Texas Instruments MSP432P401R Manuale utente

User's Guide

SLAU597A–March 2015–Revised July 2015

MSP432P401R LaunchPad™ Development Kit

(MSP

‑‑

EXP432P401R)

The MSP‑EXP432P401R LaunchPad™ is an easy-to-use evaluation module (EVM) for the

MSP432P401R microcontroller. It contains everything needed to start developing on the MSP432 Low-

Power + Performance ARM®32-bit Cortex®-M4F microcontroller (MCU), including on-board emulation for

programming, debugging, and energy measurements. The MSP432P401R device supports low-power

applications requiring increased CPU speed, memory, analog, and 32-bit performance.

Figure 1. MSP‑‑EXP432P401R LaunchPad

LaunchPad, BoosterPack, Code Composer Studio, EnergyTrace, SimpleLink, E2E are trademarks of Texas Instruments.

ARM, Cortex are registered trademarks of ARM Ltd.

IAR Embedded Workbench is a trademark of IAR Systems.

All other trademarks are the property of their respective owners.

SLAU597A–March 2015–Revised July 2015 MSP432P401R LaunchPad™ Development Kit (MSP

‑

EXP432P401R)

www.ti.com

Contents

1 Getting Started............................................................................................................... 3

2 Hardware...................................................................................................................... 5

3 Software Examples ........................................................................................................ 17

4 Resources................................................................................................................... 24

5 FAQ .......................................................................................................................... 28

6 Schematics.................................................................................................................. 32

List of Figures

1 MSP‑EXP432P401R LaunchPad.......................................................................................... 1

2 EVM Overview ............................................................................................................... 5

3 Block Diagram................................................................................................................ 5

4 MSP432P401RIPZ Pinout.................................................................................................. 6

5 XDS110-ET Emulator ....................................................................................................... 7

6 XDS110-ET Isolation Block................................................................................................. 8

7 Application Backchannel UART in Device Manager .................................................................... 9

8 EnergyTrace Technology Preferences .................................................................................. 11

9 EnergyTrace Windows..................................................................................................... 12

10 MSP‑EXP432P401R Power Block Diagram............................................................................ 13

11 LaunchPad to BoosterPack Connector Pinout ......................................................................... 16

12 Out-of-Box GUI Running Locally......................................................................................... 18

13 Out-of-Box GUI Running From TI Cloud Tools......................................................................... 19

14 Backend Block Diagram of CC3100BOOST MQTT-Twitter LED Control Demo................................... 21

15 Importing and Converting an Image With MSP Image Reformer.................................................... 23

16 Using TI Resource Explorer to Browse MSP‑EXP432P401R in MSPWare........................................ 26

17 SWD Mode Settings ....................................................................................................... 28

18 Target Configurations...................................................................................................... 28

19 Launch Selected Configuration........................................................................................... 29

20 Show All Cores ............................................................................................................. 29

21 Connect Target ............................................................................................................. 30

22 MSP432_Factory_Reset Script........................................................................................... 30

23 Schematics (1 of 7) ........................................................................................................ 32

24 Schematics (2 of 7) ........................................................................................................ 33

25 Schematics (3 of 7) ........................................................................................................ 34

26 Schematics (4 of 7) ........................................................................................................ 35

27 Schematics (5 of 7) ........................................................................................................ 36

28 Schematics (6 of 7) ........................................................................................................ 37

29 Schematics (7 of 7) ........................................................................................................ 38

List of Tables

1 Isolation Block Connections................................................................................................ 7

2 Default Clock Operation................................................................................................... 14

3 Hardware Change Log..................................................................................................... 17

4 Software Examples ........................................................................................................ 17

5 IDE Minimum Requirements for MSP‑EXP432P401R ................................................................ 17

6 Source File and Folders................................................................................................... 20

7 How MSP Device Documentation is Organized........................................................................ 27

2MSP432P401R LaunchPad™ Development Kit (MSP

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Getting Started

1 Getting Started

1.1 Introduction

The MSP‑EXP432P401R LaunchPad is an easy-to-use evaluation module (EVM) for the MSP432P401R

microcontroller. It contains everything needed to start developing on the MSP432 Low-Power +

Performance ARM 32-bit Cortex-M4F microcontroller (MCU), including on-board emulation for

programming, debugging, and energy measurements. The MSP432P401R device supports low-power

applications that require increased CPU speed, memory, analog, and 32-bit performance.

