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Set up GPIO infrastructure

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This commit is contained in:
Luca Lizaranzu
2025-09-01 01:55:18 -07:00
parent 33fc098dfc
commit 0418e3d5c5
5 changed files with 202 additions and 18 deletions
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126
SHAL/Include/Peripheral/GPIO/Reg/SHAL_GPIO_REG_F072xB.h
View File

@@ -10,11 +10,15 @@
#include "SHAL_CORE.h"
#define AVAILABLE_PORTS 3
#define PINS_PER_PORT 16
#define AVAILABLE_GPIO \
X(A0) X(A1) X(A2) X(A3) X(A4) X(A5) X(A6) X(A7) X(A8) X(A9) X(A10) X(A11) X(A12) X(A13) X(A14) X(A15) \
X(B0) X(B1) X(B2) X(B3) X(B4) X(B5) X(B6) X(B7) X(B8) X(B9) X(B10) X(B11) X(B12) X(B13) X(B14) X(B15) \
X(C0) X(C1) X(C2) X(C3) X(C4) X(C5) X(C6) X(C7) X(C8) X(C9) X(C10) X(C11) X(C12) X(C13) X(C14) X(C15)
//Build enum map of available GPIO pins
enum class GPIO_Key {
#define X(key) key,
@@ -83,4 +87,126 @@ constexpr SHAL_Peripheral getGPIORegister(const GPIO_Key g){
__builtin_unreachable();
}
constexpr SHAL_Peripheral_Register getGPIORCCEnable(const GPIO_Key g){
switch(g) {
case GPIO_Key::A0:
case GPIO_Key::A1:
case GPIO_Key::A2:
case GPIO_Key::A3:
case GPIO_Key::A4:
case GPIO_Key::A5:
case GPIO_Key::A6:
case GPIO_Key::A7:
case GPIO_Key::A8:
case GPIO_Key::A9:
case GPIO_Key::A10:
case GPIO_Key::A11:
case GPIO_Key::A12:
case GPIO_Key::A13:
case GPIO_Key::A14:
case GPIO_Key::A15:
return {&RCC->AHBENR, RCC_AHBENR_GPIOAEN_Pos};
case GPIO_Key::B0:
case GPIO_Key::B1:
case GPIO_Key::B2:
case GPIO_Key::B3:
case GPIO_Key::B4:
case GPIO_Key::B5:
case GPIO_Key::B6:
case GPIO_Key::B7:
case GPIO_Key::B8:
case GPIO_Key::B9:
case GPIO_Key::B10:
case GPIO_Key::B11:
case GPIO_Key::B12:
case GPIO_Key::B13:
case GPIO_Key::B14:
case GPIO_Key::B15:
return {&RCC->AHBENR, RCC_AHBENR_GPIOBEN_Pos};
case GPIO_Key::C0:
case GPIO_Key::C1:
case GPIO_Key::C2:
case GPIO_Key::C3:
case GPIO_Key::C4:
case GPIO_Key::C5:
case GPIO_Key::C6:
case GPIO_Key::C7:
case GPIO_Key::C8:
case GPIO_Key::C9:
case GPIO_Key::C10:
case GPIO_Key::C11:
case GPIO_Key::C12:
case GPIO_Key::C13:
case GPIO_Key::C14:
case GPIO_Key::C15:
return {&RCC->AHBENR, RCC_AHBENR_GPIOCEN_Pos};
case GPIO_Key::INVALID:
case GPIO_Key::NUM_GPIO:
assert(false);
return SHAL_Peripheral_Register(nullptr,0); //Unreachable
}
__builtin_unreachable();
}
constexpr unsigned int getGPIOPortNumber(const GPIO_Key g){
switch(g) {
case GPIO_Key::A0:
case GPIO_Key::A1:
case GPIO_Key::A2:
case GPIO_Key::A3:
case GPIO_Key::A4:
case GPIO_Key::A5:
case GPIO_Key::A6:
case GPIO_Key::A7:
case GPIO_Key::A8:
case GPIO_Key::A9:
case GPIO_Key::A10:
case GPIO_Key::A11:
case GPIO_Key::A12:
case GPIO_Key::A13:
case GPIO_Key::A14:
case GPIO_Key::A15:
return 0;
case GPIO_Key::B0:
case GPIO_Key::B1:
case GPIO_Key::B2:
case GPIO_Key::B3:
case GPIO_Key::B4:
case GPIO_Key::B5:
case GPIO_Key::B6:
case GPIO_Key::B7:
case GPIO_Key::B8:
case GPIO_Key::B9:
case GPIO_Key::B10:
case GPIO_Key::B11:
case GPIO_Key::B12:
case GPIO_Key::B13:
case GPIO_Key::B14:
case GPIO_Key::B15:
return 1;
case GPIO_Key::C0:
case GPIO_Key::C1:
case GPIO_Key::C2:
case GPIO_Key::C3:
case GPIO_Key::C4:
case GPIO_Key::C5:
case GPIO_Key::C6:
case GPIO_Key::C7:
case GPIO_Key::C8:
case GPIO_Key::C9:
case GPIO_Key::C10:
case GPIO_Key::C11:
case GPIO_Key::C12:
case GPIO_Key::C13:
case GPIO_Key::C14:
case GPIO_Key::C15:
return 2;
case GPIO_Key::INVALID:
case GPIO_Key::NUM_GPIO:
assert(false);
return 0;
}
__builtin_unreachable();
}
#endif //SHMINGO_HAL_SHAL_GPIO_REG_F072XB_H

