5#ifndef MiniR4I2CDevice_H
6#define MiniR4I2CDevice_H
12# define ADDR_PCA954X 0x70
22 MiniR4_I2CDevice(uint8_t addr, TwoWire* theWire = &Wire, uint8_t mux_ch = -1);
24 bool begin(
bool addr_detect =
true);
28 bool read(uint8_t* buffer,
size_t len,
bool stop =
true);
30 const uint8_t* buffer,
size_t len,
bool stop =
true,
const uint8_t* prefix_buffer =
nullptr,
31 size_t prefix_len = 0);
33 const uint8_t* write_buffer,
size_t write_len, uint8_t* read_buffer,
size_t read_len,
47 size_t _maxBufferSize;
48 bool _read(uint8_t* buffer,
size_t len,
bool stop);
49 void i2cMUXSelect(
void);
The class which defines how we will talk to this device over I2C.
MiniR4_I2CDevice(uint8_t addr, TwoWire *theWire=&Wire, uint8_t mux_ch=-1)
Create an I2C device at a given address.
bool write(const uint8_t *buffer, size_t len, bool stop=true, const uint8_t *prefix_buffer=nullptr, size_t prefix_len=0)
Write a buffer or two to the I2C device. Cannot be more than maxBufferSize() bytes.
uint8_t address(void)
Returns the 7-bit address of this device.
bool setSpeed(uint32_t desiredclk)
Change the I2C clock speed to desired (relies on underlying Wire support!
void end(void)
De-initialize device, turn off the Wire interface.
bool write_then_read(const uint8_t *write_buffer, size_t write_len, uint8_t *read_buffer, size_t read_len, bool stop=false)
Write some data, then read some data from I2C into another buffer. Cannot be more than maxBufferSize(...
size_t maxBufferSize()
How many bytes we can read in a transaction.
bool detected(void)
Scans I2C for the address - note will give a false-positive if there's no pullups on I2C.
bool read(uint8_t *buffer, size_t len, bool stop=true)
Read from I2C into a buffer from the I2C device. Cannot be more than maxBufferSize() bytes.
bool begin(bool addr_detect=true)
Initializes and does basic address detection.