Rapid prototyping is simplified by access to the 40-pin headers and a wide variety of BoosterPack™ plug-

in modules that enable technologies such as wireless connectivity, graphical displays, environmental

sensing, and many more. Free software development tools are also available such as TI's Eclipse-based

Code Composer Studio™ (CCS) IDE, IAR Embedded Workbench™ IDE, and Keil µVision IDE. Code

Composer (CCS) supports EnergyTrace™ technology when paired with the MSP432P401R LaunchPad.

More information about the LaunchPad, the supported BoosterPacks, and the available resources can be

found at TI's LaunchPad portal. To get started quickly, and find available resources in MSPWare, visit the

TI Cloud Development Environment.

1.2 Key Features

• Low-power ARM Cortex-M4F MSP432P401R

• 40-pin LaunchPad standard that leverages the BoosterPack ecosystem

• XDS110-ET, an open-source onboard debugger featuring EnergyTrace+ technology and application

UART

• Two buttons and two LEDs for user interaction

• Backchannel UART through USB to PC

1.3 What's Included

1.3.1 Kit Contents

• One MSP‑EXP432P401R LaunchPad Evaluation Kit

• One Micro USB cable

• One Quick Start Guide

1.3.2 Software Examples (Section 3)

• Out-of-Box Software Example

• CC3100BOOST MQTT-Twitter LED Control Example

• BOOSTXL-K350QVG-S1 Graphics Library Example

• 430BOOST-SHARP96 Graphics Library Example

1.4 First Steps: Out-of-Box Experience

An easy way to get familiar with the EVM is by using its preprogrammed out-of-box code. It demonstrates

some key features of the LaunchPad from a user level, showing how to use the pushbutton switches

together with onboard LEDs and basic serial communication with a computer.

A more detailed explanation of the out-of-box demo can be found in Section 3.

SLAU597A–March 2015–Revised July 2015 MSP432P401R LaunchPad™ Development Kit (MSP

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EXP432P401R)

Getting Started

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1.5 Next Steps: Looking Into the Provided Code

It is now time to start exploring more features of the EVM!

www.ti.com/beginMSP432launchpad

To get started, you will need an integrated development environment (IDE) to explore and start editing the

code examples. Refer to Section 4 for more information on IDEs and where to download them.

The out-of-box source code and more code examples can be downloaded from the MSP-EXP432P401R

tool folder. Find what code examples are available and more details about each example in Section 3. All

code is licensed under BSD, and TI encourages reuse and modifications to fit specific needs.

4MSP432P401R LaunchPad™ Development Kit (MSP

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Target Device

MSP432P401R

Crystal

48 MHz

Micro‐B

USB

EnergyTrace+

Current

Measure HW

LDO

5 V, 3.3 V

ESD

Protection

Power

Switch

Debug

MCU

LED

Red, Green

Power, UART, SWD to Target

User Interface

Buttons and LEDs

40‐pin LaunchPad

standard headers

www.ti.com

Hardware

2 Hardware

Figure 2 shows an overview of the EVM hardware.

Figure 2. EVM Overview

2.1 Block Diagram

Figure 3 shows the block diagram.

Figure 3. Block Diagram

SLAU597A–March 2015–Revised July 2015 MSP432P401R LaunchPad™ Development Kit (MSP

‑

EXP432P401R)

