MEAS MS8607 DCS FOR ZedBoard

Digital Pressure and Humudity Sensor

07/2016

Page 2

Drivers & Software

Detailed example software and drivers are available that execute directly, without modification, on a number of development

boards that support an integrated or synthesized microprocessor. The download contains several source files intended to

accelerate customer evaluation and design. The source code is written in standard ANSI C format, and all development

documentation including theory/operation, register description, and function prototypes are documented in the interface file.

Functions Summary

Enumerations

enum

ms8607_status { ms8607_status_ok, ms8607_status_i2c_transfer_error, ms8607_status_crc_error,

ms8607_status_heater_on_error }

enum

ms8607_humidity_resolution { ms8607_humidity_resolution_12b, ms8607_humidity_resolution_8b,

ms8607_humidity_resolution_10b, ms8607_humidity_resolution_11b }

enum

ms8607_pressure_resolution { ms8607_pressure_resolution_osr_256, ms8607_pressure_resolution_osr_512,

ms8607_pressure_resolution_osr_1024, ms8607_pressure_resolution_osr_2048,

ms8607_pressure_resolution_osr_4096, ms8607_pressure_resolution_osr_8192 }

enum

ms8607_battery_status { ms8607_battery_ok, ms8607_battery_low }

enum

ms8607_heater_status { ms8607_heater_off, ms8607_heater_on }

Functions

void

ms8607_init (u32)

Initializes the AXI address of the AXI IIC Core, initializes the internal humidity resolution variable to 12b, and initializes the

internal pressure resolution-

oversampling rate to 8192 in order to reflect the sensor’s initial resolution value on reset.

enum

ms8607_status

ms8607_reset (void)

enum

ms8607_status

ms8607_read_prom (void)

Reads the factory calibrated coefficients for use in temperature and pressure conversion.

enum

ms8607_status

ms8607_set_humidity_resolution (enum ms8607_humidity_resolution)

Read the user register from the device, modify its contents to reflect the resolution that is passed in to this function, and

then write the updated user register value to the MS8607 device.

enum

ms8607_status

ms8607_set_pressure_resolution (enum ms8607_pressure_resolution_osr)

Set the over-sampling rate resolution for pressure measurements.

enum

ms8607_status

ms8607_read_temperature_pressure_humidity (float* temperature, float* pressure, float* relative_humidity)

enum

ms8607_status

ms8607_get_battery_status (ms8607_battery_status* batt_stat)

enum

ms8607_status

ms8607_get_heater_status (ms8607_battery_status* heat_stat)

enum

ms8607_status

ms8607_enable_heater (void)

enum

ms8607_status

ms8607_disable_heater (void)

float

ms8607_compute_dew_point (float Tamb, float RHamb)

Compute dew point temperature in degrees C.

Project Setup

This project is based on a ZedBoard. The FPGA hardware and the console application will be loaded via SD card.

You will need:

ZedBoard

MS8607 sensor for Digilent Pmod™ board

SD card

ZedBoard power adapter

Digilent Pmod

™ is a trademark.