All device specific interrupts should have a default interrupt handler function that can be overwritten in user code. Definition of IRQn numbers. Virtualization of interrupt vector table access functions. These interrupt handlers can be used directly in application software without being adapted by the programmer. When you choose to create a CMSIS-based project, the wizard will make a number of modifications to all build configurations of the project that it creates:
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This function allows to read the address of an interrupt handler function.
The function sets the priority grouping PriorityGroup using the required unlock sequence. The user application may simply define an interrupt handler function by using the handler name as shown below. Each interrupt handler is defined as a weak function to an dummy handler.
Dynamic switching of interrupt priority levels is not supported. Set a device specific interrupt to pending. The appropriate CMSIS library project must exist in the workspace your new project is being created in. When an ISR is preempted and the processor executes anohter interrupt handler, the plc interrupt is still defined as active. Each Interrupt Priority Level Register is 1-byte wide. Sets the interrupt target field in the non-secure NVIC when in secure state.
The Vector Table defines the entry addresses of the processor exceptions and the device specific interrupts. Below is an example for this default handler function.
Clears the interrupt target field in the non-secure NVIC when in secure state. Get a device specific interrupt enable status. Plc to Programmers Model with TrustZone for more information.
At the beginning of the vector table, the initial stack value and the exception vectors of the processor are defined. By default, priority group setting is zero.
Clear Interrupt Target State. Reads the interrupt target field from the non-secure NVIC when in secure state.
These functions should be implemented in a separate source module. Only values from Secure Fault Interrupt [only on Armv8-M].
Cjsis returned priority value is automatically aligned to the implemented priority bits of the microcontroller. It also provides access to functionality contained within the Cortex-M processor core. Sets the priority for the interrupt specified by IRQn.
All device specific interrupts should have a default interrupt handler function that can be overwritten in user code. This is the highest possible priority. Refer to Using Interrupt Vector Remap for more information. IRQn cannot be a negative number. Set Interrupt Target State.
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This function removes the pending state of the specified device specific interrupt IRQn. This function encodes the priority for an interrupt with the priority group PriorityGrouppreemptive priority value PreemptPriorityand subpriority value SubPriority. Returns 0 if interrupt is assigned to Secure 1 if interrupt is assigned to Non Secure Remarks Only available for Armv8-M in secure state.
This function reads the priority for the specified interrupt IRQn. You can also download the latest versions of these library projects from: Priority-level registers are 2 bit wide, occupying the two MSBs.