STMicroelectronics STM32G071B-DISCO User Manual

UM2546

User manual

STM32G071B-DISCO USB-C Discovery kit

Introduction

The STM32G071B-DISCO USB-C Discovery kit comes on top of the STM32Cube as a firmware package that offers a full set of software components based on a modular architecture allowing each module to be used separately in standalone sink applications.

The STM32G071B-DISCO USB-C Discovery kit may be executed in two different modes depending on the position of the switch: standalone sink mode, or spy mode. The spy mode does not use the USBPD stack. In this mode, the protocol information on the CC lines is decoded, and no protocol action may be triggered. But in the standalone sink mode, some protocol actions may be executed.

In both modes, the UCPD block port 1 is used, and may give an example for a customer application.

The STM32G071B-DISCO USB-C Discovery kit has been designed to run on

STM32G071B-DISCO (MB1378).

Figure 1. STM32G071B-DISCO USB-C Discovery kit

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1

Contents

Contents

1

2

3

4

5

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Demonstration description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1

Demonstration package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2

Demonstration architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2.1

1.2.2

1.2.3

Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

HAL level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Middleware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3

STM32G071RB resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3.1

1.3.2

1.3.3

Hardware resources used by the UCPD demonstration . . . . . . . . . . . . . 9

Peripherals used by the UCPD demonstration . . . . . . . . . . . . . . . . . . . 10

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Demonstration functional description . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1

Demo startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1.1

Normal processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2

UCPD demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.1

2.2.2

Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

LED indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Hardware settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1

STM32G071B-DISCO board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Software settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1

Clock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2

Programming the demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2.1

4.2.2

Using Binary file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Using preconfigured projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1

Demonstration Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2

Application overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.1

5.2.2

5.2.3

5.2.4

Spy mode case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Standalone sink case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Demonstration menu details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

STM32CubeMonitor USB Type-C PD tool with G0 Discovery kit . . . . . 22

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5.2.5

Dynamic memory use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3

Middlewares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3.1

5.3.2

USB PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

FreeRTOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6

7 Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table of references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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3

List of tables

List of tables

UM2546

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

STM32G071RBT peripherals used by the UCPD demonstration . . . . . . . . . . . . . . . . . . . . 10

STM32G071RBT demonstration interrupts usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

LED assignation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Main application functions description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Main applications functions description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Code example: MOSFET control in spy mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

RAM/ROM consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table of acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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UM2546

List of figures

List of figures

Figure 1.

STM32G071B-DISCO USB-C Discovery kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

Demonstration folder organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3.

Discovery folder organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4.

STM32G071B-DISCO USB-C Discovery kit firmware - Software architecture . . . . . . . . . . . 7

Figure 5.

STM32G071RBT hardware blocs used by the UCPD demonstration . . . . . . . . . . . . . . . . . 9

Figure 6.

STM32G071RBT peripherals used by the UCPD demonstration . . . . . . . . . . . . . . . . . . . . 10

Figure 7.

Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8.

LED indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 9.

STM32G071B-DISCO top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 10.

STM32G071B-DISCO bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 11.

STM32G0 software architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 12.

CC lines isolation/pull down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 13.

Menu sequence in spy mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 14.

Menu sequence in standalone sink mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 15.

Welcome screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 16.

Attach screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 17.

PD capability screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 18.

Power screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 19.

Power role screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 20.

Unchunked mode support screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 21.

Data role screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 22.

Display Port screen (only standalone mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 23.

Power delivery information screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 24.

Source profile screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 25.

Distant Sink profile screen (only standalone mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 26.

Action screen (only standalone mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 27.

Version screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 28.

STM32CubeMonitor USB Type-C PD tool debug trace selection. . . . . . . . . . . . . . . . . . . . 23

Figure 29.

STM32G0 top and bottom view of Discovery board (MB1378). . . . . . . . . . . . . . . . . . . . . . 23

Figure 30.