52
SHAL/Include/Peripheral/GPIO/SHAL_GPIO.h
View File

@@ -11,17 +11,28 @@
#include "SHAL_GPIO_REG_F072xB.h"
enum class PinMode {
INPUT_MODE = 0b00,
OUTPUT_MODE = 0b01,
ALTERNATE_FUNCTION_MODE = 0b10,
ANALOG_MODE = 0b11
INPUT_MODE,
OUTPUT_MODE,
ALTERNATE_FUNCTION_MODE,
ANALOG_MODE,
INVALID
};
enum class PinValue {
HI = 1,
LOW = 0,
};
unsigned long getPinMode(PinMode mode){
switch(mode){
case PinMode::INPUT_MODE:
return 0b00;
case PinMode::OUTPUT_MODE:
return 0b01;
case PinMode::ALTERNATE_FUNCTION_MODE:
return 0b10;
case PinMode::ANALOG_MODE:
return 0b11;
}
}
//Abstraction of GPIO registers
class GPIO{
public:
@@ -36,10 +47,31 @@ private:
friend class GPIOManager;
explicit GPIO(GPIO_Key key);
explicit GPIO(GPIO_Key key, PinMode pinMode);
GPIO();
GPIO_Key GPIO_KEY;
GPIO_Key m_GPIO_KEY = GPIO_Key::INVALID;
PinMode m_pinMode = PinMode::INVALID;
GPIO_TypeDef* p_GPIORegister = nullptr;
unsigned long m_offset = 0;
};
#define initGPIO(GPIO_KEY, PIN_MODE) GPIOManager::get(GPIO_KEY, PIN_MODE)
//Manages instances of GPIO objects
class GPIOManager{
public:
static GPIO& get(GPIO_Key, PinMode pinMode);
GPIOManager() = delete;
private:
inline static GPIO m_gpios[AVAILABLE_PORTS][PINS_PER_PORT] = {};
};
#endif //SHMINGO_HAL_SHAL_GPIO_H

3
SHAL/Include/Peripheral/Timer/SHAL_TIM.h
View File

@@ -47,7 +47,8 @@ private:
};
#define getTimer(timer_key) TimerManager::get(timer_key);
#define getTimer(timer_key) TimerManager::get(timer_key)
//Manages all timers so user does not have to personally initialize
class TimerManager{

2
SHAL/Include/SHAL.h
View File

@@ -9,6 +9,6 @@
#define SHAL_H
#include "SHAL_TIM.h"
#include "SHAL_GPIO.h"
#endif

35
SHAL/Src/Peripheral/GPIO/SHAL_GPIO.cpp
View File

@@ -5,21 +5,46 @@
#include "SHAL_GPIO.h"
GPIO::GPIO(){
//Do not initialize anything
}
GPIO::GPIO(GPIO_Key key) {
GPIO::GPIO(GPIO_Key key, PinMode pinMode) : m_GPIO_KEY(key),
p_GPIORegister(static_cast<GPIO_TypeDef*>(getGPIORegister(key).registers)),
m_offset(getGPIORegister(key).global_offset){
volatile unsigned long* gpioEnable = getGPIORCCEnable(key).reg;
unsigned long gpioOffset = getGPIORCCEnable(key).offset;
*gpioEnable |= (1 << gpioOffset);
p_GPIORegister->MODER |= (getPinMode(pinMode) << (2 * m_offset));
}
void GPIO::setLow() {
getGPIORegister(GPIO_KEY)->ODR &= ~(1 << getGPIOAPB(GPIO_KEY).offset);
p_GPIORegister->ODR &= ~(1 << m_offset);
}
void GPIO::setHigh() {
getGPIORegister(GPIO_KEY)->ODR |= (1 << getGPIOAPB(GPIO_KEY).offset);
p_GPIORegister->ODR |= (1 << m_offset);
}
void GPIO::toggle() {
p_GPIORegister->ODR ^= (1 << m_offset);
}
GPIO &GPIOManager::get(GPIO_Key key, PinMode pinMode) {
unsigned int gpioPort = getGPIOPortNumber(key);
unsigned long gpioPin = getGPIORegister(key).global_offset; //Use existing structs to get offset
GPIO curr = m_gpios[gpioPort][gpioPin];
if(curr.m_GPIO_KEY == GPIO_Key::INVALID || curr.m_pinMode != pinMode){
m_gpios[gpioPort][gpioPin] = GPIO(key,pinMode);
}
return m_gpios[gpioPort][gpioPin];
}