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This patch introduces the initial support for stdio library in Galileo platform. For now, only standard output and error are supported. Both streams use the UART1 device. Newlib doesn't call open() for stdin, stdout, and stderr which means that the _write_r call is the first activity the stub will see on those streams. For that reason, we initialize the UART1 device in Galileo's platform main() function instead of in open() system call.
The Contiki Operating System
Contiki is an open source operating system that runs on tiny low-power microcontrollers and makes it possible to develop applications that make efficient use of the hardware while providing standardized low-power wireless communication for a range of hardware platforms.
Contiki is used in numerous commercial and non-commercial systems, such as city sound monitoring, street lights, networked electrical power meters, industrial monitoring, radiation monitoring, construction site monitoring, alarm systems, remote house monitoring, and so on.
For more information, see the Contiki website: