Zoltan Hudak / Mbed 2 deprecated STM32F103C8T6_AnalogIn

Reading analog input with an STM32F103C8T6 board. ADC is calibrated to achieve higher accuracy.

Dependencies:   mbed

Reading analog input with STM32F103C8T6 board

Import the program into your online compiler.

Schematic

/media/uploads/hudakz/stm32f103c8t6_aanalogin.png

main.cpp@0:5d7148c1f26a, 2017-11-18 (annotated)

Committer:
hudakz
Date:
Sat Nov 18 14:31:54 2017 +0000
Revision:
0:5d7148c1f26a
Child:
1:7522adef9bd0
Initial release.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:5d7148c1f26a 1 #include "stm32f103c8t6.h"
hudakz 0:5d7148c1f26a 2 #include "mbed.h"
hudakz 0:5d7148c1f26a 3 #include "AnalogInCal.h"
hudakz 0:5d7148c1f26a 4
hudakz 0:5d7148c1f26a 5 const float REF_VOLT = 3300; // Reference voltage in milivolts
hudakz 0:5d7148c1f26a 6
hudakz 0:5d7148c1f26a 7 int main() {
hudakz 0:5d7148c1f26a 8 confSysClock(); //Configure system clock (72MHz HSE clock, 48MHz USB clock)
hudakz 0:5d7148c1f26a 9
hudakz 0:5d7148c1f26a 10 Serial pc(PA_2, PA_3);
hudakz 0:5d7148c1f26a 11 DigitalOut myled(LED1);
hudakz 0:5d7148c1f26a 12 // AnalogIn analogIn(PA_0); // Create an uncalibrated analog input
hudakz 0:5d7148c1f26a 13 AnalogInCal analogIn(PA_0); // Create an analog input with calibrated AD convertor
hudakz 0:5d7148c1f26a 14 float voltage;
hudakz 0:5d7148c1f26a 15
hudakz 0:5d7148c1f26a 16 while (1) {
hudakz 0:5d7148c1f26a 17 voltage = analogIn.read() * REF_VOLT; // convert analog to digital
hudakz 0:5d7148c1f26a 18 pc.printf("voltage = %.0f mV\r\n", voltage);
hudakz 0:5d7148c1f26a 19 myled = !myled;
hudakz 0:5d7148c1f26a 20 wait_ms(1000);
hudakz 0:5d7148c1f26a 21 }
hudakz 0:5d7148c1f26a 22 }
hudakz 0:5d7148c1f26a 23