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#ifndef GPIO_H
#define GPIO_H
#include <stdint.h>
struct GPIO_reg_t {
#if defined(STM32F1)
volatile uint32_t CRL;
volatile uint32_t CRH;
volatile uint32_t IDR;
volatile uint32_t ODR;
volatile uint32_t BSRR;
volatile uint32_t BRR;
volatile uint32_t LCKR;
#elif defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
volatile uint32_t MODER;
volatile uint32_t OTYPER;
volatile uint32_t OSPEEDR;
volatile uint32_t PUPDR;
volatile uint32_t IDR;
volatile uint32_t ODR;
volatile uint32_t BSRR;
volatile uint32_t LCKR;
volatile uint32_t AFRL;
volatile uint32_t AFRH;
#endif
};
class GPIO_t {
public:
GPIO_reg_t& reg;
class Pin {
private:
const GPIO_t& g;
int n;
public:
constexpr Pin(const GPIO_t& gpio, int pin) : g(gpio), n(pin) {}
enum Mode {
#if defined(STM32F1)
Input = 0x4,
InputPull = 0x8,
Output = 0x3,
AF = 0xb,
Analog = 0x0,
#elif defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
Input,
Output,
AF,
Analog,
#endif
};
enum Type {
PushPull,
OpenDrain,
};
enum Pull {
PullNone,
PullUp,
PullDown,
};
enum Speed {
Low,
Medium,
Fast,
High,
};
void set_mode(Mode m) {
#if defined(STM32F1)
if(n < 8) {
g.reg.CRL = (g.reg.CRL & ~(0xf << (n * 4))) | m << (n * 4);
} else {
g.reg.CRH = (g.reg.CRH & ~(0xf << (n * 4 - 32))) | m << (n * 4 - 32);
}
#elif defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
g.reg.MODER = (g.reg.MODER & ~(3 << (n * 2))) | m << (n * 2);
#endif
}
void set_type(Type t) {
#if defined(STM32F1)
// TODO: Unified configure() method?
#elif defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
if(t) {
g.reg.OTYPER |= 1 << n;
} else {
g.reg.OTYPER &= ~(1 << n);
}
#endif
}
void set_pull(Pull p) {
#if defined(STM32F1)
// TODO: Unified configure() method?
#elif defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
g.reg.PUPDR = (g.reg.PUPDR & ~(3 << (n * 2))) | p << (n * 2);
#endif
}
void set_af(int af) {
#if defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
if(n < 8) {
g.reg.AFRL = (g.reg.AFRL & ~(0xf << (n * 4))) | af << (n * 4);
} else {
g.reg.AFRH = (g.reg.AFRH & ~(0xf << (n * 4 - 32))) | af << (n * 4 - 32);
}
#endif
}
void set_speed(Speed s) {
#if defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
g.reg.OSPEEDR = (g.reg.OSPEEDR & ~(3 << (n * 2))) | s << (n * 2);
#endif
}
void on() {
g.reg.BSRR = 1 << n;
}
void off() {
g.reg.BSRR = 1 << 16 << n;
}
void set(bool value) {
if(value) {
on();
} else {
off();
}
}
bool get() {
return g.reg.IDR & (1 << n);
}
void toggle() {
set(!(g.reg.ODR & (1 << n)));
}
};
class PinArray {
private:
const GPIO_t& g;
int f;
int l;
constexpr uint32_t mask1() {
return ((2 << l) - 1) ^ ((1 << f) - 1);
}
constexpr uint32_t mask2() {
return ((4 << (l * 2)) - 1) ^ ((1 << (f * 2)) - 1);
}
public:
constexpr PinArray(const GPIO_t& gpio, int first, int last) : g(gpio), f(first), l(last) {}
#if defined(STM32F3) || defined(STM32F4) || defined(STM32L0)
void set_mode(Pin::Mode m) {
g.reg.MODER = (g.reg.MODER & ~mask2()) | ((0x55555555 * m) & mask2());
}
void set_type(Pin::Type t) {
g.reg.OTYPER = (g.reg.OTYPER & ~mask2()) | ((0x55555555 * t) & mask2());
}
void set_pull(Pin::Pull p) {
g.reg.PUPDR = (g.reg.PUPDR & ~mask2()) | ((0x55555555 * p) & mask2());
}
#endif
void set(uint16_t value) {
value <<= f;
g.reg.BSRR = ((~value & mask1()) << 16) | (value & mask1());
}
uint16_t get() {
return g.reg.IDR & mask1();
}
};
constexpr GPIO_t(uint32_t reg_addr) : reg(*(GPIO_reg_t*)reg_addr) {}
constexpr Pin operator[](int pin) {
return Pin(*this, pin);
}
constexpr PinArray array(int first, int last) {
return PinArray(*this, first, last);
}
};
typedef GPIO_t::Pin Pin;
typedef GPIO_t::PinArray PinArray;
#if defined(STM32F1)
static GPIO_t GPIOA(0x40010800);
static GPIO_t GPIOB(0x40010c00);
static GPIO_t GPIOC(0x40011000);
static GPIO_t GPIOD(0x40011400);
static GPIO_t GPIOE(0x40011800);
#elif defined(STM32F3)
static GPIO_t GPIOA(0x48000000);
static GPIO_t GPIOB(0x48000400);
static GPIO_t GPIOC(0x48000800);
static GPIO_t GPIOD(0x48000c00);
static GPIO_t GPIOE(0x48001000);
static GPIO_t GPIOF(0x48001400);
#elif defined(STM32F4)
static GPIO_t GPIOA(0x40020000);
static GPIO_t GPIOB(0x40020400);
static GPIO_t GPIOC(0x40020800);
static GPIO_t GPIOD(0x40020c00);
static GPIO_t GPIOE(0x40021000);
static GPIO_t GPIOF(0x40021400);
static GPIO_t GPIOG(0x40021800);
static GPIO_t GPIOH(0x40021c00);
static GPIO_t GPIOI(0x40022000);
#elif defined(STM32L0)
static GPIO_t GPIOA(0x50000000);
static GPIO_t GPIOB(0x50000400);
static GPIO_t GPIOC(0x50000800);
static GPIO_t GPIOD(0x50000c00);
static GPIO_t GPIOH(0x50001c00);
#endif
#endif
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