSP-21000 family DSP to generate a loader file... (Dec 2000)  
Questions & Answers | HTML  (31.2K) | added Nov. 22, 2006
The loader outputs an ASCII file with bits in following order: lower 16 bits--->medium 16 bits------>upper 16 bits.

17. DSP23699: What is the scope of the .PRECISION directive in the VisualDSP/VisualDSP++ SHARC assembler?... (Dec 2003)  
Questions & Answers | HTML  (31.2K) | added Nov. 22, 2006
The .PRECISION directive is used to give precision information to the assembler for the data section. It is found only in the SHARC floating point processor assembly language. The precision directive with a given value …

18. DSP06630: I have a multiprocessor ADSP-21065L system with a shared SDRAM. Can you explain the functionality o... (Jun 2001)  
Questions & Answers | HTML  (31.9K) | added Nov. 22, 2006
Two SDCLKx signals are provided as buffering for multiple SDRAMs connected in parallel. For example, you can use SDCLK0 with half of the SDRAMs and SDCLK1 with the rest. They can be activated independently and are used …

19. DSP06672: How does the dynamic power management feature of the ADSP-21535 Blackfin DSP work?... (Jan 2002)  
Questions & Answers | HTML  (31.3K) | added Nov. 22, 2006
In a standard DSP application, you would have a standard regulator supplying a static 1.8v or 1.5v to the DSP core. The dynamic power management feature of the ADSP-21535 allows the DSP core the ability to tell the …

20. DSP28746: I've just upgraded my Blackfin VisualDSP++ tools to version 3.5 and my project no longer builds. I ... (Feb 2004)  
Questions & Answers | HTML  (32.9K) | added Nov. 22, 2006
Previous to VisualDSP++3.5, there was a generic CPLB configuration table for each of the Blackfin processors. The CPLB information was automatically linked into the C run-time so that cache initialization would be …

 

 

21. DSP18099: How do I migrate from the ADSP-21xx to the ADSP-218x?... (Feb 2003)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
To migrate from the ADSP-21xx to the ADSP-218x, please refer to EE-48 (Converting Legacy 21xx systems to A 218x system Design).

The EE note can be found at our

22. DSP24237: If I attempt to load code into bank0 of the ADSP-21065L EZ-kit lite board's external memory, I get a... (Nov 2003)  
Questions & Answers | HTML  (33.3K) | added Nov. 22, 2006
If you are working with the ADSP-21065L EZ-kit lite board, then by default, the external SDRAM is connected to Memory Select 3 (/MS3). Hence the SDRAM is mapped to external memory bank3. When you load try to load the …

23. DSP24812: How can one connect an EPROM and SRAM interface for ADSP-2181 in the BDMA space?... (Jan 2004)  
Questions & Answers | HTML  (32.6K) | added Nov. 22, 2006
If the application requires access to the external EPROM at boot time and external SRAM after the boatload, one would need some logic to select the EPROM during booting and the SRAM during runtime. There is no way to …

24. DSP25329: Which signals are used to hook up a SDRAM to the ADSP-BF53x? How are the devices configured? What'... (Dec 2003)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
While direct connections are not detailed in the datasheet specirically, you can look at the ADSP-BF533 EZ-KIT Lite schematic to see how we connect the SDRAM and Flash to the processor.

25. DSP25341: How do I make use of the 40-bit extended precision in my TigerSHARC C code?... (Jan 2004)  
Questions & Answers | HTML  (32.0K) | added Nov. 22, 2006
IEEE 40-bit extended precision is not directly supported in the TigerSHARC C/C++ compiler.

