EZ-PD™ PMG1 MCU: USB PD sink with 16x2 LCD

This code example demonstrates USB Power Delivery (PD) sink functionality and displays the PD contract information such as the type of PD source connected, negotiated voltage and current on LCD, and PWM to control the brightness of the LCD using EZ-PD™ PMG1 MCU devices.

View this README on GitHub.

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Requirements

• ModusToolbox™ software v3.0 or later (tested with v3.0)
• Board support package (BSP) minimum required version: 3.0.0
• Programming language: C
• Associated parts: All EZ-PD™ PMG1 MCU parts
• 16x2 LCD Module

Supported toolchains (make variable 'TOOLCHAIN')

• GNU Arm® Embedded Compiler v10.3.1 (GCC_ARM) - Default value of TOOLCHAIN
• Arm® Compiler v6.13 (ARM)
• IAR C/C++ Compiler v8.42.2 (IAR)

Supported kits (make variable 'TARGET')

• EZ-PD™ PMG1-S0 prototyping kit (PMG1-CY7110) - Default value of TARGET
• EZ-PD™ PMG1-S1 prototyping kit (PMG1-CY7111)
• EZ-PD™ PMG1-S2 prototyping kit (PMG1-CY7112)
• EZ-PD™ PMG1-S3 prototyping kit (PMG1-CY7113)

Hardware setup

1. Connect the board to your PC using the USB cable through the KitProg3 USB Type-C port (J1). This cable is used for programming the PMG1 device. It is also used during debugging.

2. Connect a USB PD source to the PMG1 USB PD port (J10) through a USB Type-C cable. This cable is used for powering the device

3. Connect the 16x2 LCD pins to the PMG1 kits per Table 1:

Table 1. 16x2 LCD pin connection for PMG1 kits

LCD 16x2 pins	PMG1-S0	PMG1-S1	PMG1-S2	PMG1-S3
VSS	GND	GND	GND	GND
VDD	3V3	3V3	3V3	3V3
RS	J7.12	J7.16	J7.14	J7.9
RW	J7.11	J7.15	J7.13	J7.8
E	J7.8	J7.13	J7.12	J7.7
D4	J7.6	J7.12	J7.11	J7.6
D5	J7.9	J7.11	J7.8	J7.5
D6	J6.9	J7.8	J7.5	J7.4
D7	J6.10	J6.15	J7.4	J6.19
A	J7.7	J6.16	J6.11	J7.11
K	GND	GND	GND	GND

Figure 1. Interface block diagram

See the kit user guide for more details on configuring the board.

Software setup

This example requires no additional software or tools.

Using the code example

Create the project and open it using one of the following:

In Eclipse IDE for ModusToolbox™ software

1. Click the New Application link in the Quick Panel (or, use File > New > ModusToolbox™ Application). This launches the Project Creator tool.

2. Pick a kit supported by the code example from the list shown in the Project Creator - Choose Board Support Package (BSP) dialog.

   When you select a supported kit, the example is reconfigured automatically to work with the kit. To work with a different supported kit later, use the Library Manager to choose the BSP for the supported kit. You can use the Library Manager to select or update the BSP and firmware libraries used in this application. To access the Library Manager, click the link from the Quick Panel.

   You can also just start the application creation process again and select a different kit.

   If you want to use the application for a kit not listed here, you may need to update the source files. If the kit does not have the required resources, the application may not work.

3. In the Project Creator - Select Application dialog, choose the example by enabling the checkbox.

4. (Optional) Change the suggested New Application Name.

5. The Application(s) Root Path defaults to the Eclipse workspace which is usually the desired location for the application. If you want to store the application in a different location, you can change the Application(s) Root Path value. Applications that share libraries should be in the same root path.

6. Click Create to complete the application creation process.

For more details, see the Eclipse IDE for ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mt_ide_user_guide.pdf).

In command-line interface (CLI)

ModusToolbox™ software provides the Project Creator as both a GUI tool and the command line tool, "project-creator-cli". The CLI tool can be used to create applications from a CLI terminal or from within batch files or shell scripts. This tool is available in the {ModusToolbox™ software install directory}/tools_{version}/project-creator/ directory.

Use a CLI terminal to invoke the "project-creator-cli" tool. On Windows, use the command line "modus-shell" program provided in the ModusToolbox™ software installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ software tools. You can access it by typing modus-shell in the search box in the Windows menu. In Linux and macOS, you can use any terminal application.

