com.webos.service.peripheralmanager

API Summary

The peripheralmanager is a service to provide APIs to monitor sensors and control actuators connected to I/O peripherals using industry-standard protocols.

Currently, supported protocols are UART ,GPIO, SPI and I2C.

This service manages parallel requests from multiple applications to access peripherals and control the hardware.

Overview of the API

Methods

gpio/list

ACG: peripheralmanager.query

Description

Provides the list of available GPIO pins in the target hardware.

Parameters

Name	Required	Type	Description
subscribe	Optional	Boolean	Indicates if subscribed to get notified when there is a change in available pins. Possible values are: true: Subscribed for notifications. false: Not subscribed. Default: false

Name

Required

Type

Description

Optional

Boolean

Indicates if subscribed to get notified when there is a change in available pins. Possible values are:

true: Subscribed for notifications.
false: Not subscribed.

Default: false

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
subscribed	Optional	Boolean	Indicates if subscribed to get notifications. Possible values are: true: Subscribed for notifications. false: Not subscribed.
gpioList	Optional	Object array: gpioList	List of available GPIO pins with the status.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example without Subscription

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/list '{}'

Response:

{
"subscribed":false,
"returnValue":true,
"gpioList":[
{
"pin":"gpio12",
"status":"available"
},
{
"pin":"gpio13",
"status":"available"
},
{
"pin":"gpio16",
"status":"available"
},
{
"pin":"gpio17",
"status":"available"
},
{
"pin":"gpio18",
"status":"available"
},
{
"pin":"gpio19",
"status":"available"
},
{
"pin":"gpio20",
"status":"available"
},
{
"pin":"gpio21",
"status":"available"
},
{
"pin":"gpio22",
"status":"available"
},
{
"pin":"gpio23",
"status":"available"
},
{
"pin":"gpio24",
"status":"available"
},
{
"pin":"gpio25",
"status":"available"
},
{
"pin":"gpio4",
"status":"available"
},
{
"pin":"gpio5",
"status":"available"
},
{
"pin":"gpio6",
"status":"available"
}
]
}

gpio/open

ACG: peripheralmanager.gpio.operation

Description

Opens the GPIO pin, if not already opened by other applications.

Parameters

Name	Required	Type	Description
pin	Required	String	ID of the pin.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/open ' {"pin":"gpio4"}'

Response:

{
"returnValue": true
}

gpio/getDirection

ACG: peripheralmanager.query

Description

Returns the direction of the required GPIO pin.

Parameters

Name	Required	Type	Description
pin	Required	String	ID of the pin.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
direction	Optional	String	Indicates the direction of the pin.

Example

Example scenario

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/getDirection '{"pin":"gpio4"}'

Response:

{
"returnValue": true,
"direction": "out"
}

gpio/setDirection

ACG: peripheralmanager.gpio.operation

Description

Sets the direction of the GPIO pin to input or output

Parameters

Name	Required	Type	Description
pin	Required	String	ID of the pin.
direction	Required	String	Direction of the pin. Possible values are: "in", "outLow", "outHigh"

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/setDirection ' {"pin":"gpio4", "direction":"outHigh"}'

Response:

{
"returnValue": true
}

gpio/getPollingFd

ACG: peripheralmanager.gpio.operation

Description

Returns the file descriptor for the GPIO pin specified in the input.

Parameters

Name	Required	Type	Description
id	Required	String	ID of the pin.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
fd	Optional	String	File descriptor of the interface.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/getPollingFd '{"id" : "gpio4"}'

Response:

{
"fd": 8,
"returnValue": true
}

gpio/getValue

ACG: peripheralmanager.gpio.operation

Description

Reads the value of the opened input pin

Parameters

Name

Required

Type

Description

Required

String

ID of the pin.

Optional

Boolean

Indicates if subscribed to get notified when there is a change in value. Possible values are:

true: Subscribed for notifications.
false: Not subscribed.

Default: false

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
subscribed	Optional	Boolean	Indicates if subscribed to get notifications. Possible values are: true: Subscribed for notifications. false: Not subscribed.
value	Optional	String	Indicates the value. Possible values are: "low" or "high".
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/getValue '{"pin":"gpio4"}'

Response:

{
"subscribed": false,
"returnValue": true,
"value": "low"
}

gpio/setValue

ACG: peripheralmanager.gpio.operation

Description

Sets the value of the opened output pin to "low" or "high"

Parameters

Name	Required	Type	Description
pin	Required	String	ID of the pin.
value	Required	String	Value of the output pin. Possible values are: "low" or "high".

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/setValue ' {"pin":"gpio4", "value":"low"}'

Response:

{
"returnValue": true
}

gpio/close

ACG: peripheralmanager.gpio.operation

Description

Closes the opened GPIO pin, so that the pin is available for other applications to use.

