start/stop button tricky at very low batt voltage

[iso14000]

Variant

TRANSPOTTER

Control type

None

Control mode

None

Description

Hi

not sure, but I would like to clarify a point :
after initialisastion stuff, we have the following :
// Loop until button is released while(HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN)) { HAL_Delay(10); }

meaning of cours , software is stuck until start button is released ...
BUTTON_PORT stands for PORT A and BUtTON_PIN for Pin 0X2 meaning PA1

right...

on the schematic , this pin is connected to AIN_V_BATT , meaning it could be used for Vbatt analog monitoring

voltage divider is made around R3 and R1, so scale factor is 2/32 0.0625 , so to reach a high level, let's say 2V (roughtly for 3.3V IO voltage) the battery voltage should be above 2V/0.0625 =>32V ....

so if by accident, like I did, you remove all battery safety cut of for testing purpose, when power voltage goes down to 32V, you will be forgiven to switch off the system....

gasp! I think will change R3 slightly......