libopencm3 Cortex Nested Vectored Interrupt Controller More...
Functions | |
| void | nvic_enable_irq (uint8_t irqn) |
| NVIC Enable Interrupt. More... | |
| void | nvic_disable_irq (uint8_t irqn) |
| NVIC Disable Interrupt. More... | |
| uint8_t | nvic_get_pending_irq (uint8_t irqn) |
| NVIC Return Pending Interrupt. More... | |
| void | nvic_set_pending_irq (uint8_t irqn) |
| NVIC Set Pending Interrupt. More... | |
| void | nvic_clear_pending_irq (uint8_t irqn) |
| NVIC Clear Pending Interrupt. More... | |
| uint8_t | nvic_get_irq_enabled (uint8_t irqn) |
| NVIC Return Enabled Interrupt. More... | |
| void | nvic_set_priority (uint8_t irqn, uint8_t priority) |
| NVIC Set Interrupt Priority. More... | |
| uint8_t | nvic_get_active_irq (uint8_t irqn) |
| NVIC Return Active Interrupt. More... | |
| void | nvic_generate_software_interrupt (uint16_t irqn) |
| NVIC Software Trigger Interrupt. More... | |
Detailed Description
libopencm3 Cortex Nested Vectored Interrupt Controller
- Version
- 1.0.0
- Date
- 18 August 2012
Cortex processors provide 14 cortex-defined interrupts (NMI, usage faults, systicks etc.) and varying numbers of implementation defined interrupts (typically peripherial interrupts and DMA).
- See also
- Cortex-M3 Devices Generic User Guide
- STM32F10xxx Cortex-M3 programming manual
LGPL License Terms libopencm3 License
Function Documentation
◆ nvic_clear_pending_irq()
| void nvic_clear_pending_irq | ( | uint8_t | irqn | ) |
NVIC Clear Pending Interrupt.
Force remove a user interrupt from a pending state. This has no effect if the interrupt is actively being serviced.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
Definition at line 112 of file nvic.c.
References NVIC_ICPR.
◆ nvic_disable_irq()
| void nvic_disable_irq | ( | uint8_t | irqn | ) |
NVIC Disable Interrupt.
Disables a user interrupt.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
Definition at line 70 of file nvic.c.
References NVIC_ICER.
◆ nvic_enable_irq()
| void nvic_enable_irq | ( | uint8_t | irqn | ) |
NVIC Enable Interrupt.
Enables a user interrupt.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
Definition at line 57 of file nvic.c.
References NVIC_ISER.
◆ nvic_generate_software_interrupt()
| void nvic_generate_software_interrupt | ( | uint16_t | irqn | ) |
NVIC Software Trigger Interrupt.
Generate an interrupt from software. This has no effect for unprivileged access unless the privilege level has been elevated through the System Control Registers.
- Parameters
-
[in] irqn Unsigned int16. Interrupt number (0 ... 239)
Definition at line 209 of file nvic.c.
References NVIC_STIR.
◆ nvic_get_active_irq()
| uint8_t nvic_get_active_irq | ( | uint8_t | irqn | ) |
NVIC Return Active Interrupt.
Interrupt has occurred and is currently being serviced.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
- Returns
- Boolean. Interrupt active.
Definition at line 194 of file nvic.c.
References NVIC_IABR.
◆ nvic_get_irq_enabled()
| uint8_t nvic_get_irq_enabled | ( | uint8_t | irqn | ) |
NVIC Return Enabled Interrupt.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
- Returns
- Boolean. Interrupt enabled.
Definition at line 126 of file nvic.c.
References NVIC_ISER.
◆ nvic_get_pending_irq()
| uint8_t nvic_get_pending_irq | ( | uint8_t | irqn | ) |
NVIC Return Pending Interrupt.
True if the interrupt has occurred and is waiting for service.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
- Returns
- Boolean. Interrupt pending.
Definition at line 84 of file nvic.c.
References NVIC_ISPR.
◆ nvic_set_pending_irq()
| void nvic_set_pending_irq | ( | uint8_t | irqn | ) |
NVIC Set Pending Interrupt.
Force a user interrupt to a pending state. This has no effect if the interrupt is already pending.
- Parameters
-
[in] irqn Unsigned int8. Interrupt number User interrupts for STM32 L4 series
Definition at line 98 of file nvic.c.
References NVIC_ISPR.
◆ nvic_set_priority()
| void nvic_set_priority | ( | uint8_t | irqn, |
| uint8_t | priority | ||
| ) |
NVIC Set Interrupt Priority.
There are 16 priority levels only, given by the upper four bits of the priority byte, as required by ARM standards. The priority levels are interpreted according to the pre-emptive priority grouping set in the SCB Application Interrupt and Reset Control Register (SCB_AIRCR), as done in scb_set_priority_grouping,
- Parameters
-
[in] irqn Interrupt number User interrupts for STM32 L4 series [in] priority Interrupt priority (0 ... 255 in steps of 16)
Definition at line 152 of file nvic.c.
References NVIC_IPR, NVIC_IRQ_COUNT, and SCB_SHPR.
