#define STM_SPI_CR2_TXDMAEN 1
#define STM_SPI_CR2_RXDMAEN 0
+#define STM_SPI_SR_FRE 8
#define STM_SPI_SR_BSY 7
#define STM_SPI_SR_OVR 6
#define STM_SPI_SR_MODF 5
#define STM_SPI_SR_CRCERR 4
+#define STM_SPI_SR_UDR 3
+#define STM_SPI_SR_CHSIDE 2
#define STM_SPI_SR_TXE 1
#define STM_SPI_SR_RXNE 0