Swordfish

Swordfish clock frequencies ARE in MHz. I just brought up the RTC crystals because your example corresponds the standard crystal frequency in KHz used with them. Sorry for the confusion. Swordfish takes care of all the timing issues as long as the crystal is within the specified ranges. I would haza...

The Swordfish Help files include a lot of information that is not in any of the printed documentation. Searching on CLOCK, I found the floowing answer to your question: "The crystal frequency of a device can be represented as a floating point number. For example, clock = 3.2768 This can be extremely...

It's all handled behind scenes, but it depends on the correct clock frequency being specified.

I don't know if it can work for ANY clock frequency, but I do know it works fine with a 20 MHz crystal.

I believe you're asking about how to make the bootloader automatically do a reset to download the hex file? The MCLoader (supplied with Swordfish) uses the RS-232 signal DTR to trigger a reset. A schematic is in the MCLoader docmentation file. (I can't figure out how to upload a picture - grrrr) Jon...

One thing I found recently...... If you use a variable name as a port pin: dim LED as PORTB.0 and then do something like: LED = 1 LED = 0 You won't see any change on the port pin. If you add a lin near the top of the program: HIGH (LED) or LOW(LED) the above works fine. I believe the added HIGH or L...

I used to use the Olimex USB programmer. It was a constant headache trying to get the thing to work. The USB interface was never recognized from one session to the next and always took a few delete/re-install/reboot cycles to get it connected again. Regarding this problem, there is a jumper for usin...

Steven,

This upgrade did the trick for me too in trying to determine some intermittent communications with a TI I2C chip. Thanks for the great support.


Jon

I don't believe the free Swordfish SE edition provides USB support.

I am currently working on a project with USB on a 18F2550 and it's working great! The HID interface is awesome. Plug in the hardware, start the software and it just works.

Jon

If I have two structures, say A and B, and I define variables One, Two, Three, etc under each structure, are those variables independent? Does setting A.One to a value have any effect on B.One? I'm having some problems with recent program changes, and wondering if that's where the strangeness is com...

The problem is solved. I used a friend's PICKit 2 programmer to erase and reload the boot loader into 3 parts. Two of them work fine and the 3rd actually has a bad memory location reported by the PICKit software. For some reason, my Olimex PICStart+ clone can't erase the chips. It's always been a pa...

You may have to disconnect the display to use ICSP, as it uses 2 bits of the B port. With the GLCD databus connected to the B Port, it may be loaded down too much to function. If available, using a different port for the GLCD might be better.


Jon

I'm having a problem once in a while using the boot loader with an 18F4550. The boot loader with work fine for anywhere between a handful of load cycles and a hundred or more but once in a while it hangs up during the load process. This might be WinXP delaying the data transfer but I'm not sure. Mos...

An easy way to clear the screen or invert the screen is to create a screen-size graphic and use the setimage command. If the screen has static information (like a title and boxes for example), creating a graphic with everything on it may be faster than redrawing the screen each time it's cleared. Jon

WalMart has some "key chain" photo frames....I think they have a 96 x 96 color display, approximately 1" square. They cost something like $15!

From what I've seen, they are USB, but they don't behave as a standard USB memory device....they require special software to load pictures I believe.

Jon

Octal Wrote: I received my EasyMP3 Board 10 days ago and I was thinking to write such a driver in order to read some mp3 files. The idea was to reuse Steven SD driver as a storage board for mp3 files with it to make an automatic audio reminder. I'd be very interested in this. I've been thinking of b...