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#include "gpio.hpp" | |
#include "stm32f3xx.h" | |
#include <type_traits> | |
template <typename T> | |
constexpr auto cast_base(T &&enumstruct) { | |
using T_noref = std::remove_reference_t<T>; | |
return static_cast<std::underlying_type_t<T_noref>>(enumstruct); | |
} | |
uint8_t Gpio::instancesNum = 0; | |
Gpio::Gpio() { | |
} | |
Gpio::Gpio(GPIO_TypeDef *gpio, PinName pin, GpioConfig pc) | |
: Instance(gpio), pin(pin), config(pc) | |
{ | |
if( ++Gpio::instancesNum == 1 ) { | |
Gpio::allGpioInit(); | |
} | |
this->configure(gpio, pin, pc); | |
} | |
Gpio::Gpio(GPIO_TypeDef *gpio, PinName pin, GpioConfig::PinMode mode) | |
: Instance(gpio), pin(pin) | |
{ | |
if( ++Gpio::instancesNum == 1 ) { | |
Gpio::allGpioInit(); | |
} | |
this->configure(gpio, pin, mode); | |
} | |
void Gpio::configure(GPIO_TypeDef *gpio, PinName pin, GpioConfig pc) { | |
this->Instance = gpio; | |
this->pin = pin; | |
this->config = pc; | |
this->Instance->MODER &= ~(GPIO_MODER_MODER0 << (2*pin)); | |
this->Instance->MODER |= (cast_base(pc.mode) << (2*pin)); | |
this->Instance->OTYPER &= ~(GPIO_OTYPER_OT_0 << pin); | |
this->Instance->OTYPER |= (cast_base(pc.outputtype) << pin); | |
this->Instance->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (2*pin)); | |
this->Instance->OSPEEDR |= (cast_base(pc.speed) << (2*pin)); | |
this->Instance->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << (2*pin)); | |
this->Instance->PUPDR |= (cast_base(pc.pull) << (2*pin)); | |
if( this->config.mode == GpioConfig::PinMode::ALTERNATE ) { | |
if( this->pin <= 7 ) { | |
this->Instance->AFR[0] &= ~(GPIO_AFRL_AFRL0_Msk << (pin * 4)); | |
this->Instance->AFR[0] |= (this->config.alternateFunc << (pin * 4)); | |
}else{ | |
this->Instance->AFR[1] &= ~(GPIO_AFRH_AFRH0_Msk << ((pin - 8) * 4)); | |
this->Instance->AFR[1] |= (this->config.alternateFunc << ((pin - 8) * 4)); | |
} | |
} | |
} | |
void Gpio::configure(GPIO_TypeDef *gpio, PinName pin, GpioConfig::PinMode mode) { | |
this->Instance = gpio; | |
this->pin = pin; | |
this->config.mode = mode; | |
this->Instance->MODER &= ~(GPIO_MODER_MODER0 << (2*pin)); | |
this->Instance->MODER |= (cast_base(mode) << (2*pin)); | |
} | |
void Gpio::setMode(GpioConfig::PinMode mode) { | |
this->Instance->MODER &= ~(GPIO_MODER_MODER0 << (2*pin)); | |
this->Instance->MODER |= (cast_base(mode) << (2*pin)); | |
this->mode = mode; | |
} | |
void Gpio::allGpioInit() { | |
RCC->AHBENR |= RCC_AHBENR_GPIOAEN; | |
RCC->AHBENR |= RCC_AHBENR_GPIOBEN; | |
RCC->AHBENR |= RCC_AHBENR_GPIOCEN; | |
RCC->AHBENR |= RCC_AHBENR_GPIODEN; | |
RCC->AHBENR |= RCC_AHBENR_GPIOEEN; | |
RCC->AHBENR |= RCC_AHBENR_GPIOFEN; | |
// ** DO NOT SET THE REGISTERS BELOW ** | |
// If GPIOA->MODER is set to 0, it causes errors on SWD debugging. | |
// GPIOA->MODER = 0; | |
// GPIOB->MODER = 0; | |
// GPIOC->MODER = 0; | |
// GPIOD->MODER = 0; | |
// GPIOF->MODER = 0; | |
} | |
bool Gpio::getValue() { | |
if( this->config.mode == GpioConfig::PinMode::INPUT ) { | |
return (this->Instance->IDR >> this->pin) & 0x01; | |
} | |
//else | |
return (this->Instance->ODR >> this->pin) & 0x01; | |
} | |
uint8_t Gpio::operator =(bool val) { | |
if( val == true ) { | |
return (this->Instance->ODR |= (1 << this->pin)); | |
}else{ | |
return (this->Instance->ODR &= ~(1 << this->pin)); | |
} | |
} | |
uint8_t Gpio::operator ^(bool val) { | |
return this->getValue() ^ val; | |
} | |
uint8_t Gpio::operator^=(bool val) { | |
if( this->config.mode != GpioConfig::PinMode::GPIO_OUTPUT ) { | |
return *this = *this ^ val; | |
} | |
//else | |
return 0; | |
} |
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