How to connect winner A13 to a capacitive touch screen

Winner A13 is a system on chip (SoC) widely used in low-cost tablets and embedded devices. One of its key features is support for capacitive touch screens, which are widely used in modern touch screen devices. This article will provide a detailed introduction on how to connect Winner A13 to a capacitive touch screen, covering the steps of hardware connection and software configuration.

1. Firstly, we need to understand the components of winner A13

1. winner A13 SoC

The Quanzhi A13 is a low-power processor designed specifically for tablets and other portable devices. It supports various peripherals including capacitive touch screens.

2. Capacitive touch screen

Capacitive touch screens detect touch inputs through changes in electric fields. It is typically used for smartphones, tablets, and other touch enabled devices.

3. Interface requirements

The Quanzhi A13 typically communicates with capacitive touch screens using I2C or SPI interfaces. This requires ensuring that your touch screen supports one of the interfaces.

After understanding the components, the next step is the step-by-step connection guide. Follow the guide and you will know how to connect the winner A13 to the capacitive touch screen.

2. Hardware connection

(1). Identify pins

Refer to the data manual for Quanzhi A13 and capacitive touch screens to identify the required pins (e.g. VCC for I2C GND、SDA、SCL）。

(2). Connect the power supply and ground wire

Connect the VCC and GND pins of the touch screen to the corresponding power and ground pins on the Quanzhi A13.

(3). Connect the data cable

For I2C: Connect the SDA (data) and SCL (clock) pins of the touch screen to the corresponding pins on the All Star A13.

For SPI: Connect MOSI, MISO, SCK, and CS pins according to the data manual.

(4). Add pull-up resistor (if necessary)

I2C circuits typically require a pull-up resistor (usually 4.7k Ω) to ensure proper communication.

3. Software configuration

(1). Kernel configuration

Ensure that the A13 kernel of Quanzhi supports touch screen drivers. You may need to enable appropriate drivers (such as I2C or SPI touch screen drivers) in the kernel configuration.

(2). Device tree configuration

Modify the Device Tree Source (DTS) file to include detailed information about the touch screen, such as its I2C address or SPI configuration.

(3). driver installation

If the touch screen requires a specific driver, please compile and install it on the Quanzhi A13 system.

4. Test connection

1. Start the device

Open the winner A13 device and check if the capacitive touch screen is detected.

2. Check the kernel logs

Use the 'dmesg' command to check for touch screen related errors or messages in the kernel log.

3. Test the touch function

Use the touch input settings of the testing application or operating system to verify if the touch screen is working properly.

Connecting winner A13 to a capacitive touch screen involves hardware and software steps. By carefully following the pin connections, configuring the kernel and device tree, and testing the settings, you can successfully integrate the capacitive touch screen with the winner A13. This enables you to create touch enabled devices for various applications.