wireless mouse using an Interlink micro joystick

[jive talkin]

Working on a wireless mouse project using an Interlink micro joystick (www.interlinkelectronics.com/MicroJoystickHDK.php) and nrf51822 ble module. Movement of the interlink micro joystick is encoded by a pic18f14k50t microcontroller. The 18F14K50T encodes joystick movements and outputs to usb cable for input to the computer. Looking for nrf51822 firmware that will eliminate the usb cable. Want to connect usb output from pic to input to nrf51822 for wireless mouse connection to a computer.

[Hung Bui]

@jive talkin: We have the example firmware to use nRF51 as a Bluetooth 4.0 mouse in the nRF51 SDK. You would need to implement your code to interface with the Pic18f14k.

[jive talkin]

i went to developer.nordicsemi.com/.../a00068.html. That example will not help me. The interlink joystick does not use switches. It uses a change in resistance. The pic takes the change in resistance and encodes for usb computer input. I want to get rid of the usb cable.The goal is for the 51822 to handle the usb output from the pic and pass the microjoystick movement to the computer via bluetooth. I need firmware that will eliminate the usb cable.

[Hung Bui]

@jive: I afraid we don't have a solution for you to emulate the USB interface to get the data from the PIC micro controller. You would need to either remove the PIC MCU and use the nRF51 to read the change of the resistance on joystick movement or modify the source code of the PIC MCU to interface with the nRF51 via UART or I2C or SPI or parallel.

[jive talkin]

Can you suggest another nordic chip to get the data from the pic to the computer via ble 4.0?

[Hung Bui]

For your application, you would need a USB host chip that can act as a host. We don't have any chip that offering this. I think the less coding solution you can do is to use a Raspberry PI to act as USB host and receive the data from the PIC and can forward it to BLE. But it will add up the cost and make your set-up complicated.