USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
9.8. GPIO_SET_PULSE_CFG (0x23)
The GPIO_GET_PULSE_CFG command allows to retrieve the pulse generation settings.
GPIO_GET_PULSE_CFG Command
| Byte 0 | GPIO_GET_PULSE_CFG | Command ID (0x24). |
| Byte 1 | ECHO | Echo to associate a command with the response. |
| Byte 2 | GPIO | GPIO pin number. |
| Byte 3..7 | Reserved | Reserved (must be 0). |
Command is an 8-byte array of the following format:
- Byte 0: GPIO_GET_PULSE_CFG (0x24)
Command ID (command type). It should be set to 0x24.
- Byte 1: ECHO
Echo byte copied from the corresponding command. It is used to associate the response with the specific command.
- Byte 2: GPIO
GPIO pin number:
0..7 corresponds to GPIO PORT A pins 0..7;
8..15 corresponds to GPIO PORT B pins 0..7;
16..23 corresponds to GPIO PORT C pins 0..7.
- Bytes 3..7: Reserved
These bytes are reserved for future usage and must be set to 0.
For convenience GPIO_GET_PULSE_CFG_CMD structure is declared in reports.h file.
GPIO-24 adapter sends GPIO_GET_PULSE_CFG response after command execution. The response contains pulse configuration settings.
GPIO_GET_PULSE_CFG Response
| Byte 0 | GPIO_GET_PULSE_CFG | Response ID (0x24). |
| Byte 1 | ECHO | Echo to associate command with the response. |
| Byte 2 | ST | Status of the command execution. |
| Byte 3 | GPIO | GPIO pin number. |
| Byte 4 | STATE | State of pulse. |
| Byte 5 | VAL | Logical level of the pulse. |
| Byte 6 | TL | Pulse length (least significant byte). |
| Byte 7 | TH | Pulse length (most significant byte). |
Response is an 8-byte array of the following format:
- Byte 0: GPIO_GET_PULSE_CFG (0x23)
This byte contains response ID (response type). This byte will contain 0x23.
- Byte 1: ECHO
This byte is 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: ST
Status of the command execution:
GPIO_ST_SUCCESS (0x00) – Command execution succeeded.
- Byte 3: GPIO
GPIO pin number:
0..7 corresponds to GPIO PORT A pins 0..7;
8..15 corresponds to GPIO PORT B pins 0..7;
16..23 corresponds to GPIO PORT C pins 0..7.
- Byte 4: STATE
The state of pulse:
GPIO_CFG_PULSE_IDLE (0x01) – The pin is switched to pulse mode, but it is not sending a pulse at the moment.
GPIO_CFG_PULSE_ACTIVE (0x00) – The pin is sending a pulse at the moment.
- Byte 5: VAL
Logical level of the pulse:
0 – negative pulse;
1 – positive pulse.
- Bytes 6, 7: TL/TH
Byte 6: TL – least significant byte (low byte) of pulse length.
Byte 7: TH – most significant byte (high byte) of pulse length.
Pulse length is specified in ms in the range from 1 to 65535 ms (65.535 seconds).
For convenience GPIO_GET_PULSE_CFG_RSP structure is declared in reports.h file.
