Files
Shmingo-HAL/SHAL/Src/STM32L4XX/Peripheral/GPIO/SHAL_GPIO.cpp
2025-11-03 23:17:55 -08:00

123 lines
4.2 KiB
C++

//
// Created by Luca on 8/30/2025.
//
#include <cstdio>
#include "SHAL_GPIO.h"
#include "SHAL_EXTI_CALLBACK.h"
#include "SHAL_UART.h"
SHAL_GPIO::SHAL_GPIO() : m_GPIO_KEY(GPIO_Key::INVALID){
//Do not initialize anything
}
SHAL_GPIO::SHAL_GPIO(GPIO_Key key) : m_GPIO_KEY(key) {
volatile unsigned long* gpioEnable = getGPIORCCEnable(key).reg;
unsigned long gpioOffset = getGPIORCCEnable(key).offset;
*gpioEnable |= (1 << gpioOffset); //Set enable flag
}
void SHAL_GPIO::setLow() {
auto outputDataReg = getGPIOOutputDataRegister(m_GPIO_KEY);
SHAL_set_bits(outputDataReg.reg,1,0,outputDataReg.offset);
}
void SHAL_GPIO::setHigh() {
auto outputDataReg = getGPIOOutputDataRegister(m_GPIO_KEY);
SHAL_set_bits(outputDataReg.reg,1,1,outputDataReg.offset);
}
void SHAL_GPIO::toggle() volatile {
auto outputDataReg = getGPIOOutputDataRegister(m_GPIO_KEY);
SHAL_flip_bits(outputDataReg.reg,1,outputDataReg.offset);
}
void SHAL_GPIO::setOutputType(PinType type) volatile {
auto outputTypeReg = getGPIOOutputTypeRegister(m_GPIO_KEY);
SHAL_set_bits(outputTypeReg.reg,2,static_cast<uint8_t>(type),outputTypeReg.offset);
}
void SHAL_GPIO::setOutputSpeed(OutputSpeed speed) volatile {
auto outputSpeedReg = getGPIOOutputSpeedRegister(m_GPIO_KEY);
SHAL_set_bits(outputSpeedReg.reg,2,static_cast<uint8_t>(speed),outputSpeedReg.offset);
}
void SHAL_GPIO::setInternalResistor(InternalResistorType type) volatile {
auto pupdreg = getGPIOPUPDRegister(m_GPIO_KEY);
SHAL_set_bits(pupdreg.reg,2,static_cast<uint8_t>(type),pupdreg.offset);
}
void SHAL_GPIO::setAlternateFunction(GPIO_Alternate_Function AF) volatile {
auto alternateFunctionReg = getGPIOAlternateFunctionRegister(m_GPIO_KEY);
SHAL_set_bits(alternateFunctionReg.reg,4,static_cast<uint8_t>(AF),alternateFunctionReg.offset);
}
SHAL_Result SHAL_GPIO::setPinMode(PinMode mode) volatile {
auto pinModeReg = getGPIOModeRegister(m_GPIO_KEY);
if(mode == PinMode::ANALOG_MODE && getGPIOPortInfo(m_GPIO_KEY).ADCChannel == SHAL_ADC_Channel::NO_ADC_MAPPING){
char buff[100];
sprintf(buff, "Error: GPIO pin %d has no valid ADC mapping\r\n", static_cast<uint8_t>(m_GPIO_KEY));
SHAL_UART2.sendString(buff);
return SHAL_Result::ERROR;
}
SHAL_print_register(pinModeReg.reg);
SHAL_set_bits(pinModeReg.reg,2,static_cast<uint8_t>(mode),pinModeReg.offset); //Set mode
return SHAL_Result::OKAY;
}
void SHAL_GPIO::useAsExternalInterrupt(TriggerMode mode, EXTICallback callback) {
uint32_t gpioPin = getGPIOPinNumber(m_GPIO_KEY);
setPinMode(PinMode::INPUT_MODE); //Explicitly set mode to input
RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN; //Enable EXT, TODO Add this to a global SHAL_GLOBAL_TYPES.h file
NVIC_EnableIRQ(getGPIOEXTICR(m_GPIO_KEY).IRQN); //Enable IRQN for pin
auto ext_imr = getEXTIInterruptMaskRegister(gpioPin);
SHAL_set_bits(ext_imr.reg,1,1,gpioPin);
SHAL_GPIO_EXTI_Register EXTILineEnable = getGPIOEXTICR(m_GPIO_KEY);
*EXTILineEnable.EXT_ICR |= EXTILineEnable.mask; //Set bits to enable correct port on correct line TODO Find way to clear bits before
if(mode == TriggerMode::RISING_EDGE || mode == TriggerMode::RISING_FALLING_EDGE) {
auto rising_trigger_selection_reg = getEXTIRisingTriggerSelectionRegister(gpioPin);
SHAL_set_bits(rising_trigger_selection_reg.reg, 1, 1, gpioPin);
}
if(mode == TriggerMode::FALLING_EDGE || mode == TriggerMode::RISING_FALLING_EDGE) {
auto falling_trigger_selection_reg = getEXTIFallingTriggerSelectionRegister(gpioPin);
SHAL_set_bits(falling_trigger_selection_reg.reg,1,1,gpioPin);
}
//Set callback
registerEXTICallback(m_GPIO_KEY,callback);
__enable_irq(); //Enable IRQ just in case
}
uint16_t SHAL_GPIO::analogRead(SHAL_ADC_SampleTime sampleTime) {
SHAL_ADC_Channel channel = getGPIOPortInfo(m_GPIO_KEY).ADCChannel;
return GPIOManager::getGPIOADC().singleConvertSingle(channel,sampleTime);
}
SHAL_GPIO& GPIOManager::get(GPIO_Key key) {
unsigned int gpioPort = getGPIOPortNumber(key);
uint8_t gpioPin = getGPIOPinNumber(key);
if (m_gpios[gpioPort][gpioPin].m_GPIO_KEY == GPIO_Key::INVALID){
m_gpios[gpioPort][gpioPin] = SHAL_GPIO(key);
}
return m_gpios[gpioPort][gpioPin];
}