SmartCampus
display a graph of temperature from the NTC on the OLED
Dependencies: SSD1308_128x64_I2C Grove_temperature
Revision 0:50a79669d4e7, committed 2019-12-11
- Comitter:
- dcj001
- Date:
- Wed Dec 11 16:38:09 2019 +0000
- Commit message:
- display a graph of temperature from the NTC on the OLED
Changed in this revision
diff -r 000000000000 -r 50a79669d4e7 Grove_temperature.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Grove_temperature.lib Wed Dec 11 16:38:09 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/MACRUM/code/Grove_temperature/#aee37a51ccbb
diff -r 000000000000 -r 50a79669d4e7 SSD1308_128x64_I2C.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SSD1308_128x64_I2C.lib Wed Dec 11 16:38:09 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/wim/code/SSD1308_128x64_I2C/#e564cde8e03e
diff -r 000000000000 -r 50a79669d4e7 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Dec 11 16:38:09 2019 +0000
@@ -0,0 +1,84 @@
+#include "mbed.h"
+#include "SSD1308.h"
+#include "wave.h"
+#include "Grove_temperature.h"
+
+#define NUM_TEMP 64 //The number of points that will be displayed on the OLED
+
+AnalogIn varRes(A3); //variable resistor
+Grove_temperature temp_obj(A1); //Create a Crove_temperature object named "temp_obj", it's connected to Pin A1.
+I2C i2c(PB_9,PB_8); //The OLED uses port I2C to connect to the L073RZ
+SSD1308 oled = SSD1308(&i2c, SSD1308_SA0);
+
+void tempArrayInit(Temperature *p); //temperature struct initialization
+void tempArrayRefresh(Temperature *p); //temperature struct refresh
+void tempArrayDisplayOnOLED(Temperature *p);//temperature struct display the point on the OLED
+
+int main() {
+ Temperature t[NUM_TEMP]; //temperature array
+ char buffer[10]; //store a string
+ int interval; //refresh time
+
+ tempArrayInit(t); //temperature array initialization
+ oled.clearDisplay();
+ while(1){
+ interval = (int)(varRes.read() * 200); //variable resistor control the refresh speed
+ wait_ms(interval);
+
+ tempArrayRefresh(t); //refresh the array
+ tempArrayDisplayOnOLED(t); //display the pixel about the tempearture
+
+ sprintf(buffer," T:%2dC",t[NUM_TEMP - 1].u8_temperature); //sprintf the temperature to the buffer
+ oled.writeString(3,8,buffer);
+// sprintf(buffer," t:%3dms",interval); //sprintf the temperature to the buffer
+// oled.writeString(5,8,buffer);
+ }
+}
+
+void tempArrayInit(Temperature *p)
+{
+ uint8_t i;
+ for(i = 0;i < NUM_TEMP;i++){
+ p[i].u8_col = i;
+ p[i].u8_temperature = i % 64;
+ }
+}
+void tempArrayRefresh(Temperature *p)
+{
+ //refresh array
+ uint8_t i;
+ for(i = 0;i < (NUM_TEMP - 1);i++){
+ p[i].u8_page = p[i + 1].u8_page;
+ //don't refresh the column
+ //p[i].u8_col = p[i + 1].u8_col;
+ p[i].u8_temperature = p[i + 1].u8_temperature;
+ p[i].u8_value = p[i + 1].u8_value;
+ }
+
+ //get new value
+ p[NUM_TEMP - 1].u8_temperature = (uint8_t)(temp_obj.getTemperature());
+
+ //calculate value
+ p[NUM_TEMP - 1].calcPage();
+ p[NUM_TEMP - 1].calcValue();
+}
+
+void tempArrayDisplayOnOLED(Temperature *p)
+{
+ uint8_t i;
+
+ for(i = 0;i < NUM_TEMP;i++){
+
+ oled.writeBitmap(&p[i].u8_value,p[i].u8_page,p[i].u8_page,p[i].u8_col,p[i].u8_col);
+ /* clear the data on other pages withins the same column*/
+ for(uint8_t j = 0;j < 8;j++){
+ if(j == p[i].u8_page){
+ continue;
+ }
+ else{
+ oled.writeBitmap(0,j,j,p[i].u8_col,p[i].u8_col);
+ }
+ }
+
+ }
+}
\ No newline at end of file
diff -r 000000000000 -r 50a79669d4e7 mbed-os.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Wed Dec 11 16:38:09 2019 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#a1c0840b3d69060e5eb708edb18358e424a40f51
diff -r 000000000000 -r 50a79669d4e7 mysource/wave.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mysource/wave.cpp Wed Dec 11 16:38:09 2019 +0000
@@ -0,0 +1,29 @@
+#include "wave.h"
+
+Temperature::Temperature(void)
+{
+ u8_page = 7;
+ u8_col = 127;
+ u8_temperature = 0;
+ u8_value = 0;
+}
+
+Temperature::~Temperature(void)
+{
+
+}
+
+void Temperature::calcPage(void) //calculate the display page of this temperature
+{
+ uint8_t tmp;
+ tmp = u8_temperature / 8;
+ u8_page = 7 - tmp; //7 - tmp
+}
+
+void Temperature::calcValue(void) //calculate the I2C value of this temperature
+{
+ uint8_t index;
+
+ index = 7 - ( u8_temperature % 8 );
+ u8_value = (0x01) << index;
+}
\ No newline at end of file
diff -r 000000000000 -r 50a79669d4e7 mysource/wave.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mysource/wave.h Wed Dec 11 16:38:09 2019 +0000
@@ -0,0 +1,19 @@
+#ifndef WAVE_H
+#define WAVE_H
+
+#include "mbed.h"
+
+class Temperature{
+public:
+ Temperature();
+ ~Temperature();
+ void calcPage(void);
+ void calcValue(void);
+
+ uint8_t u8_page; // 0 ~ 7 The display page
+ uint8_t u8_col; // 0 ~127
+ uint8_t u8_temperature; // 0 ~ 64
+ uint8_t u8_value; //I2c data that will be sent to I2C
+};
+
+#endif
\ No newline at end of file