ZBasic Forum

Hello Vic, Welcome to the world of RS-232... As you begin working with serial communications it is worth noting that for many applications ONLY the Ground, Tx, and Rx are needed, and you may not need to work with the handshake signals at all. This certainly simplifies both the hardware, and the soft...

Dave, thank you for the input. It appears (perhaps) that the system enumerated only up through port 9. The device manager, however, lists several bluetooth drivers, and the USB port, extending up through port 20. Hyperterminal lists and opens the port, and communicates without difficulty, on port 20...

Yes, I would store about 25 mSec of data, about 100, 2 byte values, in the ZX-24's RAM, post process, and upload the data to a PC. No EEPROM or other slow device. A higher sampling rate would be nice, but 4 ksps meets the minimal requirements. I am just not sure what one might expect speed wise usin...

I am interested in obtaining 10 or 12 bit A to D samples at a rate of 4 k Samples per Second, or more. I am considering adding an SPI compatible AtoD such as National Semi's ADC121SO21 (50-200 ksps, 12 bit, 5 BV) to a ZX-24. I want to dump the samples into an array, and then process them after the s...

Sign me up also, I can certainly use 2 HW SPs.
JC

Yup, I've experienced it also. Makes me save a lot more, and not touch the cursor ntil the verify is complete. XP, SP2.
JC

Black / Clear plastic printed disks work best with a transmissive system, where the Black is opaque, and the Clear lets the signal through. For a reflective system you have to be careful that the material of the disk itself, and the pigments painted on it, don't reflect back too much signal themselv...

Hi Tony, Do you have a copy of the SanDisk MultiMediaCard and Reduced-Size MultiMediaCard Product Manual? I have V1.0, (May, 2004), and can email it to you if you do not have this reference. Likewise for the SanDisk MultiMediaCard Techinical Reference Application Note, V1.0 (Oct. 2003). Newer versio...

The first time I worked with MMC cards was several years ago, then it sat on back burner until I nneded it again. I tried extensively to do single byte and < 512 block writes without success. The San Disk manual was contradictory in this regard. A table implied that it was possible, the text, and a ...

Hi Tony, I do not have my notes before me... I was data logging GPS data, mixed with some other inputs, and storing it on an MMC card. I used my own bit banged (slooow) interface, which I believe is posted on the forum. The SD/MMC requires a 512 byte block of data to write to the card, one can not w...

Hi Tony, My uncle used to rally extensively around Boston. His wife drove, he calculated, (being radar engr for Ratheon). If I recall his stories, he had a ticker in line in the speedometer cable giving a switch closure every x tire rotations. He used an HP45 calculator, and a couple of stop watches...

The new hardware options look great. For myself, backwards compatibility and BX compatibility are not an issue. Speed is, particularly when running multiple tasks, which is one of the greatest features of your product line! I now have a wider selection from which to chose the cpu for new projects, w...

Sounds like an interesting project. Glad you have a new O-scope. This may be obvious, but it may also be worth mentioning: 1) Your scope probes, and the front end of the scope, may themselves be tunable. The old Techtronic scopes had a scope calibrator built into the scope specifically to adjust the...

Some more info would help to determine your possible options. Do you need / want a DOS compatible FAT file structure? Having one allows your MMC/SD card to be read by a PC. If you are simply storing data bytes, to be read back and uploaded via the micro, than a FAT may be overkill. Do you need to ha...

Don's suggestion is a good one. Another alternative is to use a separate serial to parallel LCD Driver. Most 2 line text LCDs either use the HD44780 controller, or a compatible variant. It is, essentially, the de facto standard. This only requires 1 port, (serial TTL output) to the driver chip, whic...