68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
#include "platform/nrf52/gpio.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_GPIO_Type *const GPIO_REGS = reinterpret_cast<NRF_GPIO_Type *>(NRF_P0_BASE);
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}
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using namespace pinetime::platform::nrf52;
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Gpio::Gpio(uint32_t pin)
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: pin_number(pin)
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{
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this->set_direction(direction::OUT);
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this->clear();
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}
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void Gpio::set_direction(direction dir)
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{
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uint32_t direct = GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos;
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uint32_t input = GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos;
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uint32_t pull = GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos;
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uint32_t drive = GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos;
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uint32_t sense = GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos;
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if(dir == direction::IN) {
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direct = GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos;
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input = GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos;
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// FIXME: Make this configurable
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// GPIO_PIN_CNF_PULL_Disabled, ///< Pin pull-up resistor disabled.
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// GPIO_PIN_CNF_PULL_Pulldown, ///< Pin pull-down resistor enabled.
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// GPIO_PIN_CNF_PULL_Pullup, ///< Pin pull-up resistor enabled.
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pull = GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos;
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drive = GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos;
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sense = GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos;
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}
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GPIO_REGS->PIN_CNF[pin_number] = direct | input | pull | drive | sense;
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}
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void Gpio::set_pin_number(uint32_t pin)
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{
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this->pin_number = pin;
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}
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uint32_t Gpio::get()
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{
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uint32_t res = (GPIO_REGS->IN >> pin_number) & 1UL;
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return res;
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}
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void Gpio::set()
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{
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GPIO_REGS->OUTSET = 1UL << (this->pin_number);
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}
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void Gpio::clear()
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{
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GPIO_REGS->OUTCLR = 1UL << (this->pin_number);
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}
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void Gpio::toggle()
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{
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uint32_t state = GPIO_REGS->OUT;
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GPIO_REGS->OUTSET = (~state & (1UL << (this->pin_number)));
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GPIO_REGS->OUTCLR = (state & (1UL << (this->pin_number)));
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} |