In the new HAL this is renamed to I2C_NOSTRETCH_DISABLE.

By refactoring and reusing code from objboundmeth.

The native emitter doesn't provide proper traceback info so this test
should not be run in that case.

The custom IRQ handler only works for F4 MCUs, which have the SR1
register.

To not conflict with recently made available globally baremetal
moduselect.

stdio.h was included in all HAL files only to provide
definition of NULL symbol

"stdio.h" includes "types.h" which contains some conflicting definitions
with "drivers/cc3000/inc/socket.h"

Use custom handlers providing minimal required functionality
because those provided by ST increase code size by almost 2 KiB.

HAL Driver before v1.4.2 had a bug which caused clearing all pending
flags in MSR, TSR, RF0R and RF1R instead of only the requested one.

This is why micropython got away without explicitly clearing flags
in IRQ handler.

Current version of HAL drivers checks if `hdma->State == HAL_DMA_STATE_READY`
before executing some functions.

Current version of HAL drivers optimize IRQ handler by using precalculated
DMA register address and stream bitshift instead of calculating it on every interrupt.

Since we skip call to `HAL_DMA_Init` on reused DMA, fields StreamBaseAddress and StreamIndex
of DMA handle are not initialized and thus leads to SegFault in `DMA_IRQHandler`.

HAL_DMA_Init is a big routine and we do not need to call it on each use of DMA
(ex.: series of I2C operations) and DMA_CalcBaseAndBitshift is really small and
releasing it increases code size by only 8 bytes.

This is required by HAL Driver for error handling since v1.5.0

CMSIS v2.5.0 removed all uint32_t casts and uses only Misra Cast (U)

changes include:
* use single GPIO.BSRR instead of BSRRH and BSRRL
* change HSE_STARTUP_TIMEOUT to 100 ms
* define LSE_STARTUP_TIMEOUT to 5 s