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

This code example demonstrates USB Power Delivery (PD) Sink functionality and displays 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.

Provide feedback on this code example.

Requirements

ModusToolbox™ v3.3 or later (tested with v3.3)
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 v11.3.1 (GCC_ARM) - Default value of TOOLCHAIN
Arm® Compiler v6.22 (ARM)
IAR C/C++ Compiler v9.50.2 (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)
EZ-PD™ PMG1-S1 Evaluation Kit (EVAL_PMG1_S1_DRP)
EZ-PD™ PMG1-S3 Evaluation Kit (EVAL_PMG1_S3_DUALDRP)

Hardware setup

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

Table 1. 16x2 LCD pin connection for PMG1 kits

LCD 16x2 pins	PMG1-S0	PMG1-S1	PMG1-S2	PMG1-S3	EVAL_PMG1_S1_DRP	EVAL_PMG1_S3_DUALDRP
VSS	GND	GND	GND	GND	GND	GND
VCC	3V3	3V3	3V3	3V3	3V3	3V3
RS	J7.12	J7.16	J7.14	J6.12	J7.16	J7.20
RW	J7.11	J7.15	J7.13	J6.9	J7.15	J7.19
EN	J7.8	J7.13	J7.12	J6.10	J6.14	J7.7
D4	J7.6	J7.12	J7.11	J7.6	J6.10	J7.27
D5	J7.9	J7.11	J7.8	J7.19	J7.11	J13.8
D6	J6.9	J7.8	J7.5	J7.7	J7.8	J13.9
D7	J6.10	J6.15	J7.4	J6.17	J6.15	J13.10
A	J7.7	J6.16	J6.11	J6.11	J6.16	J7.9
K	GND	GND	GND	GND	GND	GND

Figure 1. Interface block diagram

This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.

Software setup

See the ModusToolbox™ tools package installation guide for information about installing and configuring the tools package.

This example requires no additional software or tools.

Using the code example

Create the project

The ModusToolbox™ tools package provides the Project Creator as both a GUI tool and a command line tool.

Use Project Creator GUI

Open the Project Creator GUI tool.

There are several ways to do this, including launching it from the dashboard or from inside the Eclipse IDE. For more details, see the Project Creator user guide (locally available at {ModusToolbox™ install directory}/tools_{version}/project-creator/docs/project-creator.pdf).
On the Choose Board Support Package (BSP) page, select a kit supported by this code example. See Supported kits.

Note: To use this code example 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.
On the Select Application page:

a. Select the Applications(s) Root Path and the Target IDE.

Note: Depending on how you open the Project Creator tool, these fields may be pre-selected for you.

b. Select this code example from the list by enabling its check box.

Note: You can narrow the list of displayed examples by typing in the filter box.

c. (Optional) Change the suggested New Application Name and New BSP Name.

d. Click Create to complete the application creation process.

Use Project Creator CLI

The 'project-creator-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™ 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™ installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ 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 following example clones the "USB PD Sink with 16x2 LCD" application with the desired name "UsbPdSink16x2LCD" 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 UsbPdSink16x2LCD --target-dir "C:/mtb_projects"

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

Argument	Description	Required/optional
`--board-id`	Defined in the field of the BSP manifest	Required
`--app-id`	Defined in the 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

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™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).

Open the project

After the project has been created, you can open it in your preferred development environment.

Eclipse IDE

If you opened the Project Creator tool from the included Eclipse IDE, the project will open in Eclipse automatically.

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

Visual Studio (VS) Code

Launch VS Code manually, and then open the generated {project-name}.code-workspace file located in the project directory.

For more details, see the Visual Studio Code for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_vscode_user_guide.pdf).

Keil µVision

Double-click the generated {project-name}.cprj file to launch the Keil µVision IDE.

For more details, see the Keil µVision for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_uvision_user_guide.pdf).

IAR Embedded Workbench

Open IAR Embedded Workbench manually, and create a new project. Then select the generated {project-name}.ipcf file located in the project directory.

For more details, see the IAR Embedded Workbench for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_iar_user_guide.pdf).

Command line

If you prefer to use the CLI, open the appropriate terminal, and navigate to the project directory. On Windows, use the command-line 'modus-shell' program; on Linux and macOS, you can use any terminal application. From there, you can run various make commands.

For more details, see the ModusToolbox™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).

Operation

Connect the board to your PC using the provided USB cable through the KitProg3 USB connector (J1).
Complete the steps listed in the Hardware setup section.
Ensure that the jumper shunt on power selection jumper (J5) is placed at position 2-3 (VIN) to enable programming mode.
Program the board using one of the following:
Using Eclipse IDE
1. Select the application project in the Project Explorer.
2. In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).
In other IDEs

Follow the instructions in your preferred IDE.
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
```
After programming the kit, change the position on power selection jumper (J5) to 1-2 (VBUS) 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.
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.
Observe that every 1 seconds, the LCD is updated with the connected PD source and contract data.
Measure the negotiated VBUS voltage using a multimeter across the DC_OUT terminal block (J9).

Figure 2. LCD output for PD power source

Note: For EVAL_PMG1_S3_DUALDRP Kit, LCD data display is applicable only for Port 0. In case of Port 1, LCD does not print any data.

Debugging

You can debug the example to step through the code.

In Eclipse IDE

Use the <Application Name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel. For details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ user guide.

Ensure that the board is connected to your PC using the USB cable through the KitProg3 USB connector and that the jumper shunt on the power selection jumper (J5) is placed at position 1-2. See the "Debug mode" section in the kit user guide.

For more details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ user guide.

In other IDEs

Follow the instructions in your preferred IDE.

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:

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)

TCPWM is used for controlling the Backlight of the LCD. To change the PWM Duty Cycle, see PWM LED Example.

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 SDCB1602-01 16x2 LCD module datasheet for more details.

USB PD Sink

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

Figure 4. Firmware flowchart

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

List of application files and their usage

Table 5. Application files and their usage

File	Purpose
config.h	Defines macros for the application configuration
main.c	Implements application main function
pmg1_version.h	Defines the application version details
lcd.c & .h	Defines function prototype for 16x2 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™ 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 documents
Middleware on GitHub	pdstack – PDStack middleware library and docs pdutils – PDUtils middleware library and docs pmg-app-common – PMG Application Common middleware library and documents
Tools	ModusToolbox™ – ModusToolbox™ software is a collection of easy-to-use libraries and tools enabling rapid development with Infineon MCUs for applications ranging from wireless and cloud-connected systems, edge AI/ML, embedded sense and control, to wired USB connectivity using PSOC™ Industrial/IoT MCUs, AIROC™ Wi-Fi and Bluetooth® connectivity devices, XMC™ Industrial MCUs, and EZ-USB™/EZ-PD™ wired connectivity controllers. ModusToolbox™ incorporates a comprehensive set of BSPs, HAL, libraries, configuration tools, and provides support for industry-standard IDEs to fast-track your embedded application development.

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
2.0.0	Updated to use the PmgAppCommon middleware

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