C++ (Cpp) b8tob16 Examples

Example #1

File: lm75.c Project: justdoitding/Nuttx_PSoC4

static int lm75_readb16(FAR struct lm75_dev_s *priv, uint8_t regaddr,
                        FAR b16_t *regvalue)
{
  uint8_t buffer[2];
  int ret;

  /* Write the register address */

  I2C_SETADDRESS(priv->i2c, priv->addr, 7);
  ret = I2C_WRITE(priv->i2c, &regaddr, 1);
  if (ret < 0)
    {
      sndbg("I2C_WRITE failed: %d\n", ret);
      return ret;
    }

  /* Restart and read 16-bits from the register (discarding 7) */

  ret = I2C_READ(priv->i2c, buffer, 2);
  if (ret < 0)
    {
      sndbg("I2C_READ failed: %d\n", ret);
      return ret;
    }

  /* Data format is:  TTTTTTTT Txxxxxxx where TTTTTTTTT is a nine-bit,
   * signed temperature value with LSB = 0.5 degrees centigrade.  So the
   * raw data is b8_t
   */

  *regvalue = b8tob16((b8_t)buffer[0] << 8 | (b8_t)buffer[1]);
  sndbg("addr: %02x value: %08x ret: %d\n", regaddr, *regvalue, ret);
  return OK;
}

Example #2

File: lm75.c Project: AlexShiLucky/NuttX

static int lm75_readb16(FAR struct lm75_dev_s *priv, uint8_t regaddr,
                        FAR b16_t *regvalue)
{
  uint8_t buffer[2];
  int ret;

  /* Write the register address */

  ret = lm75_i2c_write(priv, &regaddr, 1);
  if (ret < 0)
    {
      snerr("ERROR: i2c_write failed: %d\n", ret);
      return ret;
    }

  /* Restart and read 16-bits from the register (discarding 7) */

  ret = lm75_i2c_read(priv, buffer, 2);
  if (ret < 0)
    {
      snerr("ERROR: i2c_read failed: %d\n", ret);
      return ret;
    }

  /* Data format is:  TTTTTTTT Txxxxxxx where TTTTTTTTT is a nine-bit,
   * signed temperature value with LSB = 0.5 degrees centigrade.  So the
   * raw data is b8_t
   */

  *regvalue = b8tob16((b8_t)buffer[0] << 8 | (b8_t)buffer[1]);
  sninfo("addr: %02x value: %08x ret: %d\n", regaddr, *regvalue, ret);
  return OK;
}