diff options
Diffstat (limited to 'gpio')
| -rw-r--r-- | gpio/gpio.h | 43 | ||||
| -rw-r--r-- | gpio/pin.h | 137 |
2 files changed, 180 insertions, 0 deletions
diff --git a/gpio/gpio.h b/gpio/gpio.h new file mode 100644 index 0000000..324950e --- /dev/null +++ b/gpio/gpio.h @@ -0,0 +1,43 @@ +#ifndef GPIO_H +#define GPIO_H + +struct GPIO_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(STM32F4) + volatile uint32_t MODER; + volatile uint32_t OTYPER; + volatile uint32_t OSPEEDER; + 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 +}; + +#if defined(STM32F1) +static GPIO_t& GPIOA = *(GPIO_t*)0x40010800; +static GPIO_t& GPIOB = *(GPIO_t*)0x40010c00; +static GPIO_t& GPIOC = *(GPIO_t*)0x40011000; +#elif defined(STM32F4) +static GPIO_t& GPIOA = *(GPIO_t*)0x40020000; +static GPIO_t& GPIOB = *(GPIO_t*)0x40020400; +static GPIO_t& GPIOC = *(GPIO_t*)0x40020800; +static GPIO_t& GPIOD = *(GPIO_t*)0x40020c00; +static GPIO_t& GPIOE = *(GPIO_t*)0x40021000; +static GPIO_t& GPIOF = *(GPIO_t*)0x40021400; +static GPIO_t& GPIOG = *(GPIO_t*)0x40021800; +static GPIO_t& GPIOH = *(GPIO_t*)0x40021c00; +static GPIO_t& GPIOI = *(GPIO_t*)0x40022000; +#endif + +#endif diff --git a/gpio/pin.h b/gpio/pin.h new file mode 100644 index 0000000..1ad3ca2 --- /dev/null +++ b/gpio/pin.h @@ -0,0 +1,137 @@ +#ifndef PIN_H +#define PIN_H + +#include "gpio.h" + +class Pin { + private: + GPIO_t& g; + int n; + + public: + Pin(GPIO_t& gpio, int pin) : g(gpio), n(pin) {} + + enum Mode { + Input, + Output, + AF, + Analog, + }; + + enum Type { + PushPull, + OpenDrain, + }; + + enum Pull { + PullNone, + PullUp, + PullDown, + }; + + void set_mode(Mode m) { + g.MODER = (g.MODER & ~(3 << (n * 2))) | m << (n * 2); + } + + void set_type(Type t) { + if(t) { + g.OTYPER |= 1 << n; + } else { + g.OTYPER &= ~(1 << n); + } + } + + void set_pull(Pull p) { + g.PUPDR = (g.PUPDR & ~(3 << (n * 2))) | p << (n * 2); + } + + void set_af(int af) { + if(n < 8) { + g.AFRL = (g.AFRL & ~(0xf << (n * 4))) | af << (n * 4); + } else { + g.AFRH = (g.AFRH & ~(0xf << (n * 4 - 32))) | af << (n * 4 - 32); + } + } + + void on() { + g.BSRR = 1 << n; + } + + void off() { + g.BSRR = 1 << 16 << n; + } + + void set(bool value) { + if(value) { + on(); + } else { + off(); + } + } + + bool get() { + return g.IDR & (1 << n); + } + + void toggle() { + set(!(g.ODR & (1 << n))); + } +}; + +static Pin PA0(GPIOA, 0); +static Pin PA1(GPIOA, 1); +static Pin PA2(GPIOA, 2); +static Pin PA3(GPIOA, 3); +static Pin PA4(GPIOA, 4); +static Pin PA5(GPIOA, 5); +static Pin PA6(GPIOA, 6); +static Pin PA7(GPIOA, 7); +static Pin PA8(GPIOA, 8); +static Pin PA9(GPIOA, 9); +static Pin PA10(GPIOA, 10); +static Pin PA11(GPIOA, 11); +static Pin PA12(GPIOA, 12); +static Pin PA13(GPIOA, 13); +static Pin PA14(GPIOA, 14); +static Pin PA15(GPIOA, 15); + +static Pin PB0(GPIOB, 0); +static Pin PB1(GPIOB, 1); +static Pin PB2(GPIOB, 2); +static Pin PB3(GPIOB, 3); +static Pin PB4(GPIOB, 4); +static Pin PB5(GPIOB, 5); +static Pin PB6(GPIOB, 6); +static Pin PB7(GPIOB, 7); +static Pin PB8(GPIOB, 8); +static Pin PB9(GPIOB, 9); +static Pin PB10(GPIOB, 10); +static Pin PB11(GPIOB, 11); +static Pin PB12(GPIOB, 12); +static Pin PB13(GPIOB, 13); +static Pin PB14(GPIOB, 14); +static Pin PB15(GPIOB, 15); + +static Pin PC0(GPIOC, 0); +static Pin PC1(GPIOC, 1); +static Pin PC2(GPIOC, 2); +static Pin PC3(GPIOC, 3); +static Pin PC4(GPIOC, 4); +static Pin PC5(GPIOC, 5); +static Pin PC6(GPIOC, 6); +static Pin PC7(GPIOC, 7); +static Pin PC8(GPIOC, 8); +static Pin PC9(GPIOC, 9); +static Pin PC10(GPIOC, 10); +static Pin PC11(GPIOC, 11); +static Pin PC12(GPIOC, 12); +static Pin PC13(GPIOC, 13); +static Pin PC14(GPIOC, 14); +static Pin PC15(GPIOC, 15); + +static Pin PD12(GPIOD, 12); +static Pin PD13(GPIOD, 13); +static Pin PD14(GPIOD, 14); +static Pin PD15(GPIOD, 15); + +#endif |