Because the first application, because the first application was also selected, naturally happy. Lei Feng.com first asked to submit a trial report on November 19, 2015, but he could come here for several days without receiving the development board. It is calculated that the time for submitting a trial report specified by the website in Laili has not been 15 days. Time is money and life. Finally, I couldn't help but make two phone calls according to the contact information on Lei Feng's website. The FRDM-K64F Lei Feng's trial personnel replied not to worry. The personnel are still screening, and the development board has not been sent. At one time, I thought that something had happened in the middle, and the trial was gone, so I let go of it and didn't do what he wanted. Until November 18, 2015, my mobile phone received a text message informing me that the FRDM-K64F development board had been shipped, and my mood of not remembering was naturally touched again.

Some time ago, because we wanted to evaluate Freescale's air pressure sensor MPL3115A2, according to the recommendation of Freescale's agent, we ordered two boards, FRDM-KL26Z and FRDM_FXS_MULT2-B, on the official website. Unexpectedly, the amount of money on the list data generated on the official website is in RMB, but the unit is $. When it is delivered by express, The express brother said he would pay more than 1000 yuan of customs duties. My immediate reaction is that when the day comes, it's impossible. It is verified that there was an error on Freescale's website, which led to the price of the list of items attached to the express package being calculated by the customs in dollars, which naturally led to a high tariff. The weak asked the express brother, can I refuse? The courier said yes, and left the list for me, so he turned and left. I'm sorry for the express boy. He made a vain trip.

Next, there will be a long process of tracing and communication, with twists and turns. It took more than a month to get the board after placing the order. This application for the trial of the FRDM-K64F development board of Lei Feng.com is mainly to try the FRDM-K64F and FRDM-FXS-MULT2-B boards together. With all this talk, I just want to show that I have three Freescale development boards? Deser!

[Unpacking]

The first thing to receive the express is naturally to undress and go straight to the theme. Open the simple express packaging plastic bag and remove the red bubbles to protect the plastic film. What I saw was the classic simple and environmentally friendly packaging box of Freescale. Pull out the inner layer, and the FRDM-K64F, which has been waiting for a long time, lies quietly, sexy and indifferent, full of willful light.

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Needless to say, FRDM-K64F is a development board with a high B grid. One of the factors that many developers pay close attention to is that FRDM-K64F supports OPENSDA V2, and its firmware is completely replaced by an open source CMSIS DAP debugger, which solves the open source problem including Bootloader and all applications (Debug, Virtual Serial Port, MSD, etc.) In addition, I always feel that FRDM-K64F is different from other development boards, such as FRDM-KL26Z. After a closer look, I finally see that the problem is in the socket. The socket is much higher than other development boards, and it is composed of two parts. I wonder why this is so? After a little analysis, I found out that the lower part is male, while the upper part is female. It's true: I am a man, but how can I be a maid? As the saying goes, "basic" feelings are emerging.

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Installation

The next thing, of course, is to install the driver. The installation process will not be detailed. Please post a link here for quick review.

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The first link is the driver installation instructions page, and the second link is the driver execution file download address. It is specially reminded that before clicking Install, be sure to connect the OpenSDA USB interface of FRDM-K64F to the PC through the USB cable, otherwise you cannot continue.

Use

When FRDM-K64F and FRDM-FXS-MULT2-B are side by side, it gives a very harmonious feeling. Despite the inherent advantages of the Kinetics K series M4 core for sensor data fusion algorithms, it is also one of the considerations for the official efforts to promote the two for sensor data fusion applications to design similar image estimates. Seeing from afar, it's hard to distinguish male from female. When you put them together, it's hard to imagine such a robust FRDM-K64F playing the role of suffering. When FRDM-FXS-MULT2-B was inserted into FRDM-K64F, it was difficult at the beginning. When it was inserted, it was too urgent to pull it off, which reminded people of the classic lines in the "Japanese" drama - saying no, but being honest.

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To get to the point, after all the above is ready and connected to the computer, we can open Freescale Sensor Fusion Toolbox, the sensor fusion tool software of Freescale, click to select the port, and if the driver is installed correctly, you can see the serial port indication of your FRDM-K64F in the drop-down box.

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Next, click the File column in the menu and select Flash -->FRDM-K64F -->FFRDM-FXS-MULTI (- B), FRDM-FXS-9AXIS -->FFXOS8700+FXAS2100X (Acc, Mag, Gyro)

After clicking, a message box will appear, prompting you to put the USB socket on the left side of the development board FRDM-K64F, and your development board will be considered as a removable storage device on the computer,

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After confirmation, a Save As dialog box will appear. Select the disk that is actually your development board and click Save.

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At this point, you will download the BIN file to your development board and burn it to the flash of Kinetics K64. You will be prompted to unplug the board and power it on again.

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After re plugging and powering on, you will find that the light on the top right corner of the FRDM-K64F board is green and blinking. Congratulations, it means that the program you downloaded has identified the sensor on the board and can work normally. Select the corresponding serial port from the port selection drop-down box, and click the Auto Detect button Freescale Sensor FusionToolbox software to find and identify your board

The figure below shows that after clicking the button, the software will recognize and display the pattern of your development board, and display the sensor types supported by the board you selected previously, as well as the categories of algorithms. At the same time, you will see the prompt that the magnetic sensor needs to be calibrated by rotating your board.

If you want to align the direction of the board on your hand with the image of the board on the screen, you need to orient the board on your hand towards the screen, and select the menu Correct � For Display Orientation,

After clicking, you can see that the board image on the screen is in the same direction as the one on your hand.

The magnetic sensor calibration method mentioned above can only be rotated for a few circles like Little Bee's ? word dance. The following prompt indicates that the calibration has been completed, and its display has become an icon like a mobile phone signal.

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It is time to see the application effect of the sensor when FRDM-K64F cooperates with FRDM-FXS-MULTI2-B.

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As mentioned earlier, the green light flashes, indicating that the sensor recognizes and works normally. If you unplug the FRDM-FXS-MULTI2-B above, you will see that the light turns red when powered on, because the sensor on the board can no longer detect it. actually, The FRDM-K64F development board itself also has a sensor FXOS8700 (acceleration sensor+magnetic sensor). Smart you must know that you have chosen the corresponding option to implement the sensor demonstration according to the above steps, but please note that because there is no gyroscope on the FRDM-K64F development board, you can only choose Standalone to operate the demonstration, and because of the lack of gyroscope, The speed of its action will be affected.