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Chapter 11
Constant
USBD_PHDC_OS_CFG_SCHED_EN
Description
If using μC/OS-II or μC/OS-III RTOS port, enable or disable the
scheduler feature. You should set it to DEF_DISABLED if device only use
one QoS level to send data, for instance. (See section 11-4 “RTOS
QoS-based scheduler” on page 196)
WARNING: If you set this constant to DEF_ENABLED , you MUST ensure
11
that the scheduler’s task has a lower priority (i.e. higher priority value)
than any task that can write PHDC data.
Table 11-4 Configuration Constants Summary
If you set USBD_PHDC_OS_CFG_SCHED_EN to DEF_ENABLED and you use a μC/OS-II or
μC/OS-III RTOS port, PHDC will need an internal task for the scheduling operations. There
are two application specific configurations that must be set in this case. They should be
defined in the app_cfg.h file. Table 11-5 describes these configurations.
Constant
USBD_PHDC_OS_CFG_SCHED_TASK_PRIO
USBD_PHDC_OS_CFG_SCHED_TASK_STK_SIZE
Description
QoS based scheduler’s task priority.
WARNING: You must ensure that the scheduler’s task has a lower
priority (i.e. higher priority value) than any task writing PHDC data.
QoS based scheduler’s task stack size. Default value is 512.
Table 11-5 Application-Specific Configuration Constants
188
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