Hexiwear
Advanced temperature and humidity program example for Hexiwear featuring OLED Display
Dependencies: Hexi_OLED_SSD1351
This project demonstrates the use of the HTU21D temperature and humidity sensor embedded in Hexiwear
Compile the project and copy the binary "Hexi_Humid_Temp-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 temperature and the humidity values will be displayed in real-time on the OLED Display.
Diff: main.cpp
- Revision:
- 0:8bb615a783ed
diff -r 000000000000 -r 8bb615a783ed main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Oct 17 03:50:35 2016 +0000
@@ -0,0 +1,92 @@
+#include "mbed.h"
+#include "HTU21D.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
+HTU21D temphumid(PTB1,PTB0); // HTU21D Sensor
+DigitalOut powerEN (PTB12); // Power Enable HTU21D Sensor
+SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); // SSD1351 OLED Driver (MOSI,SCLK,POWER,CS,RST,DC)
+
+// Variables
+int sample_ftemp;
+int sample_ctemp;
+int sample_ktemp;
+int sample_humid;
+const uint8_t *image1; // Pointer for the image to be displayed
+char text[20]; // Text Buffer for dynamic value displayed
+
+int main() {
+ powerEN = 0;
+
+ /* Setting pointer location of the 96 by 96 pixel bitmap */
+ image1 = TempHumid;
+
+ /* 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) {
+
+ sample_ftemp = temphumid.sample_ftemp();
+ printf("Temperature: %d F\n\r", sample_ftemp);
+
+ sample_ctemp = temphumid.sample_ctemp();
+ printf("Temperature: %d C\n\r", sample_ctemp);
+
+ sample_ktemp = temphumid.sample_ktemp();
+ printf("Temperature: %d K\n\r", sample_ktemp);
+
+ sample_humid = temphumid.sample_humid();
+ printf("Humidity: %d %%\n\r", sample_humid);
+ printf("\n\r");
+
+ /* 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_RED;
+ textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
+ oled.SetTextProperties(&textProperties);
+
+ /* Display Legends */
+ strcpy((char *) text,"Temp.");
+ oled.Label((uint8_t *)text,5,67);
+
+ /* Format the value */
+ sprintf(text,"%i",sample_ctemp);
+ /* Display time reading in 35px by 15px textbox at(x=55, y=40) */
+ oled.TextBox((uint8_t *)text,57,67,20,15); //Increase textbox for more digits
+
+ /* Display Units */
+ strcpy((char *) text,"dC");
+ oled.Label((uint8_t *)text,82,67);
+
+ /* Set text properties to white and right aligned for the dynamic text */
+ textProperties.fontColor = COLOR_BLUE;
+ textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
+ oled.SetTextProperties(&textProperties);
+
+ /* Display Legends */
+ strcpy((char *) text,"Humidity");
+ oled.Label((uint8_t *)text,5,81);
+
+ /* Format the value */
+ sprintf(text,"%i",sample_humid);
+ /* Display time reading in 35px by 15px textbox at(x=55, y=40) */
+ oled.TextBox((uint8_t *)text,57,81,20,15); //Increase textbox for more digits
+
+ /* Display Units */
+ strcpy((char *) text,"%");
+ oled.Label((uint8_t *)text,82,81);
+
+ led1 = !led1;
+ Thread::wait(500);
+ }
+}