SLAA721E October   2016  – March 2020 MSP430FR5969 , MSP430FR5969-SP , MSP430FR5994 , MSP430FR6989

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Glossary
    2. 1.2 Conventions
  3. 2Implementation
    1. 2.1 Main
    2. 2.2 Application Manager
      1. 2.2.1 Bootloader and Application Detection
        1. 2.2.1.1 Forcing Bootloader Mode
        2. 2.2.1.2 Application Validation
        3. 2.2.1.3 Jumping to Application
      2. 2.2.2 Memory Assignment
      3. 2.2.3 Interrupt Vectors in FRAM Devices
    3. 2.3 Memory Interface (MI)
      1. 2.3.1 Dual Image Support
    4. 2.4 Communication Interface (CI)
      1. 2.4.1 Physical-DataLink (PHY-DL)
        1. 2.4.1.1 UART
        2. 2.4.1.2 SPI
        3. 2.4.1.3 CC110x
        4. 2.4.1.4 Comm Sharing
      2. 2.4.2 NWK-APP
        1. 2.4.2.1 BSL-Based Protocol
          1. 2.4.2.1.1 Security
          2. 2.4.2.1.2 BSL-Based Protocol Using CC110x
          3. 2.4.2.1.3 Examples Using UART or CC110x
  4. 3Customization of MSP430FRBoot
    1. 3.1 Predefined Customizations
  5. 4Building MSPBoot
    1. 4.1 LaunchPad™ Development Kit Hardware
    2. 4.2 CC110x Hardware
    3. 4.3 Software
      1. 4.3.1 Building the Target Software
      2. 4.3.2 Convert Application Output Images
      3. 4.3.3 Generating Linker Files
  6. 5Demo Using FRAM LaunchPad Development Kit as Host
    1. 5.1 Hardware
    2. 5.2 Building the Host Project
    3. 5.3 Running the Demo
  7. 6Porting the target side example projects to other MSP430FR devices
  8. 7References
  9. 8Revision History
2.4.2.1.3 Examples Using UART or CC110x

The following considerations apply when using UART with BSL-based protocol:

  • Address is not required, because communication is expected to be point-to-point.
  • All bytes in UART are in 8-N-1 format as described in Section 2.4.1.1.
  • The target responds with the command result when ready and not when requested by the host.
  • The host should wait for the response from the target after sending a command, preferably with a time-out.
  • Different commands have different processing times.
  • Example: Host erases the microcontroller application area.
    0x800x010x150x640xA3
    HeaderLengthERASE_APPChecksum_LChecksum_H

    The target device processes the command and responds with the result when ready.

    0x00
    OK

The same considerations apply when using a CC110x with BSL-based protocol. The exception to this is Section 2.4.2.1.2 where it is stated that all bytes received in packets from the CC110x are in the same format expected for BSL-based protocol; therefore, they can be directly transferred from the PHY-DL to the NWK-APP. Although processing times are the same, over-the-air communication can be expected to be slightly slower than UART, and host wait times should be lengthened to compensate.