Cannot use AnalogIn on MAX32625PICO

Mbed Studio
1

Hello, I am trying to use MAX32625PICO for the first time.
And trying to access analog input through “AnalogIn” API.
The compiler compiles the code without any error, and I can drag-and-drop the binary through usb.
But only thing that happens is the red LED flashes when unplugging and re-plugging the usb to run code, and green LED does not seem to turn on whatever an analog input.
My platform is Mbed Studio. And choose mbed os 5 when creating the project.
Here’s the actual code.


#include "mbed.h"

AnalogIn ain(AIN_0);
DigitalOut gLED(LED2, LED_OFF);

int main()
{
    while (true)
    {
        float value = ain.read();
        gLED = (value > 0.5f);
        wait_us(10000);
    }
}
2

Hi,

I don’t have an MAX32625PICO board. But according to the schematics here, the AIN_0 can be configured (see table 2 and 3).

Regards,
Toyo

3

Thank you.
This time I tried “Keil Studio” instead of “mbed studio”.
With Keil studio, the code below runs successfully without any error.
Maybe mbed studio still does not support MAX32625PICO?

#include "mbed.h"
#include "platform/mbed_thread.h"

int main() {

  AnalogIn ain0(AIN_0);
  DigitalOut rLED(LED1);

  while (true) {
    float value = ain0.read();
    rLED = value > 0.5f;
    thread_sleep_for((uint32_t)20);
  }
}
4

Hi,

I’ve used the MAX32630FTHR board which I believe it is very similar as the MAX32625PICO board. The blinky example for the Mbed OS 5.15.9 works fine with the Mbed Studio v1.45.
Please see the screenshot below.

スクリーンショット 2024-04-22 17.28.37
スクリーンショット 2024-04-22 17.28.372846×1884 478 KB

I touched/released the AIN_0 port by my finger for the AnalogIn test :slight_smile:

1 Like
5

Thank you for testing it with MAX32630FTHR.
I copy-pasted the code you provided me to my mbed studio, and now it worked!!

I really appreciate your advise!