| .. _grove-lcd-sample: |
| |
| Grove LCD |
| ######### |
| |
| Overview |
| ******** |
| |
| This sample displays an incrementing counter through the Grove LCD, with |
| changing backlight. |
| |
| Requirements |
| ************ |
| |
| To use this sample, the following hardware is required: |
| |
| * Arduino 101 or Quark D2000 Devboard |
| * `Grove LCD module`_ |
| * `Grove Base Shield`_ [Optional] |
| |
| Wiring |
| ****** |
| |
| You will need to connect the Grove LCD via the Grove shield onto a board that |
| supports Arduino shields. |
| |
| On some boards you will need to use 2 pull-up resistors (10k Ohm) between the |
| SCL/SDA lines and 3.3V. |
| |
| .. note:: |
| |
| The I2C lines on Quark SE Sensor Subsystem does not have internal pull-up, so |
| external one is required. |
| |
| Take note that even though SDA and SCL are connected to a 3.3V power source, the |
| Grove LCD VDD line needs to be connected to the 5V power line, otherwise |
| characters will not be displayed on the LCD (3.3V is enough to power just the |
| backlight). |
| |
| |
| Building and Running |
| ******************** |
| |
| This sample should work on any board that has I2C enabled and has an Arduino |
| shield interface. For example, it can be run on the Quark D2000 DevBoard as |
| described below: |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/grove/lcd |
| :board: quark_d2000_crb |
| :goals: flash |
| :compact: |
| |
| .. _Grove Base Shield: http://wiki.seeedstudio.com/wiki/Grove_-_Base_Shield |
| .. _Grove LCD module: http://wiki.seeed.cc/Grove-LCD_RGB_Backlight/ |
