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#ifndef I2C_H
#define I2C_H
#include <stdint.h>
#include "interrupt.h"
#include "pin.h"
struct I2C_reg_t {
volatile uint32_t CR1;
volatile uint32_t CR2;
volatile uint32_t OAR1;
volatile uint32_t OAR2;
volatile uint32_t DR;
volatile uint32_t SR1;
volatile uint32_t SR2;
volatile uint32_t CCR;
volatile uint32_t TRISE;
};
class I2C_t {
private:
volatile uint8_t addr;
volatile uint8_t writing;
volatile uint8_t reading;
volatile uint8_t* write_p;
volatile uint8_t* read_p;
volatile bool busy;
public:
I2C_reg_t& reg;
const uint32_t clk;
Interrupt::IRQ irq_ev_n;
Interrupt::IRQ irq_er_n;
I2C_t(uint32_t reg_addr, uint32_t bus_clk, Interrupt::IRQ ev_n, Interrupt::IRQ er_n) : reg(*(I2C_reg_t*)reg_addr), clk(bus_clk), irq_ev_n(ev_n), irq_er_n(er_n) {
reading = writing = 0;
}
void irq_ev();
void irq_er();
void handle_error();
void enable(Pin& scl, Pin& sda);
void write_reg(uint8_t addr_, uint8_t reg_, uint8_t data);
void read_reg(uint8_t addr_, uint8_t reg_, uint8_t len, uint8_t* buf);
};
#if defined(STM32F1)
extern I2C_t I2C1;
extern I2C_t I2C2;
#elif defined(STM32F4)
extern I2C_t I2C1;
extern I2C_t I2C2;
extern I2C_t I2C3;
#endif
typedef I2C_t I2C;
#endif
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