Trace example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 31.

Full STM32CubeMonitor USB Type-C PD tool example . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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5

Demonstration description

The demonstration has been designed with the following objectives:

• Toolkit with low memory consumption

• Modular applications: independents with high level of reuse

• Basic menu navigation through joystick

• Comprehensive G0 functional coverage

Figure 2 shows the demonstration folder organization:

Figure 2. Demonstration folder organization

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The demonstration sources are located in the "Projects" folder of the STM32Cube package for each supported board, here in STM32G071B-DISCO folder.

The demonstration firmware aims at demonstrating how USB-PD version PD3.0 has been implemented in the context of STM32G0xx devices.

Figure 3 illustrates the organization of the UCPD folder.

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UM2546 Demonstration description

Figure 3. Discovery folder organization

UCPD_Analyzer sub-folders:

• Inc: Analyzer application header files

• Src: Analyzer application implementation

• Software development environments:

– EWARM: IAR embedded workbench

– MDK ARM: Keil Microcontroller Development Kit

– SW4STM32: System workbench for STM32

The top level software architecture of the STM32G071B-DISCO USB-C Discovery kit firmware is represented on Figure 4. The software elements mentioned in this diagram are briefly depicted in dedicated sections.

Figure 4. STM32G071B-DISCO USB-C Discovery kit firmware - Software architecture

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Demonstration description UM2546

1.2.1 Analyzer

The UCPD Analyzer application uses only one G0 port which mainly consists in Type-C connection/disconnection detection and Type-C power contract negotiation.

HAL level layer consists in the stm32g0xx.HAL drivers together with the STM32G071B-

DISCO board support package (BSP).

1.2.3 Middleware

The middleware provides the following modules:

• FreeRTOS: FreeRTOS open source solution. UCPD application is based on

FreeRTOS.

• USBPD: USB-PD software stack

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UM2546 Demonstration description

1.3.1 Hardware resources used by the UCPD demonstration

Figure 5. STM32G071RBT hardware blocs used by the UCPD demonstration

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UM2546 Rev 2 9/30

29

Demonstration description

1.3.2 Peripherals used by the UCPD demonstration

UM2546

Figure 6. STM32G071RBT peripherals used by the UCPD demonstration

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Table 1. STM32G071RBT peripherals used by the UCPD demonstration

Peripheral Usage description

SPI

GPIO

I2C

UCPD

DMA

LCD is controlled through SPI1. Write accesses to the LCD are performed to display strings and bitmaps during the UCPD demonstration execution.

The GPIO pins connected to the joystick are used to interact with the UCPD demonstration (e.g. menu navigation).

One GPIO pin is used to detect the door position

Several GPIOs are used to drive some indication LEDs

I2C1 is used to control 3 different INA230:

– Two INA230 to detect the voltage level on both CC lines

– One INA230 to monitor the voltage and the current on VBUS

UCPD1 is used to manage the USB Type-C communication over the Type-C port.

DMA is used for ADC conversions.

1.3.3 Interrupts

Table 2 shows all the external interrupts used by the demonstration

Table 2. STM32G071RBT demonstration interrupts usage

Interrupt Usage description

Systick

EXTI line 0

Delay management

Joystick SEL (interrupt mode, rising edge)

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UM2546 Demonstration description

UCPD

Table 2. STM32G071RBT demonstration interrupts usage (continued)

Interrupt Usage description

EXTI line 2

EXTI line 3

EXTI line 7

EXTI line 1

EXTI line 13

DMA1 Channel1

ADC1_COMP

Joystick UP (interrupt mode, rising edge)

Joystick DOWN (interrupt mode, rising edge)

Joystick RIGHT (interrupt mode, rising edge)

Joystick LEFT (interrupt mode, rising edge)

Tamper (interrupt mode, rising edge)

DAC/ADC conversions completion

ADC analog watchdogs

UCPD related interrupts (e.g. Rx message received, Rx ordered set detected, Transmit message sent, …)

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Demonstration functional description UM2546

If the STM32G071B-DISCO is powered from the micro USB, after a board reset, at demo startup the welcome screen is displayed.