The "project-creator-cli" tool has the following arguments:

Argument	Description	Required/optional
--board-id	Defined in the <id> field of the BSP manifest	Required
--app-id	Defined in the <id> field of the CE manifest	Required
--target-dir	Specify the directory in which the application is to be created if you prefer not to use the default current working directory	Optional
--user-app-name	Specify the name of the application if you prefer to have a name other than the example's default name	Optional

The following example clones the "USB PD sink with 16x2 LCD" application with the desired name "MyUsbPdSinkLcdDisplay" configured for the PMG1-CY7110 BSP into the specified working directory, C:/mtb_projects:

project-creator-cli --board-id PMG1-CY7110 --app-id mtb-example-pmg1-usbpd-sink-lcd-display --user-app-name MyUsbPdSinkLcdDisplay --target-dir "C:/mtb_projects"

Note: The project-creator-cli tool uses the git clone and make getlibs commands to fetch the repository and import the required libraries. For details, see the "Project creator tools" section of the ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).

To work with a different supported kit later, use the Library Manager to choose the BSP for the supported kit. You can invoke the Library Manager GUI tool from the terminal using make library-manager command or use the Library Manager CLI tool "library-manager-cli" to change the BSP.

The "library-manager-cli" tool has the following arguments:

Argument	Description	Required/optional
--add-bsp-name	Name of the BSP that should be added to the application	Required
--set-active-bsp	Name of the BSP that should be as active BSP for the application	Required
--add-bsp-version	Specify the version of the BSP that should be added to the application if you do not wish to use the latest from manifest	Optional
--add-bsp-location	Specify the location of the BSP (local/shared) if you prefer to add the BSP in a shared path	Optional

The following example adds the PMG1-CY7110 BSP to the already created application and makes it the active BSP for the app:

~/ModusToolbox/tools_3.0/library-manager/library-manager-cli --project "C:/mtb_projects/MyUsbPdSinkLcdDisplay" --add-bsp-name PMG1-CY7110--add-bsp-version "latest-v3.X" --add-bsp-location "local"

~/ModusToolbox/tools_3.0/library-manager/library-manager-cli --project "C:/mtb_projects/MyUsbPdSinkLcdDisplay" --set-active-bsp APP_PMG1-CY7110

In third-party IDEs

Use one of the following options:

• Use the standalone Project Creator tool:

  1. Launch Project Creator from the Windows Start menu or from {ModusToolbox™ software install directory}/tools_{version}/project-creator/project-creator.exe.

  2. In the initial Choose Board Support Package screen, select the BSP, and click Next.

  3. In the Select Application screen, select the appropriate IDE from the Target IDE drop-down menu.

  4. Click Create and follow the instructions printed in the bottom pane to import or open the exported project in the respective IDE.

• Use command-line interface (CLI):

  1. Follow the instructions from the In command-line interface (CLI) section to create the application.

  2. Export the application to a supported IDE using the make <ide> command.

  3. Follow the instructions displayed in the terminal to create or import the application as an IDE project.

For a list of supported IDEs and more details, see the "Exporting to IDEs" section of the ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).

Operation

1. Ensure that the steps listed in the Hardware setup section are completed.

2. Ensure that the jumper shunt on power selection jumper (J5) is placed at position 2-3 to enable programming mode.

3. Connect the board to your PC using the USB cable through the KitProg3 USB connector (J1). This cable is used for programming the PMG1 device.

4. Program the board using one of the following:

   Using Eclipse IDE for ModusToolbox™ software

   1. Select the application project in the Project Explorer.

   2. In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).

   Using CLI

   From the terminal, execute the make program command to build and program the application using the default toolchain to the default target. The default toolchain is specified in the application's Makefile but you can override this value manually:

   make program TOOLCHAIN=<toolchain>
   

   Example:

   make program TOOLCHAIN=GCC_ARM
   

5. After programming the kit, change the position on power selection jumper (J5) to 1-2 to power the kit through the USB PD port (J10). Do not change the jumper (J5) position while the cables are connected to power source.

6. Observe that the user LED (LED3) on the board blinks at different rates depending on the type of power adapter connected:

   • If a power adapter supporting USB Power Delivery is connected, the LED blinks at approximately 5 Hz (toggles every 100 ms); the LCD displays PD Power Source in the first row and PDO details (voltage and current) in the second row.

   • If a USB Type-C power adapter or a standard downstream port (SDP) is connected, the LED blinks at approximately 1 Hz (toggles every 500 ms); the LCD displays SDP source in the first row.

   • If a dedicated charging port (DCP) is connected, the LED blinks at approximately 0.17 Hz (toggles every 3 seconds); the LCD displays DCP source in the first row.

