Hello paraas,
Unfortuantely, we don't have example code for Teensy 3.2 MCU.
However, here is the my i2c example for arduino.
bmi2xy_hal_i2c_bus_read and bmi2xy_hal_i2c_bus_write are put to bmi2 function pointers as below.
Thanks,
bmi2.read = bmi2xy_hal_i2c_bus_read;
bmi2.write = bmi2xy_hal_i2c_bus_write;
/*! This API is used to perform I2C read operation with sensor */
int8_t bmi2xy_hal_i2c_bus_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr)
{
int8_t rslt = 0;
//uint8_t dev_id = 0x68;
uint8_t* dev_id = (uint8_t *)intf_ptr;
rslt = BMI270_read_i2c(*dev_id, reg_addr, reg_data, length);
return rslt;
}
/*! This API is used to perform I2C write operations with sensor */
int8_t bmi2xy_hal_i2c_bus_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr)
{
int8_t rslt = 0;
// uint8_t dev_id = 0x68;
uint8_t* dev_id = (uint8_t *)intf_ptr;
rslt = BMI270_write_i2c(*dev_id, reg_addr, (uint8_t *)reg_data, length);
return rslt;
}
int8_t BMI270_read_i2c(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t count)
{
/* dev_addr: I2C device address.
reg_addr: Starting address for writing the data.
reg_data: Data to be written.
count: Number of bytes to write */
// Begin I2C communication with provided I2C address
Wire.beginTransmission(dev_addr);
Wire.write(reg_addr);
// Done writting, end the transmission
int8_t returned = Wire.endTransmission();
if (returned)
{
return returned;
}
// Requests the required number of bytes from the sensor
Wire.requestFrom((int)dev_addr, (int)count);
uint16_t i;
// Reads the requested number of bytes into the provided array
for (i = 0; (i < count) && Wire.available(); i++)
{
reg_data[i] = Wire.read(); // This is for the modern Wire library
}
// This must return 0 on success, any other value will be interpreted as a communication failure.
return 0;
}
int8_t BMI270_write_i2c(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t count)
{
/* dev_addr: I2C device address.
reg_addr: Starting address for reading the data.
reg_data: Buffer to take up the read data.
count: Number of bytes to read. */
// Begin I2C communication with provided I2C address
Wire.beginTransmission(dev_addr);
Wire.write(reg_addr);
uint16_t i;
// Writes the requested number of bytes from the provided array
for (i = 0; i < count; i++)
{
Wire.write(reg_data[i]); // This is for the modern Wire library
}
// Done writting, end the transmission
int8_t returned = Wire.endTransmission();
return returned;
}