Depending on the position of the switch, the analyzer may run in two modes:

Figure 7. Mode selection

The mode selection is confirmed by the LED LD6:

Figure 8. LED indications

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UM2546 Demonstration functional description

LD1

LD4

LD5

LD6

Green

Orange

Orange

Green

Table 3. LED assignation

Reference Color Name Function

POWER 5V

SINK mode

5V present onto the board

Attached to a power source

SOURCE mode Attached to a device as source

SPY mode SPY mode active

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Hardware settings UM2546

On this kit, no particular setting must be configured.

The G0 Discovery kit may be powered on with a micro USB cable, or it may power itself using the VBUS, when connected to a type C Source.

For detailed information on the hardware part, please check STM32G0 Discovery kit for

USB Type-C™ and Power Delivery user manual (UM2401)

The STM32Cube demonstration supports STM32G071RB device and runs on

STM32G071B-DISCO board from STMicroelectronics.

Figure 9. STM32G071B-DISCO top view Figure 10. STM32G071B-DISCO bottom view

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UM2546 Software settings

STM32G071 internal clocks are derived from the HSI running at 16Mhz.

In this demo application, the various system clocks are configured as follows:

• System clock is set to 64 MHz: the PLL is used as the system clock source.

• HCLK frequency is set to 64 MHz.

The user may program the demonstration using two methods:

To program demonstration's binary image into the internal Flash memory, the user may exercise STM32G071B-DISCO_USBPD_Analyzer.hex file, thanks to ST-Link Utility or

STM32CubeProgrammer.

Please refer to the Binary Resources Demo in the Board web page STM32G071B-DISCO

(https://www.st.com/en/evaluation-tools/stm32g071b-disco.html).

Select the folder corresponding to the preferred toolchain (MDK-ARM, EWARM or

SW4STM32).

• Open USBPD_Analyzer project and rebuild all sources.

• Load the project image through the debugger.

• Restart the evaluation board (press B1: reset button).

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Software description

Figure 11. STM32G0 software architecture overview

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Following sections detail:

• Application: in charge to initialize demo application, HAL, interrupt handler and launch the main module

• Middleware: FreeRTOS, USBPD

The application goal is to prepare demonstration startup, by initializing all the HW/SW.

Table below provides a description of all the actions performed by the different functions in main.c

Main

Table 4. Main application functions description

Functions (Main.c) Description

SystemClock_Config

Initialize the HAL, configure the clock and the power

MOS, depending on the door position, initialize the responder for the STM32CubeMonitor USB Type-C PD tool (GUI_Init), start the stack (USBPD_DPM_InitCore), the UCPD application (USBPD_DPM_UserInit), start the

OS (USBPD_DPM_InitOS), and then start the demonstration

Set the right clocks for flash and RCC

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UM2546 Software description

The file "stm32g0xx_it.c" is also part of the application and is used, as usual, to map the interrupt vector on the driver HAL driver, depending on the module requirement (for debug trace, and joystick management)

Main demonstration functionalities are in the file demo_disco.c.

Table 5. Main applications functions description

Functions (demo_disco.c) Description

DEMO_Manage_spy

DEMO_Manage_event

Display_add_spymsg

DEMO_SPY_Handler

DEMO_InitBSP

Check_cc_attachement

DEMO_PostMMIMessage

*_menu_nav

*_menu_exec

Intialize_RX_processing

This is the main spy function. It gets the VBUS voltage and current from the INA230, and gets the voltage level of both CC lines. If the message queue has some messages to process, Display_add_spymsg is called

Main function for standalone mode.

Function goal is to fill the USB PD data structures with the information received from the CC lines. These structures are then used by the application, to feed the G0 disco information display.

