pressure sensor MPL115A2 with FRDM-KL26Z

b50650 — Tue, 03 Feb 2026 21:20:55 GMT

HI, I am working on a demo on smart inhaler. Does anyone have the source code for pressure sensor MPL115A2? I am trying to use it with FRDM-KL26Z. Any help on where can I find it would be appreciated.

Re: pressure sensor MPL115A2 with FRDM-KL26Z

TomasVaverka — Mon, 02 Nov 2020 13:09:38 GMT

Hi Parth,

Attached you can find the source code for the FRDM-KL26Z board and the MPL115A2 pressure sensor on the KITMPL115A2I2C board. It is written in the CW for MCU's v10.6 and uses the I2C1 module (PTC1 and PTC2 pins) for I2C communication. Both the pressure and temperature are calculated in the infinite while loop:

while(1)
{
     I2C_WriteRegister(MPL115A2_I2C_ADDRESS, CONVERT_REG, 0x00);        // Start pressure and temperature conversion
      
     Pause(0x17B2);        // Wait ~4ms (3ms is a minimum delay)
      
     I2C_ReadMultiRegisters(MPL115A2_I2C_ADDRESS, Padc_MSB_REG, 4, RawPressureTempData);        // Read raw pressure and temperature data
      
     // Temperature calculation  
     Tadc = ((uint16_t) (RawPressureTempData[2]<<8 | RawPressureTempData[3])) >> 6;
     Temperature = (605.75 - Tadc) * 0.186916;
      
     // Pressure calculation
     Padc = ((uint16_t) (RawPressureTempData[0]<<8 | RawPressureTempData[1])) >> 6;                  
     c12x2 = (((float) C12) / 4194304) * Tadc;
     a1 = (((float) B1) / 8192) + c12x2;
     a1x1 = a1 * Padc;
     y1 = (((float) A0) / 8) + a1x1;
     a2x2 = (((float) B2) / 16384) * Tadc;
     Pcomp = y1 + a2x2;      
     Pressure = (Pcomp * 65 / 1023) + 50;
      
     Pause(0xFFFF); 
}

and can be watched in the "Variables" window on the top right of the Debug perspective:

I hope it helps.

Regards,

Tomas

PS: If my answer helps to solve your question, please mark it as "Correct" or “Helpful”. Thank you.

Re: pressure sensor MPL115A2 with FRDM-KL26Z

b50650 — Thu, 17 Jul 2014 19:58:43 GMT

Thanks a lot.

It is working.

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pressure sensor MPL115A2 with FRDM-KL26Z

Re: pressure sensor MPL115A2 with FRDM-KL26Z

Re: pressure sensor MPL115A2 with FRDM-KL26Z