USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
5.2. GPIO_GET_OUT_VAL (0x04)
Table of Contents
- 6.1. Digital Input Event
- 6.2. Phase of Event Generation for Digital Input Pins
- 6.2.1. GPIO_IN_EV_NONE (0x00) – No events are sent
- 6.2.2. GPIO_IN_EV_LEV_0 (0x01) – Sending events when pin has logical "0" on its input
- 6.2.3. GPIO_IN_EV_LEV_1 (0x01) – Sending events when pin has logical "1" on its input
- 6.2.4. GPIO_IN_EV_RISING (0x03) – Sending events when input value changes from logical "0" to "1"
- 6.2.5. GPIO_IN_EV_FALLING (0x04) – Sending events when input value changes from logical "1" to "0"
- 6.2.6. GPIO_IN_EV_CHANGE (0x05) – Sending events when input value of the pin changes
- 6.3. Electrical Characteristics of Digital Inputs
- 6.4. GPIO_SET_IN_CFG (0x05)
- 6.5. GPIO_GET_IN_CFG (0x06)
- 6.6. GPIO_EV_IN (0x82)
Each of 24 USB-I/O adapter GPIO pins can be configured as a
digital input. The pins can be turned into the digital input mode with GPIO_SET_CFG command. Use GPIO_SET_IN_CFG command to configure input mode
settings for specified I/O pins.
The values for all 24 GPIO pins can be retrieved with GPIO_GET_VAL command. For digital input pins this command returns current input values.
You can configure digital input pins to send GPIO_EV_IN event to your application. The conditions of the event generation are defined with three bytes: Byte 4: PHASE, Byte 5: DEBOUNCE and Byte 6: REPEAT of GPIO_SET_IN_CFG command. For more detailed information see Section 6.1, “Digital Input Event”.