This function is called on any UCPD event thanks to an interrupt. It posts the USBPD protocol message seen from the CC lines to a queue. Later, the application reads this queue and decode the protocol messages. We don’t decode the message under interrupt state, to be ready as soon as possible to see the next messages on the CC lines.

Initialise the LCD, and the voltage monitoring of VBUS and CC lines.

Used in case of spy mode: to detect which CC line is used for power delivery protocol exchanges.

Function that posts the joystick press event in a

FreeRTOS queue, thanks to

HAL_GPIO_EXTI_Rising_Callback function.

Function that is used to manage the joystick up and down press to navigate into a specific menu (source power profiles, sink power profiles, extended capabilities, command…)

Function that executes the selected specific action (select power profile, command…)

Configures the UCPD IP (DMA, Interrupts) to be ready to capture UCPD messages.

Depending on the door position (GPIO DOOR_SENSE_PIN: PC8), two different subapplications may be executed.

In the spy case, USBPD stack is not launched. INA230 is used to know which CC line is selected for communication, and then decode the messages on it.

In the standalone mode, the full USBPD stack is running.

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Software description UM2546

In spy mode, the door is open, and the Discovery kit may receive a second plug to spy the messages exchanges.

In spy mode, the Discovery kit must not interfere with the two type C devices to which it is connected.

This is why, as soon as open door is detected, T2, T3 and T5 MOSFETs are turned ON.

Table 6. Code example: MOSFET control in spy mode

BSP_MOSFET_On(MOSFET_ENCC1);

BSP_MOSFET_On(MOSFET_ENCC2);

Door is open, RD56 (5K1 Ohms) is ignored (needed only for standalone mode to be seen as a sink), and CC1 and CC2 pins are connected from the G0 UCPD IP.

Figure 12. CC lines isolation/pull down if no micro USB is plugged, as soon as the source device detects the sink device, VBUS is driven, and the G0 Discovery kit is powered on.

Here are the menus sequence. Details on the menus in following

Section 5.2.3

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Figure 13. Menu sequence in spy mode

Software description

In standalone mode, the board is in captive cable configuration. Only CC1 line is used for power delivery protocol exchanges.

In this mode, application may boot from the VBUS provided by the source. So dead battery indication may be provided and Rd resistors on the CC1 line must be shown.

This is why when the door is closed, the T5 MOSFET is enabled and RD_CC1 signal is

driven so that the resistor R56 is set between CC1_P and GND. See details in Figure 12 .

In the standalone spy case, some specific actions may be requested using the joystick

(select the power profile…), thus menus sequence is a little bit different from the one in spy mode configuration.

Details on the menus in following

Section 5.2.3

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Software description

Figure 14. Menu sequence in standalone sink mode

UM2546

5.2.3 Demonstration menu details

Figure 15. Welcome screen

When the G0 disco is powered on (if micro USB is plugged or VBUS driven on the type C cable) this screen is visible.

Figure 16. Attach screen

Whenever a VBUS is present on the type C cable, this information is displayed. Then, depending on the source capabilities seen, dual role information may be displayed.

Figure 17. PD capability screen

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If USBPD protocol exchanges are seen over the CC lines, the power delivery specification version is displayed. This information may appear in spy mode, even if one device doesn't support power delivery

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UM2546 Software description

Figure 18. Power screen

When the source capabilities are seen over the CC lines, the maximum power profile is displayed.

Figure 19. Power role screen

This screen will indicate if the power role swap is supported by the connected source device.

Figure 20. Unchunked mode support screen

This screen will indicate if the connected source device supports unchunked messages.

Figure 21. Data role screen

This screen will indicate if the connected source device supports data role swap.

Figure 22. Display Port screen (only standalone mode)

If the source is capable of using the super speed lines to send display port video signal, the information is displayed. This screen also displays if Thunderbolt capability is available. This information is gathered only in standalone sink mode, because the G0 issues a Discovery identity message. In some case, the source may not respond to this message, and therefore no information may be retrieved.

