From deca336aedab4cdd8f5d84ee5e3877977d525fdd Mon Sep 17 00:00:00 2001 From: Frederic Pillon Date: Thu, 1 Sep 2022 18:49:14 +0200 Subject: [PATCH] fix: set only AF mode for mcu with single AF Fixes #1798 Signed-off-by: Frederic Pillon --- cores/arduino/stm32/stm32_def.h | 14 ++++++++++++++ libraries/SrcWrapper/src/stm32/pinmap.c | 4 +++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/cores/arduino/stm32/stm32_def.h b/cores/arduino/stm32/stm32_def.h index 407274c6ec..cb4c63c87b 100644 --- a/cores/arduino/stm32/stm32_def.h +++ b/cores/arduino/stm32/stm32_def.h @@ -90,6 +90,20 @@ #define PinMap_USB PinMap_USB_DRD_FS #endif +/** + * Some mcu have single AF and thus only AF mode should be configured. + * No AFRL/AFRG registers exists so they should not be configured. + * In that case the AF does not exists so defining the linked AF + * to 0x7F (max value of the AFNUM i.e. STM_PIN_AFNUM_MASK) + * See GitHub issue #1798. + */ +#if defined(STM32F0xx) && !defined(GPIO_AF0_TIM3) + #define GPIO_AF0_TIM3 STM_PIN_AFNUM_MASK +#endif +#if defined(STM32L0xx) && !defined(GPIO_AF1_SPI1) + #define GPIO_AF1_SPI1 STM_PIN_AFNUM_MASK +#endif + /** * Libc porting layers */ diff --git a/libraries/SrcWrapper/src/stm32/pinmap.c b/libraries/SrcWrapper/src/stm32/pinmap.c index 2ffbfcb425..faa04a8da8 100644 --- a/libraries/SrcWrapper/src/stm32/pinmap.c +++ b/libraries/SrcWrapper/src/stm32/pinmap.c @@ -242,7 +242,9 @@ void pin_function(PinName pin, int function) case STM_PIN_ALTERNATE: ll_mode = LL_GPIO_MODE_ALTERNATE; /* In case of ALT function, also set the afnum */ - pin_SetAFPin(gpio, pin, afnum); + if (afnum != STM_PIN_AFNUM_MASK) { + pin_SetAFPin(gpio, pin, afnum); + } break; case STM_PIN_ANALOG: ll_mode = LL_GPIO_MODE_ANALOG; pFad - Phonifier reborn

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