Hexiwear / Mbed OS Hexi_Click_AirQuality_Example

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   Hexi_KW40Z Hexi_OLED_SSD1351

main.cpp@3:97bc87323258, 2016-11-04 (annotated)

Committer:
GregC
Date:
Fri Nov 04 23:11:29 2016 +0000
Revision:
3:97bc87323258
Parent:
2:8e7d89c2cbde 
Very advanced Click Air Quality example for Hexiwear featuring OLED Display, Bluetooth, Cloud and Touch

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daveyclk 2:8e7d89c2cbde 1
daveyclk 2:8e7d89c2cbde 2
GregC 0:4cf89612afab 3 /******************************************************************************
GregC 0:4cf89612afab 4 * Includes
GregC 0:4cf89612afab 5 *******************************************************************************/
GregC 0:4cf89612afab 6
GregC 0:4cf89612afab 7 #include "mbed.h"
GregC 0:4cf89612afab 8 #include "Hexi_OLED_SSD1351.h"
GregC 3:97bc87323258 9 #include "Hexi_KW40Z.h"
GregC 0:4cf89612afab 10 #include "images.h"
daveyclk 2:8e7d89c2cbde 11 #include "new_images.h"
GregC 0:4cf89612afab 12 #include "string.h"
daveyclk 2:8e7d89c2cbde 13 #include "stdbool.h"
GregC 0:4cf89612afab 14
GregC 0:4cf89612afab 15 /******************************************************************************
GregC 0:4cf89612afab 16 * Input and Output Pinout
GregC 0:4cf89612afab 17 *******************************************************************************/
GregC 0:4cf89612afab 18
GregC 0:4cf89612afab 19 AnalogIn ain(PTB2);
GregC 0:4cf89612afab 20 SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); // SSD1351 OLED Driver (MOSI,SCLK,POWER,CS,RST,DC)
GregC 3:97bc87323258 21 KW40Z kw40z_device(PTE24, PTE25); // Instantiate the Hexi KW40Z Driver (UART TX, UART RX)
GregC 3:97bc87323258 22 DigitalOut blueLed(LED3,1);
GregC 0:4cf89612afab 23 Serial pc(USBTX, USBRX);
GregC 0:4cf89612afab 24
GregC 3:97bc87323258 25 Thread txThread;
GregC 3:97bc87323258 26
GregC 3:97bc87323258 27 /******************************************************************************
GregC 3:97bc87323258 28 * prototypes
GregC 3:97bc87323258 29 *******************************************************************************/
GregC 3:97bc87323258 30 void InitModules();
GregC 3:97bc87323258 31 void ReadSensor();
GregC 3:97bc87323258 32 void CalculatePPM();
GregC 3:97bc87323258 33 void DisplayAirQValue(uint16_t value);
GregC 3:97bc87323258 34
GregC 3:97bc87323258 35
GregC 0:4cf89612afab 36 /******************************************************************************
GregC 0:4cf89612afab 37 * Module Variable Definitions
GregC 0:4cf89612afab 38 *******************************************************************************/
GregC 0:4cf89612afab 39
GregC 3:97bc87323258 40 uint16_t ppm;
GregC 0:4cf89612afab 41
GregC 3:97bc87323258 42 uint16_t value = 0;
GregC 3:97bc87323258 43 uint16_t value_old = 0;
GregC 0:4cf89612afab 44 uint16_t adc_rd;
GregC 0:4cf89612afab 45
daveyclk 2:8e7d89c2cbde 46 //const uint8_t *image1; // old cover image
daveyclk 2:8e7d89c2cbde 47 const uint8_t *green_arrow; // Pointer for the image to be displayed
daveyclk 2:8e7d89c2cbde 48 const uint8_t *yellow_arrow; // Pointer for the image to be displayed