1P10.1/UCB3CLK

2P10.2/UCB3SIMO/UCB3SDA

3P10.3/UCB3SOMI/UCB3SCL

4P1.0/UCA0STE

5P1.1/UCA0CLK

6P1.2/UCA0RXD/UCA0SOMI

7P1.3/UCA0TXD/UCA0SIMO

8P1.4/UCB0STE

9P1.5/UCB0CLK

10P1.6/UCB0SIMO/UCB0SDA

11P1.7/UCB0SOMI/UCB0SCL

12VCORE

13DVCC1

14VSW

15DVSS1

16P2.0/PM_UCA1STE

17P2.1/PM_UCA1CLK

18P2.2/PM_UCA1RXD/PM_UCA1SOMI

19P2.3/PM_UCA1TXD/PM_UCA1SIMO

20P2.4/PM_TA0.1

21P2.5/PM_TA0.2

22P2.6/PM_TA0.3

23P2.7/PM_TA0.4

24P10.4/TA3.0/C0.7

25P10.5/TA3.1/C0.6

P7.4/PM_TA1.4/C0.5

P7.5/PM_TA1.3/C0.4

P7.6/PM_TA1.2/C0.3

P7.7/PM_TA1.1/C0.2

P8.0/UCB3STE/TA1.0/C0.1

P8.1/UCB3CLK/TA2.0/C0.0

P3.0/PM_UCA2STE

P3.1/PM_UCA2CLK

P3.2/PM_UCA2RXD/PM_UCA2SOMI

P3.3/PM_UCA2TXD/PM_UCA2SIMO

P3.4/PM_UCB2STE

P3.5/PM_UCB2CLK

P3.6/PM_UCB2SIMO/PM_UCB2SDA

P3.7/PM_UCB2SOMI/PM_UCB2SCL

AVSS3

PJ.0/LFXIN

PJ.1/LFXOUT

AVSS1

DCOR

AVCC1

P8.2/TA3.2/A23

P8.3/TA3CLK/A22

P8.4/A21

P8.5/A20

P8.6/A19

51 P8.7/A18

52 P9.0/A17

53 P9.1/A16

54 P6.0/A15

55 P6.1/A14

56 P4.0/A13

57 P4.1/A12

58 P4.2/ACLK/TA2CLK/A11

59 P4.3/MCLK/RTCCLK/A10

60 P4.4/HSMCLK/SVMHOUT/A9

61 P4.5/A8

62 P4.6/A7

63 P4.7/A6

64 P5.0/A5

65 P5.1/A4

66 P5.2/A3

67 P5.3/A2

68 P5.4/A1

69 P5.5/A0

70 P5.6/TA2.1/VREF+/VeREF+/C1.7

71 P5.7/TA2.2/VREF-/VeREF-/C1.6

72 DVSS2

73 DVCC2

74 P9.2/TA3.3

75 P9.3/TA3.4

P6.2/UCB1STE/C1.5

P6.3/UCB1CLK/C1.4

P6.4/UCB1SIMO/UCB1SDA/C1.3

P6.5/UCB1SOMI/UCB1SCL/C1.2

P6.6/TA2.3/UCB3SIMO/UCB3SDA/C1.1

P6.7/TA2.4/UCB3SOMI/UCB3SCL/C1.0

DVSS3

RSTn/NMI

AVSS2

PJ.2/HFXOUT

PJ.3/HFXIN

AVCC2

P7.0/PM_SMCLK/PM_DMAE0

P7.1/PM_C0OUT/PM_TA0CLK

P7.2/PM_C1OUT/PM_TA1CLK

P7.3/PM_TA0.0

PJ.4/TDI/ADC14CLK

PJ.5/TDO/SWO

SWDIOTMS

SWCLKTCK

P9.4/UCA3STE

P9.5/UCA3CLK

P9.6/UCA3RXD/UCA3SOMI

P9.7/UCA3TXD/UCA3SIMO

100

P10.0/UCB3STE

Hardware

www.ti.com

2.2 MSP432P401R

The MSP432P401R is the first MSP432 family device featuring low-power performance with an ARM

Cortex-M4F core. Device features include:

• Low-power ARM Cortex-M4F MSP432P401R

• Up to 48-MHz system clock

• 256KB flash memory, 64KB SRAM, and 32KB ROM with MSPWare libraries

• Four 16-bit timers with capture/compare/PWM, two 32-bit timers, and RTC

• Up to eight serial communication channels (I2C, SPI, UART, and IrDA)

• Analog: 14-bit SAR ADC, capacitive touch, comparator

• Digital: AES256, CRC, uDMA

Figure 4. MSP432P401RIPZ Pinout

6MSP432P401R LaunchPad™ Development Kit (MSP

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EXP432P401R) SLAU597A–March 2015–Revised July 2015

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Hardware

2.3 XDS110-ET Onboard Emulator

To keep development easy and cost effective, TI's LaunchPad evaluation kits integrate an onboard

emulator, which eliminates the need for expensive programmers. The MSP‑EXP432P401R has the

XDS110-ET emulator, which is a simple low-cost debugger that supports nearly all TI ARM device

derivatives.

