Eurotech ZEUS Manual do Utilizador descarregar pdf (Página 52)

Arcom Embedded Linux Technical Manual Developing software for AEL

The functions provided by libaim104 on AIM104-MULTI-IO are explained below:

Function Explanation

aim104_multi_io_inputs

Returns the status of the 8 digital I/O lines as a

bit mask.

aim104_multi_io_ADC

Returns a value read from one of the ADC

inputs. For an ADC input connected in single

ended mode single_ended must be set to

true/non-zero and channel must be between 0

and 15 inclusive. For an ADC input connected

in differential mode, single_ended must be set

to false/zero and channel must be between 0

and 7 inclusive.

aim104_multi_io_DAC

Writes the 12 bit unsigned value (0-4095)

output to DAC channel 0 or 1.

Transferring files to and from the target board via a serial connection

If you want to transfer a relatively small file to or from a target board running Linux

without setting up an Ethernet connection, you may want to do it via the serial line.

If you have many files to transfer or the files are large, we recommend you

configure an Ethernet connection and use the scp tool as described in Secure

Shell

, page 24. A serial connection typically runs at less than 115200 kilobits per

second, compared with up to 10 or 100 megabits per second for an Ethernet

connection.

AEL includes the lrzsz utility, which is capable of performing X-, Y- and Z-modem

transfers over a serial line. The protocol you choose depends on the protocols

supported by your terminal emulator. If possible, use Z-modem in preference to Y-

modem, and use X-modem only if nothing better is available. Z- and Y-modem are

capable of transferring multiple files in one session, while X-modem can only transfer a

single file at a time.

Before transmitting or receiving the file, you must run the appropriate utility on the target

system. The following table describes X-, Y- and Z-modem transfer utilities:

Protocol Receive on the target system Transmit from the target system

Z-modem rz sz [FILES...]

Y-modem rb sb [FILES...]

X-modem rx [FILE] sx [FILE]

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 71 72

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Eurotech ZEUS Manual do Utilizador Página 52