C++ (Cpp) i2c_start_cond Examples

Example #1

File: video.c Project: RTEMS/rtems

static unsigned char read_reg(unsigned char addr)
{
  unsigned char r;

  i2c_start_cond();
  i2c_write(0x40);
  i2c_write(addr);
  i2c_start_cond();
  i2c_write(0x41);
  r = i2c_read(0);
  i2c_stop_cond();

  return r;
}

Example #2

File: video.c Project: RTEMS/rtems

static void write_reg(unsigned char addr, unsigned char val)
{
  i2c_start_cond();
  i2c_write(0x40);
  i2c_write(addr);
  i2c_write(val);
  i2c_stop_cond();
}

Example #3

File: dac.c Project: sbourdeauducq/serdes-tdc

void set_dac_level(int level)
{
	if(!i2c_init()) {
		printf("I2C init failed\n");
		return;
	}
	i2c_start_cond();
	if(!i2c_write(0x90))
		printf("DAC not detected\n");
	i2c_write(0x2f);
	i2c_write((level & 0xff0) >> 4);
	i2c_write((level & 0x00f) << 4);
	i2c_stop_cond();
}

Example #4

File: libI2C.c Project: Archmere-Robotics/libI2C

// Write a byte to I2C bus. Return 0 if ack by the slave.
bool i2c_write_byte(bool send_start,
                    bool send_stop,
                    unsigned char byte) {
  unsigned bit;
  bool nack;
  if (send_start) {
    i2c_start_cond();
  }
  for (bit = 0; bit < 8; bit++) {
    i2c_write_bit((byte & 0x80) != 0);
    byte <<= 1;
  }
  nack = i2c_read_bit();
  if (send_stop) {
    i2c_stop_cond();
  }
  return nack;
}