ADC Offset
Hello,
i ‘m using the library with FOC mode using a custom board with a STM32G474RE microcontroller, Hall sensor and 3 shunts for the phase current measurements. The maximum phase current will be about 28A. The shunts resistors are 1mohm. The voltage value is amplified by a INA with gain 20 and the voltage offset for zero current is 1.65V. Since the microcontroller VREF+ is very unstable and ADCs sometimes go crazy i decided to switch to the internal reference voltage set to 2.5V with successful results. The problem is that the motor control library uses a indecent constant, defined in the file mc_config.c without a define, set to 32767 as the offset for currente measurements. But 1.65/2.5*65536 is not equal to 32767. The workbench does not allow to set any offset. By changing manually that value it works! But changing values manually in a huge, chaotic and disorganized code is risky and error-prone. Is there any way to change these values safely?
Leonardo