Parameters

Name	Required	Type	Description
pin	Required	String	ID of the pin.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/gpio/close '{"pin":"gpio4"}'

Response:

{
"returnValue": true
}

uart/list

ACG: peripheralmanager.query

Description

Provides the list of available UART interfaces in the target hardware.

Parameters

Name	Required	Type	Description
subscribe	Optional	Boolean	Indicates if subscribed to get notified when there is a change in available interfaces. Possible values are: true: Subscribed for notifications. false: Not subscribed. Default: false

Name

Required

Type

Description

Optional

Boolean

Indicates if subscribed to get notified when there is a change in available interfaces. Possible values are:

true: Subscribed for notifications.
false: Not subscribed.

Default: false

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
subscribed	Optional	String	Indicates if subscribed to get notifications. Possible values are: true: Subscribed for notifications. false: Not subscribed.
uartList	Optional	Object array: uartList	List of available UART interfaces.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example without Subscription

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/list '{}'

Response:

{
"subscribed":false,
"returnValue":true,
"uartList":[
{
"status":"used",
"interfaceId":"UART1"
}
]
}

uart/open

ACG: peripheralmanager.uart.operation

Description

Opens the UART interface, if not already opened by other applications.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Uart open

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/open '{"interfaceId":"UART1"}'

Response:

{
"returnValue": true
}

uart/getBaudrate

ACG: peripheralmanager.query

Description

Reads the baud rate of the opened UART device.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
baudrate	Optional	Number	Value of the baud rate.

Example

getBaudrate

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/getBaudrate '{"interfaceId":"UART1"}'

Response:

{
"returnValue": true,
"baudrate": 9600
}

uart/setBaudrate

ACG: peripheralmanager.uart.operation

Description

Sets the baud rate of the opened UART device to the required value.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.
baudrate	Required	Number	Value of the baud rate.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

String

The error code for the failed operation.

returnValue

Required

String

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setBaudrate

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/setBaudrate '{"interfaceId":"UART1", "baudrate":9600}'

Response:

{
"returnValue": true
}

uart/getPollingFd

ACG: peripheralmanager.uart.operation

Description

Returns the file descriptor for the UART interface specified in the input.

Parameters

Name	Required	Type	Description
id	Required	String	ID of the UART interface.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
fd	Optional	String	File descriptor of the interface.

Example

getPollingFd

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/getPollingFd '{"id" : "UART1"}'

Response:

{
"fd": 7,
"returnValue": true
}

uart/read

ACG: peripheralmanager.uart.operation

Description

Reads the data from the opened UART device.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.
size	Optional	Number	Size of the data to be read. If not specified, all available data is read.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
data	Optional	String	Value read from the opened UART interface.
dataType	Optional	String	Type of data in the data field.
bytes_read	Required	Number	Size of the read data.

Example

read

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/read '{"interfaceId":"UART1","size":9}'

Response:

{
"bytes_read":0,
"returnValue":true,
"data":[

],
"dataType":""
}

uart/write

ACG: peripheralmanager.uart.operation

Description

Writes the data to the opened UART device.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.
data	Required	String	Data to write into the UART device.
dataType	Required	String	Type of data in the data field.
size	Optional	String	Size of the data passed to be written.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
size	Optional	Number	Size of the data written to the device.

Example

write

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/write '{"interfaceId":"UART1", "data": ['1','2','3','4','5','6','7','8','9'], "dataType":"string" , "size":9}'

Response:

{
"returnValue": true,
"size": 0
}

uart/close

ACG: peripheralmanager.uart.operation

Description

Closes the opened UART device so that the interface is available for other apps to use.

Parameters

Name	Required	Type	Description
interfaceId	Required	String	ID of the UART interface.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example Code

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/uart/close '{"interfaceId":"UART1"}'

Response:

{
"returnValue": true
}

i2c/list

ACG: peripheralmanager.query

Description

Provides the list of available I2C buses.

Parameters

None

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
i2cList	Optional	String array	List of I2C buses.

Example

list

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/list '{}'

Response:

{
"returnValue": true,
"i2cBusList": [
"I2C1"
]
}

i2c/open

ACG: peripheralmanager.i2c.operation

Description

Opens the device connected to I2C bus.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device to be opened, which is connected to the I2C bus

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

open

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/open '{"name":"I2C1", "address":104}'

Response:

{
"returnValue": true
}

i2c/read

ACG: peripheralmanager.i2c.operation

Description

Reads data from the I2C device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C device.
address	Required	String	Address of the device that is being used.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
size	Optional	Number	Size of the data read.
data	Optional	Object array	Data read from the device.