Figure 5. XDS110-ET Emulator

The XDS110-ET hardware can be found in the schematics in Section 6 and in the MSP‑EXP432P401R

Hardware Design Files.

2.3.1 XDS110-ET Isolation Block

The isolation block is comprised of switch S101 and the accompanying jumpers next the switch.

The isolation block allows the user to connect or disconnect signals that cross from the XDS110-ET

domain into the MSP432P401R target domain. This crossing is shown by the dotted line across the

LaunchPad. No other signals cross this domain, so the XDS110-ET can be decoupled from the

MSP432P401R target side. This includes XDS110-ET Serial Wire Debug signals, application UART

signals, and 3.3-V and 5-V power.

Table 1 lists the signals that are controlled at the isolation block.

Table 1. Isolation Block Connections

Signal Isolation Type(1)(2) Description

5V Jumper 5-V power rail, VBUS from USB

3V3 Jumper 3.3-V power rail, derived from VBUS by an LDO in the XDS110-ET domain

Backchannel UART: Ready-To-Send, for hardware flow control. The target can use

RTS >> Jumper* this to indicate whether it is ready to receive data from the host PC. The arrows

indicate the direction of the signal.

Backchannel UART: Clear-To-Send, for hardware flow control. The host PC (through

CTS << Jumper* the emulator) uses this to indicate whether it is ready to receive data. The arrows

indicate the direction of the signal.

Backchannel UART: The target MCU receives data through this signal. The arrows

RXD << Jumper indicate the direction of the signal.

Backchannel UART: The target MCU sends data through this signal. The arrows

TXD >> Jumper indicate the direction of the signal.

RST Switch S101 MCU RST signal (active low)

TCK_SWCLK Switch S101 Serial wire clock input (SWCLK) / JTAG clock input (TCK)

(1) Jumper* corresponds to signals without a jumper placed by default.

(2) Switch* corresponds to signals that are controlled by S101, but not through IC111.

SLAU597A–March 2015–Revised July 2015 MSP432P401R LaunchPad™ Development Kit (MSP

‑

EXP432P401R)

XDS110-ET

Emulator MCU

Isolation

Block

JTAG and SWD

Application UART

3.3V Power

5V Power

MSP432P401R

Target MCU

XDS110-ETMSP432 Target

USB Connector

in out

LDO

BoosterPack Header

USB

EnergyTrace

S101

eUSCI_A0

Hardware

www.ti.com

Table 1. Isolation Block Connections (continued)

Signal Isolation Type(1)(2) Description

TMS_SWDIO Switch S101 Serial wire data input/output (SWDIO) / JTAG test mode select (TMS)

TDO_SWO Switch S101 Serial wire trace output (SWO) / JTAG trace output (TWO) (Also PJ.5)

TDI Switch* S101 JTAG test data input (Also PJ.4)

Reasons to open these connections:

• To remove any and all influence from the XDS110-ET emulator for high accuracy target power

measurements

• To control 3-V and 5-V power flow between the XDS110-ET and target domains

• To expose the target MCU pins for other use than onboard debugging and application UART

communication

• To expose the UART interface of the XDS110-ET so that it can be used for devices other than the

onboard MCU.

Figure 6. XDS110-ET Isolation Block

2.3.2 Application (or "Backchannel") UART

The XDS110-ET provides a "backchannel" UART-over-USB connection with the host, which can be very

useful during debugging and for easy communication with a PC. The provided UART supports hardware

flow control (RTS and CTS); although by default these signals are not connected to the target.

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Hardware

The backchannel UART allows communication with the USB host that is not part of the target application's

main functionality. This is very useful during development, and also provides a communication channel to

the PC host side. This can be used to create GUIs and other programs on the PC that communicate with

the LaunchPad.

The pathway of the backchannel UART is shown in Figure 7. The backchannel UART eUSCI_A0 is

independent of the UART on the 40-pin BoosterPack connector eUSCI_A2.

