amescon RasPiComm Kullanıcı Kılavuzu - Sayfa 6

I/O Sistemleri amescon RasPiComm için çevrimiçi göz atın veya pdf Kullanıcı Kılavuzu indirin. amescon RasPiComm 7 sayfaları. Extension board for the raspberry pi single-board computer

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4.2. Serial Port / RS-232

By default the RS-232 port is used by the Raspberry Pi's startup routine and needs to be reconfigured

for use. The setup script does so automatically. Please note that a restart is required, after which you

can use standard libraries to access the serial port. The device name is:

/dev/ttyAMA0

Example code for C or C++:

int fd = open("/dev/ttyAMA0", O_RDWR | O_NOCTTY | O_NDELAY); ...

Our

Sample Applications

/dev/ttyRPC0 by its RS-232 counterpart /dev/ttyAMA0.

4.3. Joystick

The joystick is mapped to the following GPIOs:

1. 4 = right side (towards HDMI)

2. 22 = push

3. 23 = bottom side (towards power connection)

4. 24 = left side (towards audio out)

5. 25 = top side(towards usb)

You can use linux standard libraries to access the joystick in the same way as the serial port.

Example code for C or C++:

int fd = open("/sys/class/gpio/gpio22/value", O_RDONLY); ...

4.4. Outputs (LEDs)

The Output is mapped to the following GPIOs:

Output 1 (D1): GPIO 18

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Output 2 (D2): GPIO 21 (Raspberry Pi rev.1) or GPIO 27 (Raspberry Pi rev.2)

•

amescon

Manual

can be adapted for use with the RS-232 port by replacing the RS-485 name