Advanced magnetometer program example for Hexiwear featuring OLED Display
Dependencies: FXOS8700 Hexi_OLED_SSD1351
This project demonstrates the use of the FXOS8700CQ Magnetometer sensor embedded in Hexiwear
Compile the project and copy the binary "Hexi_Magneto-V2_Example_HEXIWEAR.bin" in the DAP-LINK drive from your computer file explorer Press the K64F-RESET button on the docking station to start the program on your board
The magnitude values for the axis X, Y and Z will be displayed in real-time on the OLED Display.
main.cpp
- Committer:
- GregC
- Date:
- 2016-10-19
- Revision:
- 0:3fcdc27ab845
File content as of revision 0:3fcdc27ab845:
#include "mbed.h" #include "FXOS8700.h" #include "Hexi_OLED_SSD1351.h" #include "images.h" #include "string.h" // Pin connections DigitalOut led1(LED_GREEN); // RGB LED Serial pc(USBTX, USBRX); // Serial interface FXOS8700 mag(PTC11, PTC10); SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); // SSD1351 OLED Driver (MOSI,SCLK,POWER,CS,RST,DC) // Variables float mag_data[3]; // Storage for the data from the sensor float mag_rms=0.0; // RMS value from the sensor float mx, my, mz; // Integer value from the sensor to be displayed const uint8_t *image1; // Pointer for the image to be displayed char text1[20]; // Text Buffer for dynamic value displayed char text2[20]; // Text Buffer for dynamic value displayed char text3[20]; // Text Buffer for dynamic value displayed int main() { // Configure Accelerometer FXOS8700, Magnetometer FXOS8700 mag.mag_config(); /* Setting pointer location of the 96 by 96 pixel bitmap */ image1 = Magneto; /* Turn on the backlight of the OLED Display */ // oled.DimScreenON(); /* Fill 96px by 96px Screen with 96px by 96px NXP Image starting at x=0,y=0 */ oled.DrawImage(image1,0,0); while (true) { mag.acquire_mag_data_uT(mag_data); mag_rms = sqrt(((mag_data[0]*mag_data[0])+(mag_data[1]*mag_data[1])+(mag_data[2]*mag_data[2]))/3); printf("Magnetometer \tX-Axis %4.2f \tY-Axis %4.2f \tZ-Axis %4.2f \tRMS %4.2f\n\n\r",mag_data[0],mag_data[1],mag_data[2],mag_rms); wait(0.01); mx = mag_data[0]; my = mag_data[1]; mz = mag_data[2]; /* Get OLED Class Default Text Properties */ oled_text_properties_t textProperties = {0}; oled.GetTextProperties(&textProperties); /* Set text properties to white and right aligned for the dynamic text */ textProperties.fontColor = COLOR_BLUE; textProperties.alignParam = OLED_TEXT_ALIGN_LEFT; oled.SetTextProperties(&textProperties); /* Display Legends */ strcpy((char *) text1,"X-Axis (uT):"); oled.Label((uint8_t *)text1,3,45); /* Format the value */ sprintf(text1,"%4.2f",mx); /* Display time reading in 35px by 15px textbox at(x=55, y=40) */ oled.TextBox((uint8_t *)text1,70,45,20,15); //Increase textbox for more digits /* Set text properties to white and right aligned for the dynamic text */ textProperties.fontColor = COLOR_GREEN; textProperties.alignParam = OLED_TEXT_ALIGN_LEFT; oled.SetTextProperties(&textProperties); /* Display Legends */ strcpy((char *) text2,"Y-Axis (uT):"); oled.Label((uint8_t *)text2,3,62); /* Format the value */ sprintf(text2,"%4.2f",my); /* Display time reading in 35px by 15px textbox at(x=55, y=40) */ oled.TextBox((uint8_t *)text2,70,62,20,15); //Increase textbox for more digits /* Set text properties to white and right aligned for the dynamic text */ textProperties.fontColor = COLOR_RED; textProperties.alignParam = OLED_TEXT_ALIGN_LEFT; oled.SetTextProperties(&textProperties); /* Display Legends */ strcpy((char *) text3,"Z-Axis (uT):"); oled.Label((uint8_t *)text3,3,79); /* Format the value */ sprintf(text3,"%4.2f",mz); /* Display time reading in 35px by 15px textbox at(x=55, y=40) */ oled.TextBox((uint8_t *)text3,70,79,20,15); //Increase textbox for more digits led1 = !led1; Thread::wait(250); } }