Software customization and real-time debug

UM1502

20/23

Doc ID 022625 Rev 1

6

Software customization and real-time debug

The STEVAL-MKI111V1 demonstration board can be fully adapted to the container the user

intends to test. The firmware included in the demonstration board kit is provided as open

source. The demonstration board can be connected to an ST debugging tool with SWIM

interface in order to read in real-time the signals coming from the MEMS sensor.

6.1

Pressure signal

The pressure read by the MEMS sensor is stored in a variable which is constantly updated

in an infinite loop. To avoid oscillations and reduce the error introduced by false readings,

the variable holds an average pressure value, which is obtained out of 8 raw readings

coming from the MEMS sensor. Pressure readings are expressed as absolute values.

Pressure signal:

Average_Pressure

6.2

Temperature signal

The temperature read by the MEMS sensor is stored in a variable which is constantly

updated in an infinite loop. To avoid oscillations and reduce the error introduced by false

readings, the variable holds an average temperature value, which is obtained out of 8 raw

readings coming from the MEMS sensor. Temperature readings are expressed as 2’s

complement numbers.

Pressure signal:

Average_Temperature