USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.

Command is an 8-byte array of the following format:

Byte 0: GPIO_SUSPEND_PLS_CNT (0x2B)

This byte contains command ID (command type). It must be set to 0x2B.

Byte 1: ECHO

This byte can be used to associate a response received from GPIO-24 adapter with a specific command. Response will contain exactly the same value in its echo byte.

Byte 2: PLS_CNT_NUMBER

The ID number of the pulse counter:

• 0 – pulse counter on A.3 pin;

• 1 – pulse counter on A.4 pin.

Byte 3: RESET_TIMER

This byte resets time count:

• 1 – time count will be set to 0;

• 0 – time count is just suspended and will not be set to 0.

Byte 4: RESET_COUNTER

This byte resets pulse count:

• 1 – pulse count will be set to 0;

• 0 – pulse count is just suspended and will not be set to 0.

Bytes 5..7: Reserved

These bytes are reserved for future usage and must be set to 0.

Response is an 8-byte array of the following format:

Byte 0: GPIO_SUSPEND_PLS_CNT (0x2B)

Response ID (response type). This byte will contain 0x2B.

Byte 1: ECHO

Echo byte copied from the corresponding command. It can be used to associate the response with the specific command.

Byte 2: ST

Status of the command execution:

• GPIO_ST_SUCCESS (0x00) – Pulse counter has succesfully been suspended;

• GPIO_ST_INVALID_PLS_CNT_NUMBER (0x0A) – Invalid ID of the pulse counter has been specified (only 0 and 1 values are valid);

• GPIO_ST_INVALID_PARAMETER (0x0B) – Invalid reset timer parameter or reset counter parameter has been specified (only 0 and 1 values are valid).

Bytes 3..7: Reserved

These bytes are reserved for future usage.