STMicroelectronics provides a comprehensive portfolio of robust 8-bit microcontrollers and high-performance 32-bit ARM-based microcontrollers with a wide range of peripherals.
IAR Embedded Workbench® for ARM provides device support on these levels:
Core support
Instruction set support in compiler, assembler, linker and debuggers
Header/DDF files
Peripheral register names in C/assembler source and debugger as well as device setup configuration files
Flash loader
For on-chip flash or off-chip EVB flash
Project examples
Varies from simple to fairly complex applications