pimoroni-pico/common/pimoroni_i2c.hpp

87 lines
2.9 KiB
C++

#pragma once
#include <stdint.h>
#include <climits>
#include "hardware/i2c.h"
#include "hardware/gpio.h"
#include "pimoroni_common.hpp"
#include "pimoroni_i2c.hpp"
namespace pimoroni {
class I2C {
private:
i2c_inst_t *i2c = PIMORONI_I2C_DEFAULT_INSTANCE;
uint sda = I2C_DEFAULT_SDA;
uint scl = I2C_DEFAULT_SCL;
uint interrupt = PIN_UNUSED;
uint32_t baudrate = I2C_DEFAULT_BAUDRATE;
public:
I2C(BOARD board, uint32_t baudrate = I2C_DEFAULT_BAUDRATE) : baudrate(baudrate) {
switch(board) {
case BREAKOUT_GARDEN:
sda = I2C_BG_SDA;
scl = I2C_BG_SCL;
interrupt = I2C_BG_INT;
break;
case PICO_EXPLORER:
default:
sda = I2C_DEFAULT_SDA;
scl = I2C_DEFAULT_SCL;
interrupt = I2C_DEFAULT_INT;
break;
case PLASMA_STICK:
sda = I2C_BG_SDA;
scl = I2C_BG_SCL;
interrupt = PIN_UNUSED;
break;
case PLASMA_2040:
case INTERSTATE_75:
case SERVO_2040:
case MOTOR_2040:
sda = I2C_HEADER_SDA;
scl = I2C_HEADER_SCL;
interrupt = I2C_HEADER_INT;
break;
}
init();
}
I2C(uint sda, uint scl, uint32_t baudrate = I2C_DEFAULT_BAUDRATE) : sda(sda), scl(scl), baudrate(baudrate) {
init();
}
I2C() : I2C(I2C_DEFAULT_SDA, I2C_DEFAULT_SCL) {}
~I2C() {
i2c_deinit(i2c);
gpio_disable_pulls(sda);
gpio_set_function(sda, GPIO_FUNC_NULL);
gpio_disable_pulls(scl);
gpio_set_function(scl, GPIO_FUNC_NULL);
}
i2c_inst_t* pin_to_inst(uint pin);
void reg_write_uint8(uint8_t address, uint8_t reg, uint8_t value);
uint8_t reg_read_uint8(uint8_t address, uint8_t reg);
uint16_t reg_read_uint16(uint8_t address, uint8_t reg);
int16_t reg_read_int16(uint8_t address, uint8_t reg);
uint32_t reg_read_uint32(uint8_t address, uint8_t reg);
int write_bytes(uint8_t address, uint8_t reg, const uint8_t *buf, int len);
int read_bytes(uint8_t address, uint8_t reg, uint8_t *buf, int len);
uint8_t get_bits(uint8_t address, uint8_t reg, uint8_t shift, uint8_t mask=0b1);
void set_bits(uint8_t address, uint8_t reg, uint8_t shift, uint8_t mask=0b1);
void clear_bits(uint8_t address, uint8_t reg, uint8_t shift, uint8_t mask=0b1);
int write_blocking(uint8_t addr, const uint8_t *src, size_t len, bool nostop);
int read_blocking(uint8_t addr, uint8_t *dst, size_t len, bool nostop);
i2c_inst_t* get_i2c() {return i2c;}
uint get_scl() {return scl;}
uint get_sda() {return sda;}
uint32_t get_baudrate() {return baudrate;}
private:
void init();
};
}