USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
7.12. GPIO_GET_ADC_CFG (0x13)
GPIO-24 adapter can send GPIO_EV_ADC event to your application.
You can configure event generation conditions with GPIO_SET_ADC_CHANNEL_CFG command. For more detailed information see Section 7.4, “ADC Event”.
| Byte 0 | GPIO_EV_ADC | Event ID (0x83). |
| Byte 1 | CNT | Event counter |
| Byte 2 | CHANNEL | ID number of the ADC channel which has generated the event |
| Byte 3 | ADC_VAL_LSB | Current voltage (least significant byte) |
| Byte 4 | ADC_VAL_MSB | Current voltage (most significant byte) |
| Byte 5 | EVENT_CONDITION | Condition of the event sending |
| Bytes 6..7 | Reserved | Reserved |
Event is an 8-byte array of the following format:
- Byte 0: GPIO_EV_ADC (0x83)
Event ID (event type). This byte will contain 0x83.
- Byte 1: CNT
CNT byte value is incremented each time when any event arises.
- Byte 2: CHANNEL
The number of the ADC channel which has generated the event:
0 – C.1 pin;
1 – C.2 pin;
2 – C.5 pin;
3 – C.6 pin;
4 – B.3 pin.
- Byte 3..4: ADC_VAL_LSB/ADC_VAL_MSB
Current voltage.
Byte 3: ADC_VAL_LSB – least significant byte of the voltage.
Byte 4: ADC_VAL_MSB – most significant byte of the voltage.
- Byte 5: EVENT_CONDITION
The condition of the event generation:
For more detailed information about the event generation see Section 7.4, “ADC Event”.GPIO_ADC_EV_BELOW (0x1) – the input voltage descends below the low threshold value.
GPIO_ADC_EV_ABOVE (0x2) – the input voltage rises above high threshold value.
GPIO_ADC_EV_OUTSIDE (0x3) – the input voltage exceeds the limits specified by low and high threshold values.
GPIO_ADC_EV_INSIDE (0x4) – the input voltage is within the limits specified by low and high threshold values.
GPIO_ACD_EV_ALWAYS (0x5) – the events are sent periodically with predefined interval.
- Bytes 6..7: Reserved
These bytes are reserved for future usage.
For convenience GPIO_EV_ADC structure is declared in reports.h file.
