DLN_GPIO_PIN_GET_OUT_VAL Command and Response

The DLN_GPIO_PIN_GET_OUT_VAL command retrieves the pin output value, set using the DLN_GPIO_PIN_SET_OUT_VAL command and stored in the internal latch. If the pin is not an output, the value is taken from the latch.

DLN_GPIO_PIN_GET_OUT_VAL Command

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 typedef struct
 {
    DLN_MSG_HEADER header;
    uint8_t pin;
 } __PACKED_ATTR DLN_GPIO_PIN_GET_OUT_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_PIN_GET_OUT_VAL_CMD structure.
msgId	Identifies the message. For the DLN_GPIO_PIN_GET_OUT_VAL command it must be set to 0x010D. You can use the DLN_MSG_ID_GPIO_PIN_GET_OUT_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.

pin

A pin to get the output value from.

DLN_GPIO_PIN_GET_OUT_VAL Response

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The adapter sends the DLN_GPIO_PIN_GET_OUT_VAL response after the DLN_GPIO_PIN_GET_OUT_VAL command execution. The response contains the output value on the specified pin.

 typedef struct
 {
    DLN_MSG_HEADER header;
    DLN_RESULT result;
    uint8_t pin;
    uint8_t value;
 } __PACKED_ATTR DLN_GPIO_PIN_GET_OUT_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_PIN_GET_OUT_VAL_RSP structure.
msgId	Contains the message id. For the DLN_GPIO_PIN_GET_OUT_VAL response it is set to 0x010D. The DLN_MSG_ID_GPIO_PIN_GET_OUT_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_PIN_GET_OUT_VAL command DLN-series adapter can return the following result values:

Return Code	Description
DLN_RES_SUCCESS	Pin output value has been successfully retrieved.
DLN_RES_INVALID_PIN_NUMBER	Invalid pin number was specified.

pin

A pin to get the output value from.

value

The output value on the specified pin.

DLN_GPIO_PIN_GET_OUT_VAL Command and Response