78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
#include <cassert>
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#include "platform/nrf52/InterruptHandler.h"
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#include "platform/nrf52/InterruptGuardian.h"
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#include "platform/nrf52/gpiote.h"
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extern "C" {
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#include "nrf52.h"
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#include "nrf52_bitfields.h"
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NRF_GPIOTE_Type *const GPIOTE_REGS = reinterpret_cast<NRF_GPIOTE_Type *>(NRF_GPIOTE_BASE);
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}
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using namespace pinetime::platform::nrf52;
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Gpiote::Gpiote()
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: InterruptHandler(InterruptGuardian::Nrf52IrqN::GPIOTE_IRQ)
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, num_registered(0)
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{
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for(auto it = this->gpiote_channels.begin(); it != this->gpiote_channels.end(); ++it) {
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*it = nullptr;
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}
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}
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void Gpiote::enable()
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{
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NVIC_SetPriority(GPIOTE_IRQn, 7);
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NVIC_EnableIRQ(GPIOTE_IRQn);
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}
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void Gpiote::disable()
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{
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NVIC_DisableIRQ(GPIOTE_IRQn);
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}
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void Gpiote::register_handler(pinetime::interfaces::GpioInterface *gpio)
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{
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if(num_registered == GPIOTE_CHANNELS) {
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//FIXME: Error notification
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return;
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}
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if(num_registered == 0) {
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this->enable();
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} else {
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//check if gpio already registered
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for(auto it = this->gpiote_channels.begin(); it != this->gpiote_channels.end(); ++it) {
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if(*it == gpio) {
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return;
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}
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}
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}
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uint32_t i = 0;
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for(auto it = this->gpiote_channels.begin(); it != this->gpiote_channels.end(); ++it) {
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if(*it == nullptr) {
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*it = gpio;
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GPIOTE_REGS->INTENSET = GPIOTE_INTENSET_IN0_Msk;
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GPIOTE_REGS->CONFIG[i] = (GPIOTE_CONFIG_POLARITY_Toggle << GPIOTE_CONFIG_POLARITY_Pos)
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| ((gpio->pin_number()) << GPIOTE_CONFIG_PSEL_Pos)
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| (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos);
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}
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i++;
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}
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}
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void Gpiote::handle()
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{
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for(uint32_t i = 0; i < GPIOTE_CHANNELS; ++i) {
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if(GPIOTE_REGS->EVENTS_IN[i] != 0) {
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GPIOTE_REGS->EVENTS_IN[i] = 0;
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pinetime::interfaces::GpioInterface *h = this->gpiote_channels[i];
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assert(h != nullptr);
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h->handle();
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}
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}
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}
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