On the host side, a virtual COM port for the application backchannel UART is generated when the

LaunchPad enumerates on the host. You can use any PC application that interfaces with COM ports,

including terminal applications like Hyperterminal or Docklight, to open this port and communicate with the

target application. You need to identify the COM port for the backchannel. On Windows PCs, Device

Manager can assist.

Figure 7. Application Backchannel UART in Device Manager

The backchannel UART is the XDS110 Class Application/User UART port. In this case, Figure 7 shows

COM156, but this port can vary from one host PC to the next. After you identify the correct COM port,

configure it in your host application according to its documentation. You can then open the port and begin

communication to it from the host.

The XDS110-ET has a configurable baud rate; therefore, it is important that the PC application configures

the baud rate to be the same as what is configured on the eUSCI_A0 backchannel UART.

SLAU597A–March 2015–Revised July 2015 MSP432P401R LaunchPad™ Development Kit (MSP

‑

EXP432P401R)

Hardware

www.ti.com

The XDS110-ET also supports hardware flow control, if desired. Hardware flow control (CTS and RTS

handshaking) allows the target MSP432P401R and the emulator to tell each other to wait before sending

more data. At low baud rates and with simple target applications, flow control may not be necessary.

Applications with higher baud rates and more interrupts to service have a higher likelihood that the will not

be able to read the eUSCI_A0 buffer in time, before the next byte arrives. If this happens, the eUSCI_A0

will report an overrun error.

2.3.3 Using an External Debugger Instead of the Onboard XDS110-ET

Many users have a specific debugger that they prefer to use, and may want to bypass the XDS110-ET to

program the target MCU. This is enabled by switch S101 and connector J102. Using an external debugger

is simple, and full JTAG access is provided through J102.

1. Switch S101 to the external debug position (to the right)

2. Plug any ARM debugger into J102

(a) J102 follows the ARM Cortex Debug Connector standard outlined here

(b) Note that J102 is not keyed, ensure proper orientation of the debug cable, pin 1 of J102 is on the

bottom right side

3. Plug USB power into the LaunchPad, or power it externally

(a) Ensure that the jumper across 3V3 is connected if using USB power

(b) External debuggers do not provide power, the VCC pin is a power sense pin

2.3.4 Using the XDS110-ET Emulator With a Different Target

The XDS110-ET emulator on the LaunchPad can interface to most ARM derivative devices, not just the

on-board MSP432P401R target device.

This is not a common use case, but for users who want this functionality, there is a way to enable it.

Connector J103 was added to expose all the necessary programming and power signals. J103 is a 50 mil

spaced 7-pin header. By default it is not populated, so the user will have to populate a connector or

directly solder in wires.

When using the XDS110-ET with a different target, the jumpers in the isolation block should be removed,

and switch S101 moved to the external debug position. This will disconnect the XDS110-ET from the

MSP432P401R target and enable debug of an external device. Because only the SWD signals are

exposed, the user needs to set the debugger settings to SWD (without SWO) in the IDE. See the IDE

specific MSP432 user's guides for more details on this setting.

To debug other external devices, there are many options in the ARM debugging ecosystem including the

XDS100v2/3 and XDS200 from Texas Instruments. There are many other options including IAR I-jet, Keil

ULINK, and Segger J-Link.

2.3.5 EnergyTrace+ Technology

EnergyTrace™ technology is an energy-based code analysis tool that measures and displays the

application's energy profile and helps to optimize it for ultra-low power consumption.

MSP432 devices with built-in EnergyTrace+[CPU State] (or in short EnergyTrace+) technology allow real-

time monitoring of internal device states while user program code executes.

EnergyTrace+ technology is supported on the LaunchPad MSP432P401R device + XDS110-ET debugger.

EnergyTrace technology is available as part of TI's Code Composer Studio IDE. During application debug,

additional windows are available for EnergyTrace technology.

To enable EnergyTrace technology, go to:

• Window > Preferences > Code Composer Studio > Advanced Tools > EnergyTrace™ Technology

• Check the Enable Auto-Launch on target connect box

10 MSP432P401R LaunchPad™ Development Kit (MSP

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