DLN_GPIO_PORT_GET_VAL Command and Response

The DLN_GPIO_PORT_GET_VAL command is used to retrieve current values on the GPIO pins.

DLN_GPIO_PORT_GET_VAL Command

Syntax

C/C++

 typedef struct
 {
    DLN_MSG_HEADER header;		
    uint8_t port;
 } __PACKED_ATTR DLN_GPIO_PORT_GET_VAL_CMD;

Parameters:

header

Defines the DLN message header DLN_MSG_HEADER. The header contains several predefined fields and is used to identify and route messages. You must fill the following fields before sending the command:

Field	Description
size	The size of the message. Must be equal to the size of the DLN_GPIO_PORT_GET_VAL_CMD structure.
msgId	Identifies the message. For the DLN_GPIO_PORT_GET_VAL command it must be set to 0x0106. You can use the DLN_MSG_ID_GPIO_PORT_GET_VAL constant.
echoCounter	Can be used to link a command to a response. The response will have the same echoCounter value. This field can be any numerical value from 0 to 0xFFFF (65536).
handle	A handle to the DLN-series adapter.

port

A port to get the pin values from.

DLN_GPIO_PORT_GET_VAL Response

Go to command

The adapter sends the DLN_GPIO_PORT_GET_VAL response after the DLN_GPIO_PORT_GET_VAL command execution. The response contains current values on the pins.

Syntax

C/C++

 typedef struct
 {
    DLN_MSG_HEADER header;		        	
    uint8_t result;					        
    uint8_t port;
    uint8_t values;			
 } __PACKED_ATTR DLN_GPIO_PORT_GET_VAL_RSP;

Parameters:

header

Defines the DLN message header DLN_MSG_HEADER. The response header contains the following fields:

Field	Description
size	The size of the message. It is equal to the size of the DLN_GPIO_PORT_GET_VAL_RSP structure.
msgId	Contains the message id. For the DLN_GPIO_PORT_GET_VAL response it is set to 0x0106. The DLN_MSG_ID_GPIO_PORT_GET_VAL constant can be used to check the message ID.
echoCounter	Links a command to a response. The echoCounter value is copied from the respective command header.
handle	A handle to the DLN-series adapter. You can use the handle field to determine the adapter that have sent the response.

result

Contains the result of the command execution. For DLN_GPIO_PORT_GET_VAL command DLN-series adapter can return the following result values:

Return Code	Description
DLN_RES_SUCCESS	Values were successfully retrieved.

port

A port to get the pin values from.

values

A bit field, which contains the current pin values for the port.

DLN_GPIO_PORT_GET_VAL Command and Response