Coding a little battery tester using ADC and a QAPASS 1602A screen
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main.cpp
00001 #include "mbed.h" 00002 #include "TextLCD.h" 00003 00004 AnalogIn analog_value(A0); 00005 Serial pc(USBTX, USBRX); 00006 00007 DigitalOut led(LED1); 00008 TextLCD LCD(PA_0,PA_1,PA_4,PB_0,PC_1,PC_0); 00009 00010 int main() 00011 { 00012 float meas_r; 00013 float meas_v; 00014 00015 LCD.printf("HelloWorld"); 00016 00017 pc.printf("\n\rAnalogIn example\n\r"); 00018 00019 while(1) 00020 { 00021 00022 meas_r = analog_value.read(); // Read the analog input value (value from 0.0 to 1.0 = full ADC conversion range) 00023 meas_v = meas_r * 3300; // Converts value in the 0V-3.3V range 00024 00025 // Display values 00026 pc.printf("measure = %f = %.0f mV\n\r", meas_r, meas_v); 00027 LCD.locate(0,1); 00028 LCD.printf("Tension = %f mV", meas_v); 00029 // LED is ON is the value is below 1V 00030 if (meas_v < 1000) 00031 { 00032 led = 1; // LED ON 00033 } 00034 else 00035 { 00036 led = 0; // LED OFF 00037 } 00038 00039 wait(1.0); // 1 second 00040 } 00041 00042 return 0; 00043 }
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