Alfredo Nahuat

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9 years, 5 months ago.

Why the code doesn´t work into the FRDM-K22F

I used the code and changed the ports to use the accelerometer / magnetometer on board K22F yet to use it and move it just me evuelve accelerometer values ​​as X -1 -1 -1 AT Y and Z that I can or should I do??

Question relating to:

Last updated: 25 Apr 2014
A Simple Hello World for the FXAS8700Q combination accelerometer / magnetometer FXOS8700Q

2 Answers

Geremia G
9 years, 5 months ago.

you should also set the proper i2c pin and slave addr for K22F, different from K64F

FXOS8700Q_acc acc( PTB3, PTB2, FXOS8700CQ_SLAVE_ADDR2); // Proper Ports and I2C Address for K22F Freedom board
FXOS8700Q_mag mag( PTB3, PTB2, FXOS8700CQ_SLAVE_ADDR2); // Proper Ports and I2C Address for K22F Freedom board

Accepted Answer

thank you very much longer works and gives me values X, Y and Z per, I would like to know where and how should I add the calculations to make a compass with the magnetometer ... if you could help me I'd appreciate it and thank you very much for all the support

posted by Alfredo Nahuat 07 Nov 2014
Jose Corbalán
9 years, 5 months ago.

There is an error in I2C library in mbed-src. Check this question: http://developer.mbed.org/forum/bugs-suggestions/topic/5220/

I can´t found the library can you help me?

posted by Alfredo Nahuat 06 Nov 2014

You have to load the library "mbed-src" and you have to change in the file "mbed-src/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/i2c_api.c the line 100 and you have to swap the "return I2C_HAL_GetStatusFlag(i2c_addrs[obj->instance], kI2CReceivedNak) ? 0 : 1;" to "return I2C_HAL_GetStatusFlag(i2c_addrs[obj->instance], kI2CReceivedNak) ? 1 : 0;

It will work!

posted by Jose Corbalán 07 Nov 2014

I will change that part but still does not work! ... which could be the problem ??

posted by Alfredo Nahuat 07 Nov 2014