> These definitions correct? Or I am understanding something wrong. It seems that these definitions are wrong. Probably a copy-paste error from COMPx_OUTx definitions.
But what is strange, COMP worked even with bad input pins configuration for stm32f334-disco/powerled example. Unfortunately, my stm32f334-disco board died so I can't do any tests for this moment. śr., 16 cze 2021 o 00:51 Nathan Hartman <hartman.nat...@gmail.com> napisał(a): > Are these conditions also applicable to the STM32G4 family? This family has > different/newer IP blocks than some other STM32 families, but I'm away from > my computer and can't check the details now. Maybe raiden00pl knows more. > IIRC he fixed some of my mistakes in the pinmap :-) > > IIRC STmicro has somewhere an application note describing the analog > features like OPAMP, COMP, etc, and other features and how they differ from > other STM32 families. That document could come in handy. > > Nathan > > > On Tue, Jun 15, 2021 at 10:51 AM Daniel Pereira Carvalho < > daniel...@gmail.com> wrote: > > > Hi, > > > > I'm trying to use the analog comparators of the nucleo-g431kb board. As > a > > reference I'm using the implementation and pin definition of the > > nucleo-f334r8 board. Looking at RM0364 Reference manual section *15.3.2 > > COMP pins and internal signals* there is the following > > > > *"The I/Os used as comparators inputs must be configured in analog mode > in > > the GPIOs registers."* > > > > But looking at file arch/arm/src/stm32/hardware/stm32f33xxx_pinmap.h the > > comparator inputs are defined as Alternate Functions > > > > /* Comparator Inputs non inverting */ > > > > #define GPIO_COMP2_INP (GPIO_ALT|GPIO_AF8|GPIO_PORTA|GPIO_PIN7) > > #define GPIO_COMP4_INP (GPIO_ALT|GPIO_AF8|GPIO_PORTB|GPIO_PIN0) > > #define GPIO_COMP6_INP (GPIO_ALT|GPIO_AF8|GPIO_PORTB|GPIO_PIN11) > > > > /* Comparator Inputs inverting */ > > > > #define GPIO_COMP2_INM_1 (GPIO_ALT|GPIO_AF8|GPIO_PORTA|GPIO_PIN2) > > #define GPIO_COMP2_INM_2 (GPIO_ALT|GPIO_AF8|GPIO_PORTA|GPIO_PIN4) > > #define GPIO_COMP4_INM_1 (GPIO_ALT|GPIO_AF8|GPIO_PORTB|GPIO_PIN2) > > #define GPIO_COMP4_INM_2 (GPIO_ALT|GPIO_AF8|GPIO_PORTA|GPIO_PIN4) > > #define GPIO_COMP6_INM_1 (GPIO_ALT|GPIO_AF8|GPIO_PORTA|GPIO_PIN4) > > #define GPIO_COMP6_INM_2 (GPIO_ALT|GPIO_AF8|GPIO_PORTB|GPIO_PIN15) > > > > From the STM32F334x8 datasheet, Table 14 Alternate functions, there are > no > > corresponding definitions to configure comparator inputs on AF8. > > > > These definitions correct? Or I am understanding something wrong. > > > > Thanks > > > > Daniel Pereira de Carvalho > > >
