M41T62 driver error

[GWitt]

The M41T62 driver provided in STSW-M41T62 appears to have an error related to calibration of positive adjustments. Refer to the code below from line 750 of M41T62.c

The sign parameter is 0 or 1. To program the M41T62 for positive compensation requires programming the control register bit 5 with a logical 1. The code does not do this as it effects only bit 0 of the control register.

I suggest adding the following code at line 758:

sign = sign <<5;

M41T62_Error_et M41T62_Set_SignForCalibration(M41T62_SignCalibrationStatus_et sign)

{

 uint8_t tmp;

 M41T62_assert_param(IS_M41T62_CALIBRATION_SIGN(sign));

 if(M41T62_ReadRegs(M41T62_CALIBRATIONREG, 1, &tmp))

  return M41T62_ERROR;

 tmp &= ~M41T62_SIGN_CALIBRATION_MASK;

 tmp |= ((uint8_t)sign);

 if(M41T62_WriteRegs(M41T62_CALIBRATIONREG, 1, &tmp))

  return M41T62_ERROR;

 return M41T62_OK;

}

[Imen.D]

Hello @GWitt​ and welcome to the Community :)

Thanks for pointing out this issue.

I added the right topics "Analog and Audio" to your post in order to increase its chance to be reviewed by our Analog experts.

I will try to contact expert internally and I will come back to you with details.

Imen

[Imen.D]

Hi @GWitt​ ,

 I've heard back from the Analog team, and they said that the M41T62 driver has been discontinued and is unfortunately no longer supported by ST.

Thank you for your understanding.

Imen