ThreadX for H8/300H

Highlights

• Complete H8/300H Advanced Mode support
• Hitachi Development Tool Support
• Reasonable pricing
• No Royalties
• Complete ANSI C source code
• Easy to use and powerful services
• Responsive Technical Support
• Unlimited Threads, Queues, Event Flags, Timers, Semaphores, Mutexes, Block Pools, and Byte Pools
• Flexible memory usage
• Timeout available on all thread suspension
• Advanced preemption-threshold technique
• Low-overhead Application Timers
• Size scales automatically
• Picokernel architecture for size and speed

Improve Your H8/300H Development

Let our extensive experience with the H8/300H family of microprocessors help your product development. ThreadX, our high-performance real-time kernel, helps improve your product's quality and its time-to-market. In addition, using ThreadX makes it easier to enhance your product in the future.

H8/300H Optimizations

ThreadX optimizes context switching on the H8/300H. When context switching occurs inside of a ThreadX service call, only the registers preserved across function calls are saved as part of the thread's context, i.e. registers ER2-ER6.

A similar technique is used in interrupt handling. On the front end of interrupt service routines, only the compiler's scratch registers are saved initially (registers ER0-ER1). The full register set is saved only if thread preemption is required.