Basically, there is no 40-bit data type in C to support this. You must use assembly to implement extended precision …

26. DSP28230: Is there a port of the uCOS-II RTOS for the ADSP-BF533?
... (Feb 2004)
  
Questions & Answers | HTML  (31.0K) | added Nov. 22, 2006
Yes. Here is the link to get the ADSP-BF533 port:


27. DSP06510: I am using a 24MHz crystal in my ADSP-218x design. I notice that after reset and before code is loa... (Oct 2000)  
Questions & Answers | HTML  (31.9K) | added Nov. 22, 2006
No, this is improper behavior. It is likely that the DSP is not coming out of reset properly. After power-up, the PLL (phase locked loop) is syncing up. If reset is pulled high too soon, the PLL will not be locked and …

28. DSP18476: Does Blackfin support hardware interlock?... (Apr 2003)  
Questions & Answers | HTML  (33.2K) | added Nov. 22, 2006
Yes! Blackfin does support hardware interlock. In the execution of instructions, the Blackfin architecture implements an interlocked pipeline. For example, when a load instruction executes, the target register of the …

29. DSP18087: I use the EZ-KIT (ADSP-21061/ADSP-21065L) without an emulator for debugging. When I load code, VDSP ... (Feb 2003)  
Questions & Answers | HTML  (32.2K) | added Nov. 22, 2006
Using RS-232 interface, the

30. DSP06429: I'm trying to use the PROM Splitter to create an EPROM boot-loadable file for one of the ADSP-218x D... (Dec 2000)  
Questions & Answers | HTML  (31.1K) | added Nov. 22, 2006
For all of the ADSP-218x DSPs you should include the -loader and the -2181 switch in the command line. For example: sp121 infile outfile -2181 -loader

 

 

31. DSP06589: I use the build all button in SHARC VisualDSP to build a simple project and I encounter "Error E2007... (Feb 2001)  
Questions & Answers | HTML  (34.3K) | added Nov. 22, 2006
If you are trying to build a project which only consists of assembly code (no C code), then all you will need to do to overcome this issue is to revise your LDF file so that it does not include files which are only …

32. DSP06447: What is the telephone number for your Literature Center and what literature is available?... (Jun 2000)  
Questions & Answers | HTML  (32.2K) | added Nov. 22, 2006
You can contact our Literature Center by calling: 1 800 ANALOG-D option 2 At the Literature Center, we stock an assortment of literature that changes as new products are released and old products become obsolete. The …

33. DSP06530: My system uses the ADSP-2185 and I am trying to use ADDR13:8 for I/O address decoding. When I assert... (Dec 2000)  
Questions & Answers | HTML  (32.0K) | added Nov. 22, 2006
One of the main differences between the ADSP-2181 and the ADSP-2185 is that the ADSP-2185 is dual mode. If you set pin Mode C = 1, then you are in Host memory mode. In that mode, only A0 is available (IOMS operates …

34. DSP06637: I'm using the VisualDSP++ simulator together with an ADSP-21160. Where can I configure the different... (Jul 2001)  
Questions & Answers | HTML  (31.3K) | added Nov. 22, 2006
In hardware, you configure the pins CLK_CFG3-0 to setup the core/CLKIN ratio. The state of those pins are captured in the CRAT bits in the SYSTAT register. In the simulator, you can change these bits to represent the …

35. DSP06490: Oversampling (Dec 2000)  
Questions & Answers | HTML  (33.8K) | added Nov. 22, 2006
It is possible to use decimation filters to step down the sampling rate and divide the filtering task into several stages. This will require less computation time and fewer overall filter taps than a direct …

36. DSP06404: I want to interface a 3.3 V ADSP-21xx processor to a 5 V device. Can I connect the DSPs' outputs to ... (Jun 2000)  
Questions & Answers | HTML  (31.5K) | added Nov. 22, 2006
No, you can't connect these devices directly. If you review the ADSP-21xx data sheet, you can see that you must shift the voltage levels of the outputs from the 5 V device to 3.3 V with a quick switch (manufactured by …

37. DSP06426: I'm having trouble loading my C source code into the debugger. What could be the problem?... (Dec 2000)  
Questions & Answers | HTML  (30.9K) | added Nov. 22, 2006
For the debugger to work correctly with C source code, you must run the compiler with both the -g and -save-temps switch.

38. DSP06519: I am using Release 6.1 of the ADSP-218x software tools. I noticed that the simulator does not suppo... (Dec 2000)  
Questions & Answers | HTML  (31.3K) | added Nov. 22, 2006
To simulate an ADSP-2189M (using Release 6.1) you should create an ADSP-2181 session. This will work for any of the 218x family members. A consistent set of names will be available in VisualDSP 7.0 release.