daveyclk 2:8e7d89c2cbde 49 const uint8_t *orange_arrow; // Pointer for the image to be displayed
daveyclk 2:8e7d89c2cbde 50 const uint8_t *red_arrow; // Pointer for the image to be displayed
daveyclk 2:8e7d89c2cbde 51 const uint8_t *purple_arrow; // Pointer for the image to be displayed
daveyclk 2:8e7d89c2cbde 52
daveyclk 2:8e7d89c2cbde 53 char text[20]; // Text Buffer for dynamic value displayed
daveyclk 2:8e7d89c2cbde 54
daveyclk 2:8e7d89c2cbde 55 bool test = false; // used to put the program in text mode to check images
GregC 0:4cf89612afab 56
GregC 3:97bc87323258 57 /**************************************************************************************************
GregC 3:97bc87323258 58 * Call Back Functions
GregC 3:97bc87323258 59 **************************************************************************************************/
GregC 3:97bc87323258 60
GregC 3:97bc87323258 61 void ButtonRight(void)
GregC 3:97bc87323258 62 {
GregC 3:97bc87323258 63 kw40z_device.ToggleAdvertisementMode();
GregC 3:97bc87323258 64 }
GregC 3:97bc87323258 65
GregC 3:97bc87323258 66 void ButtonLeft(void)
GregC 3:97bc87323258 67 {
GregC 3:97bc87323258 68 kw40z_device.ToggleAdvertisementMode();
GregC 3:97bc87323258 69 }
GregC 3:97bc87323258 70
GregC 3:97bc87323258 71 void PassKey(void)
GregC 3:97bc87323258 72 {
GregC 3:97bc87323258 73 /* Display Bond Pass Key in a 95px by 18px textbox at x=0,y=40 */
GregC 3:97bc87323258 74 sprintf(text,"%d", kw40z_device.GetPassKey());
GregC 3:97bc87323258 75 oled.TextBox((uint8_t *)text,0,72,95,18);
GregC 3:97bc87323258 76 }
GregC 3:97bc87323258 77
GregC 3:97bc87323258 78
GregC 3:97bc87323258 79
GregC 3:97bc87323258 80 /**************************************************************************************************
GregC 3:97bc87323258 81 * Function Main()
GregC 3:97bc87323258 82 * -------------------------------------------------------------------------------------------------
GregC 3:97bc87323258 83 * Overview:
GregC 3:97bc87323258 84 * Input: None
GregC 3:97bc87323258 85 * Output: None
GregC 3:97bc87323258 86 **************************************************************************************************/
GregC 3:97bc87323258 87
GregC 3:97bc87323258 88 int main()
GregC 3:97bc87323258 89 {
GregC 3:97bc87323258 90
GregC 3:97bc87323258 91 InitModules();
GregC 3:97bc87323258 92
GregC 3:97bc87323258 93 while (true)
GregC 3:97bc87323258 94 {
GregC 3:97bc87323258 95
GregC 3:97bc87323258 96 ReadSensor();
GregC 3:97bc87323258 97 pc.printf("Sensor Value 0x%04X\n\r",ain.read_u16());
GregC 3:97bc87323258 98
GregC 3:97bc87323258 99 blueLed = !kw40z_device.GetAdvertisementMode(); /*Indicate BLE Advertisment Mode*/
GregC 3:97bc87323258 100
GregC 3:97bc87323258 101
GregC 3:97bc87323258 102 CalculatePPM();
GregC 3:97bc87323258 103 DisplayAirQValue(ppm);
GregC 3:97bc87323258 104
GregC 3:97bc87323258 105 Thread::wait(500);
GregC 3:97bc87323258 106
GregC 3:97bc87323258 107 }
GregC 3:97bc87323258 108 }
GregC 3:97bc87323258 109
GregC 3:97bc87323258 110 /**************************************************************************************************
GregC 3:97bc87323258 111 * Function TxTask()
