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Linux c serial port example2/18/2023 ![]() ![]() Schematic of a RS232 interface with a MAX3232 (3.3v to RS232) You need to interpose a simple circuit based, for example, on a MAXIM MAX3232 for level translation and inversion as shown below: This means that is NOT possible to connect directly the console port of the FOX with simple wires to the serial port of a PC. These port pins come directly from the Axis MCM ETRAX 100LX processor pins, so the electrical levels are TTL compatible, with levels between ground and +3.3 Volts. ![]() The FOX Board has two serial port on its J6 connector. Using serial ports in C In this article we will show how to interface the TTL serial ports /dev/ttyS2 and /dev/ttyS3 available on the J6 connector with real RS232 devices PLEASE NOTE: This article is obsolete or related to a discontinued product.
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