usbapp - USB Functional operation#
Adaptation status unknown
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Tip
This library has its own demo,click this link to view demo examples of usbapp
Constant#
constant |
type |
explanation |
|---|---|---|
usbapp.NO_READY |
number |
NO_READY Event |
usbapp.READY |
number |
READY Event |
usbapp.SEND_OK |
number |
SEND_OK Event |
usbapp.NEW_DATA |
number |
NEW_DATA Event |
usbapp.set_id(id, vid, pid)#
USB Set the VID and PID
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
int |
vid Little Endian Format |
int |
pid Little Endian Format |
Return Value
None
Examples
usbapp.set_id(0, 0x1234, 0x5678)
usbapp.hid_mode(id, mode, buff_size)#
USB HID Device Mode
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
int |
mode，Currently 0 is keyboard, 1 is custom |
int |
buff_size，It can only be 8,16,32,64. If it is keyboard mode or other values are filled in, it will automatically be 8 |
Return Value
None
Examples
usbapp.hid_mode(0, 0) -- usb hid Keyboard mode
usbapp.hid_mode(0, 1) -- usb hid Custom mode for USB interaction
usbapp.start(id)#
Boot USB device
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
Return Value
return value type |
explanation |
|---|---|
bool |
Returns true on success, otherwise false |
Examples
-- Start USB
usbapp.start(0)
usbapp.stop(id)#
Turn off USB device
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
Return Value
return value type |
explanation |
|---|---|
bool |
Returns true on success, otherwise false |
Examples
-- Close USB
usbapp.stop(0)
usbapp.vhid_upload(id, data)#
USB HID Device upload data
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
string |
Data. Note that the available characters of HID are limited, basically only visible characters are supported, and unsupported characters will be replaced with spaces.. |
Return Value
return value type |
explanation |
|---|---|
bool |
Returns true on success, otherwise false |
Examples
-- HID Upload data
usbapp.vhid_upload(0, "1234") -- usb hid will simulate knocking out 1234
usbapp.hid_tx(id, data, start, len)#
USB HID Device uploads user-defined data
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
string |
or zbuff Note that it will be automatically filled when the amount of data is insufficient 0 |
int |
Optional. Data is valid only if it is zbuff. The starting position of the data to be sent is 0 |
int |
Optional. Data is valid only if it is zbuff. The length of the data to be sent is valid data in zbuff by default. The maximum value does not exceed the maximum space of zbuff. |
Return Value
return value type |
explanation |
|---|---|
bool |
Returns true on success, otherwise false |
Examples
-- HID Upload data
usbapp.hid_tx(0, "1234") -- usb hid Upload 0x 31 0x 32 0x 33 0x 34 N 0
usbapp.hid_rx(id, buff)#
buff Read the received data in the form, read all the data at one time and store it in buff. If there is not enough space in buff, it will automatically expand. Currently, only air105 supports this operation.
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
zbuff |
zbuff Object |
Return Value
return value type |
explanation |
|---|---|
int |
Returns the length of the read and moves the zbuff pointer backward |
Examples
usbapp.hid_rx(0, buff)
usbapp.vhid_cancel_upload(id)#
USB HID Device cancels uploading data
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
Return Value
return value type |
explanation |
|---|---|
nil |
No return value |
Examples
-- Cancel uploading data, usually not required
usbapp.vhid_cancel_upload(0)
usbapp.udisk_attach_sdhc(id)#
USB U Disk device mount SDHC,TF card
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
Return Value
return value type |
explanation |
|---|---|
nil |
No return value |
Examples
usbapp.udisk_attach_sdhc(0)
usbapp.udisk_detach_sdhc(id)#
USB U Disk device removal mount SDHC,TF card
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
the device id. the default value is 0 |
Return Value
return value type |
explanation |
|---|---|
nil |
No return value |
Examples
usbapp.udisk_detach_sdhc(0)