GregC 3:97bc87323258 112 **************************************************************************************************/
GregC 3:97bc87323258 113
GregC 3:97bc87323258 114 void txTask(void){
GregC 3:97bc87323258 115
GregC 3:97bc87323258 116 while (true)
GregC 3:97bc87323258 117 {
GregC 3:97bc87323258 118
GregC 3:97bc87323258 119 /*Notify Hexiwear App that it is running Sensor Tag mode*/
GregC 3:97bc87323258 120 kw40z_device.SendSetApplicationMode(GUI_CURRENT_APP_SENSOR_TAG);
GregC 3:97bc87323258 121
GregC 3:97bc87323258 122 kw40z_device.SendPressure(10*ppm); //send ppm Air Quality Click value
GregC 3:97bc87323258 123
GregC 3:97bc87323258 124 Thread::wait(1000);
GregC 3:97bc87323258 125 }
GregC 3:97bc87323258 126 }
GregC 0:4cf89612afab 127
GregC 0:4cf89612afab 128 /**************************************************************************************************
GregC 0:4cf89612afab 129 * Function InitModules()
GregC 0:4cf89612afab 130 * -------------------------------------------------------------------------------------------------
GregC 0:4cf89612afab 131 * Overview:
GregC 0:4cf89612afab 132 * Input: None
GregC 0:4cf89612afab 133 * Output: None
GregC 0:4cf89612afab 134 **************************************************************************************************/
GregC 0:4cf89612afab 135
GregC 0:4cf89612afab 136 void InitModules()
GregC 0:4cf89612afab 137 {
daveyclk 2:8e7d89c2cbde 138 //image1 = AirQuality; // Setting pointer location of the 96 by 96 pixel bitmap
daveyclk 2:8e7d89c2cbde 139 //oled.DrawImage(image1,0,0); // Fill 96px by 96px Screen with 96px by 96px NXP Image starting at x=0,y=0
daveyclk 2:8e7d89c2cbde 140
daveyclk 2:8e7d89c2cbde 141 green_arrow = Green_arrow_bmp; // Setting pointer location of the 96 by 96 pixel bitmap Arrow Point to Green To begin
daveyclk 2:8e7d89c2cbde 142 yellow_arrow = Yellow_arrow_bmp; // Setting pointer location of the 96 by 96 pixel bitmap
daveyclk 2:8e7d89c2cbde 143 orange_arrow = Orange_arrow_bmp; // Setting pointer location of the 96 by 96 pixel bitmap
daveyclk 2:8e7d89c2cbde 144 red_arrow = Red_arrow_bmp; // Setting pointer location of the 96 by 96 pixel bitmap
daveyclk 2:8e7d89c2cbde 145 purple_arrow = Purple_arrow_bmp; // Setting pointer location of the 96 by 96 pixel bitmap
daveyclk 2:8e7d89c2cbde 146
daveyclk 2:8e7d89c2cbde 147 oled.DrawImage(green_arrow,0,0); // Fill 96px by 96px Screen with 96px by 96px NXP Image starting at x=0,y=0
GregC 0:4cf89612afab 148
GregC 0:4cf89612afab 149 oled_text_properties_t textProperties = {0}; // Get OLED Class Default Text Properties
GregC 0:4cf89612afab 150 oled.GetTextProperties(&textProperties);
GregC 3:97bc87323258 151
GregC 3:97bc87323258 152 /* Register callbacks to application functions */
GregC 3:97bc87323258 153 kw40z_device.attach_buttonLeft(&ButtonLeft);
GregC 3:97bc87323258 154 kw40z_device.attach_buttonRight(&ButtonRight);
GregC 3:97bc87323258 155 kw40z_device.attach_passkey(&PassKey);
GregC 0:4cf89612afab 156
daveyclk 2:8e7d89c2cbde 157 //PPM text now in the Bitmap
daveyclk 2:8e7d89c2cbde 158
daveyclk 2:8e7d89c2cbde 159 //textProperties.fontColor = COLOR_BLUE; // Set text properties to white and right aligned for the dynamic text
