SensorsのトピックRe: MMA8652FC 8 bits Offset

MMA8652FC 8 bits Offset

sérgioneves — Tue, 03 Feb 2026 22:11:59 GMT

Hello everyone,

I follow the project "MMA8652FC - Bare metal example project", link

But if I want to use the sensor configured to use 8 bits, how do I calculate the offset values?

I get the Xout_8_bit, Yout_8_bit, Zout_8_bit. And I know the sensitivity:

SENSITIVITY_2G_8bits 64

SENSITIVITY_4G_8bits 32

SENSITIVITY_8G_8bits 16

So how to get:

X_offset_2G_8_bit = ?

Y_offset_2G_8_bit = ?

Z_offset_2G_8_bit = ?

X_offset_4G_8_bit = ?

Y_offset_4G_8_bit = ?

Z_offset_4G_8_bit = ?

X_offset_8G_8_bit = ?

Y_offset_8G_8_bit = ?

Z_offset_8G_8_bit = ?

Thanks.

Regards,

Sérgio

TomasVaverka — Thu, 18 Jan 2018 08:34:44 GMT

Hello Sérgio,

SENSITIVITY_2G_8bits 64

SENSITIVITY_4G_8bits 32

SENSITIVITY_8G_8bits 16

±2g:

X_offset_2G_8_bit = Xout_8_bit * 8 * (-1);

Y_offset_2G_8_bit = Yout_8_bit * 8 * (-1);

Z_offset_2G_8_bit = (Zout_8_bit - SENSITIVITY_2G_8bits) * 8 * (-1);

±4g:

X_offset_4G_8_bit = Xout_8_bit * 16 * (-1);

Y_offset_4G_8_bit = Yout_8_bit * 16 * (-1);

Z_offset_4G_8_bit = (Zout_8_bit - SENSITIVITY_4G_8bits) * 16 * (-1);

±8g:

X_offset_8G_8_bit = Xout_8_bit * 32 * (-1);

Y_offset_8G_8_bit = Yout_8_bit * 32 * (-1);

Z_offset_8G_8_bit = (Zout_8_bit - SENSITIVITY_8G_8bits) * 32 * (-1);

Best regards,

Tomas

sérgioneves — Thu, 18 Jan 2018 15:27:11 GMT

Hello Tomas,

Thanks for all the help.

Regards,

Sérgio