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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef GPIO_H
#define GPIO_H
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
class GPIO {
private:
GPIO(const GPIO ©);
public:
GPIO () {}
enum Pin : unsigned char {
pa0 = 0, pa1, pa2, pa3, pa4, pa5, pa6, pa7,
pa8, pa9, pa10, pa11, pa12, pa13, pa14, pa15,
pb0, pb1, pb2, pb3, pb4, pb5, pb6, pb7,
pb8, pb9, pb10, pb11, pb12, pb13, pb14, pb15,
pc0, pc1, pc2, pc3, pc4, pc5, pc6, pc7,
pc8, pc9, pc10, pc11, pc12, pc13, pc14, pc15,
PIN_INVALID
};
inline void setup() {
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_GPIOB);
rcc_periph_clock_enable(RCC_GPIOC);
// Set LED as output
gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5);
}
#pragma GCC diagnostic ignored "-Wunused-parameter"
inline void led_on(unsigned char id = 0) {
gpio_set(GPIOA, GPIO5);
}
inline void led_off(unsigned char id = 0) {
gpio_clear(GPIOA, GPIO5);
}
inline void led_toggle(unsigned char id = 0) {
gpio_toggle(GPIOA, GPIO5);
}
#pragma GCC diagnostic pop
inline void input(unsigned char const pin) {
if (pin < pb0) {
gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, 1 << pin);
} else if (pin < pc0) {
gpio_mode_setup(GPIOB, GPIO_MODE_INPUT, GPIO_PUPD_NONE, 1 << (pin - pb0));
} else if (pin < PIN_INVALID) {
gpio_mode_setup(GPIOC, GPIO_MODE_INPUT, GPIO_PUPD_NONE, 1 << (pin - pc0));
}
}
inline void input(unsigned char const pin, unsigned char const pull) {
}
inline void output(unsigned char const pin) {
if (pin < pb0) {
gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, 1 << pin);
} else if (pin < pc0) {
gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, 1 << (pin - pb0));
} else if (pin < PIN_INVALID) {
gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, 1 << (pin - pc0));
}
}
/*
inline void output(unsigned char const pin, unsigned char const value) {
}*/
inline unsigned int read(unsigned char const pin) {
if (pin < pb0) {
return gpio_get(GPIOA, 1 << pin);
} else if (pin < pc0) {
return gpio_get(GPIOB, 1 << (pin-pb0));
} else if (pin < PIN_INVALID) {
return gpio_get(GPIOC, 1 << (pin-pc0));
}
}
inline void write(unsigned char const pin, unsigned char value) {
if (pin < pb0) {
if (value) {
gpio_port_write(GPIOA, gpio_port_read(GPIOA) | (1 << pin));
} else {
gpio_port_write(GPIOA, gpio_port_read(GPIOA) & ~(1 << pin));
}
} else if (pin < pc0) {
if (value) {
gpio_port_write(GPIOB, gpio_port_read(GPIOB) | (1 << (pin-pb0)));
} else {
gpio_port_write(GPIOB, gpio_port_read(GPIOB) & ~(1 << (pin-pb0)));
}
} else if (pin < PIN_INVALID) {
if (value) {
gpio_port_write(GPIOC, gpio_port_read(GPIOC) | (1 << (pin-pc0)));
} else {
gpio_port_write(GPIOC, gpio_port_read(GPIOC) & ~(1 << (pin-pc0)));
}
}
}
};
extern GPIO gpio;
#endif
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