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Instant-On Technology for In-Car Telematics and Infotainment Systems

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Instant-On Technology for In-Car Telematics and Infotainment Systems
February 09, 2005
Mini-drivers are based on a simple concept: to make a peripheral device usable throughout the booting process.

  File Information  
Size:303.63 KB
Check Sum: 2276629250 310914
MD5 Sum:38e24d0f7f4b852c5948c84741e456a6
  Additional Notes  
To handle complex in-car telematics and infotainment systems, designers are turning to full-featured, protected-mode RTOSs. Despite their sophistication, these systems must satisfy the same timing requirements as older hardware-software solutions. Thanks to "mini-driver technology," small, highly efficient device drivers start executing before the OS kernel is initialized. Defined in the system's boot loader, a mini-driver can respond to a power-up message in a quick, timely fashion and ensure no other messages are lost while the OS boots up. Once the OS has booted, the mini-driver may continue running or it may pass control to a full-featured driver, which can then access any message the mini-driver has buffered.