115 lines
3.6 KiB
C++
115 lines
3.6 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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#include "SHAL_EXTI_CALLBACK.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() : m_GPIO_KEY(GPIO_Key::INVALID){
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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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SHAL_Peripheral gpioPeripheral = getGPIORegister(key);
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auto gpioRegister = static_cast<GPIO_TypeDef*>(gpioPeripheral.registers);
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unsigned long registerOffset = gpioPeripheral.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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gpioRegister->MODER &= ~(0b11 << (2 * registerOffset)); //Clear any previous mode
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gpioRegister->MODER |= (getPinMode(pinMode) << (2 * registerOffset)); //Set mode based on pinmode bit structure
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}
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void GPIO::setLow() {
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auto gpioPeripheral = getGPIORegister(m_GPIO_KEY);
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static_cast<GPIO_TypeDef*>(gpioPeripheral.registers)->ODR &= ~(1 << gpioPeripheral.global_offset);
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}
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void GPIO::setHigh() {
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auto gpioPeripheral = getGPIORegister(m_GPIO_KEY);
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static_cast<GPIO_TypeDef*>(gpioPeripheral.registers)->ODR |= (1 << gpioPeripheral.global_offset);
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}
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void GPIO::toggle() {
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auto gpioPeripheral = getGPIORegister(m_GPIO_KEY);
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static_cast<GPIO_TypeDef*>(gpioPeripheral.registers)->ODR ^= (1 << gpioPeripheral.global_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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if (m_gpios[gpioPort][gpioPin].m_GPIO_KEY == GPIO_Key::INVALID){
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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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void GPIOManager::getInterruptGPIO(GPIO_Key key, TriggerMode triggerMode, EXTICallback callback) {
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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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if (m_gpios[gpioPort][gpioPin].m_GPIO_KEY == GPIO_Key::INVALID){
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m_gpios[gpioPort][gpioPin] = GPIO(key,PinMode::INPUT_MODE); //Hardcode input mode for interrupt
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}
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RCC->APB2ENR |= RCC_APB2ENR_SYSCFGCOMPEN; //Enable EXT, TODO check if this is different across STM32 models
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NVIC_EnableIRQ(getGPIOEXTICR(key).IRQN); //Enable IRQN for pin
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EXTI->IMR |= (1 << gpioPin); //Enable correct EXTI line
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SHAL_EXTIO_Register EXTILineEnable = getGPIOEXTICR(key);
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*EXTILineEnable.EXT_ICR |= EXTILineEnable.mask; //Set bits to enable correct port on correct line TODO Find way to clear bits before
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uint32_t rising_mask = 0x00;
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uint32_t falling_mask = 0x00;
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//Set rising and falling edge triggers based on pin offset (enabled EXTI line)
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switch(triggerMode){
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case TriggerMode::RISING_EDGE:
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rising_mask = 1 << gpioPin;
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break;
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case TriggerMode::FALLING_EDGE:
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falling_mask = 1 << gpioPin;
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break;
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case TriggerMode::RISING_FALLING_EDGE:
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falling_mask = 1 << gpioPin;
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falling_mask = 1 << gpioPin;
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}
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//Set triggers
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EXTI->RTSR |= rising_mask;
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EXTI->FTSR |= falling_mask;
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//Set callback
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registerEXTICallback(key,callback);
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} |