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Example Summary

This example implements an I2C Controller using the MSP Communication modules - I2C. This example demonstrates sending commands to an I2C Target to read from or write to its memory address and shows the response.

Peripherals & Pin Assignments

Peripheral Pin Function
SYSCTL
I2C0 PA0 I2C Serial Data line (SDA)
I2C0 PA1 I2C Serial Clock line (SCL)
CRC
DEBUGSS PA20 Debug Clock
DEBUGSS PA19 Debug Data In Out

BoosterPacks, Board Resources & Jumper Settings

Visit LP_MSPM0G3507 for LaunchPad information, including user guide and hardware files.

Pin Peripheral Function LaunchPad Pin LaunchPad Settings
PA0 I2C0 SDA J19_2
  • PA0 can be connected to an on-board pull-up resistor
    • J19 1:2 ON Connect to 3.3V Pullup
PA1 I2C0 SCL J20_2
  • PA1 can be connected to an on-board pull-up resistor
    • J20 1:2 ON Connect to 3.3V Pullup
PA20 DEBUGSS SWCLK N/A
  • PA20 is used by SWD during debugging
    • J101 15:16 ON Connect to XDS-110 SWCLK while debugging
    • J101 15:16 OFF Disconnect from XDS-110 SWCLK if using pin in application
PA19 DEBUGSS SWDIO N/A
  • PA19 is used by SWD during debugging
    • J101 13:14 ON Connect to XDS-110 SWDIO while debugging
    • J101 13:14 OFF Disconnect from XDS-110 SWDIO if using pin in application

Device Migration Recommendations

This project was developed for a superset device included in the LP_MSPM0G3507 LaunchPad. Please visit the CCS User’s Guide for information about migrating to other MSPM0 devices.

Low-Power Recommendations

TI recommends to terminate unused pins by setting the corresponding functions to GPIO and configure the pins to output low or input with internal pullup/pulldown resistor.

SysConfig allows developers to easily configure unused pins by selecting Board→Configure Unused Pins.

For more information about jumper configuration to achieve low-power using the MSPM0 LaunchPad, please visit the LP-MSPM0G3507 User’s Guide.

Example Usage

Connect SDA and SCL of I2C Controller to SDA and SCL of I2C Target respectively. Compile, load and run the example.

Please refer to MSPM0 Communication Modules - I2C User Guide for more details.