- (1 << STM_SPI_CR1_SSM) |
- (1 << STM_SPI_CR1_SSI) |
- (0 << STM_SPI_CR1_LSBFIRST) |
- (1 << STM_SPI_CR1_SPE) |
- (STM_SPI_CR1_BR_PCLK_4 << STM_SPI_CR1_BR) |
+ (1 << STM_SPI_CR1_SSM) | /* Software SS handling */
+ (1 << STM_SPI_CR1_SSI) | /* ... */
+ (0 << STM_SPI_CR1_LSBFIRST) | /* Little endian */
+ (1 << STM_SPI_CR1_SPE) | /* Enable SPI unit */
+ (STM_SPI_CR1_BR_PCLK_4 << STM_SPI_CR1_BR) | /* baud rate to pclk/4 */