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Example Summary

ISecondary Bootloader supports programming / verifying data in the memory, with same BSL protocol format as Primary BSL (ROM BSL) in the device. It can be invoked in the same way as the ROM BSL.

It supports the following major functions

It uses I2C interface to communicate with the Host

This example takes care of secondary Bootloader implementation as well as the registration of it. Hence once this image is loaded to the device, the primary Bootloader in the device can’t be used. Only the secondary Bootloader will be active. To revert the device to use primary Bootloader SWD_Factory_Reset command has to be used.

For more details refer to BSL User Guide.

This example can be used to create custom Bootloader.

NOTE:

  1. While creating Custom Bootloader make sure that, Flash region in which the custom Bootloader resides is Static write protected in the BCR configuration. Otherwise there are chances for device to get locked during the Bootloading process.
  2. The default password is given as all ‘0xFFFFFFFF’. It can be changed in secondary_bsl.c
  3. The values of the defines BSL_SRAM_BUF_START_ADDR, BSL_STACK_SIZE has to be changed according to the SRAM usage.

NOTE: This BSL example uses a provided ti_msp_dl_config.h file that is not generated by SysConfig, and it’s recommended to use this provided file. If it’s necessary to generate Driverlib configuration files (ti_msp_dl_config.h/c), copy the content of the generated ti_msp_dl_config.h file into the provided version.

Peripherals & Pin Assignments

Peripheral Pin Function
DEBUGSS PA20 Debug Clock
DEBUGSS PA19 Debug Data In Out

BoosterPacks, Board Resources & Jumper Settings

Visit LP_MSPM0L1306 for LaunchPad information, including user guide and hardware files.

Pin Peripheral Function LaunchPad Pin LaunchPad Settings
PA20 DEBUGSS SWCLK J2_13
  • 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 J2_17
  • 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_MSPM0L1306 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-MSPM0L1306 User’s Guide.

Example Usage

Connect I2C_SDA and I2C_SCL with the BSL Host (any microcontroller with I2C).

Compile, load the example.

Create BSL invocation condition using BSL Invoke pin or any other invocation methods. Send Connection command from the host. BSL Acknowledgement should be received. Send GetDeviceInfo command from the host. BSL should respond back with the version information and SRAM buffer space available.

Similarly Send erase, program, verification commands to program data in the memory.