interfaces/interrupt_interface.h

@@ -0,0 +1,16 @@
+#ifndef __INTERFACES_INTERRUPT_INTERFACE_H__
+#define __INTERFACES_INTERRUPT_INTERFACE_H__
+
+namespace pinetime::interfaces {
+
+class InterruptInterface
+{
+    public:
+        virtual void handle() = 0;
+        virtual void enable() = 0;
+        virtual void disable() = 0;
+};
+
+}
+
+#endif

src/platform/nrf52/InterruptGuardian.cc

@@ -0,0 +1,13 @@
+#include "platform/nrf52/InterruptHandler.h"
+#include "platform/nrf52/InterruptGuardian.h"
+
+using namespace pinetime::platform::nrf52;
+
+InterruptGuardian::InterruptGuardian()
+{
+}
+
+void InterruptGuardian::register_handler(Nrf52IrqN irq_nr, InterruptHandler &handler)
+{
+    this->nrf52_vector[irq_nr] = &handler;
+}

src/platform/nrf52/InterruptGuardian.h

@@ -0,0 +1,82 @@
+#ifndef __PINETIME_PLATFORM_NRF52_INTERRUPTGUARDIAN_H__
+#define __PINETIME_PLATFORM_NRF52_INTERRUPTGUARDIAN_H__
+
+#include <array>
+
+extern "C" {
+    #include "nrf52.h"
+}
+
+namespace pinetime::platform::nrf52 {
+
+class InterruptGuardian
+{
+public:
+    InterruptGuardian();
+
+    enum Nrf52IrqN {
+        // CM4 interrupts
+        RESET_IRQ = 0,           //!< -15  Reset Vector, invoked on Power up and warm reset
+        NON_MASKABLE_INT_IRQ,    //!< -14  Non maskable Interrupt, cannot be stopped or preempted
+        HARD_FAULT_IRQ,          //!< -13  Hard Fault, all classes of Fault
+        MEMORY_MANAGEMENT_IRQ,   //!< -12  Memory Management, MPU mismatch, including Access Violation and No Match
+        BUS_FAULT_IRQ,           //!< -11  Bus Fault, Pre-Fetch-, Memory Access Fault, other address/memory related Fault
+        USAGE_FAULT_IRQ,         //!< -10  Usage Fault, i.e. Undef Instruction, Illegal State Transition
+        SV_CALL_IRQ,             //!< -5 System Service Call via SVC instruction
+        DEBUG_MONITOR_IRQ,       //!< -4 Debug Monitor
+        PEND_SV_IRQ,             //!< -2 Pendable request for system service
+        SYS_TICK_IRQ,            //!< -1 System Tick Timer
+
+        // nrf52 interrupts
+        POWER_CLOCK_IRQn,                       //!< 0 POWER_CLOCK
+        RADIO_IRQn,                             //!< 1 RADIO
+        UARTE0_UART0_IRQn,                      //!< 2 UARTE0_UART0
+        SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQn, //!< 3 SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0
+        SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQn, //!< 4 SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1
+        NFCT_IRQn,                              //!< 5 NFCT
+        GPIOTE_IRQn,                            //!< 6  GPIOTE
+        SAADC_IRQn,                             //!< 7  SAADC
+        TIMER0_IRQn,                            //!< 8  TIMER0
+        TIMER1_IRQn,                            //!< 9  TIMER1
+        TIMER2_IRQn,                            //!< 10 TIMER2
+        RTC0_IRQn,                              //!< 11 RTC0
+        TEMP_IRQn,                              //!< 12 TEMP
+        RNG_IRQn,                               //!< 13 RNG
+        ECB_IRQn,                               //!< 14 ECB
+        CCM_AAR_IRQn,                           //!< 15 CCM_AAR
+        WDT_IRQn,                               //!< 16 WDT
+        RTC1_IRQn,                              //!< 17 RTC1
+        QDEC_IRQn,                              //!< 18 QDEC
+        COMP_LPCOMP_IRQn,                       //!< 19 COMP_LPCOMP
+        SWI0_EGU0_IRQn,                         //!< 20 SWI0_EGU0
+        SWI1_EGU1_IRQn,                         //!< 21 SWI1_EGU1
+        SWI2_EGU2_IRQn,                         //!< 22 SWI2_EGU2
+        SWI3_EGU3_IRQn,                         //!< 23 SWI3_EGU3
+        SWI4_EGU4_IRQn,                         //!< 24 SWI4_EGU4
+        SWI5_EGU5_IRQn,                         //!< 25 SWI5_EGU5
+        TIMER3_IRQn,                            //!< 26 TIMER3
+        TIMER4_IRQn,                            //!< 27 TIMER4
+        PWM0_IRQn,                              //!< 28 PWM0
+        PDM_IRQn,                               //!< 29 PDM
+        MWU_IRQn,                               //!< 32 MWU
+        PWM1_IRQn,                              //!< 33 PWM1
+        PWM2_IRQn,                              //!< 34 PWM2
+        SPIM2_SPIS2_SPI2_IRQn,                  //!< 35 SPIM2_SPIS2_SPI2
+        RTC2_IRQn,                              //!< 36 RTC2
+        I2S_IRQn,                               //!< 37 I2S
+        FPU_IRQn                                //!< 38 FPU
+    };
+    enum {
+        NRF52_HANDLER_COUNT = FPU_IRQn + 1,
+    };
+
+    void register_handler(Nrf52IrqN irq_nr, InterruptHandler &);
+
+    static InterruptGuardian instance;
+
+    std::array<InterruptHandler *, NRF52_HANDLER_COUNT> nrf52_vector;
+};
+
+}
+
+#endif