Example

read

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/read '{"name":"I2C1", "address":104, "size":4}'

Response:

{
"data": [
4,
18,
1,
0
],
"returnValue": true,
"size": 4
}

i2c/readRegByte

ACG: peripheralmanager.i2c.operation

Description

Reads a byte from a given register of the I2C device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
data	Optional	Number	Read value from the register.

Example

readRegByte

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/readRegByte '{"name":"I2C1","address":104, "reg":0}'

Response:

{
"data": 22,
"returnValue": true
}

i2c/readRegWord

ACG: peripheralmanager.i2c.operation

Description

Reads a word from the register of the i2c device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
data	Optional	Number	Read value from the register.

Example

Example scenario

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/readRegWord '{"name":"I2C1","address":104, "reg":0}'

Response:

{
"data": 1111,
"returnValue": true
}

i2c/readRegBuffer

ACG: peripheralmanager.i2c.operation

Description

Reads a value from the register buffer.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
data	Optional	Object array	Data read.

Example

readRegBuffer

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/readRegBuffer '{"name":"I2C1", "address":104, "reg":0, "size":4}'

Response:

{
"data": [
1,
2,
3,
4
],
"returnValue": true,
"size": 4
}

i2c/write

ACG: peripheralmanager.i2c.operation

Description

Writes the data to the opened I2C device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
data	Required	Object array	Data to be written.
size	Optional	Number	Size of data to be written.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
size	Optional	Number	Bytes written.

Example

write

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/write '{"name":"I2C1", "address":104, "data":[1,2,3,4]}'

Response:

{
"returnValue": true,
"size": 4
}

i2c/writeRegByte

ACG: peripheralmanager.i2c.operation

Description

Writes a byte from a given register.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.
data	Required	Number	Data to write into register.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Number

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

writeRegByte

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/writeRegByte '{"name":"I2C1", "address":104, "reg":0, "data":22}'

Response:

{
"returnValue": true
}

i2c/writeRegWord

ACG: peripheralmanager.i2c.operation

Description

Writes a word to the register of the I2C device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.
data	Required	Number	Data to write into register.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

writeRegWord

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/writeRegWord '{"name":"I2C1","address":104, "reg":0, "data":1111}'

Response:

{
"returnValue": true
}

i2c/writeRegBuffer

ACG: peripheralmanager.i2c.operation

Description

Writes data to the register buffer of the connected I2C device.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device connected to the interface.
reg	Required	Number	Register address.
data	Required	Object array	Data that needs to be written.
size	Required	Number	Size of the data.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
size	Required	Number	Bytes to be written into register.

Example

writeRegBuffer

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/writeRegBuffer '{"name":"I2C1", "address":104, "reg":0, "data":[1,2,3,4]}'

Response:

{
"returnValue": true,
"size": 4
}

i2c/getPollingFd

ACG: None

Description

Returns the file descriptor for the I2c if specified in the input.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C pin.
address	Required	Number	Address of the I2C device connected to the interface.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	Indicates the status of operation.Possible values are: true - Indicates that the operation was successful. false - Indicates that the operation failed.
fd	Optional	String	File descriptor of the interface.

Example

/i2c/getPollingFd

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/getPollingFd '{"name" : "I2C1", "address" :104}'

Response:

{
"fd": 10,
"returnValue": true
}

i2c/close

ACG: peripheralmanager.i2c.operation

Description

Closes the opened I2C device connected to the bus.

Parameters

Name	Required	Type	Description
name	Required	String	Name of the I2C interface.
address	Required	Number	Address of the I2C device to be closed, which is connected to the I2C bus.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

Example scenario

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/i2c/close '{"name":"I2C1", "address":104}'

Response:

{
"returnValue": true
}

spi/list

ACG: peripheralmanager.query

Description

Provides the list of available SPI buses in the target hardware.

Parameters

None

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
list	Optional	String array	List of available SPI buses.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

list

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/list '{}'

Response:

{
"returnValue": true,
"list": [
"SPI00"
]
}

spi/open

ACG: peripheralmanager.spi.operation

Description

Opens the SPI bus, if not already opened by other applications.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI bus interface.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

open

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/open '{"name" :"SPI00"}'

Response:

{
"returnValue": true
}

spi/setMode

ACG: peripheralmanager.spi.operation

Description

Sets modes that correspond to the possible clocking configurations.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
mode	Required	Number	Mode to be set for the SPI device (possible values: 0 to 3).

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setMode

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/setMode '{"name":"SPI00", "mode":0}'

Response:

{
"returnValue": true
}

spi/writeByte

ACG: peripheralmanager.spi.operation

Description

Writes a byte of data to the SPI device connected to the bus.

