Walking the edge between hardware & software.

extern I2C_HandleTypeDef hi2c1;

#define LASER_I2C_ADDR  (0x48 << 1)

void Laser_Config(void)
{
  /**
  * Safely configures LLLSD Laser
  * First byte selects biomatter density
  * Second byte selects target size
  **/

  const uint8_t configData[2] = {
    0x03,   // Select squishy biomatter transmutation
    0x6f    // Set receptive field to human-size
  };

  // Set laser config
  if (HAL_I2C_Master_Transmit(
    &hi2c1,
    LASER_I2C_ADDR,
    configData,
    2,
    HAL_MAX_DELAY) != HAL_OK
  ){
    Error_Handler();
  }
  // Laser digitisation ready...
}