#define UART_FCR_RFITL_1BYTE (0x0 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 1 byte */
#define UART_FCR_RFITL_4BYTES (0x1 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 4 bytes */
#define UART_FCR_RFITL_8BYTES (0x2 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 8 bytes */
#define UART_FCR_RFITL_14BYTES (0x3 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 14 bytes */
#define UART_FCR_RTS_TRI_LEV_1BYTE (0x0 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 1 byte */
#define UART_FCR_RTS_TRI_LEV_4BYTES (0x1 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 4 bytes */
#define UART_FCR_RTS_TRI_LEV_8BYTES (0x2 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 8 bytes */
#define UART_FCR_RTS_TRI_LEV_14BYTES (0x3 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 14 bytes */
这个是UART.H头文件中的一部分定义，看不懂。都 是什么意思？ 相关资料在哪看 |
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