Hexiwear / Mbed OS Hexi_Accelero-v2_Example

Advanced accelerometer program example for Hexiwear featuring OLED Display

Dependencies:   FXOS8700 Hexi_OLED_SSD1351

This project demonstrates the use of the FXOS8700CQ Accelerometer sensor embedded in Hexiwear

Compile the project and copy the binary "Hexi_Accelero-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 value of the linear acceleration for the axis X, Y and Z will be displayed in real-time on the OLED Display.

main.cpp@0:68865a21b70d, 2016-10-19 (annotated)

Committer:
GregC
Date:
Wed Oct 19 22:51:43 2016 +0000
Revision:
0:68865a21b70d
Advanced accelerometer program example for Hexiwear featuring OLED Display

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GregC 0:68865a21b70d 1 #include "mbed.h"
GregC 0:68865a21b70d 2 #include "FXOS8700.h"
GregC 0:68865a21b70d 3 #include "Hexi_OLED_SSD1351.h"
GregC 0:68865a21b70d 4 #include "images.h"
GregC 0:68865a21b70d 5 #include "string.h"
GregC 0:68865a21b70d 6
GregC 0:68865a21b70d 7 // Pin connections
GregC 0:68865a21b70d 8 DigitalOut led1(LED_GREEN); // RGB LED
GregC 0:68865a21b70d 9 Serial pc(USBTX, USBRX); // Serial interface
GregC 0:68865a21b70d 10 FXOS8700 accel(PTC11, PTC10);
GregC 0:68865a21b70d 11 SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); // SSD1351 OLED Driver (MOSI,SCLK,POWER,CS,RST,DC)
GregC 0:68865a21b70d 12
GregC 0:68865a21b70d 13 // Variables
GregC 0:68865a21b70d 14 float accel_data[3]; // Storage for the data from the sensor
GregC 0:68865a21b70d 15 float accel_rms=0.0; // RMS value from the sensor
GregC 0:68865a21b70d 16 float ax, ay, az; // Integer value from the sensor to be displayed
GregC 0:68865a21b70d 17 const uint8_t *image1; // Pointer for the image1 to be displayed
GregC 0:68865a21b70d 18 char text1[20]; // Text Buffer for dynamic value displayed
GregC 0:68865a21b70d 19 char text2[20]; // Text Buffer for dynamic value displayed
GregC 0:68865a21b70d 20 char text3[20]; // Text Buffer for dynamic value displayed
GregC 0:68865a21b70d 21
GregC 0:68865a21b70d 22 int main() {
GregC 0:68865a21b70d 23
GregC 0:68865a21b70d 24 // Configure Accelerometer FXOS8700, Magnetometer FXOS8700
GregC 0:68865a21b70d 25 accel.accel_config();
GregC 0:68865a21b70d 26
GregC 0:68865a21b70d 27 // Setting pointer location of the 96 by 96 pixel bitmap
GregC 0:68865a21b70d 28 image1 = Accelero;
GregC 0:68865a21b70d 29
GregC 0:68865a21b70d 30 // Dimm Down OLED backlight
GregC 0:68865a21b70d 31 // oled.DimScreenON();
GregC 0:68865a21b70d 32
GregC 0:68865a21b70d 33 // Fill 96px by 96px Screen with 96px by 96px Image starting at x=0,y=0
GregC 0:68865a21b70d 34 oled.DrawImage(image1,0,0);
GregC 0:68865a21b70d 35
GregC 0:68865a21b70d 36
GregC 0:68865a21b70d 37 while (true)
GregC 0:68865a21b70d 38 {
GregC 0:68865a21b70d 39
GregC 0:68865a21b70d 40 accel.acquire_accel_data_g(accel_data);
GregC 0:68865a21b70d 41 accel_rms = sqrt(((accel_data[0]*accel_data[0])+(accel_data[1]*accel_data[1])+(accel_data[2]*accel_data[2]))/3);
GregC 0:68865a21b70d 42 printf("Accelerometer \tX-Axis %4.2f \tY-Axis %4.2f \tZ-Axis %4.2f \tRMS %4.2f\n\r",accel_data[0],accel_data[1],accel_data[2],accel_rms);
