READ DATA OF MMA8452

594160903 — Tue, 03 Feb 2026 23:00:19 GMT

I am a rookie of using MMA8452, I want to read data of mma8452 to know the x,y,z;But I read data is always F and 4095,

please help me , thanks!!!

void Multiple_Read_MMA8452(void)
{
uchar i;
MMA8452_Start();
MMA8452_SendByte(0x38 )
MMA8452_SendByte(0x01);
MMA8452_Start();
MMA8452_SendByte(0x38 +1);
for (i=0; i<6; i++)
{
BUF[i] = MMA8452_RecvByte();
if (i == 5)
{
MMA8452_SendACK((BitAction)1);
}
else
{
MMA8452_SendACK((BitAction)0);
}
}
MMA8452_Stop();
Delay5ms();
}

void Init_MMA8452(void)
{
Single_Write_MMA8452(0x2A,0x01); //
Single_Write_MMA8452(0x2B,0x02); //

}

Re: READ DATA OF MMA8452

david_diaz — Thu, 27 Apr 2017 19:39:55 GMT

Hello,

Thank you very much for writing.

In this case, I’d like to recommend the application note AN4076 below:

Data Manipulation and Basic Settings of the MMA8451, 2, 3Q

This application note accompanies the MMA8451, 2, 3Q Driver Code and will explain the following:

Changing the operational modes (Standby, Active 2g, Active 4g and Active 8g)
Changing Oversampling Modes
Changing the Data Rate
Changing the High-Pass Filter Cutoff Frequency
8-bit data vs. 14/12/10-bit data
Changing Data Formats (hex to counts to decimal numbers)
Streaming XYZ data polling vs. Streaming XYZ data with interrupts
Using the FIFO in the MMA8451

Besides, you may use the sample project below as a reference for your application.

MMA8451Q - Bare metal example project

Please let me know if you have any further question.

Regards,

David

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