Parameters

Name	Required	Type	Description
data	Required	Number	Data to be written.
name	Required	String	ID of the SPI interface.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

writeByte

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/writeByte '{"name":"SPI00", "data":10}'

Response:

{
"returnValue": true
}

spi/writeBuffer

ACG: peripheralmanager.spi.operation

Description

Writes a chunk of data to SPI device.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
data	Required	Object array	Data to be written to the SPI device.
size	Required	Number	Size of the data.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
size	Optional	Number	Size of the data written to the device.

Example

writeBuffer

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/writeBuffer '{"name":"SPI00", "data":[1,2,3,4]}'

Response:

{
"returnValue": true,
"size": 4
}

spi/transfer

ACG: peripheralmanager.spi.operation

Description

Opens a connection for receiving/transmitting data to/from a particular slave device.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
data	Optional	Object array	Data to be transferred to the SPI device.
size	Required	Number	Size of the data to be written/read, if data field is not present.

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	The status of the operation. Possible values are: true: Indicates that the operation was successful. false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.
tx_size	Optional	Number	Size of the data transferred to the SPI device.
rx_size	Optional	Number	Size of the data read from the SPI device.
rx_data	Optional	Object array	Receiving of the data from slave.

Example

transfer

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/transfer '{"name":"SPI00", "data":[1,2,3,4], "size":4}'

Response:

{
"returnValue": true,
"rx_size": 4,
"tx_size": 4,
"rx_data": [
1,
2,
3,
4
]
}

spi/setFrequency

ACG: peripheralmanager.spi.operation

Description

Sets the rate of data transfer (Hz)

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
frequency	Required	Number	Setting the frequency of the bus upto value that is allowed based on the bus max speed

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setFrequency

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/setFrequency '{"name":"SPI00", "frequency":9600}'

Response:

{
"returnValue": true
}

spi/setBitJustification

ACG: peripheralmanager.spi.operation

Description

Sets bit justification of the data transferred in the SPI bus i.e MSB-first or LSB-first

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
lsb_first	Required	Boolean	Bit Justification for the data transfer (true = LSB-first, false* = MSB-first)

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setBitJustification

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/setBitJustification '{"name":"SPI00", "lsb_first": false}'

Response:

{
"returnValue": true
}

spi/setBitsPerWord

ACG: peripheralmanager.spi.operation

Description

Configures the number of bits in each SPI transfer word.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
nbits	Required	Number	Setting up bit PerWord.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setBitsPerWord

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/setBitsPerWord '{"name":"SPI00", "nbits":8}'

Response:

{
"returnValue": true
}

spi/setDelay

ACG: peripheralmanager.spi.operation

Description

Sets the delay after a transfer before the chip select status is changed and the next transfer is triggered.

Parameters

Name	Required	Type	Description
name	Required	String	ID of the SPI interface.
delay_usecs	Required	Number	Delay time in micro seconds.

Call Returns

Name

Required

Type

Description

errorText

Optional

String

The reason for the failure of the operation. See the API Error Codes Reference section for details.

errorCode

Optional

Number

The error code for the failed operation.

returnValue

Required

Boolean

The status of the operation. Possible values are:

true: Indicates that the operation was successful.
false: Indicates that the operation failed. Check the "errorCode" and "errorText" fields for details.

Example

setDelay

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/setDelay '{"name":"SPI00", "delay_usecs":0}'

Response:

{
"returnValue": true
}

spi/close

ACG: peripheralmanager.spi.operation

Description

Closes the opened SPI bus, for other applications to use.

Parameters

None

Call Returns

Name	Required	Type	Description
errorText	Optional	String	The reason for the failure of the operation. See the API Error Codes Reference section for details.
errorCode	Optional	Number	The error code for the failed operation.
returnValue	Required	Boolean	Indicates the status of operation. Possible values are: true - Indicates that the operation was successful. false - Indicates that the operation failed.

Example

close

# luna-send -n 1 -f luna://com.webos.service.peripheralmanager/spi/close '{"name":"SPI00"}'

Response:

{
"returnValue": true
}

Objects

gpioList

Provides the list of available GPIO pins with the status.

Name	Required	Type	Description
pin	Required	String	ID of the pin as maintained by the service.
status	Required	String	Status of the pin as to whether "available" or "used" by other applications

uartList

Provide List of UART interfaces along with the status

Name

Required

Type

Description

status

Required

String

Status of the interface.

Possible values are:

used - The interface is currently being used.
available - The interface is available for the app to use

interfaceId

Required

String

Interface ID as maintained by the service.

API Error Codes Reference

Error Code	Error Text	Error Description
-994	kEREMOTEIO	Remote IO error.
-997	EBUSY	Pin is being accessed by other applications.
-995	kEPERM	Permission to access the pin is denied.
-996	ENODEV	File system was not mounted.
-993	kEINVAL	Invalid argument.