Reusable ARM software components

Boot Software for SAMV71, SAMQ21RT

Main characteristics

• Based on SAVOIR Flight Computer Initialization Sequence Generic Specification
• Pre-qualified for criticality C (ATSAMV71Q21, SAMV71Q21RT)
• Pending qualification to criticality B in 2021, free of charge update to criticality B version
• Developed during ESA contracts in compliance to ECSS-E-ST-40C and ECSS-Q-ST-80C
• Documented high code and decision coverage
• ECSS compliant documentation and test data pack

TC/TM link

• PUS-C TC/TM stack with data model defined in ASN.1
• TC/TM link available on UART interface
• Functionalities provided by PUS-C services: 1, 5, 6, 8, 17
• Delivered with ASN.1 source files and ICD generated by asn1scc compiler

Self-test features

• Initialization self-test performing following checks
  • Bootloader integrity
  • SRAM  and SDRAM memory tests
  • Functionality of SPI, UART, CAN, Ethernet

Application booting and patching

• Bootloader code executed from non-volatile internal Flash memory
• Boot and death reports accessible through PUS interface
• Configurable application source: internal Flash or external QSPI Flash
• Configurable application destination: Internal SRAM or external SDRAM

Configuration capabilities

• Configuration vector allowing to
  • Set default application software image header
  • Select bootloader standby mode
  • Disable/enable memory caches
  • Disable self-testing
• Additional custom configuration and delta qualification possible

Bootloader and BSP pre-qualification status

• ATSAMV71Q21 & SAMV71Q21RT- available pre-qualified version for criticality C, criticality B pending
• SAMRH71 – available non-qualified version, criticality B pending