USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
9.7. GPIO_GET_HPWM_CFG (0x15)
The GPIO_SET_PULSE_CFG command allows to configure the pulse generation settings. For more detailed information see Section 9.3, “Single Pulses”.
GPIO_SET_PULSE_CFG Command
| Byte 0 | GPIO_SET_PULSE_CFG | Command ID (0x23). |
| Byte 1 | ECHO | Echo to associate command with the response. |
| Byte 2 | GPIO | GPIO pin number. |
| Byte 3 | VAL | Logical level of the pulse. |
| Byte 4 | TL | Pulse length (least significant byte). |
| Byte 5 | TH | Pulse length (most significant byte). |
| Byte 6..7 | Reserved | Reserved (must be 0). |
Command is an 8-byte array of the following format:
- Byte 0: GPIO_SET_PULSE_CFG (0x23)
This byte contains command ID (command type). It should be set to 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: 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 3: VAL
Logical level of the pulse:
0 – negative pulse.
1 – positive pulse.
- Bytes 4, 5: TL/TH
Byte 4: TL – least significant byte (low byte) of pulse length.
Byte 5: 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).
- Bytes 6..7: Reserved
These bytes are reserved for future usage and must be set to 0.
For convenience GPIO_SET_PULSE_CFG_CMD structure is declared in reports.h file.
GPIO-24 adapter sends GPIO_SET_PULSE_CFG response after command execution.
GPIO_SET_PULSE_CFG Response
| Byte 0 | GPIO_SET_PULSE_CFG | Response ID (0x23). |
| Byte 1 | ECHO | Echo to associate a command with the response. |
| Byte 2 | ST | Status of the command execution. |
| Byte 3..7 | Reserved | Reserved |
Response is an 8-byte array of the following format:
- Byte 0: GPIO_SET_PULSE_CFG (0x23)
Response ID (response type). This byte will contain 0x23.
- Byte 1: ECHO
Echo byte copied from the corresponding command. It is used to associate the response with the specific command.
- Byte 2: ST
Status of the command execution:
GPIO_ST_SUCCESS (0x00) – Command execution succeeded.
GPIO_ST_INVALID_GPIO(0x02)- Invalid
I/Opin number has been specified.
- Bytes 3..7: Reserved
These bytes are reserved for future usage.
For convenience GPIO_SET_PULSE_CFG_RSP structure is declared in reports.h file.
