mph 10 Posted September 7, 2018 Share Posted September 7, 2018 There is code available to implement I2C communication between the MSP430 and the HDC2010 temperature-humidity sensor, but it's a bit like an onion -- you have to peel away layer after layer in various libraries to drill down into what is happening at the register level. I decided to write some transparent demo code for this sensor that is self-contained: everything related to the I2C interface is in a single C program. It has been successfully tested with the F5529 Launchpad. This is a simple MCU polling operation that periodically makes a T-H measurement using the on-demand mode of the sensor. The data is sent to the serial port for display on a terminal program. The on-board heater is activated for a few seconds upon reset. I have not implemented the temperature-humidity high/low interrupts. One could also configure the sensor to output data periodically and toggle its DRDY pin to wake-up the MCU from LPM4. Polling code is here: https://github.com/microphonon/HDC2010 The HDC2010 is a tiny sensor with a 6-bump BGA footprint. TI makes an evaluation module that uses an MSP430F5528 to interface the sensor with a configuration/graphing GUI program. Their program only runs on 64-bit Windows. The portion of the PCB hardware containing the sensor can be broken off (permanently) to reduce thermal mass and allow placement in a project. I decided to make my own breakout boards (see photo), but just learned that MikroElektronika started selling essentially the same thing for $13 (MIKROE-2937). Fmilburn, dubnet and Rei Vilo 2 1 Quote Link to post Share on other sites
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