39. DSP25363: I am trying to write C code for the Blackfin and am having trouble placing interrupt service routine... (Dec 2003)  
Questions & Answers | HTML  (34.8K) | added Nov. 22, 2006
In the event that a user wishes to place an ISR into a specific section of memory, there is a certain way of doing it in order to work properly with the compiler. The EX_INTERRUPT_HANDLER, EX_EXCEPTION_HANDLER, or EX_…

40. DSP18870: Example programs such as BP.dpj (BandPass) or TT.dpj (TalkThru) that require user input via Mic In a... (Dec 2003)  
Questions & Answers | HTML  (31.7K) | added Nov. 22, 2006
Detailed below are a number of likely solutions:

1. Commonly available PC microphones with ~2K ohms output impedance and sensitivity of -50 dB will not work, while ones with ~400-500 ohms output impedance and …

 

 

41. DSP06707: How do I decipher Analog Devices' DSP part numbers and find information about DSP packaging?... (Jan 2003)  
Questions & Answers | HTML  (31.3K) | added Nov. 22, 2006
This information can be found on the Analog Devices web site section under

42. DSP06674: Is the Blackfin DSP family code-compatible with the 21xx family of processors?... (Jan 2002)  
Questions & Answers | HTML  (30.9K) | added Nov. 22, 2006
The Blackfin DSP family is based on a new architecture with a new instruction set. As such, it is not code-compatible with the ADSP-21xx family.

43. DSP06687: On the SHARC DSPs, if an interrupt occurs, but interrupts are not enabled (IRPTEN bit is not set in ... (Jan 2002)  
Questions & Answers | HTML  (31.6K) | added Nov. 22, 2006
If IRPTEN is 0 and an interrupt comes in, it will still be latched in IRPTL. It will stay latched unless it is specifically cleared from IRPTL. If IRPTEN becomes enabled at a later time, the interrupts that have been …

44. DSP06457: Q. VDD & GND Pin Recommendations For The ADSP-2101 (recommendations also can apply for other ADSP-21... (Jun 2000)  
Questions & Answers | HTML  (36.1K) | added Nov. 22, 2006
The only general suggestion for physical placement of the ADSP-2101 on your board is to place it so that as many connections as possible are as short as possible. You may have to make tradeoffs depending on what your …

45. DSP06661: How can I connect my 2116x or SHARC link ports to the TigerSHARC link ports?... (Nov 2001)  
Questions & Answers | HTML  (31.0K) | added Nov. 22, 2006
You cannot connect the SHARC link ports to the TigerSHARC link ports. The TigerSHARC link ports have different physical connections and timing parameters. They use a different handshaking protocol.

46. DSP25073: The g21 compiler does not support the #pragma align directive. If the compiler does not support this... (Jan 2004)  
Questions & Answers | HTML  (33.1K) | added Nov. 22, 2006
To place a buffer or an array starting at a particular location in the internal memory of the DSP, a section is first created in the .C file of the project. Then, the Linker Description File (.ldf file) used for the …

47. DSP06600: I have one SHARC with ID=0 connected in my system. I noticed that the CRBM (Current Bus Master) bit ... (Mar 2001)  
Questions & Answers | HTML  (31.0K) | added Nov. 22, 2006
No, this is not a bug. If the ID of the DSP is 0, the CRBM bit will always be 1.


49. DSP06644: How is Multiplier/Accumulator in the ADSP-219x different from 218x? Please explain in detail.... (Aug 2001)  
Questions & Answers | HTML  (31.4K) | added Nov. 22, 2006
The MAC unit in the ADSP-219x family is identical to the MAC in the ADSP-218x except it does not have the MF register. The advantage in the ADSP-219x is that the shifter result register, SR, can be used as an additional …

50. DSP06392: I have an ADSP-2100 family DSP on a board that I have been producing for a while. My board works fin... (Jun 2000)  
Questions & Answers | HTML  (34.4K) | added Nov. 22, 2006
You may be seeing problems that are related to questionable practices for high-speed board design (practices that cause signal integrity problems). There are a few things to check out in determining whether this is a …

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