Struct UemCommandsReader 

pub struct UemCommandsReader<'a> { /* private fields */ }

Structure for commands controlling a reader itself

Implementations

impl<'a> UemCommandsReader<'a>

pub fn beep(&mut self, count: u8) -> UemResult

Make short sound signals of specific count

Arguments

• count - Number of beeps to perform

Returns

Ok(()) on success, otherwise returns an error.

Example

// Beep 5 times
if uem_reader.commands().reader()
    .beep(5)
.is_err() {
    return;
}

pub fn led( &mut self, count: u8, color: UemColor, post_color: UemColor, ) -> UemResult

Blink count times with led of specific color and remain with other color switched on

Arguments

• count - Number of blinks to perform
• color - color to blink with
• post_color - color to leave on

Returns

Ok(()) on success, otherwise returns an error.

Example

    UemReaderInternal,
    usb::find_usb_readers};
// Blink 3 times with green and remain yellow
if uem_reader.commands().reader()
    .led(3, UemColor::Green, UemColor::Yellow)
.is_err() {
    return;
}

pub fn power_radio(&mut self, on: bool) -> UemResult

Turn radio chip on

Arguments

• on - true if needed to power on the radio, otherwise false

Returns

Ok(()) on success, otherwise returns an UemError.

Example

let mut uem_cmds = uem_reader.commands();
let mut uem_cmds_reader = uem_cmds.reader();
if uem_cmds_reader.power_radio(true).is_err() {
    return;
}

pub fn radio_off_on(&mut self, duration: u16) -> UemResult

Switch radio field off for a specified duration

By switching off radio field, cards in the field are beind unpowered and thus reset.

Arguments

• duration - Number of milliseconds to switch off radio field. If set to 0, the field will be switched off permanently. The field can be switched on again with the same command and non-zero duration.

Returns

Ok(()) on success, otherwise returns an error.

Example

// Switch off radio for 10 ms
if uem_reader.commands().reader()
    .radio_off_on(10)
.is_err() {
    return;
}

pub fn get_version(&mut self) -> UemResultVec

Read reader version

Reader version is a 6 bytes vector

Returns

Ok(Vec<u8>) containing the version, otherwise UemError.

Example

match uem_reader.commands().reader()
.get_version() {
    Ok(ver) => assert_eq!(ver.len(), 6),
    Err(err) => {
        uem_reader.close();
        println!("{:?}", err);
        assert!(false);
    }
}

pub fn get_serial(&mut self) -> UemResultVec

Read reader serial

Reader serial is a 4 bytes vector

Returns

Ok(Vec<u8>) containing the serial, otherwise UemError.

Example

match uem_reader.commands().reader()
.get_serial() {
    Ok(ser) => assert_eq!(ser.len(), 4),
    Err(err) => {
        uem_reader.close();
        println!("{:?}", err);
        assert!(false);
    }
}