   • If a charging downstream port (CDP) is connected, the LED blinks at approximately 0.05 Hz (toggles every 10 seconds); the LCD displays CDP source in the first row.

7. Control the brightness of the LCD via the PWM_DUTY_CYCLE macro defined in the src/lcd/lcd.h header file.

   • PWM_DUTY_CYCLE set to 0U: Brightness of the LCD module is 0%
   • PWM_DUTY_CYCLE set to 100U: Brightness of the LCD module is 100%

8. Observe that every 3 seconds, the LCD is updated with the connected PD source and contract data.

9. Measure the negotiated VBUS voltage using a multimeter across the DC_OUT terminal block (J9).

Figure 2. LCD output for PD power source

Debugging

You can debug the example to step through the code. In the IDE, use the <Application name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel.

Ensure that the board is connected to your PC using the USB cables through both the KitProg3 USB connector as well as the USB PD port, with the jumper shunt on power selection jumper (J5) placed at position 1-2.

See the "Debug mode" section in the kit user guide for debugging the application on the CY7110 prototyping kit. For more details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ software user guide.

Design and implementation

Interfacing the LCD

This code example uses a SDCB1602-01 16x2 LCD module, which has 16 columns and 2 rows to display data, and uses a parallel interface to communicate with the MCU. The LCD has 8-bit and 4-bit interface modes. This code example uses the 4-bit interface mode.

The LCD has two registers (command and data registers); the command register stores various commands given to the display. The data register stores data to be displayed.

Figure 3. LCD 16x2 pinout

Table 2. LCD pinout

Pin number	Pin name	Function description
1	VSS	Ground (GND)
2	VCC	3.3 V
3	VO	Adjust the contrast of the LCD
4	RS (Register Select)	Toggle between command and data register. For command, RS = 0; for data, RS = 1
5	RW (Read Write)	Used for read/write operation. For write, RW = 0; for read, RW = 1
6	EN (Enable)	Toggled for read/write operations
7 - 14	D0–D7 (Data pins)	Used to send data/command
15	A (Anode)	Used for backlight (positive terminal)
16	K (Cathode)	Used for backlight (negative terminal)

LCD modes

• 4-bit mode: Sends the data nibble by nibble, first the upper nibble and then the lower nibble, and uses data pins D4–D7
• 8-bit mode: Sends the data directly and uses data pins D0–D7

Table 3. 16x2 LCD general commands

Hex codes	Command to LCD display
0x01	Clear display
0x02	Return home
0x04	Decrement cursor (shift cursor left)
0x06	Increment cursor (shift cursor right)
0x05	Shift display right
0x07	Shift display left
0x0A	Cursor ON, display OFF
0x0C	Cursor OFF, display ON
0x0F	Display ON, blinks the cursor
0x10	Shift cursor position left
0x14	Shift cursor position right
0x18	Shift the entire display left
0x1C	Shift the entire display right
0x80	Move cursor to the beginning of the first line
0xC0	Move cursor to the beginning of the second line
0x38	2 lines and 5x7 matrix

Note: See the datasheet of SDCB1602-01 16x2 LCD module for more details.

USB PD sink

See EZ-PD™ PMG1 MCU: USBPD sink to learn about the PD sink functionality.

Figure 4. Firmware flowchart

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Resources and settings

Table 4. Application resources

Resource	Alias/object	Purpose
USBPD	PD_PORT0	USBPD block used for PD communication
LED (BSP)	CYBSP_USER_LED	User LED to indicate PD connection state
TCPWM (PWM)	CYBSP_PWM	To control the backlighting brightness of the LCD

Related resources

Resources	Links
Application notes	AN232553 – Getting started with EZ-PD™ PMG1 MCU on ModusToolbox™ software AN232565 – EZ-PD™ PMG1 hardware design guidelines and checklist
Code examples	Using ModusToolbox™ software on GitHub
Device documentation	EZ-PD™ PMG1 MCU datasheets
Development kits	Select your kits from the Evaluation Board Finder page.
Libraries on GitHub	mtb-pdl-cat2 – Peripheral driver library (PDL) and docs
Tools	Eclipse IDE for ModusToolbox™ software ModusToolbox™ software is a collection of easy-to-use software and tools enabling rapid development with Infineon MCUs, covering applications from embedded sense and control to wireless and cloud-connected systems using AIROC™ Wi-Fi & Bluetooth® combo devices.

Other resources

Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.

Document history

Document title: CE236822 – EZ-PD™ PMG1 MCU: USB PD sink with 16x2 LCD

Version	Description of change
1.0.0	New code example

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