daveyclk 2:8e7d89c2cbde 160 //textProperties.alignParam = OLED_TEXT_ALIGN_LEFT;
daveyclk 2:8e7d89c2cbde 161 //oled.SetTextProperties(&textProperties);
GregC 0:4cf89612afab 162
daveyclk 2:8e7d89c2cbde 163 //strcpy((char *) text,"ppm:"); // Display Legends
daveyclk 2:8e7d89c2cbde 164 // oled.Label((uint8_t *)text,15,75);
GregC 0:4cf89612afab 165
daveyclk 2:8e7d89c2cbde 166 textProperties.fontColor = COLOR_WHITE; // Set text properties to white and right aligned for the dynamic text
GregC 0:4cf89612afab 167 textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
GregC 0:4cf89612afab 168 oled.SetTextProperties(&textProperties);
GregC 0:4cf89612afab 169
GregC 0:4cf89612afab 170 sprintf(text,"%i",value); // Format the value
daveyclk 2:8e7d89c2cbde 171 oled.TextBox((uint8_t *)text,55,76,20,15); //Increase textbox for more digits
GregC 3:97bc87323258 172
GregC 3:97bc87323258 173 txThread.start(txTask); /*Start transmitting Sensor Tag Data */
GregC 0:4cf89612afab 174
GregC 0:4cf89612afab 175 }
GregC 0:4cf89612afab 176
GregC 0:4cf89612afab 177
GregC 0:4cf89612afab 178 /**************************************************************************************************
GregC 0:4cf89612afab 179 * Function ReadSensor()
GregC 0:4cf89612afab 180 * -------------------------------------------------------------------------------------------------
GregC 0:4cf89612afab 181 * Overview: Read sensor.
GregC 0:4cf89612afab 182 * Input: None
GregC 0:4cf89612afab 183 * Output: None
GregC 0:4cf89612afab 184 **************************************************************************************************/
GregC 0:4cf89612afab 185
GregC 0:4cf89612afab 186 void ReadSensor()
GregC 0:4cf89612afab 187 {
GregC 0:4cf89612afab 188 adc_rd = ain.read_u16();
GregC 0:4cf89612afab 189 wait_ms(10);
GregC 0:4cf89612afab 190 }
GregC 0:4cf89612afab 191
GregC 0:4cf89612afab 192
GregC 0:4cf89612afab 193 /**************************************************************************************************
GregC 0:4cf89612afab 194 * Function CalculatePPM()
GregC 0:4cf89612afab 195 * -------------------------------------------------------------------------------------------------
GregC 0:4cf89612afab 196 * Overview: Calculation of PPM.
GregC 0:4cf89612afab 197 * Input: None
GregC 0:4cf89612afab 198 * Output: None
GregC 0:4cf89612afab 199 **************************************************************************************************/
GregC 0:4cf89612afab 200
GregC 0:4cf89612afab 201 void CalculatePPM()
GregC 0:4cf89612afab 202 {
GregC 0:4cf89612afab 203 const double Rl = 5000.0; // Rl (Ohm) - Load resistance
daveyclk 1:7b9c19276087 204 const double Vadc_33 = 0.0000503548; // ADC step 3,3V/65535 0.00503mV (16bit ADC)
GregC 0:4cf89612afab 205 double Vrl; // Output voltage
GregC 0:4cf89612afab 206 double Rs; // Rs (Ohm) - Sensor resistance
GregC 0:4cf89612afab 207 double ratio; // Rs/Rl ratio
GregC 0:4cf89612afab 208 double lgPPM;
GregC 0:4cf89612afab 209
GregC 0:4cf89612afab 210 Vrl = (double)adc_rd * Vadc_33; // For 3.3V Vcc use Vadc_33
daveyclk 1:7b9c19276087 211 Rs = Rl * (3.3 - Vrl)/Vrl; // Calculate sensor resistance
