From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2006-03-08 11:44:09
On Wed, Mar 08, 2006 at 02:31:16AM -0600, Jim Brain wrote: > I prefer not to wire directly to my very expensive laptop parallel > port. While it is possible, I would never recommend such a risky move > to someone, as if they fry their port, they'll come yelling for me. Right, it is better to be safe than sorry. > So, a 74LS245, perfboard, DB25, 2 2x5 headers, 2 2x5 female ribbon cable > plugs, and a bit of 10 conductor ribbon cable looks to run ~ USD$5.00. > Still mighty cheap, in my opinion. Yes. My point was that if the device is going to have a computer interface, one could arrange the interface in such a way that it can also used for programming the microcontroller. I did that in the C2N232 and in the infrared-wakeup circuit I made for my digital TV receiver/recorder based on VDR (http://www.cadsoft.de/vdr/). In the C2N232, the programming interface is RS-232 bitbanging with RTS,CTS,TxD and RxD. In the latter circuit, I use a 2x6 header that is compatible with the 2x5 header of the Atmel programming cable (of the STK200 dongle). Marko Message was sent through the cbm-hackers mailing list
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