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hal: stm32cube: Fix warning when SPI STM32F0 LL API is compiled

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Current implementation of LL_SPI_TransmitData16 on F0 family
generates following warning:
"warning: dereferencing type-punned pointer will break strict-aliasing
rules [-Wstrict-aliasing]"
Besides being forbidden by rule, this cast is not needed, as register is
16 bits wide. Modification has been tested on F0 SoC.
stm32yyxx_ll_spi.h being included in soc.h file, warning is generated
at each compiled object, this commit allows a clean build.
This issue is referenced in ST and tracked under
reference  13359. Code will be updated on upcoming stm32cube updates.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2017-09-11 15:33:15 +02:00 committed by Anas Nashif
parent 7caa56f608
commit 5f5480ac7d
2 changed files with 15 additions and 1 deletions
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14
ext/hal/st/stm32cube/stm32f0xx/README
View file

@ -1 +1,15 @@
The current version supported in Zephyr for STM32F0 Cube is V1.9.0
Patch List:
===========
*Current implementation of LL_SPI_TransmitData16 on F0 family
generates following warning:
"warning: dereferencing type-punned pointer will break strict-aliasing
rules [-Wstrict-aliasing]"
Besides being forbidden by rule, this cast is not needed, as register is
16 bits wide. Modification has been tested on F0 SoC.
stm32yyxx_ll_spi.h being included in soc.h file, warning is generated
at each compiled object, this commit allows a clean build.
Impacted files:
drivers/include/stm32f0xx_ll_spi.h

2
ext/hal/st/stm32cube/stm32f0xx/drivers/include/stm32f0xx_ll_spi.h
View file

@ -1385,7 +1385,7 @@ __STATIC_INLINE void LL_SPI_TransmitData8(SPI_TypeDef *SPIx, uint8_t TxData)
*/
__STATIC_INLINE void LL_SPI_TransmitData16(SPI_TypeDef *SPIx, uint16_t TxData)
{
*((__IO uint16_t *)&SPIx->DR) = TxData;
SPIx->DR = TxData;
}
/**