AT89STK-05 Atmel, AT89STK-05 Datasheet - Page 8

• Manufacturer Part Number: AT89STK-05
• Description: KIT STARTER FOR AT89C5131
• Manufacturer: Atmel

Specifications of AT89STK-05

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: AT89C5131
• Primary Attributes: *
• Secondary Attributes: *
• Processor To Be Evaluated: AT89C5131A
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Receiver Part
8
USB RF Mouse
Figure 7. Description of Mouse Switch Connection
A message is sent if an event appears on the mouse (press or release).
When a switch is pressed, a message is sent to the receiver part.
When a switch is released, a message is sent to the receiver part.
The result of pressing a button is only two messages, whatever the duration of the press.
The receiver part controls the USB link (HID mouse enumeration), the reception of RF data and
the decoding of data protocol.
The software manages all the mouse movements even diagonals.
In the config.h file, the flag “nRF24L01_RECEIVER” must be defined.
Each polling period, the embedded USB task sends a message to PC with the mouse status.
This message contains 4 data bytes:
•
•
•
•
Figure 8. usb_mouse_report
usb_mouse_report[0]
usb_mouse_report[1]
usb_mouse_report[2]
usb_mouse_report[3]
Open if switch is pressed (IO port = 1)
Closed if switch is released (IO port = 0)
Byte 3
Wheel
Byte 2
Mouse pointer position
Y
Byte 1
VSS
X
µController IO port (internal pull up)
Byte 0
2 1 0
Button 1
Button 2
Button 3
7650A–USB–05/06