mikroe_captouch2_cap1166

CAP1166 - Cap Touch 2 Click (Mikroe)

Summary

This project shows the driver implementation of an SPI capacitive touch sensor using the CAP1166 sensor with Silicon Labs Platform.

Cap Touch 2 click is a capacitive touch sensing Click board™ which features the CAP1166 chip, which is an advanced touch/proximity sensor IC. It packs a range of different touch/proximity functionalities allowing the development of robust and aesthetically pleasing touch interfaces. It can be used for desktop computer or notebook control, LCD/TFT monitors, various types of consumer electronics, home appliances, and other applications that can benefit of having a reliable and feature-rich touch activated user interface.

Table Of Contents

• Required Hardware
• Hardware Connection
• Setup
  • Create a project based on an example project
  • Start with an empty example project
• How It Works
• Report Bugs & Get Support

Required Hardware

• 1x Silicon Labs BLE Explorer Kit based on the EFR32 SoC, such as:

  • BGM220-EK4314A
  • BG22-EK4108A
  • xG24-EK2703A
  • xG22-EK2710A

  or

  1x Silicon Labs Wi-Fi Development Kit based on SiWG917, such as:

  • SIWX917-DK2605A
  • SIWX917-RB4338A + Si-MB4002A
  • SiW917Y-EK2708A

• 1x Cap Touch 2 Click board based on CAP1166

Hardware Connection

The Silicon Labs Explorer Kit boards feature a mikroBUS™ socket, allowing the Cap Touch 2 Click board to connect easily via the mikroBUS header. Ensure that the 45-degree corner of the Cap Touch 2 Click board aligns with the 45-degree white line on the Explorer Kit. The hardware connection is illustrated in the image below.

For the Silicon Labs boards that do not have a mikroBUS™ socket, consider using the Wire Jumpers.

The tables below provide an overview of the pin connections.

Silicon Labs BLE Explorer Kit:

Description	BRD4314A	BRD4108A	BRD2703A	BRD2710A	↔	Cap Touch 2 Click
SPI CS PIN	PC3	PC3	PC0	PC3	↔	CS
SPI CLK PIN	PC2	PC2	PC1	PC2	↔	SCK
SPI RX PIN	PC1	PC1	PC2	PC1	↔	SDO
SPI TX PIN	PC0	PC0	PC3	PC0	↔	SDI
Alert/Interrupt	PB3	PB3	PB1	PB3	↔	ALT
Reset	PC6	PC6	PC8	PC6	↔	RST

Silicon Labs Wi-Fi Development Kit:

Description	BRD4338A + BRD4002A	BRD2605A	BRD2708A	↔	Cap Touch 2 Click
RTE_GSPI_MASTER_CLK_PIN	GPIO_25 [P25]	GPIO_25 [P3]	GPIO_25	↔	SCK
RTE_GSPI_MASTER_MISO_PIN	GPIO_26 [P27]	GPIO_26 [P5]	GPIO_26	↔	SDO
RTE_GSPI_MASTER_MOSI_PIN	GPIO_27 [P29]	GPIO_27 [P7]	GPIO_27	↔	SDI
RTE_GSPI_MASTER_CS0_PIN	GPIO_28 [P31]	GPIO_28 [P9]	GPIO_28	↔	CS
Alert/Interrupt	GPIO_46 [P24]	GPIO_10 [P23]	UULP_VBAT_GPIO_2	↔	ALT
Reset	GPIO_47 [P26]	GPIO_11 [P22]	GPIO_30	↔	RST

Setup

You can either create a project based on an example project or start with an empty example project.

Important

• Make sure that the Third Party Hardware Drivers extension is installed as part of the SiSDK. If not, follow this documentation.
• Third Party Hardware Drivers extension must be enabled for the project to install the required components from this extension.

Tip

To show all components in the Third Party Hardware Drivers extension, the Evaluation quality must be enabled in the Software Component view.

Create a project based on an example project

1. From the Launcher Home, add your device to My Products, click on it, and click on the EXAMPLE PROJECTS & DEMOS tab. Find the example project filtering by cap1166.

2. Click Create button on the Third Party Hardware Drivers - CAP1166 - Cap Touch 2 Click (Mikroe) example. Example project creation dialog pops up -> click Create and Finish and Project should be generated.

   

3. Build and flash this example to the board.

Start with an empty example project

1. Create an "Empty C Project" for your board using Simplicity Studio v5. Use the default project settings.

2. Copy the file app/example/mikroe_captouch2_cap1166/app.c into the project root folder (overwriting existing file).

3. Open the .slcp file. Select the SOFTWARE COMPONENTS tab and install the following components:

   • If the BLE Explorer Kit is used:

     • [Services] → [Timers] → [Sleep Timer]
     • [Services] → [IO Stream] → [IO Stream: EUSART] → default instance name: vcom
     • [Application] → [Utility] → [Assert]
     • [Application] → [Utility] → [log]
     • [Platform] → [Driver] → [SPI] → [SPIDRV] → default instance name: mikroe
     • [Third Party Hardware Drivers] → [Human Machine Interface] → [CAP1166 - Capacitive Touch 2 Click (Mikroe)]

   • If the Wi-Fi Development Kit is used:

     • [Application] → [Utility] → [Assert]
     • [WiSeConnect 3 SDK] → [Device] → [Si91x] → [MCU] → [Service] → [Sleep Timer for Si91x]
     • [Third Party Hardware Drivers] → [Human Machine Interface] → [CAP1166 - Capacitive Touch 2 Click (Mikroe)]

4. Build and flash this example to the board.

How It Works

The example checks touch detection (is interrupt occured) and shows a message on the logging screen on which input touch is detected or on which input touch is released. Also turns on LED on which linked input interrupt occured.

You can launch Console that's integrated into Simplicity Studio or use a third-party terminal tool like Tera Term to receive the data from the USB. A screenshot of the console output is shown in the figure below.

Report Bugs & Get Support

To report bugs in the Application Examples projects, please create a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo. Please reference the board, project, and source files associated with the bug, and reference line numbers. If you are proposing a fix, also include information on the proposed fix. Since these examples are provided as-is, there is no guarantee that these examples will be updated to fix these issues.

Questions and comments related to these examples should be made by creating a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo.