My apology if this showed up two or three times. I thought I posted previously but it didn't show up. Han, If you plan to use any method which programs via the JTAG/OnCE port, you are limited by the 535 words per second max speed which is quoted in the application note. These methods include A) the straight parallel port cable B) using DSPCOMMPARALLEL (which is I assume what you mean by saying "DSPCOMMAND") hooked to the JTAG/OnCE port or C) using DSPCOMMANDPCI hooked to the JTAG/OnCE port. For fastest download speeds via the JTAG/OnCE (knowing that the maximum possible speed is 535 words per second), you should use option C) with option A) and B) being your second choice since they will not maximize the JTAG/OnCE speed. If you are using a non-JTAG/OnCE method to program the flash, such as the serial bootloader which uses the serial port to program the flash, you can possibly increase the maximum 535 words per second maximum speed which limits you using the JTAG/OnCE. All the necessary software is provided by the SDK, you would just need to educate yourself as how to use this application. The Bulk device programmer and Parallel programming mode method mentioned in the application note can increase your efficiency as well but are extremely more difficult to implement. The Bulk device programming method requires a device loader to implement which not every customer has or owns. The Parallel programming mode requires a total of 49 pins to be driven or read from the DSP568xx chip which requires considerable planning and sacrifice from the target board. So, that is why, in the long run, many people choose the JTAG/OnCE method for debugging and programming because of its convenience and relatively good speed. Given this information, I will now answer your questions........ 1) How can I increase the speed of the download? ANSWER> If you are currently using the straight parallel cable or the DSPCOMMPARALLEL, you can go to a DSPCOMMANDPCI and see some performance in speed. 2) If I use DSPCOMMAND will my download time be faster? ANSWER> It will only be faster if you use the DSPCOMMANDPCI. The performance using the straight cable and DSPCOMMPARALLEL will be the same. 3) Is DSPCOMMANDPCI download time is faster than DSPCOMMAND? ANSWER> Yes. 4) What is the benefit of DSPCOMMAND and DSPCOMMANDPCI against straight cable? ANSWER> The benefit of using DSPCOMMPARALLEL and DSPCOMMANDPCI against the straight cable is that in most customer's end applications they will not have the space on their board to implement an onboard parallel port command converter (which is implemented on the EVM's for ease of use). Therefore, to debug their end-application it is helpful to have a DSPCOMMPARALLEL or DSPCOMMANDPCI since most end-application boards can implement the 14 pin JTAG/OnCE header necessary to communicate. 5) Is there tird party manufacturer for DSP for hardware development tool? ANSWER> Not that I know of. |