/* Hardware setup */ const { PORT_I2C = 0, // The first I2C interface should be used. CHIP_ADDR = INA233_I2C_ADR0, // I2C Address of the chip // (depends on the logic level at the chip's A0 and A1 pins) R_SHUNT = 25, // Shunt resistor connected between the IN+ and IN- pins of the INA233 [mOhm] } /* Handles for available sensors */ new hINA[TINA233_Handle]; // Handle to manage the INA233 /* 1 sec. timer is used for the general program sequence */ #callback MainTimer() { new vin; // Input/Bus Voltage read from the INA233 [mV] new iin; // Input Current read from the INA233 [uA] catch(INA233_ReadVIn(hINA, vin)); // Reads Input/Bus Voltage ​​from the INA233 #watch("vin=%dmV", vin); // Issues Input/Bus Voltage via the watch panel // Calculates the input current based on the shunt voltage read from the INA233 // and shunt resistor value. catch(INA233_ReadIIn(hINA, R_SHUNT, iin)); if(iin > 10000) // If the input current is >10mA -> #watch("iin=%.2fmA", iin / 1000.0); // Issues the input current in mA else // Otherwise -> #watch("iin=%duA", iin); // Issues the input current in mA } /* Application entry point */ main() { // Inits the I2C interface catch( rM2M_I2cInit( PORT_I2C, INA233_CLOCK, 0)); // Initializes i2c communication with the INA233 and prepares the INA233 for use catch(INA233_Init(hINA, PORT_I2C, CHIP_ADDR)); // Activates the INA233 using the following configuration: // Continuous measurement for Shunt and Bus Voltage (Power-On Default) // Conversion Time is 1.1ms (Power-On Default) // 4 samples will be averaged (Power-On Default = 1) new config = INA233_CFG_MODE_VSH_VBUS_CONT | INA233_CFG_VSHCT_1_1MS | INA233_CFG_VBUS_1_1MS | INA233_CFG_AVG_4; catch(INA233_Enable(hINA, config)); // Initialisation of a cyclic sec. timer setInterval(MainTimer, 1000); }