uC/OS-II Resources
This section refers to the following sample application(s):
00-uc_resources
As detailed in Resources section, the uC/OS-II library shipped with the
defines the number of resource available to your application. uC/OS-II will not allow your application to allocate more resources than are available. For example, the OSSemCreate(0) returns NULL when no more semaphores can be created because uC/OS-II ran out of Event Control Blocks (ECBs).
The 00-uc_resources Sample Application
The 00-uc_resources sample application allows you to "see" the number of free resources, both the number of ECBs, and the number of timers. This sample application creates a single task called resourceTask which prints the remaining number of ECBs as it does the following operations:
create a semaphore
delete a semaphore
open the SPI device
open the I2C device
open the 1-Wire device
join a network
create a notification channel for GPIO events
create a notification channel for UART events
Each of these operations causes the
to allocate/free some number of ECBs and timers. The 00-uc_resources CLI output allows you to follow the allocation of these resources.
After doing the operations listed above, the 00-uc_resources sample application periodically prints the remaining number of ECBs and timers. Note that these numbers are larger than the ones listed in the Resources section.
uc_resources app, ver 1.0.0.2
waiting for part of boot...
SmartMeshIP stack, ver 1.2.1.6
initially: 43 ECBs available
create semaphore: 42 ECBs available (-1)
delete semaphore: 43 ECBs available (1)
Open SPI: 42 ECBs available (-1)
Open I2C: 40 ECBs available (-2)
Open 1-Wire: 38 ECBs available (-2)
join network: 28 ECBs available (-10)
GPIO notif chan.: 25 ECBs available (-3)
UART notif chan.: 22 ECBs available (-3)
11052 : Joining
12176 : Connected
22 ECBs available (0)
12 timers available
18333 : Active
22 ECBs available (0)
11 timers available
22 ECBs available (0)
11 timers available