Bug STM32F107RCTx SPI REMAPPED NOT WORK

[vekli]

STM32Cube FW_F1 V1.8.4

Conditions:

SPI1 or SPI3 remapped to PB3-5 pins.

Problem:

SPI not work.

Solution:

Enable Debug Serial Wire (PA13 PA14)

SWJ function changes SWJ_CFG[2:0] bits

stm32f1xx_hal_msp.c line 81

__HAL_AFIO_REMAP_SWJ_NOJTAG();

do{ uint32_t tmpreg = ((AFIO_TypeDef *)((0x40000000UL + 0x00010000UL) + 0x00000000UL))->MAPR;   \

                        tmpreg &= ~(0x7UL << (24U)); \

                        tmpreg |= (0x1UL << (25U));     \

                        ((AFIO_TypeDef *)((0x40000000UL + 0x00010000UL) + 0x00000000UL))->MAPR = tmpreg;       \

                        }while(0u)

For some reasons SPI remap function changes SWJ_CFG[2:0] bits too, somehow it depend on previous state of SWJ_CFG.

stm32f1xx_hal_msp.c line 121

__HAL_AFIO_REMAP_SPI1_ENABLE();

do{ uint32_t tmpreg = ((AFIO_TypeDef *)((0x40000000UL + 0x00010000UL) + 0x00000000UL))->MAPR; \

                        tmpreg |= (0x7UL << (24U)); \

                        tmpreg |= (0x1UL << (0U));     \

                        ((AFIO_TypeDef *)((0x40000000UL + 0x00010000UL) + 0x00000000UL))->MAPR = tmpreg;     \

                        }while(0u)

[Tesla DeLorean]

The F1 series is old and clumsy.

Yes remapping often requires attention, if you map functionality to a particular block of pins you might need to map other functionality off those same pins to avoid conflicts.

Much is likely to be flagged in errata, etc, at this point.