CubeMX 5.1.0, stm32F303re, OPAMP4 dropdown box Follower-DAC_OUT1_INP. Code section:
hopamp4.Init.NonInvertingInput = OPAMP_NONINVERTINGINPUT_IO3;
is not correct, should be:
hopamp4.Init.NonInvertingInput = OPAMP_NONINVERTINGINPUT_IO2;
reference to stm32f3xx_hal_opamp.h
#define OPAMP_NONINVERTINGINPUT_IO0 OPAMP_CSR_VPSEL /*!< VP0 (PA1 for OPAMP1, VP0 PA7 for OPAMP2, VP0 PB0 for OPAMP3, VP0 PB13 for OPAMP4)
connected to OPAMPx non inverting input */
#define OPAMP_NONINVERTINGINPUT_IO1 (0x00000000U) /*!< VP1 (PA7 for OPAMP1, VP3 PD14 for OPAMP2, VP1 PB13 for OPAMP3, VP1 PD11 for OPAMP4)
connected to OPAMPx non inverting input */
#define OPAMP_NONINVERTINGINPUT_IO2 OPAMP_CSR_VPSEL_1 /*!< VP2 (PA3 for OPAMP1, VP2 PB0 for OPAMP2, VP2 PA1 for OPAMP3, VP3 PA4 for OPAMP4)
connected to OPAMPx non inverting input */
#define OPAMP_NONINVERTINGINPUT_IO3 OPAMP_CSR_VPSEL_0 /*!< VP3 (PA5 for OPAMP1, VP1 PB14 for OPAMP2, VP3 PA5 for OPAMP3, VP2 PB11 for OPAMP4)
where DAC_CH1 is PA4