src/platform/nrf52/InterruptHandler.cc

@@ -0,0 +1,27 @@
+#include <assert.h>
+
+#include "platform/nrf52/InterruptHandler.h"
+#include "platform/nrf52/InterruptGuardian.h"
+
+using namespace pinetime::platform::nrf52;
+
+InterruptHandler::InterruptHandler(uint32_t irq_nr)
+{
+    InterruptGuardian::instance.register_handler(static_cast<InterruptGuardian::Nrf52IrqN>(irq_nr), *this);
+}
+
+void InterruptHandler::handle()
+{
+    asm volatile("nop");
+    assert(false);
+}
+
+void InterruptHandler::enable()
+{
+    assert(false);
+}
+
+void InterruptHandler::disable()
+{
+    assert(false);
+}

src/platform/nrf52/InterruptHandler.h

@@ -0,0 +1,22 @@
+#ifndef __PINETIME_PLATFORM_NRF52_INTERRUPTHANDLER_H__
+#define __PINETIME_PLATFORM_NRF52_INTERRUPTHANDLER_H__
+
+#include <cstdint>
+
+#include "interrupt_interface.h"
+
+namespace pinetime::platform::nrf52 {
+
+class InterruptHandler : public pinetime::interfaces::InterruptInterface
+{
+    public:
+        InterruptHandler(uint32_t);
+
+        void handle() override;
+        void enable() override;
+        void disable() override;
+};
+
+}
+
+#endif

src/platform/nrf52/low_level_interrupt.cc

@@ -0,0 +1,66 @@
+#include <cassert>
+
+#include "platform/nrf52/InterruptHandler.h"
+#include "platform/nrf52/InterruptGuardian.h"
+
+extern "C" {
+    void NMI_Handler(void);
+    void HardFault_Handler(void);
+    void MemoryManagement_Handler(void);
+    void BusFault_Handler(void);
+    void UsageFault_Handler(void);
+    void SVC_Handler(void);
+    void DebugMon_Handler(void);
+    void PendSV_Handler(void);
+    void SysTick_Handler(void);
+
+    void POWER_CLOCK_IRQHandler(void);
+    void RADIO_IRQHandler(void);
+    void UARTE0_UART0_IRQHandler(void);
+    void SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler(void);
+    void SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQHandler(void);
+    void NFCT_IRQHandler(void);
+    void GPIOTE_IRQHandler(void);
+    void SAADC_IRQHandler(void);
+    void TIMER0_IRQHandler(void);
+    void TIMER1_IRQHandler(void);
+    void TIMER2_IRQHandler(void);
+    void RTC0_IRQHandler(void);
+    void TEMP_IRQHandler(void);
+    void RNG_IRQHandler(void);
+    void ECB_IRQHandler(void);
+    void CCM_AAR_IRQHandler(void);
+    void WDT_IRQHandler(void);
+    void RTC1_IRQHandler(void);
+    void QDEC_IRQHandler(void);
+    void COMP_LPCOMP_IRQHandler(void);
+    void SWI0_EGU0_IRQHandler(void);
+    void SWI1_EGU1_IRQHandler(void);
+    void SWI2_EGU2_IRQHandler(void);
+    void SWI3_EGU3_IRQHandler(void);
+    void SWI4_EGU4_IRQHandler(void);
+    void SWI5_EGU5_IRQHandler(void);
+    void TIMER3_IRQHandler(void);
+    void TIMER4_IRQHandler(void);
+    void PWM0_IRQHandler(void);
+    void PDM_IRQHandler(void);
+    void MWU_IRQHandler(void);
+    void PWM1_IRQHandler(void);
+    void PWM2_IRQHandler(void);
+    void SPIM2_SPIS2_SPI2_IRQHandler(void);
+    void RTC2_IRQHandler(void);
+    void I2S_IRQHandler(void);
+    void FPU_IRQHandler(void);
+}
+
+using namespace pinetime::platform::nrf52;
+
+void SysTick_Handler(void)
+{
+    uint32_t irq_nr = InterruptGuardian::Nrf52IrqN::SYS_TICK_IRQ;
+    InterruptHandler *h = InterruptGuardian::instance.nrf52_vector[irq_nr];
+
+    assert(h != nullptr);
+
+    h->handle();
+}