73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
//
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// Created by Luca on 8/30/2025.
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//
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#include "SHAL_GPIO.h"
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unsigned long getPinMode(PinMode mode){
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switch(mode){
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case PinMode::INPUT_MODE:
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return 0b00;
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case PinMode::OUTPUT_MODE:
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return 0b01;
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case PinMode::ALTERNATE_FUNCTION_MODE:
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return 0b10;
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case PinMode::ANALOG_MODE:
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return 0b11;
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case PinMode::INVALID:
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assert(false);
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return 0;
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}
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__builtin_unreachable();
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}
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GPIO::GPIO(){
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//Do not initialize anything
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}
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GPIO::GPIO(GPIO_Key key, PinMode pinMode) : m_GPIO_KEY(key),
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p_GPIORegister(static_cast<GPIO_TypeDef*>(getGPIORegister(key).registers)),
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m_offset(getGPIORegister(key).global_offset){
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volatile unsigned long* gpioEnable = getGPIORCCEnable(key).reg;
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unsigned long gpioOffset = getGPIORCCEnable(key).offset;
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*gpioEnable |= (1 << gpioOffset); //Set enable flag
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p_GPIORegister->MODER &= ~(0b11 << (2 * m_offset)); //Clear any previous mode
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p_GPIORegister->MODER |= (getPinMode(pinMode) << (2 * m_offset)); //Set mode based on pinmode bit structure
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}
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void GPIO::setLow() {
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p_GPIORegister->ODR &= ~(1 << m_offset);
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}
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void GPIO::setHigh() {
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p_GPIORegister->ODR |= (1 << m_offset);
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}
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void GPIO::toggle() {
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p_GPIORegister->ODR ^= (1 << m_offset);
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}
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GPIO* GPIOManager::get(GPIO_Key key, PinMode pinMode) {
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unsigned int gpioPort = getGPIOPortNumber(key);
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unsigned long gpioPin = getGPIORegister(key).global_offset; //Use existing structs to get offset
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GPIO curr = *m_gpios[gpioPort][gpioPin];
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if(curr.m_GPIO_KEY == GPIO_Key::INVALID || curr.m_pinMode != pinMode){
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*m_gpios[gpioPort][gpioPin] = GPIO(key,pinMode);
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}
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return m_gpios[gpioPort][gpioPin];
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}
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