GregC 0:68865a21b70d 43 wait(0.01);
GregC 0:68865a21b70d 44 ax = accel_data[0];
GregC 0:68865a21b70d 45 ay = accel_data[1];
GregC 0:68865a21b70d 46 az = accel_data[2];
GregC 0:68865a21b70d 47
GregC 0:68865a21b70d 48 /* Get OLED Class Default Text Properties */
GregC 0:68865a21b70d 49 oled_text_properties_t textProperties = {0};
GregC 0:68865a21b70d 50 oled.GetTextProperties(&textProperties);
GregC 0:68865a21b70d 51
GregC 0:68865a21b70d 52 /* Set text properties to white and right aligned for the dynamic text */
GregC 0:68865a21b70d 53 textProperties.fontColor = COLOR_BLUE;
GregC 0:68865a21b70d 54 textProperties.alignParam = OLED_TEXT_ALIGN_LEFT;
GregC 0:68865a21b70d 55 oled.SetTextProperties(&textProperties);
GregC 0:68865a21b70d 56
GregC 0:68865a21b70d 57 /* Display Legends */
GregC 0:68865a21b70d 58 strcpy((char *) text1,"X-Axis (g):");
GregC 0:68865a21b70d 59 oled.Label((uint8_t *)text1,3,45);
GregC 0:68865a21b70d 60
GregC 0:68865a21b70d 61 /* Format the value */
GregC 0:68865a21b70d 62 sprintf(text1,"%4.2f",ax);
GregC 0:68865a21b70d 63 /* Display time reading in 35px by 15px textbox at(x=55, y=40) */
GregC 0:68865a21b70d 64 oled.TextBox((uint8_t *)text1,70,45,20,15); //Increase textbox for more digits
GregC 0:68865a21b70d 65
GregC 0:68865a21b70d 66 /* Set text properties to white and right aligned for the dynamic text */
GregC 0:68865a21b70d 67 textProperties.fontColor = COLOR_GREEN;
GregC 0:68865a21b70d 68 textProperties.alignParam = OLED_TEXT_ALIGN_LEFT;
GregC 0:68865a21b70d 69 oled.SetTextProperties(&textProperties);
GregC 0:68865a21b70d 70
GregC 0:68865a21b70d 71 /* Display Legends */
GregC 0:68865a21b70d 72 strcpy((char *) text2,"Y-Axis (g):");
GregC 0:68865a21b70d 73 oled.Label((uint8_t *)text2,3,62);
GregC 0:68865a21b70d 74
GregC 0:68865a21b70d 75 /* Format the value */
GregC 0:68865a21b70d 76 sprintf(text2,"%4.2f",ay);
GregC 0:68865a21b70d 77 /* Display time reading in 35px by 15px textbox at(x=55, y=40) */
GregC 0:68865a21b70d 78 oled.TextBox((uint8_t *)text2,70,62,20,15); //Increase textbox for more digits
GregC 0:68865a21b70d 79
GregC 0:68865a21b70d 80 /* Set text properties to white and right aligned for the dynamic text */
GregC 0:68865a21b70d 81 textProperties.fontColor = COLOR_RED;
GregC 0:68865a21b70d 82 textProperties.alignParam = OLED_TEXT_ALIGN_LEFT;
GregC 0:68865a21b70d 83 oled.SetTextProperties(&textProperties);
GregC 0:68865a21b70d 84
GregC 0:68865a21b70d 85 /* Display Legends */
GregC 0:68865a21b70d 86 strcpy((char *) text3,"Z-Axis (g):");
GregC 0:68865a21b70d 87 oled.Label((uint8_t *)text3,3,79);
GregC 0:68865a21b70d 88
GregC 0:68865a21b70d 89 /* Format the value */
GregC 0:68865a21b70d 90 sprintf(text3,"%4.2f",az);
GregC 0:68865a21b70d 91 /* Display time reading in 35px by 15px textbox at(x=55, y=40) */
GregC 0:68865a21b70d 92 oled.TextBox((uint8_t *)text3,70,79,20,15); //Increase textbox for more digits
GregC 0:68865a21b70d 93
GregC 0:68865a21b70d 94 led1 = !led1;
GregC 0:68865a21b70d 95 Thread::wait(250);
GregC 0:68865a21b70d 96 }
GregC 0:68865a21b70d 97 }