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 _PWM _CFG (0x07) | ECHO |
|
MASK | T0L | T0H | T1L | T1H |
The GPIO_SET_PWM_CFG command configures pulse width modulation (PWM) settings for specified IO pins.
IO pins have to be switched to PWM mode using the GPIO_SET_CFG command. GPIO_SET_PWM_CFG command can be used prior to GPIO_SET_CFG. If IO pin is already in PWM mode, the settings are applied immediately.
PWM mode is configured specifying the high time (T1) and low time (T0) in ms. These values can vary from 1 ms to 65.535 seconds (65535 ms).
Command is an 8-byte array of the following format:
- Byte 0: GPIO_SET_PWM_CFG (0x07)
- This byte contains command identifier (command type). It should be set to 0x07.
- 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 IO 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: T0L
- Least significant byte (low byte) of low time in ms.
- Byte 5: T0H
- Most significant byte (high byte) of low time in ms.
- Byte 6: T1L
- Least significant byte (low byte) of high time in ms.
- Byte 7: T1H
- Most significant byte (high byte) of high time in ms.
For convenience GPIO_SET_PWM_CFG_CMD structure is declared in reports.h file:
typedef struct _GPIO_SET_PWM_CFG_CMD
{
unsigned char id; // = GPIO_SET_PWM_CFG;
unsigned char echo;
unsigned char on: 4;
unsigned char port: 4;
unsigned char mask;
unsigned short t0;
unsigned short t1;
} __PACKED_ATTR GPIO_SET_PWM_CFG_CMD, *PGPIO_SET_PWM_CFG_CMD;
GPIO-24 adapter sends GPIO_SET_PWM_CFG response after command execution.
3.1.6. GPIO_GET_IN_CFG
