STM32L4 SPI UART __IO divergence ?

[Noyb]

Posted on March 23, 2016 at 09:58

stm32l4xx_hal_spi.h

  HAL_SPI_StateTypeDef    State;          /* SPI communication state        */

  uint32_t                ErrorCode;      /* SPI Error code                 */

stm32l4xx_hal_uart.h

  __IO HAL_UART_StateTypeDef    State;       /*!< UART communication state           */

  __IO uint32_t             ErrorCode;       /*!< UART Error code                    */

Why it is __IO in UART and not in SPI ?

[Amel NASRI]

Posted on March 25, 2016 at 15:04

Hi Noyb,

Your question is noted to investigate the reason behind the missing ''__IO'' for SPI.

I will keep you informed if I get more details.

However I would like to know if you faced any particular issue that leads you to make the update by your self? Or it is just a comment based on code comparison?

-Mayla-

[Noyb]

Posted on March 29, 2016 at 09:40

Hi Mayla,

the reasons are a little bit from both :

1- issue with the SPI I encountered here : https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32%20SPI%20DMA%20FIFO%20not%20writing%20into%20or%20corrupting%20memory

2- while coding a little serial port framework above HAL, I read the library code to understand how the DMA synchronization was performed on SPI and USART, which lead me to compare structure definitions and find the divergence

[Amel NASRI]

Posted on June 29, 2016 at 14:53

HiNoyb,

Sorry for this delayed update. I checked in the last version of STM32CubeL4 (V1.5.0), we have the following:

__IO HAL_SPI_StateTypeDef State; 
/*!< SPI communication state */
__IO uint32_t ErrorCode; 
/*!< SPI Error code */

-Mayla-