New product - USB-SPI Interface Adapter SPI-10
USB-IO Interface Adapter GPIO-24. Programmers Reference Manual.
| Byte 0 | Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
|---|---|---|---|---|---|---|---|
| GPIO _MAKE _PULSE (0x0A) | ECHO | GPIO | VAL | TL | TH | 0 | 0 |
The GPIO_MAKE_PULSE command instructs GPIO-24 adapter to make a single pulse on selected I/O pin. Pulse length has to be specified in bytes 4 and 5 and can vary from 1 ms to 65.535 seconds (65535 ms). After the pulse is finished the pin remains configured for output.
Command is an 8-byte array of the following format:
- Byte 0: GPIO_MAKE_PULSE (0x0A)
- This byte contains command identifier (command type). It should be set to 0x0A.
- Byte 1: ECHO
- This byte can be used to associate a response received from GPIO-24 adapter with 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.
- Byte 4: TL
- Least significant byte (low byte) of pulse length in ms.
- Byte 5: TH
- Most significant byte (high byte) of pulse length in ms.
- Byte 6..7: Reserved
- These bytes are reserved for future use and have to be set to 0.
For convenience GPIO_MAKE_PULSE_CMD structure is declared in reports.h file:
typedef struct _GPIO_MAKE_PULSE_CMD
{
unsigned char id; // = GPIO_MAKE_PULSE;
unsigned char echo;
unsigned char gpio;
unsigned char val;
unsigned short t;
unsigned char reserved[2]; // must be 0
} __PACKED_ATTR GPIO_MAKE_PULSE_CMD, *PGPIO_MAKE_PULSE_CMD;
GPIO-24 adapter sends GPIO_MAKE_PULSE response after command execution.
3.1.9. GPIO_GET_VAL
