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HAL_FORCE_MODIFY_U32_REG_FIELD macro
@cond Macro to force a 32-bit read, modify, then write on a peripheral register Due to a GCC bug, the compiler may still try to optimize read/writes to peripheral register fields by using 8/16 bit access, even if they are marked volatile (i.e., -fstrict-volatile-bitfields has no effect). For ESP chips, the peripheral bus only allows 32-bit read/writes. The following macro works around the compiler issue by forcing a 32-bit read/modify/write.
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This macro should only be called on register fields of xxx_struct.h type headers, as it depends on the presence of a 'val' field of the register union. Current implementation reads into a uint32_t instead of copy base_reg direclty to temp_reg. The reason being that C++ does not create a copy constructor for volatile structs.
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