GregC 0:4cf89612afab 212 ratio = Rs/Rl; // Calculate ratio
GregC 0:4cf89612afab 213 lgPPM = (log10(ratio) * -0.8) + 0.9; // Calculate ppm
GregC 3:97bc87323258 214 ppm = 6* pow(10,lgPPM); // Calculate ppm
GregC 0:4cf89612afab 215 }
GregC 0:4cf89612afab 216
GregC 0:4cf89612afab 217
GregC 0:4cf89612afab 218
GregC 0:4cf89612afab 219 /**************************************************************************************************
GregC 0:4cf89612afab 220 * Function DisplayAirQValue()
GregC 0:4cf89612afab 221 * -------------------------------------------------------------------------------------------------
GregC 0:4cf89612afab 222 * Overview:
GregC 0:4cf89612afab 223 * Input: None
GregC 0:4cf89612afab 224 * Output: None
GregC 0:4cf89612afab 225 **************************************************************************************************/
GregC 0:4cf89612afab 226
GregC 3:97bc87323258 227 void DisplayAirQValue(uint16_t value )
GregC 0:4cf89612afab 228 {
GregC 0:4cf89612afab 229 if (value_old != value)
GregC 0:4cf89612afab 230 {
GregC 0:4cf89612afab 231
daveyclk 2:8e7d89c2cbde 232 if( value > 200)
daveyclk 2:8e7d89c2cbde 233 oled.DrawImage(purple_arrow,0,0); // Fill 96px by 96px Screen with 96px by 96px NXP Image starting at x=0,y=0
daveyclk 2:8e7d89c2cbde 234 else if (value < 200 && value > 150)
daveyclk 2:8e7d89c2cbde 235 oled.DrawImage(red_arrow,0,0);
daveyclk 2:8e7d89c2cbde 236 else if (value < 150 && value > 100)
daveyclk 2:8e7d89c2cbde 237 oled.DrawImage(orange_arrow,0,0);
daveyclk 2:8e7d89c2cbde 238 else if (value < 100 && value > 50)
daveyclk 2:8e7d89c2cbde 239 oled.DrawImage(yellow_arrow,0,0);
daveyclk 2:8e7d89c2cbde 240 else
daveyclk 2:8e7d89c2cbde 241 oled.DrawImage(green_arrow,0,0);
daveyclk 2:8e7d89c2cbde 242
GregC 0:4cf89612afab 243 oled_text_properties_t textProperties = {0}; // Get OLED Class Default Text Properties
GregC 0:4cf89612afab 244 oled.GetTextProperties(&textProperties);
GregC 0:4cf89612afab 245
GregC 0:4cf89612afab 246 // clear the previous value
GregC 0:4cf89612afab 247 textProperties.fontColor = COLOR_WHITE; // Set text properties to white and right aligned for the dynamic text
GregC 0:4cf89612afab 248 textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
GregC 0:4cf89612afab 249 oled.SetTextProperties(&textProperties);
GregC 0:4cf89612afab 250
GregC 0:4cf89612afab 251 sprintf(text,"%i",value_old); // Format the value
daveyclk 2:8e7d89c2cbde 252 oled.TextBox((uint8_t *)text,55,76,20,15); //Increase textbox for more digits
GregC 0:4cf89612afab 253
GregC 0:4cf89612afab 254 // display the new value
GregC 0:4cf89612afab 255 textProperties.fontColor = COLOR_WHITE; // Set text properties to white and right aligned for the dynamic text
GregC 0:4cf89612afab 256 textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
GregC 0:4cf89612afab 257 oled.SetTextProperties(&textProperties);
GregC 0:4cf89612afab 258
GregC 0:4cf89612afab 259 sprintf(text,"%i",value); // Format the value
daveyclk 2:8e7d89c2cbde 260 oled.TextBox((uint8_t *)text,55,76,20,15); //Increase textbox for more digits
GregC 0:4cf89612afab 261 }
GregC 0:4cf89612afab 262 value_old = value;
GregC 0:4cf89612afab 263 }