XMOS VocalFusion XVF3510, Руководство пользователя

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XM-014232-PC 37
COMMAND TYPE DIR ARGS DESCRIPTION
GET_GPI_INT_PENDING_PORT uint32 READ 1
Read whether interrupt was triggered for all pins on selected
port. The interrupt pending register for the whole port is
cleared by this command.
SET_GPI_PIN_ACTIVE_LEVEL uint8 WRITE 3
Set the active level for a specific GPI pin. Arguments are <Port
Index> <Pin Index> <0: active low, 1: active high>. By default,
all GPI pins are set to active high.
SET_GPI_INT_CONFIG uint8 WRITE 3
Sets the interrupt config
for a specific pin. Arguments are <Port Index> <Pin Index>
<Interrupt
type 0=None, 1=Falling,
2=Rising, 3=Both>.
SET_GPI_READ_HEADER uint8 WRITE 2
Sets the selected port and pin for the next GPIO read.
Arguments are <Port Index> <Pin Index>.
GET_GPI_READ_HEADER uint8 READ 2
Gets the currently selected port and pin set by a previous
SET_GPI_READ_HEADER command.
SET_KWD_INTERRUPT_PIN uint8 WRITE 1 Set gpi pin index to receive kwd interrupt on
GET_KWD_INTERRUPT_PIN uint8 READ 1 Read gpi pin index to receive kwd interrupt on
For example, a read operation on XVF3510-UA is illustrated below. To read the level of pin 2 of the
input port first set the port index (always 0 for XVF3510) and the pin index (2 in this case):
vfctrl_usb SET_GPI_READ_HEADER 0 2
Next perform the read:
vfctrl_usb GET_GPI
GET_GPI: 13
The returned value, 13 (b‘1101), means pin index 1 (IP_1) is logic low and the other pins 0, 2 and 3
logic high.
EXAMPLE: CONFIGURING AND CAPTURING A FALLING AND RISING EDGE INTERRUPT
An example of configuration of a GPIs to capture edge events is discussed below (XVF3510-INT used
for the example). First, configure IP_1 to trigger a falling edge interrupt and IP_2 to trigger a rising
edge interrupt as shown:
vfctrl_i2C SET_GPI_INT_CONFIG 0 1 1
vfctrl_i2C SET_GPI_INT_CONFIG 0 2 2
For the example, IP_1 & IP_2 are connected to the same source, which is driving low. To check the
ports for interrupts use the following commands:
vfctrl_i2C SET_GPI_READ_HEADER 0 0
vfctrl_i2C GET_GPI_INT_PENDING_PORT
> GET_GPI_INT_PENDING_PORT: 0
NOTE: The pin index specified in SET_GPI_READ_HEADER is ignored by
GET_GPI_INT_PENDING_PORT
The result returned by the
GET_GPI_INT_PENDING_PORT
indicates that no transitions have occurred.