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_ SET_OUT _VAL (0x03) | ECHO | PORT | MASK | VAL | 0 | 0 | 0 |
The GPIO_SET_OUT_VAL command sets output values for all pins of particular I/O port. Port number is specified in Byte 2. Only pins with corresponding mask bit set to 1 will be affected.
IO pins have to be switched to output mode using the GPIO_SET_CFG command. GPIO_SET_OUT_VAL command can be used prior to GPIO_SET_CFG to preset output values before switching the pin to output mode. If IO pin is already in output mode, the output value is applied immediately.
Command is an 8-byte array of the following format:
- Byte 0: GPIO_SET_OUT_VAL (0x03)
- This byte contains command identifier (command type). It should be set to 0x03.
- 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: PORT
-
GPIO PORT:
- 0 - GPIO PORT A
- 1 - GPIO PORT B
- 2 - GPIO PORT C
- Byte 3: MASK
- Data mask to use when modifying I/O pin output values. The mask value allows modification of the specific pins, leaving rest of the pins unchanged. Only the pins with mask bit set to 1 will be affected.
- Byte 4: VAL
- Bits of this byte are output values to be set on the corresponding pins.
- Byte 5..7: Reserved
- These bytes are reserved for future use and have to be set to 0.
For convenience GPIO_SET_OUT_VAL_CMD structure is declared in reports.h file:
typedef struct _GPIO_SET_OUT_VAL_CMD
{
unsigned char id; // = GPIO_SET_OUT_VAL_CMD;
unsigned char echo;
unsigned char port;
unsigned char mask;
unsigned char val;
unsigned char reserved[3]; // must be 0
} __PACKED_ATTR GPIO_SET_OUT_VAL_CMD, *PGPIO_SET_OUT_VAL_CMD;
GPIO-24 adapter sends GPIO_SET_OUT_VAL response after command execution.
3.1.2. GPIO_GET_CFG
