Stuart McLachlan
stuart at lexacorp.com.pg
Tue Sep 26 15:48:43 CDT 2006
On 26 Sep 2006 at 15:41, Lembit Soobik wrote: > thank you , Stuart, > the microprocessor side is not that difficult. > The problem is, how to write/read the USB port from the PC side without > needing to develop a driver or such. You don't need to. The cables generally come with drivers which make them look like standard serial connections. As an example, I run CMap on my laptop on a boat with a Garmin 76 GPS. Th GPS has a standard serial interface, my laptop doesn't have an serial port and the CMap software doesn't know anything about USB ports, it only knows how to interface to a Com1: to Com4:. When I plug my GPS to my laptop usin the adapter cable, the GPS thinks it is talking over a standard RS323 interface and CMap thinks that it is reading/writing on Com2: (my laptop thinks that the built in modem is sitting on Com1:) -- Stuart