I have a STM32F334 Discovery kit [1] but I never use this board nor the Analog Comparator peripheral. If you could help me with the tests I can work on this.
Thanks Daniel Pereira de Carvalho [1] https://www.st.com/en/evaluation-tools/32f3348discovery.html Em qua., 16 de jun. de 2021 às 03:19, raiden00pl <raiden0...@gmail.com> escreveu: > > 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 > > > > > >
