SWRU622A August   2024  – September 2024 AWRL1432 , AWRL6432 , IWRL1432 , IWRL6432 , IWRL6432AOP

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Basic Bootloader Flow
    1. 2.1 Programming Serial Data Flash Over UART (Bootloader Service)
    2. 2.2 Binary File Format
    3. 2.3 Flash Programming Sequence
    4. 2.4 Supported UART Commands/Response and Format
    5. 2.5 Flashing Sequence
    6. 2.6 ROM-Assisted Image Download Sequence
    7. 2.7 Booting Application Image
      1. 2.7.1 Booting From Serial Flash
      2. 2.7.2 Bootmode – SPI
      3. 2.7.3 Bootmode - UART
  5. 3Secondary Bootloader
    1. 3.1 SBL Execution Flow
      1. 3.1.1 Flash Memory Partitioning for SBL Execution
      2. 3.1.2 SBL Feature Modifications
      3. 3.1.3 SBL Development Considerations
  6. 4Warm Reset
    1. 4.1 Integrity Verification
    2. 4.2 LSTC/PBIST
    3. 4.3 Watchdog Timer
    4. 4.4 Reset-Triggered Flash Reload of Application
      1. 4.4.1 Hardware Solutions
        1. 4.4.1.1 PMIC I2C Messaging
        2. 4.4.1.2 External Watchdog Timer
        3. 4.4.1.3 External Voltage Monitoring or Voltage Supervisors
      2. 4.4.2 Software Solutions
        1. 4.4.2.1 Setting Boot Vector to 0x0
  7. 5Relevant Registers
    1. 5.1 Reset Registers
    2. 5.2 PC Registers
      1. 5.2.1 Addresses
  8. 6Revision History

2.1 Programming Serial Data Flash Over UART (Bootloader Service)

The xWRLx432 device from TI can be configured to operate as an autonomous radar sensor. In this configuration, the user application and TI firmware patches are hosted in an SDF interfaced to the xWRLx432 over the QSPI port.

SDF programming supports downloading meta images that are a combination of the following components:

  • User application image for M4F (application subsystem)
  • Firmware patches

The flash programmer connects to the device over UART-B. Specifics are as follows:

  • UART of the xWRLx432 device:
    • RX: Ball F11/J11
    • TX: Ball E10/L12
  • Baud rate: 115200
  • Data length: 8bit
  • Stop bit: 1bit
  • Parity: None
  • Maximum Data Chunk Size: 240bytes
    Note:

    Commands ‘Write File to SFLASH’ and ‘Write File to SRAM’ support a maximum data chunk size of 240 bytes only.

    The file is split into N commands where

    N = (file size/240) + ((file size%240) ? 1 : 0)