main.cpp

00001 #include "mbed.h"
00002 #include "SSD1308.h"
00003 #include "wave.h"
00004 #include "Grove_temperature.h"
00005 
00006 #define NUM_TEMP 64 //The number of points that will be displayed on the OLED
00007 
00008 AnalogIn varRes(A3);    //variable resistor
00009 Grove_temperature temp_obj(A1);   //Create a Crove_temperature object named "temp_obj", it's connected to Pin  A1.
00010 I2C i2c(PB_9,PB_8);               //The OLED uses port I2C to connect to the L073RZ
00011 SSD1308 oled = SSD1308(&i2c, SSD1308_SA0);
00012 
00013 void tempArrayInit(Temperature *p);         //temperature struct initialization
00014 void tempArrayRefresh(Temperature *p);      //temperature struct refresh
00015 void tempArrayDisplayOnOLED(Temperature *p);//temperature struct display the point on the OLED
00016 
00017 int main() {
00018     Temperature t[NUM_TEMP];  //temperature array
00019     char buffer[10];          //store a string
00020     int interval;               //refresh time
00021              
00022     tempArrayInit(t);           //temperature array initialization
00023     oled.clearDisplay();
00024     while(1){
00025         interval = (int)(varRes.read() * 200);  //variable resistor control the refresh speed
00026         wait_ms(interval);        
00027         
00028         tempArrayRefresh(t);    //refresh the array
00029         tempArrayDisplayOnOLED(t);      //display the pixel about the tempearture
00030     
00031         sprintf(buffer," T:%2dC",t[NUM_TEMP - 1].u8_temperature);     //sprintf the temperature to the buffer
00032         oled.writeString(3,8,buffer);  
00033 //        sprintf(buffer," t:%3dms",interval);     //sprintf the temperature to the buffer
00034 //        oled.writeString(5,8,buffer);                
00035     }
00036 }
00037 
00038 void tempArrayInit(Temperature *p)
00039 {
00040     uint8_t i;
00041     for(i = 0;i < NUM_TEMP;i++){
00042         p[i].u8_col = i;
00043         p[i].u8_temperature = i % 64;
00044     }
00045 }
00046 void tempArrayRefresh(Temperature *p)
00047 {
00048     //refresh array
00049     uint8_t i;
00050     for(i = 0;i < (NUM_TEMP - 1);i++){
00051         p[i].u8_page = p[i + 1].u8_page;
00052         //don't refresh the column
00053         //p[i].u8_col = p[i + 1].u8_col;
00054         p[i].u8_temperature = p[i + 1].u8_temperature;
00055         p[i].u8_value = p[i + 1].u8_value;
00056     }
00057 
00058     //get new value
00059     p[NUM_TEMP - 1].u8_temperature = (uint8_t)(temp_obj.getTemperature());
00060     
00061     //calculate value
00062     p[NUM_TEMP - 1].calcPage();
00063     p[NUM_TEMP - 1].calcValue();
00064 }
00065 
00066 void tempArrayDisplayOnOLED(Temperature *p)
00067 {
00068     uint8_t i;
00069     
00070     for(i = 0;i < NUM_TEMP;i++){
00071         
00072         oled.writeBitmap(&p[i].u8_value,p[i].u8_page,p[i].u8_page,p[i].u8_col,p[i].u8_col);
00073         /* clear the data on other pages withins the same column*/
00074         for(uint8_t j = 0;j < 8;j++){
00075             if(j == p[i].u8_page){
00076                 continue;
00077             }    
00078             else{
00079                 oled.writeBitmap(0,j,j,p[i].u8_col,p[i].u8_col);
00080             }
00081         }
00082         
00083     }
00084 }