UART access does not - ME SDK 8
I'm looking to receive data via the UART on a Bill pro forma raspberry with Java ME 8 (new installation to the latest version).
I changed the file/etc/inittab on the invoice, pro forma:
#Spawn a getty on line series Raspberry Pi
# below is commented to support access UART in Java ME
#T0:23:respawn: / sbin/getty - L ttyAMA0 115200 vt100
as well as the /boot/cmdline.txt:
dwc_otg.lpm_enable = 0 console = tty1 root = / dev/mmcblk0p2 rootfstype = ext4 lift = date limit rootwait
as stated in the Raspberry Pi Getting Started Guide.
I tried to create a new instance of UART via DeviceManager:
UART = DeviceManager.open (40) (UART);
This produces a DeviceNotFoundException ('device 40 not found'). I used 40 because this is the ID of UART device listed in the Getting Started Guide.
I also tried to create a new instance of the UART using a UARTConfig:
public void startApp() {}
System.out.println ("startApp ()" + "");
uartEventHandler = new UARTDataAvailableEventHandler();
create a basic config UART
UARTConfig uartAdHocTemplate = new UARTConfig)
DeviceConfig.DEFAULT,
DeviceConfig.DEFAULT,
9600,
UARTConfig.DATABITS_8,
UARTConfig.PARITY_NONE,
UARTConfig.STOPBITS_1,
UARTConfig.FLOWCONTROL_NONE,
(100, 100);
try {}
UART = DeviceManager.open (uartAdHocTemplate) (UART);
If (uart! = null) {}
uart.setEventListener (UARTEvent.INPUT_DATA_AVAILABLE, uartEventHandler);
}
} catch (IOException ex) {}
Logger.getLogger ((TestUART.class.getName ())) .log (Level.SEVERE, null, ex);
}
System.out.println ("startApp () '-'");
}
The handler is defined as:
/ public class UARTDataAvailableEventHandler implements UARTEventListener {}
@Override
{} public void eventDispatched (UARTEvent event)
System.out.println ("received a UART event.");
}
}
It works but eventDispatch to the event handler method is never called.
The application has a UART permission set: jdk.dio.uart.UARTPermission "*: *" 'open '.
The serial data is sent by a radio XBee module - I checked with a logic analyzer that the expected data is sent to the RXD pin on the map of derivation Pi Shoemaker.
Thank you
Luther
The application was launched on the EmbeddedDevice1 emulator. Running on the invoice, pro forma raspberry registered the INPUT_DATA_AVAILABLE event fired.
Tags: Java
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