Figure 23. Power delivery information screen

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Software description UM2546

This screen displays the current VBUS power: voltage and current, and calculated power.

Figure 24. Source profile screen

This screen displays all source power profiles. The user scrolls the list via the joystick. In case of standalone sink mode, he may request a dedicated power profile using the joystick

(center click on the desired profile)

Figure 25. Distant Sink profile screen (only standalone mode)

This screen displays the sink profiles. This information is retrieved only in standalone sink mode, because a dedicated command (get sink capabilities) is sent by the G0 disco application. No actions or selection may be triggered here on a distant sink profile.

Figure 26. Action screen (only standalone mode)

On this screen, the user may execute the displayed commands using the joystick. (center to select). He may scroll up or down to access all possible actions.

Figure 27. Version screen

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This screen displays the current G0 Discovery demonstration version.

We remind the user that the STM32CubeMonitor USB Type-C PD tool application may be run on a PC to get more details about the USBPD protocol messages that are exchanged.

See chapter 5.2.4.

We recommend to always plug the micro USB cable so that the disco is powered on, and have the possibility to see the details on the USBPD protocol exchanges.

In case of spy mode, as no action may be requested using the G0 disco, only the trace is available.

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UM2546 Software description

Figure 28. STM32CubeMonitor USB Type-C PD tool debug trace selection

Figure 29. STM32G0 top and bottom view of Discovery board (MB1378)

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Software description

The user gets such a screen:

Figure 30. Trace example

UM2546

When the G0 disco application is used in standalone sink mode, the full

STM32CubeMonitor USB Type-C PD tool application (GUI) may be used to issue some commands like a data role swap for example.

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UM2546 Software description

Figure 31. Full STM32CubeMonitor USB Type-C PD tool example

5.2.5

For more details see STM32CubeMonitor-UCPD software tool for USB Type-C™ Power

Delivery port management user manual (UM2468).

Dynamic memory use

The demonstration is currently using:

• CSTACK = 0x300

• HEAP = 0x800

5.3 Middlewares

In this application the USBPD stack used is delivered as a library.

All information regarding this library may be found in the STM32Cube USBPD stack user manual (UM2552) .

5.3.2 FreeRTOS

FreeRTOS: FreeRTOS open source solution.

More details may be found at: https://freertos.org

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Footprint

6 Footprint

UM2546

This chapter sums up Ram / Rom consumption per software blocks.

Here is a full demonstration of the software consumption:

Full demonstration software

Table 7. RAM/ROM consumption

Read only code memory [Byte]

Read only data [Byte]

STM32CubeMonitor USB Type-C PD tool responder (GUI)

Demo Application

Policy Engine (PE)

Stack Protocol layer (PRL)

Cable detection (CAD)

Drivers

HAL

Physical

Debug- Trace

FreeRTOS

Standard Libraries

G0 Device

Grand Total

7682

13596

20320

3000

1484

2254

4706

1360

280

5000

5396

1948

67026

-

-

-

1

2345

16

2

-

8802

55

78

22

11321

540

Read/write data memory [Byte]

842

20

12

24

324

40

-

72

15628

5029

65

22596

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UM2546

7 Acronyms

Acronym

CC

USB PD

GUI

PD

DRP

FRS

DRD

VDM

Acronyms

Table 8. Table of acronyms

-

Configuration channel

USB Power Delivery

Graphical User Interface: UCPD PC monitor application

Power Delivery

Dual Role Power

Fast Role Swap

Dual Role Data

Vendor Defined Message

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Table of references

8 Table of references

References

USB-IF. (2017). Universal Serial Bus Power Delivery Specification rev 3.0. USB-IF.

UM2546

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UM2546

Revision history

Date

20-Feb-2019

9-Apr-2019

Revision history

Table 9. Document revision history

Revision Changes

1

2

Initial version

Updated: Figure 13 ,

Figure 14

and Figure 20

Unchunked Mode (UNCKD) replaces Fast Role Swap

(FRS)

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UM2546

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